gtk2_ardour/editor_drag.cc

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <stdint.h>
  25 #include <algorithm>
  26
  27 #include "pbd/memento_command.h"
  28 #include "pbd/basename.h"
  29 #include "pbd/stateful_diff_command.h"
  30
  31 #include "gtkmm2ext/utils.h"
  32
  33 #include "ardour/audioengine.h"
  34 #include "ardour/audioregion.h"
  35 #include "ardour/audio_track.h"
  36 #include "ardour/dB.h"
  37 #include "ardour/midi_region.h"
  38 #include "ardour/midi_track.h"
  39 #include "ardour/operations.h"
  40 #include "ardour/region_factory.h"
  41 #include "ardour/session.h"
  42
  43 #include "canvas/canvas.h"
  44 #include "canvas/scroll_group.h"
  45
  46 #include "editor.h"
  47 #include "i18n.h"
  48 #include "keyboard.h"
  49 #include "audio_region_view.h"
  50 #include "automation_region_view.h"
  51 #include "midi_region_view.h"
  52 #include "ardour_ui.h"
  53 #include "gui_thread.h"
  54 #include "control_point.h"
  55 #include "region_gain_line.h"
  56 #include "editor_drag.h"
  57 #include "audio_time_axis.h"
  58 #include "midi_time_axis.h"
  59 #include "selection.h"
  60 #include "midi_selection.h"
  61 #include "automation_time_axis.h"
  62 #include "debug.h"
  63 #include "editor_cursors.h"
  64 #include "mouse_cursors.h"
  65 #include "note_base.h"
  66 #include "patch_change.h"
  67 #include "ui_config.h"
  68 #include "verbose_cursor.h"
  69
  70 using namespace std;
  71 using namespace ARDOUR;
  72 using namespace PBD;
  73 using namespace Gtk;
  74 using namespace Gtkmm2ext;
  75 using namespace Editing;
  76 using namespace ArdourCanvas;
  77
  78 using Gtkmm2ext::Keyboard;
  79
  80 double ControlPointDrag::_zero_gain_fraction = -1.0;
  81
  82 DragManager::DragManager (Editor* e)
  83         : _editor (e)
  84         , _ending (false)
  85         , _current_pointer_x (0.0)
  86         , _current_pointer_y (0.0)
  87         , _current_pointer_frame (0)
  88         , _old_follow_playhead (false)
  89 {
  90 }
  91
  92 DragManager::~DragManager ()
  93 {
  94         abort ();
  95 }
  96
  97 /** Call abort for each active drag */
  98 void
  99 DragManager::abort ()
 100 {
 101         _ending = true;
 102
 103         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 104                 (*i)->abort ();
 105                 delete *i;
 106         }
 107
 108         if (!_drags.empty ()) {
 109                 _editor->set_follow_playhead (_old_follow_playhead, false);
 110         }
 111
 112         _drags.clear ();
 113         _editor->abort_reversible_command();
 114
 115         _ending = false;
 116 }
 117
 118 void
 119 DragManager::add (Drag* d)
 120 {
 121         d->set_manager (this);
 122         _drags.push_back (d);
 123 }
 124
 125 void
 126 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
 127 {
 128         d->set_manager (this);
 129         _drags.push_back (d);
 130         start_grab (e, c);
 131 }
 132
 133 void
 134 DragManager::start_grab (GdkEvent* e, Gdk::Cursor* c)
 135 {
 136         /* Prevent follow playhead during the drag to be nice to the user */
 137         _old_follow_playhead = _editor->follow_playhead ();
 138         _editor->set_follow_playhead (false);
 139
 140         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 141
 142         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 143                 (*i)->start_grab (e, c);
 144         }
 145 }
 146
 147 /** Call end_grab for each active drag.
 148  *  @return true if any drag reported movement having occurred.
 149  */
 150 bool
 151 DragManager::end_grab (GdkEvent* e)
 152 {
 153         _ending = true;
 154
 155         bool r = false;
 156         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 157                 bool const t = (*i)->end_grab (e);
 158                 if (t) {
 159                         r = true;
 160                 }
 161                 delete *i;
 162         }
 163
 164         _drags.clear ();
 165
 166         _ending = false;
 167
 168         _editor->set_follow_playhead (_old_follow_playhead, false);
 169
 170         return r;
 171 }
 172
 173 void
 174 DragManager::mark_double_click ()
 175 {
 176         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 177                 (*i)->set_double_click (true);
 178         }
 179 }
 180
 181 bool
 182 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 183 {
 184         bool r = false;
 185
 186         /* calling this implies that we expect the event to have canvas
 187          * coordinates
 188          *
 189          * Can we guarantee that this is true?
 190          */
 191
 192         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 193
 194         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 195                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 196                 /* run all handlers; return true if at least one of them
 197                    returns true (indicating that the event has been handled).
 198                 */
 199                 if (t) {
 200                         r = true;
 201                 }
 202
 203         }
 204
 205         return r;
 206 }
 207
 208 bool
 209 DragManager::have_item (ArdourCanvas::Item* i) const
 210 {
 211         list<Drag*>::const_iterator j = _drags.begin ();
 212         while (j != _drags.end() && (*j)->item () != i) {
 213                 ++j;
 214         }
 215
 216         return j != _drags.end ();
 217 }
 218
 219 Drag::Drag (Editor* e, ArdourCanvas::Item* i, bool trackview_only)
 220         : _editor (e)
 221         , _drags (0)
 222         , _item (i)
 223         , _pointer_frame_offset (0)
 224         , _x_constrained (false)
 225         , _y_constrained (false)
 226         , _was_rolling (false)
 227         , _trackview_only (trackview_only)
 228         , _move_threshold_passed (false)
 229         , _starting_point_passed (false)
 230         , _initially_vertical (false)
 231         , _was_double_click (false)
 232         , _grab_x (0.0)
 233         , _grab_y (0.0)
 234         , _last_pointer_x (0.0)
 235         , _last_pointer_y (0.0)
 236         , _raw_grab_frame (0)
 237         , _grab_frame (0)
 238         , _last_pointer_frame (0)
 239         , _snap_delta (0)
 240 {
 241
 242 }
 243
 244 void
 245 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t /*time*/)
 246 {
 247         _item->ungrab ();
 248         _item = new_item;
 249
 250         if (!_cursor_ctx) {
 251                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 252         } else {
 253                 _cursor_ctx->change (cursor);
 254         }
 255
 256         _item->grab ();
 257 }
 258
 259 void
 260 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 261 {
 262
 263         /* we set up x/y dragging constraints on first move */
 264
 265         _raw_grab_frame = _editor->canvas_event_sample (event, &_grab_x, &_grab_y);
 266
 267         setup_pointer_frame_offset ();
 268         _grab_frame = adjusted_frame (_raw_grab_frame, event);
 269         _last_pointer_frame = _grab_frame;
 270         _last_pointer_x = _grab_x;
 271
 272         if (_trackview_only) {
 273                 _grab_y = _grab_y - _editor->get_trackview_group()->canvas_origin().y;
 274         }
 275
 276         _last_pointer_y = _grab_y;
 277
 278         _item->grab ();
 279
 280         if (!_editor->cursors()->is_invalid (cursor)) {
 281                 /* CAIROCANVAS need a variant here that passes *cursor */
 282                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 283         }
 284
 285         if (_editor->session() && _editor->session()->transport_rolling()) {
 286                 _was_rolling = true;
 287         } else {
 288                 _was_rolling = false;
 289         }
 290
 291         switch (_editor->snap_type()) {
 292         case SnapToRegionStart:
 293         case SnapToRegionEnd:
 294         case SnapToRegionSync:
 295         case SnapToRegionBoundary:
 296                 _editor->build_region_boundary_cache ();
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 /** Call to end a drag `successfully'.  Ungrabs item and calls
 304  *  subclass' finished() method.
 305  *
 306  *  @param event GDK event, or 0.
 307  *  @return true if some movement occurred, otherwise false.
 308  */
 309 bool
 310 Drag::end_grab (GdkEvent* event)
 311 {
 312         _editor->stop_canvas_autoscroll ();
 313
 314         _item->ungrab ();
 315
 316         finished (event, _move_threshold_passed);
 317
 318         _editor->verbose_cursor()->hide ();
 319         _cursor_ctx.reset();
 320
 321         return _move_threshold_passed;
 322 }
 323
 324 framepos_t
 325 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 326 {
 327         framepos_t pos = 0;
 328
 329         if (f > _pointer_frame_offset) {
 330                 pos = f - _pointer_frame_offset;
 331         }
 332
 333         if (snap) {
 334                 _editor->snap_to_with_modifier (pos, event);
 335         }
 336
 337         return pos;
 338 }
 339
 340 framepos_t
 341 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 342 {
 343         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 344 }
 345
 346 frameoffset_t
 347 Drag::snap_delta (guint state) const
 348 {
 349         if (ArdourKeyboard::indicates_snap_delta (state)) {
 350                 return _snap_delta;
 351         }
 352
 353         return 0;
 354 }
 355
 356 double
 357 Drag::current_pointer_x() const
 358 {
 359         return _drags->current_pointer_x ();
 360 }
 361
 362 double
 363 Drag::current_pointer_y () const
 364 {
 365         if (!_trackview_only) {
 366                 return _drags->current_pointer_y ();
 367         }
 368
 369         return _drags->current_pointer_y () - _editor->get_trackview_group()->canvas_origin().y;
 370 }
 371
 372 void
 373 Drag::setup_snap_delta (framepos_t pos)
 374 {
 375         framepos_t temp = pos;
 376         _editor->snap_to (temp, ARDOUR::RoundNearest, false, true);
 377         _snap_delta = temp - pos;
 378 }
 379
 380 bool
 381 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 382 {
 383         /* check to see if we have moved in any way that matters since the last motion event */
 384         if (_move_threshold_passed &&
 385             (!x_movement_matters() || _last_pointer_x == current_pointer_x ()) &&
 386             (!y_movement_matters() || _last_pointer_y == current_pointer_y ()) ) {
 387                 return false;
 388         }
 389
 390         pair<framecnt_t, int> const threshold = move_threshold ();
 391
 392         bool const old_move_threshold_passed = _move_threshold_passed;
 393
 394         if (!_move_threshold_passed) {
 395
 396                 bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
 397                 bool const yp = (::fabs ((current_pointer_y () - _grab_y)) >= threshold.second);
 398
 399                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 400         }
 401
 402         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 403
 404                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 405
 406                         if (old_move_threshold_passed != _move_threshold_passed) {
 407
 408                                 /* just changed */
 409
 410                                 if (fabs (current_pointer_y() - _grab_y) > fabs (current_pointer_x() - _grab_x)) {
 411                                         _initially_vertical = true;
 412                                 } else {
 413                                         _initially_vertical = false;
 414                                 }
 415                                 /** check constraints for this drag.
 416                                  *  Note that the current convention is to use "contains" for
 417                                  *  key modifiers during motion and "equals" when initiating a drag.
 418                                  *  In this case we haven't moved yet, so "equals" applies here.
 419                                  */
 420                                 if (Config->get_edit_mode() != Lock) {
 421                                         if (event->motion.state & Gdk::BUTTON2_MASK) {
 422                                                 // if dragging with button2, the motion is x constrained, with constraint modifier it is y constrained
 423                                                 if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 424                                                         _x_constrained = false;
 425                                                         _y_constrained = true;
 426                                                 } else {
 427                                                         _x_constrained = true;
 428                                                         _y_constrained = false;
 429                                                 }
 430                                         } else if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 431                                                 // if dragging normally, the motion is constrained to the first direction of movement.
 432                                                 if (_initially_vertical) {
 433                                                         _x_constrained = true;
 434                                                         _y_constrained = false;
 435                                                 } else {
 436                                                         _x_constrained = false;
 437                                                         _y_constrained = true;
 438                                                 }
 439                                         }
 440                                 } else {
 441                                         if (event->button.state & Gdk::BUTTON2_MASK) {
 442                                                 _x_constrained = false;
 443                                         } else {
 444                                                 _x_constrained = true;
 445                                         }
 446                                         _y_constrained = false;
 447                                 }
 448                         }
 449
 450                         if (!from_autoscroll) {
 451                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll (), false);
 452                         }
 453
 454                         if (!_editor->autoscroll_active() || from_autoscroll) {
 455
 456
 457                                 bool first_move = (_move_threshold_passed != old_move_threshold_passed) || from_autoscroll;
 458
 459                                 motion (event, first_move && !_starting_point_passed);
 460
 461                                 if (first_move && !_starting_point_passed) {
 462                                         _starting_point_passed = true;
 463                                 }
 464
 465                                 _last_pointer_x = _drags->current_pointer_x ();
 466                                 _last_pointer_y = current_pointer_y ();
 467                                 _last_pointer_frame = adjusted_current_frame (event, false);
 468                         }
 469
 470                         return true;
 471                 }
 472         }
 473
 474         return false;
 475 }
 476
 477 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 478 void
 479 Drag::abort ()
 480 {
 481         if (_item) {
 482                 _item->ungrab ();
 483         }
 484
 485         aborted (_move_threshold_passed);
 486
 487         _editor->stop_canvas_autoscroll ();
 488         _editor->verbose_cursor()->hide ();
 489 }
 490
 491 void
 492 Drag::show_verbose_cursor_time (framepos_t frame)
 493 {
 494         _editor->verbose_cursor()->set_time (frame);
 495         _editor->verbose_cursor()->show ();
 496 }
 497
 498 void
 499 Drag::show_verbose_cursor_duration (framepos_t start, framepos_t end, double /*xoffset*/)
 500 {
 501         _editor->verbose_cursor()->set_duration (start, end);
 502         _editor->verbose_cursor()->show ();
 503 }
 504
 505 void
 506 Drag::show_verbose_cursor_text (string const & text)
 507 {
 508         _editor->verbose_cursor()->set (text);
 509         _editor->verbose_cursor()->show ();
 510 }
 511
 512 boost::shared_ptr<Region>
 513 Drag::add_midi_region (MidiTimeAxisView* view, bool commit)
 514 {
 515         if (_editor->session()) {
 516                 const TempoMap& map (_editor->session()->tempo_map());
 517                 framecnt_t pos = grab_frame();
 518                 /* not that the frame rate used here can be affected by pull up/down which
 519                    might be wrong.
 520                 */
 521                 framecnt_t len = map.frame_at_beat (map.beat_at_frame (pos) + 1.0) - pos;
 522                 return view->add_region (grab_frame(), len, commit);
 523         }
 524
 525         return boost::shared_ptr<Region>();
 526 }
 527
 528 struct EditorOrderTimeAxisViewSorter {
 529         bool operator() (TimeAxisView* a, TimeAxisView* b) {
 530                 RouteTimeAxisView* ra = dynamic_cast<RouteTimeAxisView*> (a);
 531                 RouteTimeAxisView* rb = dynamic_cast<RouteTimeAxisView*> (b);
 532                 assert (ra && rb);
 533                 return ra->route()->order_key () < rb->route()->order_key ();
 534         }
 535 };
 536
 537 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 538         : Drag (e, i)
 539         , _primary (p)
 540         , _ntracks (0)
 541 {
 542         _editor->visible_order_range (&_visible_y_low, &_visible_y_high);
 543
 544         /* Make a list of tracks to refer to during the drag; we include hidden tracks,
 545            as some of the regions we are dragging may be on such tracks.
 546         */
 547
 548         TrackViewList track_views = _editor->track_views;
 549         track_views.sort (EditorOrderTimeAxisViewSorter ());
 550
 551         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 552                 _time_axis_views.push_back (*i);
 553
 554                 TimeAxisView::Children children_list = (*i)->get_child_list ();
 555                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 556                         _time_axis_views.push_back (j->get());
 557                 }
 558         }
 559
 560         /* the list of views can be empty at this point if this is a region list-insert drag
 561          */
 562
 563         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 564                 _views.push_back (DraggingView (*i, this, &(*i)->get_time_axis_view()));
 565         }
 566
 567         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), boost::bind (&RegionDrag::region_going_away, this, _1), gui_context());
 568 }
 569
 570 void
 571 RegionDrag::region_going_away (RegionView* v)
 572 {
 573         list<DraggingView>::iterator i = _views.begin ();
 574         while (i != _views.end() && i->view != v) {
 575                 ++i;
 576         }
 577
 578         if (i != _views.end()) {
 579                 _views.erase (i);
 580         }
 581 }
 582
 583 /** Given a TimeAxisView, return the index of it into the _time_axis_views vector,
 584  *  or -1 if it is not found.
 585  */
 586 int
 587 RegionDrag::find_time_axis_view (TimeAxisView* t) const
 588 {
 589         int i = 0;
 590         int const N = _time_axis_views.size ();
 591         while (i < N && _time_axis_views[i] != t) {
 592                 ++i;
 593         }
 594
 595         if (_time_axis_views[i] != t) {
 596                 return -1;
 597         }
 598
 599         return i;
 600 }
 601
 602 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 603         : RegionDrag (e, i, p, v)
 604         , _brushing (b)
 605         , _ignore_video_lock (false)
 606         , _total_x_delta (0)
 607         , _last_pointer_time_axis_view (0)
 608         , _last_pointer_layer (0)
 609         , _ndropzone (0)
 610         , _pdropzone (0)
 611         , _ddropzone (0)
 612 {
 613         DEBUG_TRACE (DEBUG::Drags, "New RegionMotionDrag\n");
 614 }
 615
 616 void
 617 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 618 {
 619         Drag::start_grab (event, cursor);
 620         setup_snap_delta (_last_frame_position);
 621
 622         show_verbose_cursor_time (_last_frame_position);
 623
 624         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (current_pointer_y ());
 625         if (tv.first) {
 626                 _last_pointer_time_axis_view = find_time_axis_view (tv.first);
 627                 assert(_last_pointer_time_axis_view >= 0);
 628                 _last_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
 629         }
 630
 631         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
 632                 _ignore_video_lock = true;
 633         }
 634
 635         if (_brushing) {
 636                 /* cross track dragging seems broken here. disabled for now. */
 637                 _y_constrained = true;
 638         }
 639 }
 640
 641 double
 642 RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
 643 {
 644         /* compute the amount of pointer motion in frames, and where
 645            the region would be if we moved it by that much.
 646         */
 647         *pending_region_position = adjusted_frame (_drags->current_pointer_frame (), event, false);
 648
 649         framepos_t sync_frame;
 650         framecnt_t sync_offset;
 651         int32_t sync_dir;
 652
 653         sync_offset = _primary->region()->sync_offset (sync_dir);
 654
 655         /* we don't handle a sync point that lies before zero.
 656          */
 657         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 658
 659                 framecnt_t const sd = snap_delta (event->button.state);
 660                 sync_frame = *pending_region_position + (sync_dir * sync_offset) + sd;
 661
 662                 _editor->snap_to_with_modifier (sync_frame, event);
 663
 664                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame) - sd;
 665
 666         } else {
 667                 *pending_region_position = _last_frame_position;
 668         }
 669
 670         if (*pending_region_position > max_framepos - _primary->region()->length()) {
 671                 *pending_region_position = _last_frame_position;
 672         }
 673
 674         double dx = 0;
 675
 676         bool const x_move_allowed = !_x_constrained;
 677
 678         if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
 679
 680                 /* x movement since last time (in pixels) */
 681                 dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->samples_per_pixel;
 682
 683                 /* total x movement */
 684                 framecnt_t total_dx = *pending_region_position;
 685                 if (regions_came_from_canvas()) {
 686                         total_dx = total_dx - grab_frame ();
 687                 }
 688
 689                 /* check that no regions have gone off the start of the session */
 690                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 691                         if ((i->view->region()->position() + total_dx) < 0) {
 692                                 dx = 0;
 693                                 *pending_region_position = _last_frame_position;
 694                                 break;
 695                         }
 696                 }
 697
 698         }
 699
 700         return dx;
 701 }
 702
 703 int
 704 RegionDrag::apply_track_delta (const int start, const int delta, const int skip, const bool distance_only) const
 705 {
 706         if (delta == 0) {
 707                 return start;
 708         }
 709
 710         const int tavsize  = _time_axis_views.size();
 711         const int dt = delta > 0 ? +1 : -1;
 712         int current  = start;
 713         int target   = start + delta - skip;
 714
 715         assert (current < 0 || current >= tavsize || !_time_axis_views[current]->hidden());
 716         assert (skip == 0 || (skip < 0 && delta < 0) || (skip > 0 && delta > 0));
 717
 718         while (current >= 0 && current != target) {
 719                 current += dt;
 720                 if (current < 0 && dt < 0) {
 721                         break;
 722                 }
 723                 if (current >= tavsize && dt > 0) {
 724                         break;
 725                 }
 726                 if (current < 0 || current >= tavsize) {
 727                         continue;
 728                 }
 729
 730                 RouteTimeAxisView const * rtav = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[current]);
 731                 if (_time_axis_views[current]->hidden() || !rtav || !rtav->is_track()) {
 732                         target += dt;
 733                 }
 734
 735                 if (distance_only && current == start + delta) {
 736                         break;
 737                 }
 738         }
 739         return target;
 740 }
 741
 742 bool
 743 RegionMotionDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
 744 {
 745         if (_y_constrained) {
 746                 return false;
 747         }
 748
 749         const int tavsize  = _time_axis_views.size();
 750         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 751                 int n = apply_track_delta (i->time_axis_view, delta_track, skip_invisible);
 752                 assert (n < 0 || n >= tavsize || !_time_axis_views[n]->hidden());
 753
 754                 if (i->time_axis_view < 0 || i->time_axis_view >= tavsize) {
 755                         /* already in the drop zone */
 756                         if (delta_track >= 0) {
 757                                 /* downward motion - OK if others are still not in the dropzone */
 758                                 continue;
 759                         }
 760
 761                 }
 762
 763                 if (n < 0) {
 764                         /* off the top */
 765                         return false;
 766                 } else if (n >= tavsize) {
 767                         /* downward motion into drop zone. That's fine. */
 768                         continue;
 769                 }
 770
 771                 RouteTimeAxisView const * to = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[n]);
 772                 if (to == 0 || to->hidden() || !to->is_track() || to->track()->data_type() != i->view->region()->data_type()) {
 773                         /* not a track, or the wrong type */
 774                         return false;
 775                 }
 776
 777                 double const l = i->layer + delta_layer;
 778
 779                 /* Note that we allow layer to be up to 0.5 below zero, as this is used by `Expanded'
 780                    mode to allow the user to place a region below another on layer 0.
 781                 */
 782                 if (delta_track == 0 && (l < -0.5 || l >= int (to->view()->layers()))) {
 783                         /* Off the top or bottom layer; note that we only refuse if the track hasn't changed.
 784                            If it has, the layers will be munged later anyway, so it's ok.
 785                         */
 786                         return false;
 787                 }
 788         }
 789
 790         /* all regions being dragged are ok with this change */
 791         return true;
 792 }
 793
 794 struct DraggingViewSorter {
 795         bool operator() (const DraggingView& a, const DraggingView& b) {
 796                 return a.time_axis_view < b.time_axis_view;
 797         }
 798 };
 799
 800 void
 801 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 802 {
 803         double delta_layer = 0;
 804         int delta_time_axis_view = 0;
 805         int current_pointer_time_axis_view = -1;
 806
 807         assert (!_views.empty ());
 808
 809         /* Note: time axis views in this method are often expressed as an index into the _time_axis_views vector */
 810
 811         /* Find the TimeAxisView that the pointer is now over */
 812         const double cur_y = current_pointer_y ();
 813         pair<TimeAxisView*, double> const r = _editor->trackview_by_y_position (cur_y);
 814         TimeAxisView* tv = r.first;
 815
 816         if (!tv && cur_y < 0) {
 817                 /* above trackview area, autoscroll hasn't moved us since last time, nothing to do */
 818                 return;
 819         }
 820
 821         /* find drop-zone y-position */
 822         Coord last_track_bottom_edge;
 823         last_track_bottom_edge = 0;
 824         for (std::vector<TimeAxisView*>::reverse_iterator t = _time_axis_views.rbegin(); t != _time_axis_views.rend(); ++t) {
 825                 if (!(*t)->hidden()) {
 826                         last_track_bottom_edge = (*t)->canvas_display()->canvas_origin ().y + (*t)->effective_height();
 827                         break;
 828                 }
 829         }
 830
 831         if (tv && tv->view()) {
 832                 /* the mouse is over a track */
 833                 double layer = r.second;
 834
 835                 if (first_move && tv->view()->layer_display() == Stacked) {
 836                         tv->view()->set_layer_display (Expanded);
 837                 }
 838
 839                 /* Here's the current pointer position in terms of time axis view and layer */
 840                 current_pointer_time_axis_view = find_time_axis_view (tv);
 841                 assert(current_pointer_time_axis_view >= 0);
 842
 843                 double const current_pointer_layer = tv->layer_display() == Overlaid ? 0 : layer;
 844
 845                 /* Work out the change in y */
 846
 847                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
 848                 if (!rtv || !rtv->is_track()) {
 849                         /* ignore busses early on. we can't move any regions on them */
 850                 } else if (_last_pointer_time_axis_view < 0) {
 851                         /* Was in the drop-zone, now over a track.
 852                          * Hence it must be an upward move (from the bottom)
 853                          *
 854                          * track_index is still -1, so delta must be set to
 855                          * move up the correct number of tracks from the bottom.
 856                          *
 857                          * This is necessary because steps may be skipped if
 858                          * the bottom-most track is not a valid target and/or
 859                          * if there are hidden tracks at the bottom.
 860                          * Hence the initial offset (_ddropzone) as well as the
 861                          * last valid pointer position (_pdropzone) need to be
 862                          * taken into account.
 863                          */
 864                         delta_time_axis_view = current_pointer_time_axis_view - _time_axis_views.size () + _ddropzone - _pdropzone;
 865                 } else {
 866                         delta_time_axis_view = current_pointer_time_axis_view - _last_pointer_time_axis_view;
 867                 }
 868
 869                 /* TODO needs adjustment per DraggingView,
 870                  *
 871                  * e.g. select one region on the top-layer of a track
 872                  * and one region which is at the bottom-layer of another track
 873                  * drag both.
 874                  *
 875                  * Indicated drop-zones and layering is wrong.
 876                  * and may infer additional layers on the target-track
 877                  * (depending how many layers the original track had).
 878                  *
 879                  * Or select two regions (different layers) on a same track,
 880                  * move across a non-layer track.. -> layering info is lost.
 881                  * on drop either of the regions may be on top.
 882                  *
 883                  * Proposed solution: screw it :) well,
 884                  *   don't use delta_layer, use an absolute value
 885                  *   1) remember DraggingView's layer  as float 0..1  [current layer / all layers of source]
 886                  *   2) calculate current mouse pos, y-pos inside track divided by height of mouse-over track.
 887                  *   3) iterate over all DraggingView, find the one that is over the track with most layers
 888                  *   4) proportionally scale layer to layers available on target
 889                  */
 890                 delta_layer = current_pointer_layer - _last_pointer_layer;
 891
 892         }
 893         /* for automation lanes, there is a TimeAxisView but no ->view()
 894          * if (!tv) -> dropzone
 895          */
 896         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view >= 0) {
 897                 /* Moving into the drop-zone.. */
 898                 delta_time_axis_view = _time_axis_views.size () - _last_pointer_time_axis_view;
 899                 /* delta_time_axis_view may not be sufficient to move into the DZ
 900                  * the mouse may enter it, but it may not be a valid move due to
 901                  * constraints.
 902                  *
 903                  * -> remember the delta needed to move into the dropzone
 904                  */
 905                 _ddropzone = delta_time_axis_view;
 906                 /* ..but subtract hidden tracks (or routes) at the bottom.
 907                  * we silently move mover them
 908                  */
 909                 _ddropzone -= apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 910                               - _time_axis_views.size();
 911         }
 912         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view < 0) {
 913                 /* move around inside the zone.
 914                  * This allows to move further down until all regions are in the zone.
 915                  */
 916                 const double ptr_y = cur_y + _editor->get_trackview_group()->canvas_origin().y;
 917                 assert(ptr_y >= last_track_bottom_edge);
 918                 assert(_ddropzone > 0);
 919
 920                 /* calculate mouse position in 'tracks' below last track. */
 921                 const double dzi_h = TimeAxisView::preset_height (HeightNormal);
 922                 uint32_t dzpos = _ddropzone + floor((1 + ptr_y - last_track_bottom_edge) / dzi_h);
 923
 924                 if (dzpos > _pdropzone && _ndropzone < _ntracks) {
 925                         // move further down
 926                         delta_time_axis_view =  dzpos - _pdropzone;
 927                 } else if (dzpos < _pdropzone && _ndropzone > 0) {
 928                         // move up inside the DZ
 929                         delta_time_axis_view =  dzpos - _pdropzone;
 930                 }
 931         }
 932
 933         /* Work out the change in x */
 934         framepos_t pending_region_position;
 935         double const x_delta = compute_x_delta (event, &pending_region_position);
 936         _last_frame_position = pending_region_position;
 937
 938         /* calculate hidden tracks in current y-axis delta */
 939         int delta_skip = 0;
 940         if (_last_pointer_time_axis_view < 0 && _pdropzone > 0) {
 941                 /* The mouse is more than one track below the dropzone.
 942                  * distance calculation is not needed (and would not work, either
 943                  * because the dropzone is "packed").
 944                  *
 945                  * Except when [partially] moving regions out of dropzone in a large step.
 946                  * (the mouse may or may not remain in the DZ)
 947                  * Hidden tracks at the bottom of the TAV need to be skipped.
 948                  *
 949                  * This also handles the case if the mouse entered the DZ
 950                  * in a large step (exessive delta), either due to fast-movement,
 951                  * autoscroll, laggy UI. _ddropzone copensates for that (see "move into dz" above)
 952                  */
 953                 if (delta_time_axis_view < 0 && (int)_ddropzone - delta_time_axis_view >= (int)_pdropzone) {
 954                         const int dt = delta_time_axis_view + (int)_pdropzone - (int)_ddropzone;
 955                         assert(dt <= 0);
 956                         delta_skip = apply_track_delta(_time_axis_views.size(), dt, 0, true)
 957                                 -_time_axis_views.size() - dt;
 958                 }
 959         }
 960         else if (_last_pointer_time_axis_view < 0) {
 961                 /* Moving out of the zone. Check for hidden tracks at the bottom. */
 962                 delta_skip = apply_track_delta(_time_axis_views.size(), delta_time_axis_view, 0, true)
 963                              -_time_axis_views.size() - delta_time_axis_view;
 964         } else {
 965                 /* calculate hidden tracks that are skipped by the pointer movement */
 966                 delta_skip = apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 967                              - _last_pointer_time_axis_view
 968                              - delta_time_axis_view;
 969         }
 970
 971         /* Verify change in y */
 972         if (!y_movement_allowed (delta_time_axis_view, delta_layer, delta_skip)) {
 973                 /* this y movement is not allowed, so do no y movement this time */
 974                 delta_time_axis_view = 0;
 975                 delta_layer = 0;
 976                 delta_skip = 0;
 977         }
 978
 979         if (x_delta == 0 && (tv && tv->view() && delta_time_axis_view == 0) && delta_layer == 0 && !first_move) {
 980                 /* haven't reached next snap point, and we're not switching
 981                    trackviews nor layers. nothing to do.
 982                 */
 983                 return;
 984         }
 985
 986         typedef map<boost::shared_ptr<Playlist>, double> PlaylistDropzoneMap;
 987         PlaylistDropzoneMap playlist_dropzone_map;
 988         _ndropzone = 0; // number of elements currently in the dropzone
 989
 990         if (first_move) {
 991                 /* sort views by time_axis.
 992                  * This retains track order in the dropzone, regardless
 993                  * of actual selection order
 994                  */
 995                 _views.sort (DraggingViewSorter());
 996
 997                 /* count number of distinct tracks of all regions
 998                  * being dragged, used for dropzone.
 999                  */
1000                 int prev_track = -1;
1001                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1002                         if (i->time_axis_view != prev_track) {
1003                                 prev_track = i->time_axis_view;
1004                                 ++_ntracks;
1005                         }
1006                 }
1007 #ifndef NDEBUG
1008                 int spread =
1009                         _views.back().time_axis_view -
1010                         _views.front().time_axis_view;
1011
1012                 spread -= apply_track_delta (_views.front().time_axis_view, spread, 0, true)
1013                           -  _views.back().time_axis_view;
1014
1015                 printf("Dragging region(s) from %d different track(s), max dist: %d\n", _ntracks, spread);
1016 #endif
1017         }
1018
1019         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1020
1021                 RegionView* rv = i->view;
1022                 double y_delta;
1023
1024                 y_delta = 0;
1025
1026                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1027                         continue;
1028                 }
1029
1030                 if (first_move) {
1031                         rv->drag_start ();
1032
1033                         /* reparent the regionview into a group above all
1034                          * others
1035                          */
1036
1037                         ArdourCanvas::Item* rvg = rv->get_canvas_group();
1038                         Duple rv_canvas_offset = rvg->parent()->canvas_origin ();
1039                         Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
1040                         rv->get_canvas_group()->reparent (_editor->_drag_motion_group);
1041                         /* move the item so that it continues to appear at the
1042                            same location now that its parent has changed.
1043                            */
1044                         rvg->move (rv_canvas_offset - dmg_canvas_offset);
1045                 }
1046
1047                 /* If we have moved tracks, we'll fudge the layer delta so that the
1048                    region gets moved back onto layer 0 on its new track; this avoids
1049                    confusion when dragging regions from non-zero layers onto different
1050                    tracks.
1051                 */
1052                 double this_delta_layer = delta_layer;
1053                 if (delta_time_axis_view != 0) {
1054                         this_delta_layer = - i->layer;
1055                 }
1056
1057                 int this_delta_time_axis_view = apply_track_delta(i->time_axis_view, delta_time_axis_view, delta_skip) - i->time_axis_view;
1058
1059                 int track_index = i->time_axis_view + this_delta_time_axis_view;
1060                 assert(track_index >= 0);
1061
1062                 if (track_index < 0 || track_index >= (int) _time_axis_views.size()) {
1063                         /* Track is in the Dropzone */
1064
1065                         i->time_axis_view = track_index;
1066                         assert(i->time_axis_view >= (int) _time_axis_views.size());
1067                         if (cur_y >= 0) {
1068
1069                                 double yposition = 0;
1070                                 PlaylistDropzoneMap::iterator pdz = playlist_dropzone_map.find (i->view->region()->playlist());
1071                                 rv->set_height (TimeAxisView::preset_height (HeightNormal));
1072                                 ++_ndropzone;
1073
1074                                 /* store index of each new playlist as a negative count, starting at -1 */
1075
1076                                 if (pdz == playlist_dropzone_map.end()) {
1077                                         /* compute where this new track (which doesn't exist yet) will live
1078                                            on the y-axis.
1079                                         */
1080                                         yposition = last_track_bottom_edge; /* where to place the top edge of the regionview */
1081
1082                                         /* How high is this region view ? */
1083
1084                                         boost::optional<ArdourCanvas::Rect> obbox = rv->get_canvas_group()->bounding_box ();
1085                                         ArdourCanvas::Rect bbox;
1086
1087                                         if (obbox) {
1088                                                 bbox = obbox.get ();
1089                                         }
1090
1091                                         last_track_bottom_edge += bbox.height();
1092
1093                                         playlist_dropzone_map.insert (make_pair (i->view->region()->playlist(), yposition));
1094
1095                                 } else {
1096                                         yposition = pdz->second;
1097                                 }
1098
1099                                 /* values are zero or negative, hence the use of min() */
1100                                 y_delta = yposition - rv->get_canvas_group()->canvas_origin().y;
1101                         }
1102
1103                 } else {
1104
1105                         /* The TimeAxisView that this region is now over */
1106                         TimeAxisView* current_tv = _time_axis_views[track_index];
1107
1108                         /* Ensure it is moved from stacked -> expanded if appropriate */
1109                         if (current_tv->view()->layer_display() == Stacked) {
1110                                 current_tv->view()->set_layer_display (Expanded);
1111                         }
1112
1113                         /* We're only allowed to go -ve in layer on Expanded views */
1114                         if (current_tv->view()->layer_display() != Expanded && (i->layer + this_delta_layer) < 0) {
1115                                 this_delta_layer = - i->layer;
1116                         }
1117
1118                         /* Set height */
1119                         rv->set_height (current_tv->view()->child_height ());
1120
1121                         /* Update show/hidden status as the region view may have come from a hidden track,
1122                            or have moved to one.
1123                         */
1124                         if (current_tv->hidden ()) {
1125                                 rv->get_canvas_group()->hide ();
1126                         } else {
1127                                 rv->get_canvas_group()->show ();
1128                         }
1129
1130                         /* Update the DraggingView */
1131                         i->time_axis_view = track_index;
1132                         i->layer += this_delta_layer;
1133
1134                         if (_brushing) {
1135                                 _editor->mouse_brush_insert_region (rv, pending_region_position);
1136                         } else {
1137                                 Duple track_origin;
1138
1139                                 /* Get the y coordinate of the top of the track that this region is now over */
1140                                 track_origin = current_tv->canvas_display()->item_to_canvas (track_origin);
1141
1142                                 /* And adjust for the layer that it should be on */
1143                                 StreamView* cv = current_tv->view ();
1144                                 switch (cv->layer_display ()) {
1145                                 case Overlaid:
1146                                         break;
1147                                 case Stacked:
1148                                         track_origin.y += (cv->layers() - i->layer - 1) * cv->child_height ();
1149                                         break;
1150                                 case Expanded:
1151                                         track_origin.y += (cv->layers() - i->layer - 0.5) * 2 * cv->child_height ();
1152                                         break;
1153                                 }
1154
1155                                 /* need to get the parent of the regionview
1156                                  * canvas group and get its position in
1157                                  * equivalent coordinate space as the trackview
1158                                  * we are now dragging over.
1159                                  */
1160
1161                                 y_delta = track_origin.y - rv->get_canvas_group()->canvas_origin().y;
1162
1163                         }
1164                 }
1165
1166                 /* Now move the region view */
1167                 rv->move (x_delta, y_delta);
1168
1169         } /* foreach region */
1170
1171         _total_x_delta += x_delta;
1172
1173         if (x_delta != 0 && !_brushing) {
1174                 show_verbose_cursor_time (_last_frame_position);
1175         }
1176
1177         /* keep track of pointer movement */
1178         if (tv) {
1179                 /* the pointer is currently over a time axis view */
1180
1181                 if (_last_pointer_time_axis_view < 0) {
1182                         /* last motion event was not over a time axis view
1183                          * or last y-movement out of the dropzone was not valid
1184                          */
1185                         int dtz = 0;
1186                         if (delta_time_axis_view < 0) {
1187                                 /* in the drop zone, moving up */
1188
1189                                 /* _pdropzone is the last known pointer y-axis position inside the DZ.
1190                                  * We do not use negative _last_pointer_time_axis_view because
1191                                  * the dropzone is "packed" (the actual track offset is ignored)
1192                                  *
1193                                  * As opposed to the actual number
1194                                  * of elements in the dropzone (_ndropzone)
1195                                  * _pdropzone is not constrained. This is necessary
1196                                  * to allow moving multiple regions with y-distance
1197                                  * into the DZ.
1198                                  *
1199                                  * There can be 0 elements in the dropzone,
1200                                  * even though the drag-pointer is inside the DZ.
1201                                  *
1202                                  * example:
1203                                  * [ Audio-track, Midi-track, Audio-track, DZ ]
1204                                  * move regions from both audio tracks at the same time into the
1205                                  * DZ by grabbing the region in the bottom track.
1206                                  */
1207                                 assert(current_pointer_time_axis_view >= 0);
1208                                 dtz = std::min((int)_pdropzone, (int)_ddropzone - delta_time_axis_view);
1209                                 _pdropzone -= dtz;
1210                         }
1211
1212                         /* only move out of the zone if the movement is OK */
1213                         if (_pdropzone == 0 && delta_time_axis_view != 0) {
1214                                 assert(delta_time_axis_view < 0);
1215                                 _last_pointer_time_axis_view = current_pointer_time_axis_view;
1216                                 /* if all logic and maths are correct, there is no need to assign the 'current' pointer.
1217                                  * the current position can be calculated as follows:
1218                                  */
1219                                 // a well placed oofus attack can still throw this off.
1220                                 // likley auto-scroll related, printf() debugging may tell, commented out for now.
1221                                 //assert (current_pointer_time_axis_view == _time_axis_views.size() - dtz + _ddropzone + delta_time_axis_view);
1222                         }
1223                 } else {
1224                         /* last motion event was also over a time axis view */
1225                         _last_pointer_time_axis_view += delta_time_axis_view;
1226                         assert(_last_pointer_time_axis_view >= 0);
1227                 }
1228
1229         } else {
1230
1231                 /* the pointer is not over a time axis view */
1232                 assert ((delta_time_axis_view > 0) || (((int)_pdropzone) >= (delta_skip - delta_time_axis_view)));
1233                 _pdropzone += delta_time_axis_view - delta_skip;
1234                 _last_pointer_time_axis_view = -1; // <0 : we're in the zone, value does not matter.
1235         }
1236
1237         _last_pointer_layer += delta_layer;
1238 }
1239
1240 void
1241 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
1242 {
1243         if (_copy && first_move) {
1244                 if (_x_constrained && !_brushing) {
1245                         _editor->begin_reversible_command (Operations::fixed_time_region_copy);
1246                 } else if (!_brushing) {
1247                         _editor->begin_reversible_command (Operations::region_copy);
1248                 } else if (_brushing) {
1249                         _editor->begin_reversible_command (Operations::drag_region_brush);
1250                 }
1251                 /* duplicate the regionview(s) and region(s) */
1252
1253                 list<DraggingView> new_regionviews;
1254
1255                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1256
1257                         RegionView* rv = i->view;
1258                         AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1259                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1260
1261                         const boost::shared_ptr<const Region> original = rv->region();
1262                         boost::shared_ptr<Region> region_copy = RegionFactory::create (original, true);
1263                         region_copy->set_position (original->position());
1264                         /* need to set this so that the drop zone code can work. This doesn't
1265                            actually put the region into the playlist, but just sets a weak pointer
1266                            to it.
1267                         */
1268                         region_copy->set_playlist (original->playlist());
1269
1270                         RegionView* nrv;
1271                         if (arv) {
1272                                 boost::shared_ptr<AudioRegion> audioregion_copy
1273                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1274
1275                                 nrv = new AudioRegionView (*arv, audioregion_copy);
1276                         } else if (mrv) {
1277                                 boost::shared_ptr<MidiRegion> midiregion_copy
1278                                         = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1279                                 nrv = new MidiRegionView (*mrv, midiregion_copy);
1280                         } else {
1281                                 continue;
1282                         }
1283
1284                         nrv->get_canvas_group()->show ();
1285                         new_regionviews.push_back (DraggingView (nrv, this, i->initial_time_axis_view));
1286
1287                         /* swap _primary to the copy */
1288
1289                         if (rv == _primary) {
1290                                 _primary = nrv;
1291                         }
1292
1293                         /* ..and deselect the one we copied */
1294
1295                         rv->set_selected (false);
1296                 }
1297
1298                 if (!new_regionviews.empty()) {
1299
1300                         /* reflect the fact that we are dragging the copies */
1301
1302                         _views = new_regionviews;
1303
1304                         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1305                 }
1306
1307         } else if (!_copy && first_move) {
1308                 if (_x_constrained && !_brushing) {
1309                         _editor->begin_reversible_command (_("fixed time region drag"));
1310                 } else if (!_brushing) {
1311                         _editor->begin_reversible_command (Operations::region_drag);
1312                 } else if (_brushing) {
1313                         _editor->begin_reversible_command (Operations::drag_region_brush);
1314                 }
1315         }
1316         RegionMotionDrag::motion (event, first_move);
1317 }
1318
1319 void
1320 RegionMotionDrag::finished (GdkEvent *, bool)
1321 {
1322         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1323                 if (!(*i)->view()) {
1324                         continue;
1325                 }
1326
1327                 if ((*i)->view()->layer_display() == Expanded) {
1328                         (*i)->view()->set_layer_display (Stacked);
1329                 }
1330         }
1331 }
1332
1333 void
1334 RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
1335 {
1336         RegionMotionDrag::finished (ev, movement_occurred);
1337
1338         if (!movement_occurred) {
1339
1340                 /* just a click */
1341
1342                 if (was_double_click() && !_views.empty()) {
1343                         DraggingView dv = _views.front();
1344                         dv.view->show_region_editor ();
1345
1346                 }
1347
1348                 return;
1349         }
1350
1351         assert (!_views.empty ());
1352
1353         /* We might have hidden region views so that they weren't visible during the drag
1354            (when they have been reparented).  Now everything can be shown again, as region
1355            views are back in their track parent groups.
1356         */
1357         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1358                 i->view->get_canvas_group()->show ();
1359         }
1360
1361         bool const changed_position = (_last_frame_position != _primary->region()->position());
1362         bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
1363         framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
1364
1365         if (_copy) {
1366
1367                 finished_copy (
1368                         changed_position,
1369                         changed_tracks,
1370                         drag_delta
1371                         );
1372
1373         } else {
1374
1375                 finished_no_copy (
1376                         changed_position,
1377                         changed_tracks,
1378                         drag_delta
1379                         );
1380
1381         }
1382
1383         _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
1384 }
1385
1386 RouteTimeAxisView*
1387 RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region, TimeAxisView* original)
1388 {
1389         /* Add a new track of the correct type, and return the RouteTimeAxisView that is created to display the
1390            new track.
1391          */
1392
1393         try {
1394                 if (boost::dynamic_pointer_cast<AudioRegion> (region)) {
1395                         list<boost::shared_ptr<AudioTrack> > audio_tracks;
1396                         uint32_t output_chan = region->n_channels();
1397                         if ((Config->get_output_auto_connect() & AutoConnectMaster) && _editor->session()->master_out()) {
1398                                 output_chan =  _editor->session()->master_out()->n_inputs().n_audio();
1399                         }
1400                         audio_tracks = _editor->session()->new_audio_track (region->n_channels(), output_chan, ARDOUR::Normal, 0, 1, region->name());
1401                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (audio_tracks.front());
1402                         if (rtav) {
1403                                 rtav->set_height (original->current_height());
1404                         }
1405                         return rtav;
1406                 } else {
1407                         ChanCount one_midi_port (DataType::MIDI, 1);
1408                         list<boost::shared_ptr<MidiTrack> > midi_tracks;
1409                         midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port, boost::shared_ptr<ARDOUR::PluginInfo>(), ARDOUR::Normal, 0, 1, region->name());
1410                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (midi_tracks.front());
1411                         if (rtav) {
1412                                 rtav->set_height (original->current_height());
1413                         }
1414                         return rtav;
1415                 }
1416         } catch (...) {
1417                 error << _("Could not create new track after region placed in the drop zone") << endmsg;
1418                 return 0;
1419         }
1420 }
1421
1422 void
1423 RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta)
1424 {
1425         RegionSelection new_views;
1426         PlaylistSet modified_playlists;
1427         RouteTimeAxisView* new_time_axis_view = 0;
1428
1429         if (_brushing) {
1430                 /* all changes were made during motion event handlers */
1431
1432                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1433                         delete i->view;
1434                 }
1435
1436                 _editor->commit_reversible_command ();
1437                 return;
1438         }
1439
1440         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1441         PlaylistMapping playlist_mapping;
1442
1443         /* insert the regions into their new playlists */
1444         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1445
1446                 RouteTimeAxisView* dest_rtv = 0;
1447
1448                 if (i->view->region()->locked() || (i->view->region()->video_locked() && !_ignore_video_lock)) {
1449                         continue;
1450                 }
1451
1452                 framepos_t where;
1453
1454                 if (changed_position && !_x_constrained) {
1455                         where = i->view->region()->position() - drag_delta;
1456                 } else {
1457                         where = i->view->region()->position();
1458                 }
1459
1460                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1461                         /* dragged to drop zone */
1462
1463                         PlaylistMapping::iterator pm;
1464
1465                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1466                                 /* first region from this original playlist: create a new track */
1467                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1468                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1469                                 dest_rtv = new_time_axis_view;
1470                         } else {
1471                                 /* we already created a new track for regions from this playlist, use it */
1472                                 dest_rtv = pm->second;
1473                         }
1474                 } else {
1475                         /* destination time axis view is the one we dragged to */
1476                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1477                 }
1478
1479                 if (dest_rtv != 0) {
1480                         RegionView* new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, modified_playlists);
1481                         if (new_view != 0) {
1482                                 new_views.push_back (new_view);
1483                         }
1484                 }
1485
1486                 /* Delete the copy of the view that was used for dragging. Need to play safe with the iterator
1487                    since deletion will automagically remove it from _views, thus invalidating i as an iterator.
1488                  */
1489
1490                 list<DraggingView>::const_iterator next = i;
1491                 ++next;
1492                 delete i->view;
1493                 i = next;
1494         }
1495
1496         /* If we've created new regions either by copying or moving
1497            to a new track, we want to replace the old selection with the new ones
1498         */
1499
1500         if (new_views.size() > 0) {
1501                 _editor->selection->set (new_views);
1502         }
1503
1504         /* write commands for the accumulated diffs for all our modified playlists */
1505         add_stateful_diff_commands_for_playlists (modified_playlists);
1506
1507         _editor->commit_reversible_command ();
1508 }
1509
1510 void
1511 RegionMoveDrag::finished_no_copy (
1512         bool const changed_position,
1513         bool const changed_tracks,
1514         framecnt_t const drag_delta
1515         )
1516 {
1517         RegionSelection new_views;
1518         PlaylistSet modified_playlists;
1519         PlaylistSet frozen_playlists;
1520         set<RouteTimeAxisView*> views_to_update;
1521         RouteTimeAxisView* new_time_axis_view = 0;
1522
1523         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1524         PlaylistMapping playlist_mapping;
1525
1526         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
1527
1528                 RegionView* rv = i->view;
1529                 RouteTimeAxisView* dest_rtv = 0;
1530
1531                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1532                         ++i;
1533                         continue;
1534                 }
1535
1536                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1537                         /* dragged to drop zone */
1538
1539                         PlaylistMapping::iterator pm;
1540
1541                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1542                                 /* first region from this original playlist: create a new track */
1543                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1544                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1545                                 dest_rtv = new_time_axis_view;
1546                         } else {
1547                                 /* we already created a new track for regions from this playlist, use it */
1548                                 dest_rtv = pm->second;
1549                         }
1550
1551                 } else {
1552                         /* destination time axis view is the one we dragged to */
1553                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1554                 }
1555
1556                 assert (dest_rtv);
1557
1558                 double const dest_layer = i->layer;
1559
1560                 views_to_update.insert (dest_rtv);
1561
1562                 framepos_t where;
1563
1564                 if (changed_position && !_x_constrained) {
1565                         where = rv->region()->position() - drag_delta;
1566                 } else {
1567                         where = rv->region()->position();
1568                 }
1569
1570                 if (changed_tracks) {
1571
1572                         /* insert into new playlist */
1573
1574                         RegionView* new_view = insert_region_into_playlist (
1575                                 RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, modified_playlists
1576                                 );
1577
1578                         if (new_view == 0) {
1579                                 ++i;
1580                                 continue;
1581                         }
1582
1583                         new_views.push_back (new_view);
1584
1585                         /* remove from old playlist */
1586
1587                         /* the region that used to be in the old playlist is not
1588                            moved to the new one - we use a copy of it. as a result,
1589                            any existing editor for the region should no longer be
1590                            visible.
1591                         */
1592                         rv->hide_region_editor();
1593
1594
1595                         remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
1596
1597                 } else {
1598
1599                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1600
1601                         /* this movement may result in a crossfade being modified, or a layering change,
1602                            so we need to get undo data from the playlist as well as the region.
1603                         */
1604
1605                         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (playlist);
1606                         if (r.second) {
1607                                 playlist->clear_changes ();
1608                         }
1609
1610                         rv->region()->clear_changes ();
1611
1612                         /*
1613                            motion on the same track. plonk the previously reparented region
1614                            back to its original canvas group (its streamview).
1615                            No need to do anything for copies as they are fake regions which will be deleted.
1616                         */
1617
1618                         rv->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1619                         rv->get_canvas_group()->set_y_position (i->initial_y);
1620                         rv->drag_end ();
1621
1622                         /* just change the model */
1623                         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1624                                 playlist->set_layer (rv->region(), dest_layer);
1625                         }
1626
1627                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
1628
1629                         r = frozen_playlists.insert (playlist);
1630
1631                         if (r.second) {
1632                                 playlist->freeze ();
1633                         }
1634
1635                         rv->region()->set_position (where);
1636                         _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
1637                 }
1638
1639                 if (changed_tracks) {
1640
1641                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1642                            was selected in all of them, then removing it from a playlist will have removed all
1643                            trace of it from _views (i.e. there were N regions selected, we removed 1,
1644                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1645                            corresponding regionview, and _views is now empty).
1646
1647                            This could have invalidated any and all iterators into _views.
1648
1649                            The heuristic we use here is: if the region selection is empty, break out of the loop
1650                            here. if the region selection is not empty, then restart the loop because we know that
1651                            we must have removed at least the region(view) we've just been working on as well as any
1652                            that we processed on previous iterations.
1653
1654                            EXCEPT .... if we are doing a copy drag, then _views hasn't been modified and
1655                            we can just iterate.
1656                         */
1657
1658
1659                         if (_views.empty()) {
1660                                 break;
1661                         } else {
1662                                 i = _views.begin();
1663                         }
1664
1665                 } else {
1666                         ++i;
1667                 }
1668         }
1669
1670         /* If we've created new regions either by copying or moving
1671            to a new track, we want to replace the old selection with the new ones
1672         */
1673
1674         if (new_views.size() > 0) {
1675                 _editor->selection->set (new_views);
1676         }
1677
1678         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1679                 (*p)->thaw();
1680         }
1681
1682         /* write commands for the accumulated diffs for all our modified playlists */
1683         add_stateful_diff_commands_for_playlists (modified_playlists);
1684         /* applies to _brushing */
1685         _editor->commit_reversible_command ();
1686
1687         /* We have futzed with the layering of canvas items on our streamviews.
1688            If any region changed layer, this will have resulted in the stream
1689            views being asked to set up their region views, and all will be well.
1690            If not, we might now have badly-ordered region views.  Ask the StreamViews
1691            involved to sort themselves out, just in case.
1692         */
1693
1694         for (set<RouteTimeAxisView*>::iterator i = views_to_update.begin(); i != views_to_update.end(); ++i) {
1695                 (*i)->view()->playlist_layered ((*i)->track ());
1696         }
1697 }
1698
1699 /** Remove a region from a playlist, clearing the diff history of the playlist first if necessary.
1700  *  @param region Region to remove.
1701  *  @param playlist playlist To remove from.
1702  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1703  *  that clear_changes () is only called once per playlist.
1704  */
1705 void
1706 RegionMoveDrag::remove_region_from_playlist (
1707         boost::shared_ptr<Region> region,
1708         boost::shared_ptr<Playlist> playlist,
1709         PlaylistSet& modified_playlists
1710         )
1711 {
1712         pair<set<boost::shared_ptr<Playlist> >::iterator, bool> r = modified_playlists.insert (playlist);
1713
1714         if (r.second) {
1715                 playlist->clear_changes ();
1716         }
1717
1718         playlist->remove_region (region); // should be no need to ripple; we better already have rippled the playlist in RegionRippleDrag
1719 }
1720
1721
1722 /** Insert a region into a playlist, handling the recovery of the resulting new RegionView, and
1723  *  clearing the playlist's diff history first if necessary.
1724  *  @param region Region to insert.
1725  *  @param dest_rtv Destination RouteTimeAxisView.
1726  *  @param dest_layer Destination layer.
1727  *  @param where Destination position.
1728  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1729  *  that clear_changes () is only called once per playlist.
1730  *  @return New RegionView, or 0 if no insert was performed.
1731  */
1732 RegionView *
1733 RegionMoveDrag::insert_region_into_playlist (
1734         boost::shared_ptr<Region> region,
1735         RouteTimeAxisView* dest_rtv,
1736         layer_t dest_layer,
1737         framecnt_t where,
1738         PlaylistSet& modified_playlists
1739         )
1740 {
1741         boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
1742         if (!dest_playlist) {
1743                 return 0;
1744         }
1745
1746         /* arrange to collect the new region view that will be created as a result of our playlist insertion */
1747         _new_region_view = 0;
1748         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &RegionMoveDrag::collect_new_region_view));
1749
1750         /* clear history for the playlist we are about to insert to, provided we haven't already done so */
1751         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (dest_playlist);
1752         if (r.second) {
1753                 dest_playlist->clear_changes ();
1754         }
1755
1756         dest_playlist->add_region (region, where);
1757
1758         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1759                 dest_playlist->set_layer (region, dest_layer);
1760         }
1761
1762         c.disconnect ();
1763
1764         assert (_new_region_view);
1765
1766         return _new_region_view;
1767 }
1768
1769 void
1770 RegionMoveDrag::collect_new_region_view (RegionView* rv)
1771 {
1772         _new_region_view = rv;
1773 }
1774
1775 void
1776 RegionMoveDrag::add_stateful_diff_commands_for_playlists (PlaylistSet const & playlists)
1777 {
1778         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1779                 StatefulDiffCommand* c = new StatefulDiffCommand (*i);
1780                 if (!c->empty()) {
1781                         _editor->session()->add_command (c);
1782                 } else {
1783                         delete c;
1784                 }
1785         }
1786 }
1787
1788
1789 void
1790 RegionMoveDrag::aborted (bool movement_occurred)
1791 {
1792         if (_copy) {
1793
1794                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1795                         list<DraggingView>::const_iterator next = i;
1796                         ++next;
1797                         delete i->view;
1798                         i = next;
1799                 }
1800
1801                 _views.clear ();
1802
1803         } else {
1804                 RegionMotionDrag::aborted (movement_occurred);
1805         }
1806 }
1807
1808 void
1809 RegionMotionDrag::aborted (bool)
1810 {
1811         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1812
1813                 StreamView* sview = (*i)->view();
1814
1815                 if (sview) {
1816                         if (sview->layer_display() == Expanded) {
1817                                 sview->set_layer_display (Stacked);
1818                         }
1819                 }
1820         }
1821
1822         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1823                 RegionView* rv = i->view;
1824                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1825                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1826                 assert (rtv);
1827                 rv->get_canvas_group()->reparent (rtv->view()->canvas_item());
1828                 rv->get_canvas_group()->set_y_position (0);
1829                 rv->drag_end ();
1830                 rv->move (-_total_x_delta, 0);
1831                 rv->set_height (rtv->view()->child_height ());
1832         }
1833 }
1834
1835 /** @param b true to brush, otherwise false.
1836  *  @param c true to make copies of the regions being moved, otherwise false.
1837  */
1838 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1839         : RegionMotionDrag (e, i, p, v, b)
1840         , _copy (c)
1841         , _new_region_view (0)
1842 {
1843         DEBUG_TRACE (DEBUG::Drags, "New RegionMoveDrag\n");
1844
1845         double speed = 1;
1846         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&_primary->get_time_axis_view ());
1847         if (rtv && rtv->is_track()) {
1848                 speed = rtv->track()->speed ();
1849         }
1850
1851         _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
1852 }
1853
1854 void
1855 RegionMoveDrag::setup_pointer_frame_offset ()
1856 {
1857         _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
1858 }
1859
1860 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
1861         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1862 {
1863         DEBUG_TRACE (DEBUG::Drags, "New RegionInsertDrag\n");
1864
1865         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1866                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1867
1868         _primary = v->view()->create_region_view (r, false, false);
1869
1870         _primary->get_canvas_group()->show ();
1871         _primary->set_position (pos, 0);
1872         _views.push_back (DraggingView (_primary, this, v));
1873
1874         _last_frame_position = pos;
1875
1876         _item = _primary->get_canvas_group ();
1877 }
1878
1879 void
1880 RegionInsertDrag::finished (GdkEvent *, bool)
1881 {
1882         int pos = _views.front().time_axis_view;
1883         assert(pos >= 0 && pos < (int)_time_axis_views.size());
1884
1885         RouteTimeAxisView* dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[pos]);
1886
1887         _primary->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1888         _primary->get_canvas_group()->set_y_position (0);
1889
1890         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1891
1892         _editor->begin_reversible_command (Operations::insert_region);
1893         playlist->clear_changes ();
1894         playlist->add_region (_primary->region (), _last_frame_position);
1895
1896         // Mixbus doesn't seem to ripple when inserting regions from the list: should we? yes, probably
1897         if (Config->get_edit_mode() == Ripple) {
1898                 playlist->ripple (_last_frame_position, _primary->region()->length(), _primary->region());
1899         }
1900
1901         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1902         _editor->commit_reversible_command ();
1903
1904         delete _primary;
1905         _primary = 0;
1906         _views.clear ();
1907 }
1908
1909 void
1910 RegionInsertDrag::aborted (bool)
1911 {
1912         delete _primary;
1913         _primary = 0;
1914         _views.clear ();
1915 }
1916
1917 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1918         : RegionMoveDrag (e, i, p, v, false, false)
1919 {
1920         DEBUG_TRACE (DEBUG::Drags, "New RegionSpliceDrag\n");
1921 }
1922
1923 struct RegionSelectionByPosition {
1924         bool operator() (RegionView*a, RegionView* b) {
1925                 return a->region()->position () < b->region()->position();
1926         }
1927 };
1928
1929 void
1930 RegionSpliceDrag::motion (GdkEvent* event, bool)
1931 {
1932         /* Which trackview is this ? */
1933
1934         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
1935         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1936
1937         /* The region motion is only processed if the pointer is over
1938            an audio track.
1939         */
1940
1941         if (!tv || !tv->is_track()) {
1942                 /* To make sure we hide the verbose canvas cursor when the mouse is
1943                    not held over an audio track.
1944                 */
1945                 _editor->verbose_cursor()->hide ();
1946                 return;
1947         } else {
1948                 _editor->verbose_cursor()->show ();
1949         }
1950
1951         int dir;
1952
1953         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1954                 dir = 1;
1955         } else {
1956                 dir = -1;
1957         }
1958
1959         RegionSelection copy;
1960         _editor->selection->regions.by_position(copy);
1961
1962         framepos_t const pf = adjusted_current_frame (event);
1963
1964         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1965
1966                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1967
1968                 if (!atv) {
1969                         continue;
1970                 }
1971
1972                 boost::shared_ptr<Playlist> playlist;
1973
1974                 if ((playlist = atv->playlist()) == 0) {
1975                         continue;
1976                 }
1977
1978                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1979                         continue;
1980                 }
1981
1982                 if (dir > 0) {
1983                         if (pf < (*i)->region()->last_frame() + 1) {
1984                                 continue;
1985                         }
1986                 } else {
1987                         if (pf > (*i)->region()->first_frame()) {
1988                                 continue;
1989                         }
1990                 }
1991
1992
1993                 playlist->shuffle ((*i)->region(), dir);
1994         }
1995 }
1996
1997 void
1998 RegionSpliceDrag::finished (GdkEvent* event, bool movement_occurred)
1999 {
2000         RegionMoveDrag::finished (event, movement_occurred);
2001 }
2002
2003 void
2004 RegionSpliceDrag::aborted (bool)
2005 {
2006         /* XXX: TODO */
2007 }
2008
2009 /***
2010  * ripple mode...
2011  */
2012
2013 void
2014 RegionRippleDrag::add_all_after_to_views(TimeAxisView *tav, framepos_t where, const RegionSelection &exclude, bool drag_in_progress)
2015 {
2016
2017         boost::shared_ptr<RegionList> rl = tav->playlist()->regions_with_start_within (Evoral::Range<framepos_t>(where, max_framepos));
2018
2019         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(tav);
2020         RegionSelection to_ripple;
2021         for (RegionList::iterator i = rl->begin(); i != rl->end(); ++i) {
2022                 if ((*i)->position() >= where) {
2023                         to_ripple.push_back (rtv->view()->find_view(*i));
2024                 }
2025         }
2026
2027         for (RegionSelection::iterator i = to_ripple.begin(); i != to_ripple.end(); ++i) {
2028                 if (!exclude.contains (*i)) {
2029                         // the selection has already been added to _views
2030
2031                         if (drag_in_progress) {
2032                                 // do the same things that RegionMotionDrag::motion does when
2033                                 // first_move is true, for the region views that we're adding
2034                                 // to _views this time
2035
2036                                 (*i)->drag_start();
2037                                 ArdourCanvas::Item* rvg = (*i)->get_canvas_group();
2038                                 Duple rv_canvas_offset = rvg->item_to_canvas (Duple (0,0));
2039                                 Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
2040                                 rvg->reparent (_editor->_drag_motion_group);
2041
2042                                 // we only need to move in the y direction
2043                                 Duple fudge = rv_canvas_offset - dmg_canvas_offset;
2044                                 fudge.x = 0;
2045                                 rvg->move (fudge);
2046
2047                         }
2048                         _views.push_back (DraggingView (*i, this, tav));
2049                 }
2050         }
2051 }
2052
2053 void
2054 RegionRippleDrag::remove_unselected_from_views(framecnt_t amount, bool move_regions)
2055 {
2056
2057         for (std::list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ) {
2058                 // we added all the regions after the selection
2059
2060                 std::list<DraggingView>::iterator to_erase = i++;
2061                 if (!_editor->selection->regions.contains (to_erase->view)) {
2062                         // restore the non-selected regions to their original playlist & positions,
2063                         // and then ripple them back by the length of the regions that were dragged away
2064                         // do the same things as RegionMotionDrag::aborted
2065
2066                         RegionView *rv = to_erase->view;
2067                         TimeAxisView* tv = &(rv->get_time_axis_view ());
2068                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
2069                         assert (rtv);
2070
2071                         // plonk them back onto their own track
2072                         rv->get_canvas_group()->reparent(rtv->view()->canvas_item());
2073                         rv->get_canvas_group()->set_y_position (0);
2074                         rv->drag_end ();
2075
2076                         if (move_regions) {
2077                                 // move the underlying region to match the view
2078                                 rv->region()->set_position (rv->region()->position() + amount);
2079                         } else {
2080                                 // restore the view to match the underlying region's original position
2081                                 rv->move(-amount, 0);   // second parameter is y delta - seems 0 is OK
2082                         }
2083
2084                         rv->set_height (rtv->view()->child_height ());
2085                         _views.erase (to_erase);
2086                 }
2087         }
2088 }
2089
2090 bool
2091 RegionRippleDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
2092 {
2093         if (RegionMotionDrag::y_movement_allowed (delta_track, delta_layer, skip_invisible)) {
2094                 if (delta_track) {
2095                         return allow_moves_across_tracks;
2096                 } else {
2097                         return true;
2098                 }
2099         }
2100         return false;
2101 }
2102
2103 RegionRippleDrag::RegionRippleDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2104         : RegionMoveDrag (e, i, p, v, false, false)
2105 {
2106         DEBUG_TRACE (DEBUG::Drags, "New RegionRippleDrag\n");
2107         // compute length of selection
2108         RegionSelection selected_regions = _editor->selection->regions;
2109         selection_length = selected_regions.end_frame() - selected_regions.start();
2110
2111         // we'll only allow dragging to another track in ripple mode if all the regions
2112         // being dragged start off on the same track
2113         allow_moves_across_tracks = (selected_regions.playlists().size() == 1);
2114         prev_tav = NULL;
2115         prev_amount = 0;
2116         exclude = new RegionList;
2117         for (RegionSelection::iterator i =selected_regions.begin(); i != selected_regions.end(); ++i) {
2118                 exclude->push_back((*i)->region());
2119         }
2120
2121         // also add regions before start of selection to exclude, to be consistent with how Mixbus does ripple
2122         RegionSelection copy;
2123         selected_regions.by_position(copy); // get selected regions sorted by position into copy
2124
2125         std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = copy.playlists();
2126         std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2127
2128         for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2129                 // find ripple start point on each applicable playlist
2130                 RegionView *first_selected_on_this_track = NULL;
2131                 for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
2132                         if ((*i)->region()->playlist() == (*pi)) {
2133                                 // region is on this playlist - it's the first, because they're sorted
2134                                 first_selected_on_this_track = *i;
2135                                 break;
2136                         }
2137                 }
2138                 assert (first_selected_on_this_track); // we should always find the region in one of the playlists...
2139                 add_all_after_to_views (
2140                                 &first_selected_on_this_track->get_time_axis_view(),
2141                                 first_selected_on_this_track->region()->position(),
2142                                 selected_regions, false);
2143         }
2144
2145         if (allow_moves_across_tracks) {
2146                 orig_tav = &(*selected_regions.begin())->get_time_axis_view();
2147         } else {
2148                 orig_tav = NULL;
2149         }
2150
2151 }
2152
2153 void
2154 RegionRippleDrag::motion (GdkEvent* event, bool first_move)
2155 {
2156         /* Which trackview is this ? */
2157
2158         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
2159         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
2160
2161         /* The region motion is only processed if the pointer is over
2162            an audio track.
2163          */
2164
2165         if (!tv || !tv->is_track()) {
2166                 /* To make sure we hide the verbose canvas cursor when the mouse is
2167                    not held over an audiotrack.
2168                  */
2169                 _editor->verbose_cursor()->hide ();
2170                 return;
2171         }
2172
2173         framepos_t where = adjusted_current_frame (event);
2174         assert (where >= 0);
2175         framepos_t after;
2176         double delta = compute_x_delta (event, &after);
2177
2178         framecnt_t amount = _editor->pixel_to_sample (delta);
2179
2180         if (allow_moves_across_tracks) {
2181                 // all the originally selected regions were on the same track
2182
2183                 framecnt_t adjust = 0;
2184                 if (prev_tav && tv != prev_tav) {
2185                         // dragged onto a different track
2186                         // remove the unselected regions from _views, restore them to their original positions
2187                         // and add the regions after the drop point on the new playlist to _views instead.
2188                         // undo the effect of rippling the previous playlist, and include the effect of removing
2189                         // the dragged region(s) from this track
2190
2191                         remove_unselected_from_views (prev_amount, false);
2192                         // ripple previous playlist according to the regions that have been removed onto the new playlist
2193                         prev_tav->playlist()->ripple(prev_position, -selection_length, exclude);
2194                         prev_amount = 0;
2195
2196                         // move just the selected regions
2197                         RegionMoveDrag::motion(event, first_move);
2198
2199                         // ensure that the ripple operation on the new playlist inserts selection_length time
2200                         adjust = selection_length;
2201                         // ripple the new current playlist
2202                         tv->playlist()->ripple (where, amount+adjust, exclude);
2203
2204                         // add regions after point where drag entered this track to subsequent ripples
2205                         add_all_after_to_views (tv, where, _editor->selection->regions, true);
2206
2207                 } else {
2208                         // motion on same track
2209                         RegionMoveDrag::motion(event, first_move);
2210                 }
2211                 prev_tav = tv;
2212
2213                 // remember what we've done to this playlist so we can undo it if the selection is dragged to another track
2214                 prev_position = where;
2215         } else {
2216                 // selection encompasses multiple tracks - just drag
2217                 // cross-track drags are forbidden
2218                 RegionMoveDrag::motion(event, first_move);
2219         }
2220
2221         if (!_x_constrained) {
2222                 prev_amount += amount;
2223         }
2224
2225         _last_frame_position = after;
2226 }
2227
2228 void
2229 RegionRippleDrag::finished (GdkEvent* event, bool movement_occurred)
2230 {
2231         if (!movement_occurred) {
2232
2233                 /* just a click */
2234
2235                 if (was_double_click() && !_views.empty()) {
2236                         DraggingView dv = _views.front();
2237                         dv.view->show_region_editor ();
2238
2239                 }
2240
2241                 return;
2242         }
2243
2244         _editor->begin_reversible_command(_("Ripple drag"));
2245
2246         // remove the regions being rippled from the dragging view, updating them to
2247         // their new positions
2248         remove_unselected_from_views (prev_amount, true);
2249
2250         if (allow_moves_across_tracks) {
2251                 if (orig_tav) {
2252                         // if regions were dragged across tracks, we've rippled any later
2253                         // regions on the track the regions were dragged off, so we need
2254                         // to add the original track to the undo record
2255                         orig_tav->playlist()->clear_changes();
2256                         vector<Command*> cmds;
2257                         orig_tav->playlist()->rdiff (cmds);
2258                         _editor->session()->add_commands (cmds);
2259                 }
2260                 if (prev_tav && prev_tav != orig_tav) {
2261                         prev_tav->playlist()->clear_changes();
2262                         vector<Command*> cmds;
2263                         prev_tav->playlist()->rdiff (cmds);
2264                         _editor->session()->add_commands (cmds);
2265                 }
2266         } else {
2267                 // selection spanned multiple tracks - all will need adding to undo record
2268
2269                 std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = _editor->selection->regions.playlists();
2270                 std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2271
2272                 for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2273                         (*pi)->clear_changes();
2274                         vector<Command*> cmds;
2275                         (*pi)->rdiff (cmds);
2276                         _editor->session()->add_commands (cmds);
2277                 }
2278         }
2279
2280         // other modified playlists are added to undo by RegionMoveDrag::finished()
2281         RegionMoveDrag::finished (event, movement_occurred);
2282         _editor->commit_reversible_command();
2283 }
2284
2285 void
2286 RegionRippleDrag::aborted (bool movement_occurred)
2287 {
2288         RegionMoveDrag::aborted (movement_occurred);
2289         _views.clear ();
2290 }
2291
2292
2293 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
2294         : Drag (e, i),
2295           _view (dynamic_cast<MidiTimeAxisView*> (v))
2296 {
2297         DEBUG_TRACE (DEBUG::Drags, "New RegionCreateDrag\n");
2298
2299         assert (_view);
2300 }
2301
2302 void
2303 RegionCreateDrag::motion (GdkEvent* event, bool first_move)
2304 {
2305         if (first_move) {
2306                 _editor->begin_reversible_command (_("create region"));
2307                 _region = add_midi_region (_view, false);
2308                 _view->playlist()->freeze ();
2309         } else {
2310                 if (_region) {
2311                         framepos_t const f = adjusted_current_frame (event);
2312                         if (f < grab_frame()) {
2313                                 _region->set_initial_position (f);
2314                         }
2315
2316                         /* Don't use a zero-length region, and subtract 1 frame from the snapped length
2317                            so that if this region is duplicated, its duplicate starts on
2318                            a snap point rather than 1 frame after a snap point.  Otherwise things get
2319                            a bit confusing as if a region starts 1 frame after a snap point, one cannot
2320                            place snapped notes at the start of the region.
2321                         */
2322
2323                         framecnt_t const len = (framecnt_t) fabs ((double)(f - grab_frame () - 1));
2324                         _region->set_length (len < 1 ? 1 : len);
2325                 }
2326         }
2327 }
2328
2329 void
2330 RegionCreateDrag::finished (GdkEvent*, bool movement_occurred)
2331 {
2332         if (!movement_occurred) {
2333                 add_midi_region (_view, true);
2334         } else {
2335                 _view->playlist()->thaw ();
2336                 _editor->commit_reversible_command();
2337         }
2338 }
2339
2340 void
2341 RegionCreateDrag::aborted (bool)
2342 {
2343         if (_region) {
2344                 _view->playlist()->thaw ();
2345         }
2346
2347         /* XXX */
2348 }
2349
2350 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
2351         : Drag (e, i)
2352         , region (0)
2353         , relative (false)
2354         , at_front (true)
2355         , _was_selected (false)
2356         , _snap_delta (0)
2357 {
2358         DEBUG_TRACE (DEBUG::Drags, "New NoteResizeDrag\n");
2359 }
2360
2361 void
2362 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
2363 {
2364         Gdk::Cursor* cursor;
2365         NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2366         assert (cnote);
2367         float x_fraction = cnote->mouse_x_fraction ();
2368
2369         if (x_fraction > 0.0 && x_fraction < 0.25) {
2370                 cursor = _editor->cursors()->left_side_trim;
2371                 at_front = true;
2372         } else  {
2373                 cursor = _editor->cursors()->right_side_trim;
2374                 at_front = false;
2375         }
2376
2377         Drag::start_grab (event, cursor);
2378
2379         region = &cnote->region_view();
2380
2381         double temp;
2382         temp = region->snap_to_pixel (cnote->x0 (), true);
2383         _snap_delta = temp - cnote->x0 ();
2384
2385         _item->grab ();
2386
2387         if (event->motion.state & ArdourKeyboard::note_size_relative_modifier ()) {
2388                 relative = false;
2389         } else {
2390                 relative = true;
2391         }
2392         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2393         if (ms.size() > 1) {
2394                 /* has to be relative, may make no sense otherwise */
2395                 relative = true;
2396         }
2397
2398         if (!(_was_selected = cnote->selected())) {
2399
2400                 /* tertiary-click means extend selection - we'll do that on button release,
2401                    so don't add it here, because otherwise we make it hard to figure
2402                    out the "extend-to" range.
2403                 */
2404
2405                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2406
2407                 if (!extend) {
2408                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2409
2410                         if (add) {
2411                                 region->note_selected (cnote, true);
2412                         } else {
2413                                 _editor->get_selection().clear_points();
2414                                 region->unique_select (cnote);
2415                         }
2416                 }
2417         }
2418 }
2419
2420 void
2421 NoteResizeDrag::motion (GdkEvent* event, bool first_move)
2422 {
2423         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2424         if (first_move) {
2425                 _editor->begin_reversible_command (_("resize notes"));
2426
2427                 for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
2428                         MidiRegionSelection::iterator next;
2429                         next = r;
2430                         ++next;
2431                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2432                         if (mrv) {
2433                                 mrv->begin_resizing (at_front);
2434                         }
2435                         r = next;
2436                 }
2437         }
2438
2439         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2440                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2441                 assert (nb);
2442                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2443                 if (mrv) {
2444                         double sd = 0.0;
2445                         bool snap = true;
2446                         bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2447
2448                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2449                                 if (_editor->snap_mode () != SnapOff) {
2450                                         snap = false;
2451                                 }
2452                         } else {
2453                                 if (_editor->snap_mode () == SnapOff) {
2454                                         snap = false;
2455                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2456                                         if (apply_snap_delta) {
2457                                                 snap = true;
2458                                         }
2459                                 }
2460                         }
2461
2462                         if (apply_snap_delta) {
2463                                 sd = _snap_delta;
2464                         }
2465
2466                         mrv->update_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2467                 }
2468         }
2469 }
2470
2471 void
2472 NoteResizeDrag::finished (GdkEvent* event, bool movement_occurred)
2473 {
2474         if (!movement_occurred) {
2475                 /* no motion - select note */
2476                 NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2477                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
2478                     _editor->current_mouse_mode() == Editing::MouseDraw) {
2479
2480                         bool changed = false;
2481
2482                         if (_was_selected) {
2483                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2484                                 if (add) {
2485                                         region->note_deselected (cnote);
2486                                         changed = true;
2487                                 } else {
2488                                         _editor->get_selection().clear_points();
2489                                         region->unique_select (cnote);
2490                                         changed = true;
2491                                 }
2492                         } else {
2493                                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2494                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2495
2496                                 if (!extend && !add && region->selection_size() > 1) {
2497                                         _editor->get_selection().clear_points();
2498                                         region->unique_select (cnote);
2499                                         changed = true;
2500                                 } else if (extend) {
2501                                         region->note_selected (cnote, true, true);
2502                                         changed = true;
2503                                 } else {
2504                                         /* it was added during button press */
2505                                         changed = true;
2506                                 }
2507                         }
2508
2509                         if (changed) {
2510                                 _editor->begin_reversible_selection_op(X_("Resize Select Note Release"));
2511                                 _editor->commit_reversible_selection_op();
2512                         }
2513                 }
2514
2515                 return;
2516         }
2517
2518         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2519         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2520                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2521                 assert (nb);
2522                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2523                 double sd = 0.0;
2524                 bool snap = true;
2525                 bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2526                 if (mrv) {
2527                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2528                                 if (_editor->snap_mode () != SnapOff) {
2529                                         snap = false;
2530                                 }
2531                         } else {
2532                                 if (_editor->snap_mode () == SnapOff) {
2533                                         snap = false;
2534                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2535                                         if (apply_snap_delta) {
2536                                                 snap = true;
2537                                         }
2538                                 }
2539                         }
2540
2541                         if (apply_snap_delta) {
2542                                 sd = _snap_delta;
2543                         }
2544
2545                         mrv->commit_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2546                 }
2547         }
2548
2549         _editor->commit_reversible_command ();
2550 }
2551
2552 void
2553 NoteResizeDrag::aborted (bool)
2554 {
2555         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2556         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2557                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2558                 if (mrv) {
2559                         mrv->abort_resizing ();
2560                 }
2561         }
2562 }
2563
2564 AVDraggingView::AVDraggingView (RegionView* v)
2565         : view (v)
2566 {
2567         initial_position = v->region()->position ();
2568 }
2569
2570 VideoTimeLineDrag::VideoTimeLineDrag (Editor* e, ArdourCanvas::Item* i)
2571         : Drag (e, i)
2572 {
2573         DEBUG_TRACE (DEBUG::Drags, "New VideoTimeLineDrag\n");
2574
2575         RegionSelection rs;
2576         TrackViewList empty;
2577         empty.clear();
2578         _editor->get_regions_after(rs, (framepos_t) 0, empty);
2579         std::list<RegionView*> views = rs.by_layer();
2580
2581         _stuck = false;
2582         for (list<RegionView*>::iterator i = views.begin(); i != views.end(); ++i) {
2583                 RegionView* rv = (*i);
2584                 if (!rv->region()->video_locked()) {
2585                         continue;
2586                 }
2587                 if (rv->region()->locked()) {
2588                         _stuck = true;
2589                 }
2590                 _views.push_back (AVDraggingView (rv));
2591         }
2592 }
2593
2594 void
2595 VideoTimeLineDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2596 {
2597         Drag::start_grab (event);
2598         if (_editor->session() == 0) {
2599                 return;
2600         }
2601
2602         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
2603                 _stuck = false;
2604                 _views.clear();
2605         }
2606
2607         if (_stuck) {
2608                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2609                 return;
2610         }
2611
2612         _startdrag_video_offset=ARDOUR_UI::instance()->video_timeline->get_offset();
2613         _max_backwards_drag = (
2614                           ARDOUR_UI::instance()->video_timeline->get_duration()
2615                         + ARDOUR_UI::instance()->video_timeline->get_offset()
2616                         - ceil(ARDOUR_UI::instance()->video_timeline->get_apv())
2617                         );
2618
2619         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2620                 if (i->initial_position < _max_backwards_drag || _max_backwards_drag < 0) {
2621                         _max_backwards_drag = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv (i->initial_position);
2622                 }
2623         }
2624         DEBUG_TRACE (DEBUG::Drags, string_compose("VideoTimeLineDrag: max backwards-drag: %1\n", _max_backwards_drag));
2625
2626         char buf[128];
2627         Timecode::Time timecode;
2628         _editor->session()->sample_to_timecode(abs(_startdrag_video_offset), timecode, true /* use_offset */, false /* use_subframes */ );
2629         snprintf (buf, sizeof (buf), "Video Start:\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, (_startdrag_video_offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
2630         show_verbose_cursor_text (buf);
2631 }
2632
2633 void
2634 VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
2635 {
2636         if (_editor->session() == 0) {
2637                 return;
2638         }
2639         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2640                 return;
2641         }
2642         if (_stuck) {
2643                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2644                 return;
2645         }
2646
2647         framecnt_t dt = adjusted_current_frame (event) - raw_grab_frame() + _pointer_frame_offset;
2648         dt = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv(_startdrag_video_offset+dt) - _startdrag_video_offset;
2649
2650         if (_max_backwards_drag >= 0 && dt <= - _max_backwards_drag) {
2651                 dt = - _max_backwards_drag;
2652         }
2653
2654         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset+dt);
2655         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2656
2657         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2658                 RegionView* rv = i->view;
2659                 DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
2660                 if (first_move) {
2661                         rv->drag_start ();
2662                         rv->region()->clear_changes ();
2663                         rv->region()->suspend_property_changes();
2664                 }
2665                 rv->region()->set_position(i->initial_position + dt);
2666                 rv->region_changed(ARDOUR::Properties::position);
2667         }
2668
2669         const framepos_t offset = ARDOUR_UI::instance()->video_timeline->get_offset();
2670         Timecode::Time timecode;
2671         Timecode::Time timediff;
2672         char buf[128];
2673         _editor->session()->sample_to_timecode(abs(offset), timecode, true /* use_offset */, false /* use_subframes */ );
2674         _editor->session()->sample_to_timecode(abs(dt), timediff, false /* use_offset */, false /* use_subframes */ );
2675         snprintf (buf, sizeof (buf),
2676                         "%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2677                         "\n%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2678                         , _("Video Start:"),
2679                                 (offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames
2680                         , _("Diff:"),
2681                                 (dt<0?'-':' '), timediff.hours, timediff.minutes, timediff.seconds, timediff.frames
2682                                 );
2683         show_verbose_cursor_text (buf);
2684 }
2685
2686 void
2687 VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
2688 {
2689         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2690                 return;
2691         }
2692         if (_stuck) {
2693                 return;
2694         }
2695
2696         if (!movement_occurred || ! _editor->session()) {
2697                 return;
2698         }
2699
2700         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2701
2702         _editor->begin_reversible_command (_("Move Video"));
2703
2704         XMLNode &before = ARDOUR_UI::instance()->video_timeline->get_state();
2705         ARDOUR_UI::instance()->video_timeline->save_undo();
2706         XMLNode &after = ARDOUR_UI::instance()->video_timeline->get_state();
2707         _editor->session()->add_command(new MementoCommand<VideoTimeLine>(*(ARDOUR_UI::instance()->video_timeline), &before, &after));
2708
2709         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2710                 i->view->drag_end();
2711                 i->view->region()->resume_property_changes ();
2712
2713                 _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
2714         }
2715
2716         _editor->session()->maybe_update_session_range(
2717                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset(), (ARDOUR::frameoffset_t) 0),
2718                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset() + ARDOUR_UI::instance()->video_timeline->get_duration(), (ARDOUR::frameoffset_t) 0)
2719                         );
2720
2721
2722         _editor->commit_reversible_command ();
2723 }
2724
2725 void
2726 VideoTimeLineDrag::aborted (bool)
2727 {
2728         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2729                 return;
2730         }
2731         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset);
2732         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2733
2734         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2735                 i->view->region()->resume_property_changes ();
2736                 i->view->region()->set_position(i->initial_position);
2737         }
2738 }
2739
2740 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool preserve_fade_anchor)
2741         : RegionDrag (e, i, p, v)
2742         , _operation (StartTrim)
2743         , _preserve_fade_anchor (preserve_fade_anchor)
2744         , _jump_position_when_done (false)
2745 {
2746         DEBUG_TRACE (DEBUG::Drags, "New TrimDrag\n");
2747 }
2748
2749 void
2750 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2751 {
2752         double speed = 1.0;
2753         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2754         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2755
2756         if (tv && tv->is_track()) {
2757                 speed = tv->track()->speed();
2758         }
2759
2760         framepos_t const region_start = (framepos_t) (_primary->region()->position() / speed);
2761         framepos_t const region_end = (framepos_t) (_primary->region()->last_frame() / speed);
2762         framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
2763
2764         framepos_t const pf = adjusted_current_frame (event);
2765         setup_snap_delta (region_start);
2766
2767         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_contents_modifier ())) {
2768                 /* Move the contents of the region around without changing the region bounds */
2769                 _operation = ContentsTrim;
2770                 Drag::start_grab (event, _editor->cursors()->trimmer);
2771         } else {
2772                 /* These will get overridden for a point trim.*/
2773                 if (pf < (region_start + region_length/2)) {
2774                         /* closer to front */
2775                         _operation = StartTrim;
2776                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2777                                 Drag::start_grab (event, _editor->cursors()->anchored_left_side_trim);
2778                         } else {
2779                                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
2780                         }
2781                 } else {
2782                         /* closer to end */
2783                         _operation = EndTrim;
2784                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2785                                 Drag::start_grab (event, _editor->cursors()->anchored_right_side_trim);
2786                         } else {
2787                                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
2788                         }
2789                 }
2790         }
2791         /* jump trim disabled for now
2792         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::trim_jump_modifier ())) {
2793                 _jump_position_when_done = true;
2794         }
2795         */
2796
2797         switch (_operation) {
2798         case StartTrim:
2799                 show_verbose_cursor_time (region_start);
2800                 break;
2801         case EndTrim:
2802                 show_verbose_cursor_duration (region_start, region_end);
2803                 break;
2804         case ContentsTrim:
2805                 show_verbose_cursor_time (pf);
2806                 break;
2807         }
2808
2809         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2810                 i->view->region()->suspend_property_changes ();
2811         }
2812 }
2813
2814 void
2815 TrimDrag::motion (GdkEvent* event, bool first_move)
2816 {
2817         RegionView* rv = _primary;
2818
2819         double speed = 1.0;
2820         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2821         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2822         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
2823         frameoffset_t frame_delta = 0;
2824
2825         if (tv && tv->is_track()) {
2826                 speed = tv->track()->speed();
2827         }
2828         framecnt_t adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
2829         framecnt_t dt = adj_frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
2830
2831         if (first_move) {
2832
2833                 string trim_type;
2834
2835                 switch (_operation) {
2836                 case StartTrim:
2837                         trim_type = "Region start trim";
2838                         break;
2839                 case EndTrim:
2840                         trim_type = "Region end trim";
2841                         break;
2842                 case ContentsTrim:
2843                         trim_type = "Region content trim";
2844                         break;
2845                 default:
2846                         assert(0);
2847                         break;
2848                 }
2849
2850                 _editor->begin_reversible_command (trim_type);
2851
2852                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2853                         RegionView* rv = i->view;
2854                         rv->enable_display (false);
2855                         rv->region()->playlist()->clear_owned_changes ();
2856
2857                         if (_operation == StartTrim) {
2858                                 rv->trim_front_starting ();
2859                         }
2860
2861                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
2862
2863                         if (arv) {
2864                                 arv->temporarily_hide_envelope ();
2865                                 arv->drag_start ();
2866                         }
2867
2868                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
2869                         insert_result = _editor->motion_frozen_playlists.insert (pl);
2870
2871                         if (insert_result.second) {
2872                                 pl->freeze();
2873                         }
2874                 }
2875         }
2876
2877         bool non_overlap_trim = false;
2878
2879         if (event && Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::trim_overlap_modifier ())) {
2880                 non_overlap_trim = true;
2881         }
2882
2883         /* contstrain trim to fade length */
2884         if (_preserve_fade_anchor) {
2885                 switch (_operation) {
2886                         case StartTrim:
2887                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2888                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2889                                         if (!arv) continue;
2890                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2891                                         if (ar->locked()) continue;
2892                                         framecnt_t len = ar->fade_in()->back()->when;
2893                                         if (len < dt) dt = min(dt, len);
2894                                 }
2895                                 break;
2896                         case EndTrim:
2897                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2898                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2899                                         if (!arv) continue;
2900                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2901                                         if (ar->locked()) continue;
2902                                         framecnt_t len = ar->fade_out()->back()->when;
2903                                         if (len < -dt) dt = max(dt, -len);
2904                                 }
2905                                 break;
2906                         case ContentsTrim:
2907                                 break;
2908                 }
2909         }
2910
2911
2912         switch (_operation) {
2913         case StartTrim:
2914                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2915                         bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim);
2916                         if (changed && _preserve_fade_anchor) {
2917                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2918                                 if (arv) {
2919                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2920                                         framecnt_t len = ar->fade_in()->back()->when;
2921                                         framecnt_t diff = ar->first_frame() - i->initial_position;
2922                                         framepos_t new_length = len - diff;
2923                                         i->anchored_fade_length = min (ar->length(), new_length);
2924                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
2925                                         arv->reset_fade_in_shape_width (ar, i->anchored_fade_length, true);
2926                                 }
2927                         }
2928                 }
2929                 break;
2930
2931         case EndTrim:
2932                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2933                         bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim);
2934                         if (changed && _preserve_fade_anchor) {
2935                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2936                                 if (arv) {
2937                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2938                                         framecnt_t len = ar->fade_out()->back()->when;
2939                                         framecnt_t diff = 1 + ar->last_frame() - i->initial_end;
2940                                         framepos_t new_length = len + diff;
2941                                         i->anchored_fade_length = min (ar->length(), new_length);
2942                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
2943                                         arv->reset_fade_out_shape_width (ar, i->anchored_fade_length, true);
2944                                 }
2945                         }
2946                 }
2947                 break;
2948
2949         case ContentsTrim:
2950                 {
2951                         frame_delta = (last_pointer_frame() - adjusted_current_frame(event));
2952
2953                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2954                                 i->view->move_contents (frame_delta);
2955                         }
2956                 }
2957                 break;
2958         }
2959
2960         switch (_operation) {
2961         case StartTrim:
2962                 show_verbose_cursor_time ((framepos_t) (rv->region()->position() / speed));
2963                 break;
2964         case EndTrim:
2965                 show_verbose_cursor_duration ((framepos_t)  rv->region()->position() / speed, (framepos_t) rv->region()->last_frame() / speed);
2966                 break;
2967         case ContentsTrim:
2968                 // show_verbose_cursor_time (frame_delta);
2969                 break;
2970         }
2971 }
2972
2973 void
2974 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
2975 {
2976         if (movement_occurred) {
2977                 motion (event, false);
2978
2979                 if (_operation == StartTrim) {
2980                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2981                                 {
2982                                         /* This must happen before the region's StatefulDiffCommand is created, as it may
2983                                            `correct' (ahem) the region's _start from being negative to being zero.  It
2984                                            needs to be zero in the undo record.
2985                                         */
2986                                         i->view->trim_front_ending ();
2987                                 }
2988                                 if (_preserve_fade_anchor) {
2989                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2990                                         if (arv) {
2991                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2992                                                 arv->reset_fade_in_shape_width (ar, i->anchored_fade_length);
2993                                                 ar->set_fade_in_length(i->anchored_fade_length);
2994                                                 ar->set_fade_in_active(true);
2995                                         }
2996                                 }
2997                                 if (_jump_position_when_done) {
2998                                         i->view->region()->set_position (i->initial_position);
2999                                 }
3000                         }
3001                 } else if (_operation == EndTrim) {
3002                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3003                                 if (_preserve_fade_anchor) {
3004                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
3005                                         if (arv) {
3006                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
3007                                                 arv->reset_fade_out_shape_width (ar, i->anchored_fade_length);
3008                                                 ar->set_fade_out_length(i->anchored_fade_length);
3009                                                 ar->set_fade_out_active(true);
3010                                         }
3011                                 }
3012                                 if (_jump_position_when_done) {
3013                                         i->view->region()->set_position (i->initial_end - i->view->region()->length());
3014                                 }
3015                         }
3016                 }
3017
3018                 if (!_views.empty()) {
3019                         if (_operation == StartTrim) {
3020                                 _editor->maybe_locate_with_edit_preroll(
3021                                         _views.begin()->view->region()->position());
3022                         }
3023                         if (_operation == EndTrim) {
3024                                 _editor->maybe_locate_with_edit_preroll(
3025                                         _views.begin()->view->region()->position() +
3026                                         _views.begin()->view->region()->length());
3027                         }
3028                 }
3029
3030                 if (!_editor->selection->selected (_primary)) {
3031                         _primary->thaw_after_trim ();
3032                 } else {
3033
3034                         set<boost::shared_ptr<Playlist> > diffed_playlists;
3035
3036                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3037                                 i->view->thaw_after_trim ();
3038                                 i->view->enable_display (true);
3039
3040                                 /* Trimming one region may affect others on the playlist, so we need
3041                                    to get undo Commands from the whole playlist rather than just the
3042                                    region.  Use diffed_playlists to make sure we don't diff a given
3043                                    playlist more than once.
3044                                 */
3045                                 boost::shared_ptr<Playlist> p = i->view->region()->playlist ();
3046                                 if (diffed_playlists.find (p) == diffed_playlists.end()) {
3047                                         vector<Command*> cmds;
3048                                         p->rdiff (cmds);
3049                                         _editor->session()->add_commands (cmds);
3050                                         diffed_playlists.insert (p);
3051                                 }
3052                         }
3053                 }
3054
3055                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
3056                         (*p)->thaw ();
3057                 }
3058
3059                 _editor->motion_frozen_playlists.clear ();
3060                 _editor->commit_reversible_command();
3061
3062         } else {
3063                 /* no mouse movement */
3064                 if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false)) {
3065                         _editor->point_trim (event, adjusted_current_frame (event));
3066                 }
3067         }
3068
3069         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3070                 i->view->region()->resume_property_changes ();
3071         }
3072 }
3073
3074 void
3075 TrimDrag::aborted (bool movement_occurred)
3076 {
3077         /* Our motion method is changing model state, so use the Undo system
3078            to cancel.  Perhaps not ideal, as this will leave an Undo point
3079            behind which may be slightly odd from the user's point of view.
3080         */
3081
3082         finished (0, true);
3083
3084         if (movement_occurred) {
3085                 _editor->undo ();
3086         }
3087
3088         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3089                 i->view->region()->resume_property_changes ();
3090         }
3091 }
3092
3093 void
3094 TrimDrag::setup_pointer_frame_offset ()
3095 {
3096         list<DraggingView>::iterator i = _views.begin ();
3097         while (i != _views.end() && i->view != _primary) {
3098                 ++i;
3099         }
3100
3101         if (i == _views.end()) {
3102                 return;
3103         }
3104
3105         switch (_operation) {
3106         case StartTrim:
3107                 _pointer_frame_offset = raw_grab_frame() - i->initial_position;
3108                 break;
3109         case EndTrim:
3110                 _pointer_frame_offset = raw_grab_frame() - i->initial_end;
3111                 break;
3112         case ContentsTrim:
3113                 break;
3114         }
3115 }
3116
3117 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3118         : Drag (e, i),
3119           _copy (c)
3120         , before_state (0)
3121 {
3122         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3123         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3124         assert (_marker);
3125         _real_section = &_marker->meter();
3126
3127 }
3128
3129 void
3130 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3131 {
3132         Drag::start_grab (event, cursor);
3133         show_verbose_cursor_time (adjusted_current_frame(event));
3134 }
3135
3136 void
3137 MeterMarkerDrag::setup_pointer_frame_offset ()
3138 {
3139         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3140 }
3141
3142 void
3143 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3144 {
3145         if (first_move) {
3146
3147                 // create a dummy marker to catch events, then hide it.
3148
3149                 char name[64];
3150                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3151
3152                 _marker = new MeterMarker (
3153                         *_editor,
3154                         *_editor->meter_group,
3155                         UIConfiguration::instance().color ("meter marker"),
3156                         name,
3157                         *new MeterSection (_marker->meter())
3158                 );
3159
3160                 /* use the new marker for the grab */
3161                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3162                 _marker->hide();
3163
3164                 TempoMap& map (_editor->session()->tempo_map());
3165                 /* get current state */
3166                 before_state = &map.get_state();
3167
3168                 if (!_copy) {
3169                         _editor->begin_reversible_command (_("move meter mark"));
3170                 } else {
3171                         _editor->begin_reversible_command (_("copy meter mark"));
3172
3173                         Timecode::BBT_Time bbt = _real_section->bbt();
3174
3175                         /* we can't add a meter where one currently exists */
3176                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3177                                 ++bbt.bars;
3178                         } else {
3179                                 --bbt.bars;
3180                         }
3181                         const double beat = map.bbt_to_beats (bbt);
3182                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3183                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3184
3185                 }
3186         }
3187
3188         framepos_t const pf = adjusted_current_frame (event, false);
3189         if (_marker->meter().position_lock_style() == MusicTime) {
3190                 TempoMap& map (_editor->session()->tempo_map());
3191                 Timecode::BBT_Time bbt;
3192                 map.bbt_time (pf, bbt);
3193                 /* round bbt to bars */
3194                 map.round_bbt (bbt, -1, RoundNearest);
3195
3196                 if ((bbt.bars != _real_section->bbt().bars && pf > last_pointer_frame())
3197                     || (bbt.bars < _real_section->bbt().bars && pf < last_pointer_frame())) {
3198
3199                         /* move meter beat-based */
3200                         _editor->session()->tempo_map().gui_move_meter_bbt (_real_section, bbt);
3201                 }
3202         } else {
3203                 /* AudioTime */
3204                 /* move meter frame-based */
3205                 _editor->session()->tempo_map().gui_move_meter_frame (_real_section, pf);
3206         }
3207         _marker->set_position (pf);
3208         show_verbose_cursor_time (_real_section->frame());
3209 }
3210
3211 void
3212 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3213 {
3214         if (!movement_occurred) {
3215                 if (was_double_click()) {
3216                         _editor->edit_meter_marker (*_marker);
3217                 }
3218                 return;
3219         }
3220
3221         TempoMap& map (_editor->session()->tempo_map());
3222
3223         XMLNode &after = map.get_state();
3224         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3225         _editor->commit_reversible_command ();
3226
3227         // delete the dummy marker we used for visual representation while moving.
3228         // a new visual marker will show up automatically.
3229         delete _marker;
3230 }
3231
3232 void
3233 MeterMarkerDrag::aborted (bool moved)
3234 {
3235         _marker->set_position (_marker->meter().frame ());
3236         if (moved) {
3237                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3238                 // delete the dummy marker we used for visual representation while moving.
3239                 // a new visual marker will show up automatically.
3240                 delete _marker;
3241         }
3242 }
3243
3244 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3245         : Drag (e, i)
3246         , _copy (c)
3247         , before_state (0)
3248 {
3249         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3250
3251         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3252         _real_section = &_marker->tempo();
3253         _movable = _real_section->movable();
3254         assert (_marker);
3255 }
3256
3257 void
3258 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3259 {
3260         Drag::start_grab (event, cursor);
3261         if (!_real_section->active()) {
3262                 show_verbose_cursor_text (_("inactive"));
3263         } else {
3264                 show_verbose_cursor_time (adjusted_current_frame (event));
3265         }
3266 }
3267
3268 void
3269 TempoMarkerDrag::setup_pointer_frame_offset ()
3270 {
3271         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3272 }
3273
3274 void
3275 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3276 {
3277         if (!_real_section->active()) {
3278                 return;
3279         }
3280
3281         if (first_move) {
3282
3283                 // mvc drag - create a dummy marker to catch events, hide it.
3284
3285                 char name[64];
3286                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3287
3288                 TempoSection section (_marker->tempo());
3289
3290                 _marker = new TempoMarker (
3291                         *_editor,
3292                         *_editor->tempo_group,
3293                         UIConfiguration::instance().color ("tempo marker"),
3294                         name,
3295                         *new TempoSection (_marker->tempo())
3296                         );
3297
3298                 /* use the new marker for the grab */
3299                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3300                 _marker->hide();
3301
3302                 TempoMap& map (_editor->session()->tempo_map());
3303                 /* get current state */
3304                 before_state = &map.get_state();
3305                 if (!_copy) {
3306                         _editor->begin_reversible_command (_("move tempo mark"));
3307                 } else {
3308                         _editor->begin_reversible_command (_("copy tempo mark"));
3309                         framepos_t frame;
3310                         bool use_snap = false;
3311
3312                         if (!_editor->snap_musical()) {
3313                                 frame = adjusted_current_frame (event);
3314                         } else {
3315                                 frame = adjusted_current_frame (event, false);
3316                                 if (ArdourKeyboard::indicates_snap (event->button.state)) {
3317                                         if (_editor->snap_mode() == Editing::SnapOff) {
3318                                                 use_snap = true;
3319                                         } else {
3320                                                 use_snap = false;
3321                                         }
3322                                 } else {
3323                                         if (_editor->snap_mode() == Editing::SnapOff) {
3324                                                 use_snap = false;
3325                                         } else {
3326                                                 use_snap = true;
3327                                         }
3328                                 }
3329                         }
3330
3331                         Timecode::BBT_Time bbt;
3332                         map.bbt_time (frame, bbt);
3333
3334                         /* add new tempo section to map, ensuring we don't refer to existing tempos for snap */
3335
3336                         if (_real_section->position_lock_style() == MusicTime) {
3337                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3338                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3339                                 } else if (use_snap) {
3340                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3341                                 }
3342                                 double const pulse = map.predict_tempo_pulse (_real_section, bbt);
3343                                 _real_section = map.add_tempo (_marker->tempo(), pulse, 0, _real_section->type(), MusicTime);
3344                         } else {
3345                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3346                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3347                                 } else if (use_snap) {
3348                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3349                                 }
3350                                 if (use_snap) {
3351                                         frame = map.predict_tempo_frame (_real_section, bbt);
3352                                 }
3353                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3354                         }
3355                 }
3356
3357         }
3358
3359         framepos_t pf;
3360
3361         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3362                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3363                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3364                 stringstream strs;
3365                 strs << new_bpm;
3366                 show_verbose_cursor_text (strs.str());
3367         } else if (_movable && !_real_section->locked_to_meter()) {
3368                 if (!_editor->snap_musical()) {
3369                         /* snap normally (this is not self-referential).*/
3370                         pf = adjusted_current_frame (event);
3371                 } else {
3372                         /* but this is.
3373                            we can't use the map for anything related to tempo,
3374                            so we round bbt using meters, which have no dependency
3375                            on pulse for this kind of thing.
3376                         */
3377                         bool use_snap;
3378                         TempoMap& map (_editor->session()->tempo_map());
3379
3380                         pf = adjusted_current_frame (event, false);
3381                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
3382                                 if (_editor->snap_mode() == Editing::SnapOff) {
3383                                         use_snap = true;
3384                                 } else {
3385                                         use_snap = false;
3386                                 }
3387                         } else {
3388                                 if (_editor->snap_mode() == Editing::SnapOff) {
3389                                         use_snap = false;
3390                                 } else {
3391                                         use_snap = true;
3392                                 }
3393                         }
3394
3395                         Timecode::BBT_Time when;
3396                         map.bbt_time (pf, when);
3397
3398                         if (_real_section->position_lock_style() == MusicTime) {
3399
3400                                 const double pulse = map.predict_tempo_pulse (_real_section, when);
3401                                 when = map.pulse_to_bbt (pulse);
3402                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3403                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3404                                 } else if (use_snap) {
3405                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3406                                 }
3407
3408                                 const double beat = map.bbt_to_beats (when);
3409                                 map.gui_move_tempo_beat (_real_section, beat);
3410                         } else {
3411                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3412                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3413                                 } else if (use_snap) {
3414                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3415                                 }
3416                                 if (use_snap) {
3417                                         pf = map.predict_tempo_frame (_real_section, when);
3418                                 }
3419                                 map.gui_move_tempo_frame (_real_section, pf);
3420                         }
3421                 }
3422
3423                 show_verbose_cursor_time (_real_section->frame());
3424         }
3425         _marker->set_position (pf);
3426 }
3427
3428 void
3429 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3430 {
3431         if (!_real_section->active()) {
3432                 return;
3433         }
3434         if (!movement_occurred) {
3435                 if (was_double_click()) {
3436                         _editor->edit_tempo_marker (*_marker);
3437                 }
3438                 return;
3439         }
3440
3441         TempoMap& map (_editor->session()->tempo_map());
3442
3443         XMLNode &after = map.get_state();
3444         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3445         _editor->commit_reversible_command ();
3446
3447         // delete the dummy marker we used for visual representation while moving.
3448         // a new visual marker will show up automatically.
3449         delete _marker;
3450 }
3451
3452 void
3453 TempoMarkerDrag::aborted (bool moved)
3454 {
3455         _marker->set_position (_marker->tempo().frame());
3456         if (moved) {
3457                 TempoMap& map (_editor->session()->tempo_map());
3458                 map.set_state (*before_state, Stateful::current_state_version);
3459                 // delete the dummy marker we used for visual representation while moving.
3460                 // a new visual marker will show up automatically.
3461                 delete _marker;
3462         }
3463 }
3464
3465 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3466         : Drag (e, i)
3467         , _pulse (0.0)
3468         , _beat (0.0)
3469         , _tempo (0)
3470         , before_state (0)
3471 {
3472         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3473
3474 }
3475
3476 void
3477 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3478 {
3479         Drag::start_grab (event, cursor);
3480
3481         TempoMap& map (_editor->session()->tempo_map());
3482         ostringstream sstr;
3483
3484         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3485         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3486         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3487         show_verbose_cursor_text (sstr.str());
3488         finished (event, false);
3489 }
3490
3491 void
3492 BBTRulerDrag::setup_pointer_frame_offset ()
3493 {
3494         TempoMap& map (_editor->session()->tempo_map());
3495         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3496         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3497         if (divisions > 0) {
3498                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3499         } else {
3500                 /* while it makes some sense for the user to determine the division to 'grab',
3501                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3502                    and the result over steep tempo curves. Use sixteenths.
3503                 */
3504                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3505         }
3506         _pulse = map.pulse_at_beat (_beat);
3507         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3508 }
3509
3510 void
3511 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3512 {
3513         TempoMap& map (_editor->session()->tempo_map());
3514
3515         if (first_move) {
3516                 /* get current state */
3517                 before_state = &map.get_state();
3518                 _editor->begin_reversible_command (_("dilate tempo"));
3519         }
3520
3521         framepos_t const pf = adjusted_current_frame (event, false);
3522
3523         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3524                 /* adjust previous tempo to match pointer frame */
3525                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3526         }
3527         ostringstream sstr;
3528         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3529         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3530         show_verbose_cursor_text (sstr.str());
3531 }
3532
3533 void
3534 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3535 {
3536         if (!movement_occurred) {
3537                 return;
3538         }
3539
3540         TempoMap& map (_editor->session()->tempo_map());
3541
3542         XMLNode &after = map.get_state();
3543         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3544         _editor->commit_reversible_command ();
3545 }
3546
3547 void
3548 BBTRulerDrag::aborted (bool moved)
3549 {
3550         if (moved) {
3551                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3552         }
3553 }
3554
3555
3556 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3557         : Drag (e, &c.track_canvas_item(), false)
3558         , _cursor (c)
3559         , _stop (s)
3560         , _grab_zoom (0.0)
3561 {
3562         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3563 }
3564
3565 /** Do all the things we do when dragging the playhead to make it look as though
3566  *  we have located, without actually doing the locate (because that would cause
3567  *  the diskstream buffers to be refilled, which is too slow).
3568  */
3569 void
3570 CursorDrag::fake_locate (framepos_t t)
3571 {
3572         if (_editor->session () == 0) {
3573                 return;
3574         }
3575
3576         _editor->playhead_cursor->set_position (t);
3577
3578         Session* s = _editor->session ();
3579         if (s->timecode_transmission_suspended ()) {
3580                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3581                 /* This is asynchronous so it will be sent "now"
3582                  */
3583                 s->send_mmc_locate (f);
3584                 /* These are synchronous and will be sent during the next
3585                    process cycle
3586                 */
3587                 s->queue_full_time_code ();
3588                 s->queue_song_position_pointer ();
3589         }
3590
3591         show_verbose_cursor_time (t);
3592         _editor->UpdateAllTransportClocks (t);
3593 }
3594
3595 void
3596 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3597 {
3598         Drag::start_grab (event, c);
3599         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3600
3601         _grab_zoom = _editor->samples_per_pixel;
3602
3603         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3604
3605         _editor->snap_to_with_modifier (where, event);
3606
3607         _editor->_dragging_playhead = true;
3608
3609         Session* s = _editor->session ();
3610
3611         /* grab the track canvas item as well */
3612
3613         _cursor.track_canvas_item().grab();
3614
3615         if (s) {
3616                 if (_was_rolling && _stop) {
3617                         s->request_stop ();
3618                 }
3619
3620                 if (s->is_auditioning()) {
3621                         s->cancel_audition ();
3622                 }
3623
3624
3625                 if (AudioEngine::instance()->connected()) {
3626
3627                         /* do this only if we're the engine is connected
3628                          * because otherwise this request will never be
3629                          * serviced and we'll busy wait forever. likewise,
3630                          * notice if we are disconnected while waiting for the
3631                          * request to be serviced.
3632                          */
3633
3634                         s->request_suspend_timecode_transmission ();
3635                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3636                                 /* twiddle our thumbs */
3637                         }
3638                 }
3639         }
3640
3641         fake_locate (where - snap_delta (event->button.state));
3642 }
3643
3644 void
3645 CursorDrag::motion (GdkEvent* event, bool)
3646 {
3647         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3648         _editor->snap_to_with_modifier (where, event);
3649         if (where != last_pointer_frame()) {
3650                 fake_locate (where - snap_delta (event->button.state));
3651         }
3652 }
3653
3654 void
3655 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3656 {
3657         _editor->_dragging_playhead = false;
3658
3659         _cursor.track_canvas_item().ungrab();
3660
3661         if (!movement_occurred && _stop) {
3662                 return;
3663         }
3664
3665         motion (event, false);
3666
3667         Session* s = _editor->session ();
3668         if (s) {
3669                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3670                 _editor->_pending_locate_request = true;
3671                 s->request_resume_timecode_transmission ();
3672         }
3673 }
3674
3675 void
3676 CursorDrag::aborted (bool)
3677 {
3678         _cursor.track_canvas_item().ungrab();
3679
3680         if (_editor->_dragging_playhead) {
3681                 _editor->session()->request_resume_timecode_transmission ();
3682                 _editor->_dragging_playhead = false;
3683         }
3684
3685         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3686 }
3687
3688 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3689         : RegionDrag (e, i, p, v)
3690 {
3691         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3692 }
3693
3694 void
3695 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3696 {
3697         Drag::start_grab (event, cursor);
3698
3699         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3700         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3701         setup_snap_delta (r->position ());
3702
3703         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3704 }
3705
3706 void
3707 FadeInDrag::setup_pointer_frame_offset ()
3708 {
3709         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3710         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3711         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3712 }
3713
3714 void
3715 FadeInDrag::motion (GdkEvent* event, bool)
3716 {
3717         framecnt_t fade_length;
3718
3719         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3720         _editor->snap_to_with_modifier (pos, event);
3721         pos -= snap_delta (event->button.state);
3722
3723         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3724
3725         if (pos < (region->position() + 64)) {
3726                 fade_length = 64; // this should be a minimum defined somewhere
3727         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3728                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3729         } else {
3730                 fade_length = pos - region->position();
3731         }
3732
3733         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3734
3735                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3736
3737                 if (!tmp) {
3738                         continue;
3739                 }
3740
3741                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3742         }
3743
3744         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3745 }
3746
3747 void
3748 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3749 {
3750         if (!movement_occurred) {
3751                 return;
3752         }
3753
3754         framecnt_t fade_length;
3755         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3756         _editor->snap_to_with_modifier (pos, event);
3757         pos -= snap_delta (event->button.state);
3758
3759         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3760
3761         if (pos < (region->position() + 64)) {
3762                 fade_length = 64; // this should be a minimum defined somewhere
3763         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3764                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3765         } else {
3766                 fade_length = pos - region->position();
3767         }
3768
3769         bool in_command = false;
3770
3771         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3772
3773                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3774
3775                 if (!tmp) {
3776                         continue;
3777                 }
3778
3779                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3780                 XMLNode &before = alist->get_state();
3781
3782                 tmp->audio_region()->set_fade_in_length (fade_length);
3783                 tmp->audio_region()->set_fade_in_active (true);
3784
3785                 if (!in_command) {
3786                         _editor->begin_reversible_command (_("change fade in length"));
3787                         in_command = true;
3788                 }
3789                 XMLNode &after = alist->get_state();
3790                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3791         }
3792
3793         if (in_command) {
3794                 _editor->commit_reversible_command ();
3795         }
3796 }
3797
3798 void
3799 FadeInDrag::aborted (bool)
3800 {
3801         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3802                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3803
3804                 if (!tmp) {
3805                         continue;
3806                 }
3807
3808                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3809         }
3810 }
3811
3812 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3813         : RegionDrag (e, i, p, v)
3814 {
3815         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3816 }
3817
3818 void
3819 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3820 {
3821         Drag::start_grab (event, cursor);
3822
3823         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3824         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3825         setup_snap_delta (r->last_frame ());
3826
3827         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3828 }
3829
3830 void
3831 FadeOutDrag::setup_pointer_frame_offset ()
3832 {
3833         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3834         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3835         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3836 }
3837
3838 void
3839 FadeOutDrag::motion (GdkEvent* event, bool)
3840 {
3841         framecnt_t fade_length;
3842
3843         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3844         _editor->snap_to_with_modifier (pos, event);
3845         pos -= snap_delta (event->button.state);
3846
3847         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3848
3849         if (pos > (region->last_frame() - 64)) {
3850                 fade_length = 64; // this should really be a minimum fade defined somewhere
3851         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3852                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3853         } else {
3854                 fade_length = region->last_frame() - pos;
3855         }
3856
3857         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3858
3859                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3860
3861                 if (!tmp) {
3862                         continue;
3863                 }
3864
3865                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3866         }
3867
3868         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3869 }
3870
3871 void
3872 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3873 {
3874         if (!movement_occurred) {
3875                 return;
3876         }
3877
3878         framecnt_t fade_length;
3879
3880         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3881         _editor->snap_to_with_modifier (pos, event);
3882         pos -= snap_delta (event->button.state);
3883
3884         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3885
3886         if (pos > (region->last_frame() - 64)) {
3887                 fade_length = 64; // this should really be a minimum fade defined somewhere
3888         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3889                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3890         } else {
3891                 fade_length = region->last_frame() - pos;
3892         }
3893
3894         bool in_command = false;
3895
3896         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3897
3898                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3899
3900                 if (!tmp) {
3901                         continue;
3902                 }
3903
3904                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3905                 XMLNode &before = alist->get_state();
3906
3907                 tmp->audio_region()->set_fade_out_length (fade_length);
3908                 tmp->audio_region()->set_fade_out_active (true);
3909
3910                 if (!in_command) {
3911                         _editor->begin_reversible_command (_("change fade out length"));
3912                         in_command = true;
3913                 }
3914                 XMLNode &after = alist->get_state();
3915                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3916         }
3917
3918         if (in_command) {
3919                 _editor->commit_reversible_command ();
3920         }
3921 }
3922
3923 void
3924 FadeOutDrag::aborted (bool)
3925 {
3926         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3927                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3928
3929                 if (!tmp) {
3930                         continue;
3931                 }
3932
3933                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3934         }
3935 }
3936
3937 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3938         : Drag (e, i)
3939         , _selection_changed (false)
3940 {
3941         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3942         Gtk::Window* toplevel = _editor->current_toplevel();
3943         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3944
3945         assert (_marker);
3946
3947         _points.push_back (ArdourCanvas::Duple (0, 0));
3948
3949         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3950 }
3951
3952 MarkerDrag::~MarkerDrag ()
3953 {
3954         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3955                 delete i->location;
3956         }
3957 }
3958
3959 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3960 {
3961         location = new Location (*l);
3962         markers.push_back (m);
3963         move_both = false;
3964 }
3965
3966 void
3967 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3968 {
3969         Drag::start_grab (event, cursor);
3970
3971         bool is_start;
3972
3973         Location *location = _editor->find_location_from_marker (_marker, is_start);
3974         _editor->_dragging_edit_point = true;
3975
3976         update_item (location);
3977
3978         // _drag_line->show();
3979         // _line->raise_to_top();
3980
3981         if (is_start) {
3982                 show_verbose_cursor_time (location->start());
3983         } else {
3984                 show_verbose_cursor_time (location->end());
3985         }
3986         setup_snap_delta (is_start ? location->start() : location->end());
3987
3988         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3989
3990         switch (op) {
3991         case Selection::Toggle:
3992                 /* we toggle on the button release */
3993                 break;
3994         case Selection::Set:
3995                 if (!_editor->selection->selected (_marker)) {
3996                         _editor->selection->set (_marker);
3997                         _selection_changed = true;
3998                 }
3999                 break;
4000         case Selection::Extend:
4001         {
4002                 Locations::LocationList ll;
4003                 list<ArdourMarker*> to_add;
4004                 framepos_t s, e;
4005                 _editor->selection->markers.range (s, e);
4006                 s = min (_marker->position(), s);
4007                 e = max (_marker->position(), e);
4008                 s = min (s, e);
4009                 e = max (s, e);
4010                 if (e < max_framepos) {
4011                         ++e;
4012                 }
4013                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
4014                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
4015                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
4016                         if (lm) {
4017                                 if (lm->start) {
4018                                         to_add.push_back (lm->start);
4019                                 }
4020                                 if (lm->end) {
4021                                         to_add.push_back (lm->end);
4022                                 }
4023                         }
4024                 }
4025                 if (!to_add.empty()) {
4026                         _editor->selection->add (to_add);
4027                         _selection_changed = true;
4028                 }
4029                 break;
4030         }
4031         case Selection::Add:
4032                 _editor->selection->add (_marker);
4033                 _selection_changed = true;
4034
4035                 break;
4036         }
4037
4038         /* Set up copies for us to manipulate during the drag
4039          */
4040
4041         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
4042
4043                 Location* l = _editor->find_location_from_marker (*i, is_start);
4044
4045                 if (!l) {
4046                         continue;
4047                 }
4048
4049                 if (l->is_mark()) {
4050                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4051                 } else {
4052                         /* range: check that the other end of the range isn't
4053                            already there.
4054                         */
4055                         CopiedLocationInfo::iterator x;
4056                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4057                                 if (*(*x).location == *l) {
4058                                         break;
4059                                 }
4060                         }
4061                         if (x == _copied_locations.end()) {
4062                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4063                         } else {
4064                                 (*x).markers.push_back (*i);
4065                                 (*x).move_both = true;
4066                         }
4067                 }
4068
4069         }
4070 }
4071
4072 void
4073 MarkerDrag::setup_pointer_frame_offset ()
4074 {
4075         bool is_start;
4076         Location *location = _editor->find_location_from_marker (_marker, is_start);
4077         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4078 }
4079
4080 void
4081 MarkerDrag::motion (GdkEvent* event, bool)
4082 {
4083         framecnt_t f_delta = 0;
4084         bool is_start;
4085         bool move_both = false;
4086         Location *real_location;
4087         Location *copy_location = 0;
4088         framecnt_t const sd = snap_delta (event->button.state);
4089
4090         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4091         framepos_t next = newframe;
4092
4093         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4094                 move_both = true;
4095         }
4096
4097         CopiedLocationInfo::iterator x;
4098
4099         /* find the marker we're dragging, and compute the delta */
4100
4101         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4102
4103                 copy_location = (*x).location;
4104
4105                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4106
4107                         /* this marker is represented by this
4108                          * CopiedLocationMarkerInfo
4109                          */
4110
4111                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4112                                 /* que pasa ?? */
4113                                 return;
4114                         }
4115
4116                         if (real_location->is_mark()) {
4117                                 f_delta = newframe - copy_location->start();
4118                         } else {
4119
4120
4121                                 switch (_marker->type()) {
4122                                 case ArdourMarker::SessionStart:
4123                                 case ArdourMarker::RangeStart:
4124                                 case ArdourMarker::LoopStart:
4125                                 case ArdourMarker::PunchIn:
4126                                         f_delta = newframe - copy_location->start();
4127                                         break;
4128
4129                                 case ArdourMarker::SessionEnd:
4130                                 case ArdourMarker::RangeEnd:
4131                                 case ArdourMarker::LoopEnd:
4132                                 case ArdourMarker::PunchOut:
4133                                         f_delta = newframe - copy_location->end();
4134                                         break;
4135                                 default:
4136                                         /* what kind of marker is this ? */
4137                                         return;
4138                                 }
4139                         }
4140
4141                         break;
4142                 }
4143         }
4144
4145         if (x == _copied_locations.end()) {
4146                 /* hmm, impossible - we didn't find the dragged marker */
4147                 return;
4148         }
4149
4150         /* now move them all */
4151
4152         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4153
4154                 copy_location = x->location;
4155
4156                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4157                         continue;
4158                 }
4159
4160                 if (real_location->locked()) {
4161                         continue;
4162                 }
4163
4164                 if (copy_location->is_mark()) {
4165
4166                         /* now move it */
4167
4168                         copy_location->set_start (copy_location->start() + f_delta);
4169
4170                 } else {
4171
4172                         framepos_t new_start = copy_location->start() + f_delta;
4173                         framepos_t new_end = copy_location->end() + f_delta;
4174
4175                         if (is_start) { // start-of-range marker
4176
4177                                 if (move_both || (*x).move_both) {
4178                                         copy_location->set_start (new_start);
4179                                         copy_location->set_end (new_end);
4180                                 } else  if (new_start < copy_location->end()) {
4181                                         copy_location->set_start (new_start);
4182                                 } else if (newframe > 0) {
4183                                         //_editor->snap_to (next, RoundUpAlways, true);
4184                                         copy_location->set_end (next);
4185                                         copy_location->set_start (newframe);
4186                                 }
4187
4188                         } else { // end marker
4189
4190                                 if (move_both || (*x).move_both) {
4191                                         copy_location->set_end (new_end);
4192                                         copy_location->set_start (new_start);
4193                                 } else if (new_end > copy_location->start()) {
4194                                         copy_location->set_end (new_end);
4195                                 } else if (newframe > 0) {
4196                                         //_editor->snap_to (next, RoundDownAlways, true);
4197                                         copy_location->set_start (next);
4198                                         copy_location->set_end (newframe);
4199                                 }
4200                         }
4201                 }
4202
4203                 update_item (copy_location);
4204
4205                 /* now lookup the actual GUI items used to display this
4206                  * location and move them to wherever the copy of the location
4207                  * is now. This means that the logic in ARDOUR::Location is
4208                  * still enforced, even though we are not (yet) modifying
4209                  * the real Location itself.
4210                  */
4211
4212                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4213
4214                 if (lm) {
4215                         lm->set_position (copy_location->start(), copy_location->end());
4216                 }
4217
4218         }
4219
4220         assert (!_copied_locations.empty());
4221
4222         show_verbose_cursor_time (newframe);
4223 }
4224
4225 void
4226 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4227 {
4228         if (!movement_occurred) {
4229
4230                 if (was_double_click()) {
4231                         _editor->rename_marker (_marker);
4232                         return;
4233                 }
4234
4235                 /* just a click, do nothing but finish
4236                    off the selection process
4237                 */
4238
4239                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4240                 switch (op) {
4241                 case Selection::Set:
4242                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4243                                 _editor->selection->set (_marker);
4244                                 _selection_changed = true;
4245                         }
4246                         break;
4247
4248                 case Selection::Toggle:
4249                         /* we toggle on the button release, click only */
4250                         _editor->selection->toggle (_marker);
4251                         _selection_changed = true;
4252
4253                         break;
4254
4255                 case Selection::Extend:
4256                 case Selection::Add:
4257                         break;
4258                 }
4259
4260                 if (_selection_changed) {
4261                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4262                         _editor->commit_reversible_selection_op();
4263                 }
4264
4265                 return;
4266         }
4267
4268         _editor->_dragging_edit_point = false;
4269
4270         XMLNode &before = _editor->session()->locations()->get_state();
4271         bool in_command = false;
4272
4273         MarkerSelection::iterator i;
4274         CopiedLocationInfo::iterator x;
4275         bool is_start;
4276
4277         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4278              x != _copied_locations.end() && i != _editor->selection->markers.end();
4279              ++i, ++x) {
4280
4281                 Location * location = _editor->find_location_from_marker (*i, is_start);
4282
4283                 if (location) {
4284
4285                         if (location->locked()) {
4286                                 continue;
4287                         }
4288                         if (!in_command) {
4289                                 _editor->begin_reversible_command ( _("move marker") );
4290                                 in_command = true;
4291                         }
4292                         if (location->is_mark()) {
4293                                 location->set_start (((*x).location)->start());
4294                         } else {
4295                                 location->set (((*x).location)->start(), ((*x).location)->end());
4296                         }
4297                 }
4298         }
4299
4300         if (in_command) {
4301                 XMLNode &after = _editor->session()->locations()->get_state();
4302                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4303                 _editor->commit_reversible_command ();
4304         }
4305 }
4306
4307 void
4308 MarkerDrag::aborted (bool movement_occurred)
4309 {
4310         if (!movement_occurred) {
4311                 return;
4312         }
4313
4314         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4315
4316                 /* move all markers to their original location */
4317
4318
4319                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4320
4321                         bool is_start;
4322                         Location * location = _editor->find_location_from_marker (*m, is_start);
4323
4324                         if (location) {
4325                                 (*m)->set_position (is_start ? location->start() : location->end());
4326                         }
4327                 }
4328         }
4329 }
4330
4331 void
4332 MarkerDrag::update_item (Location*)
4333 {
4334         /* noop */
4335 }
4336
4337 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4338         : Drag (e, i)
4339         , _fixed_grab_x (0.0)
4340         , _fixed_grab_y (0.0)
4341         , _cumulative_x_drag (0.0)
4342         , _cumulative_y_drag (0.0)
4343         , _pushing (false)
4344         , _final_index (0)
4345 {
4346         if (_zero_gain_fraction < 0.0) {
4347                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4348         }
4349
4350         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4351
4352         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4353         assert (_point);
4354 }
4355
4356
4357 void
4358 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4359 {
4360         Drag::start_grab (event, _editor->cursors()->fader);
4361
4362         // start the grab at the center of the control point so
4363         // the point doesn't 'jump' to the mouse after the first drag
4364         _fixed_grab_x = _point->get_x();
4365         _fixed_grab_y = _point->get_y();
4366
4367         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4368         setup_snap_delta (pos);
4369
4370         float const fraction = 1 - (_point->get_y() / _point->line().height());
4371         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4372
4373         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4374
4375         if (!_point->can_slide ()) {
4376                 _x_constrained = true;
4377         }
4378 }
4379
4380 void
4381 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4382 {
4383         double dx = _drags->current_pointer_x() - last_pointer_x();
4384         double dy = current_pointer_y() - last_pointer_y();
4385         bool need_snap = true;
4386
4387         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4388                 dx *= 0.1;
4389                 dy *= 0.1;
4390                 need_snap = false;
4391         }
4392
4393         /* coordinate in pixels relative to the start of the region (for region-based automation)
4394            or track (for track-based automation) */
4395         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4396         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4397
4398         // calculate zero crossing point. back off by .01 to stay on the
4399         // positive side of zero
4400         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4401
4402         if (_x_constrained) {
4403                 cx = _fixed_grab_x;
4404         }
4405         if (_y_constrained) {
4406                 cy = _fixed_grab_y;
4407         }
4408
4409         _cumulative_x_drag = cx - _fixed_grab_x;
4410         _cumulative_y_drag = cy - _fixed_grab_y;
4411
4412         cx = max (0.0, cx);
4413         cy = max (0.0, cy);
4414         cy = min ((double) _point->line().height(), cy);
4415
4416         // make sure we hit zero when passing through
4417         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4418                 cy = zero_gain_y;
4419         }
4420
4421         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4422
4423         if (!_x_constrained && need_snap) {
4424                 _editor->snap_to_with_modifier (cx_frames, event);
4425         }
4426
4427         cx_frames -= snap_delta (event->button.state);
4428         cx_frames = min (cx_frames, _point->line().maximum_time());
4429
4430         float const fraction = 1.0 - (cy / _point->line().height());
4431
4432         if (first_motion) {
4433                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4434                 _editor->begin_reversible_command (_("automation event move"));
4435                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4436         }
4437         pair<double, float> result;
4438         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4439
4440         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4441 }
4442
4443 void
4444 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4445 {
4446         if (!movement_occurred) {
4447
4448                 /* just a click */
4449                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4450                         _editor->reset_point_selection ();
4451                 }
4452
4453         } else {
4454                 _point->line().end_drag (_pushing, _final_index);
4455                 _editor->commit_reversible_command ();
4456         }
4457 }
4458
4459 void
4460 ControlPointDrag::aborted (bool)
4461 {
4462         _point->line().reset ();
4463 }
4464
4465 bool
4466 ControlPointDrag::active (Editing::MouseMode m)
4467 {
4468         if (m == Editing::MouseDraw) {
4469                 /* always active in mouse draw */
4470                 return true;
4471         }
4472
4473         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4474         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4475 }
4476
4477 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4478         : Drag (e, i)
4479         , _line (0)
4480         , _fixed_grab_x (0.0)
4481         , _fixed_grab_y (0.0)
4482         , _cumulative_y_drag (0)
4483         , _before (0)
4484         , _after (0)
4485 {
4486         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4487 }
4488
4489 void
4490 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4491 {
4492         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4493         assert (_line);
4494
4495         _item = &_line->grab_item ();
4496
4497         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4498            origin, and ditto for y.
4499         */
4500
4501         double mx = event->button.x;
4502         double my = event->button.y;
4503
4504         _line->grab_item().canvas_to_item (mx, my);
4505
4506         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4507
4508         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4509                 /* no adjacent points */
4510                 return;
4511         }
4512
4513         Drag::start_grab (event, _editor->cursors()->fader);
4514
4515         /* store grab start in item frame */
4516         double const bx = _line->nth (_before)->get_x();
4517         double const ax = _line->nth (_after)->get_x();
4518         double const click_ratio = (ax - mx) / (ax - bx);
4519
4520         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4521
4522         _fixed_grab_x = mx;
4523         _fixed_grab_y = cy;
4524
4525         double fraction = 1.0 - (cy / _line->height());
4526
4527         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4528 }
4529
4530 void
4531 LineDrag::motion (GdkEvent* event, bool first_move)
4532 {
4533         double dy = current_pointer_y() - last_pointer_y();
4534
4535         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4536                 dy *= 0.1;
4537         }
4538
4539         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4540
4541         _cumulative_y_drag = cy - _fixed_grab_y;
4542
4543         cy = max (0.0, cy);
4544         cy = min ((double) _line->height(), cy);
4545
4546         double const fraction = 1.0 - (cy / _line->height());
4547         uint32_t ignored;
4548
4549         if (first_move) {
4550                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4551
4552                 _editor->begin_reversible_command (_("automation range move"));
4553                 _line->start_drag_line (_before, _after, initial_fraction);
4554         }
4555
4556         /* we are ignoring x position for this drag, so we can just pass in anything */
4557         pair<double, float> result;
4558
4559         result = _line->drag_motion (0, fraction, true, false, ignored);
4560         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4561 }
4562
4563 void
4564 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4565 {
4566         if (movement_occurred) {
4567                 motion (event, false);
4568                 _line->end_drag (false, 0);
4569                 _editor->commit_reversible_command ();
4570         } else {
4571                 /* add a new control point on the line */
4572
4573                 AutomationTimeAxisView* atv;
4574
4575                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4576                         framepos_t where = grab_frame ();
4577
4578                         double cx = 0;
4579                         double cy = _fixed_grab_y;
4580
4581                         _line->grab_item().item_to_canvas (cx, cy);
4582
4583                         atv->add_automation_event (event, where, cy, false);
4584                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4585                         AudioRegionView* arv;
4586
4587                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4588                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4589                         }
4590                 }
4591         }
4592 }
4593
4594 void
4595 LineDrag::aborted (bool)
4596 {
4597         _line->reset ();
4598 }
4599
4600 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4601         : Drag (e, i),
4602           _line (0),
4603           _arv (0),
4604           _region_view_grab_x (0.0),
4605           _cumulative_x_drag (0),
4606           _before (0.0),
4607           _max_x (0)
4608 {
4609         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4610 }
4611
4612 void
4613 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4614 {
4615         Drag::start_grab (event);
4616
4617         _line = reinterpret_cast<Line*> (_item);
4618         assert (_line);
4619
4620         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4621
4622         double cx = event->button.x;
4623         double cy = event->button.y;
4624
4625         _item->parent()->canvas_to_item (cx, cy);
4626
4627         /* store grab start in parent frame */
4628         _region_view_grab_x = cx;
4629
4630         _before = *(float*) _item->get_data ("position");
4631
4632         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4633
4634         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4635 }
4636
4637 void
4638 FeatureLineDrag::motion (GdkEvent*, bool)
4639 {
4640         double dx = _drags->current_pointer_x() - last_pointer_x();
4641
4642         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4643
4644         _cumulative_x_drag += dx;
4645
4646         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4647
4648         if (cx > _max_x){
4649                 cx = _max_x;
4650         }
4651         else if(cx < 0){
4652                 cx = 0;
4653         }
4654
4655         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4656         assert (bbox);
4657         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4658
4659         float *pos = new float;
4660         *pos = cx;
4661
4662         _line->set_data ("position", pos);
4663
4664         _before = cx;
4665 }
4666
4667 void
4668 FeatureLineDrag::finished (GdkEvent*, bool)
4669 {
4670         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4671         _arv->update_transient(_before, _before);
4672 }
4673
4674 void
4675 FeatureLineDrag::aborted (bool)
4676 {
4677         //_line->reset ();
4678 }
4679
4680 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4681         : Drag (e, i)
4682         , _vertical_only (false)
4683 {
4684         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4685 }
4686
4687 void
4688 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4689 {
4690         Drag::start_grab (event);
4691         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4692 }
4693
4694 void
4695 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4696 {
4697         framepos_t start;
4698         framepos_t end;
4699         double y1;
4700         double y2;
4701
4702         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4703
4704         framepos_t grab = grab_frame ();
4705         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4706                 _editor->snap_to_with_modifier (grab, event);
4707         } else {
4708                 grab = raw_grab_frame ();
4709         }
4710
4711         /* base start and end on initial click position */
4712
4713         if (pf < grab) {
4714                 start = pf;
4715                 end = grab;
4716         } else {
4717                 end = pf;
4718                 start = grab;
4719         }
4720
4721         if (current_pointer_y() < grab_y()) {
4722                 y1 = current_pointer_y();
4723                 y2 = grab_y();
4724         } else {
4725                 y2 = current_pointer_y();
4726                 y1 = grab_y();
4727         }
4728
4729         if (start != end || y1 != y2) {
4730
4731                 double x1 = _editor->sample_to_pixel (start);
4732                 double x2 = _editor->sample_to_pixel (end);
4733                 const double min_dimension = 2.0;
4734
4735                 if (_vertical_only) {
4736                         /* fixed 10 pixel width */
4737                         x2 = x1 + 10;
4738                 } else {
4739                         if (x2 < x1) {
4740                                 x2 = min (x1 - min_dimension, x2);
4741                         } else {
4742                                 x2 = max (x1 + min_dimension, x2);
4743                         }
4744                 }
4745
4746                 if (y2 < y1) {
4747                         y2 = min (y1 - min_dimension, y2);
4748                 } else {
4749                         y2 = max (y1 + min_dimension, y2);
4750                 }
4751
4752                 /* translate rect into item space and set */
4753
4754                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4755
4756                 /* this drag is a _trackview_only == true drag, so the y1 and
4757                  * y2 (computed using current_pointer_y() and grab_y()) will be
4758                  * relative to the top of the trackview group). The
4759                  * rubberband rect has the same parent/scroll offset as the
4760                  * the trackview group, so we can use the "r" rect directly
4761                  * to set the shape of the rubberband.
4762                  */
4763
4764                 _editor->rubberband_rect->set (r);
4765                 _editor->rubberband_rect->show();
4766                 _editor->rubberband_rect->raise_to_top();
4767
4768                 show_verbose_cursor_time (pf);
4769
4770                 do_select_things (event, true);
4771         }
4772 }
4773
4774 void
4775 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4776 {
4777         framepos_t x1;
4778         framepos_t x2;
4779         framepos_t grab = grab_frame ();
4780         framepos_t lpf = last_pointer_frame ();
4781
4782         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4783                 grab = raw_grab_frame ();
4784                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4785         }
4786
4787         if (grab < lpf) {
4788                 x1 = grab;
4789                 x2 = lpf;
4790         } else {
4791                 x2 = grab;
4792                 x1 = lpf;
4793         }
4794
4795         double y1;
4796         double y2;
4797
4798         if (current_pointer_y() < grab_y()) {
4799                 y1 = current_pointer_y();
4800                 y2 = grab_y();
4801         } else {
4802                 y2 = current_pointer_y();
4803                 y1 = grab_y();
4804         }
4805
4806         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4807 }
4808
4809 void
4810 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4811 {
4812         if (movement_occurred) {
4813
4814                 motion (event, false);
4815                 do_select_things (event, false);
4816
4817         } else {
4818
4819                 /* just a click */
4820
4821                 bool do_deselect = true;
4822                 MidiTimeAxisView* mtv;
4823
4824                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4825                         /* MIDI track */
4826                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4827                                 /* nothing selected */
4828                                 add_midi_region (mtv, true);
4829                                 do_deselect = false;
4830                         }
4831                 }
4832
4833                 /* do not deselect if Primary or Tertiary (toggle-select or
4834                  * extend-select are pressed.
4835                  */
4836
4837                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4838                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4839                     do_deselect) {
4840                         deselect_things ();
4841                 }
4842
4843         }
4844
4845         _editor->rubberband_rect->hide();
4846 }
4847
4848 void
4849 RubberbandSelectDrag::aborted (bool)
4850 {
4851         _editor->rubberband_rect->hide ();
4852 }
4853
4854 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4855         : RegionDrag (e, i, p, v)
4856 {
4857         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4858 }
4859
4860 void
4861 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4862 {
4863         Drag::start_grab (event, cursor);
4864
4865         _editor->get_selection().add (_primary);
4866
4867         framepos_t where = _primary->region()->position();
4868         setup_snap_delta (where);
4869
4870         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4871 }
4872
4873 void
4874 TimeFXDrag::motion (GdkEvent* event, bool)
4875 {
4876         RegionView* rv = _primary;
4877         StreamView* cv = rv->get_time_axis_view().view ();
4878
4879         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4880         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4881         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4882         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4883         _editor->snap_to_with_modifier (pf, event);
4884         pf -= snap_delta (event->button.state);
4885
4886         if (pf > rv->region()->position()) {
4887                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4888         }
4889
4890         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4891 }
4892
4893 void
4894 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4895 {
4896         /* this may have been a single click, no drag. We still want the dialog
4897            to show up in that case, so that the user can manually edit the
4898            parameters for the timestretch.
4899         */
4900
4901         float fraction = 1.0;
4902
4903         if (movement_occurred) {
4904
4905                 motion (event, false);
4906
4907                 _primary->get_time_axis_view().hide_timestretch ();
4908
4909                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4910
4911                 if (adjusted_frame_pos < _primary->region()->position()) {
4912                         /* backwards drag of the left edge - not usable */
4913                         return;
4914                 }
4915
4916                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4917
4918                 fraction = (double) newlen / (double) _primary->region()->length();
4919
4920 #ifndef USE_RUBBERBAND
4921                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4922                 if (_primary->region()->data_type() == DataType::AUDIO) {
4923                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4924                 }
4925 #endif
4926         }
4927
4928         if (!_editor->get_selection().regions.empty()) {
4929                 /* primary will already be included in the selection, and edit
4930                    group shared editing will propagate selection across
4931                    equivalent regions, so just use the current region
4932                    selection.
4933                 */
4934
4935                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4936                         error << _("An error occurred while executing time stretch operation") << endmsg;
4937                 }
4938         }
4939 }
4940
4941 void
4942 TimeFXDrag::aborted (bool)
4943 {
4944         _primary->get_time_axis_view().hide_timestretch ();
4945 }
4946
4947 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4948         : Drag (e, i)
4949 {
4950         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4951 }
4952
4953 void
4954 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4955 {
4956         Drag::start_grab (event);
4957 }
4958
4959 void
4960 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4961 {
4962         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4963 }
4964
4965 void
4966 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4967 {
4968         if (movement_occurred && _editor->session()) {
4969                 /* make sure we stop */
4970                 _editor->session()->request_transport_speed (0.0);
4971         }
4972 }
4973
4974 void
4975 ScrubDrag::aborted (bool)
4976 {
4977         /* XXX: TODO */
4978 }
4979
4980 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4981         : Drag (e, i)
4982         , _operation (o)
4983         , _add (false)
4984         , _time_selection_at_start (!_editor->get_selection().time.empty())
4985 {
4986         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4987
4988         if (_time_selection_at_start) {
4989                 start_at_start = _editor->get_selection().time.start();
4990                 end_at_start = _editor->get_selection().time.end_frame();
4991         }
4992 }
4993
4994 void
4995 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4996 {
4997         if (_editor->session() == 0) {
4998                 return;
4999         }
5000
5001         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5002
5003         switch (_operation) {
5004         case CreateSelection:
5005                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5006                         _add = true;
5007                 } else {
5008                         _add = false;
5009                 }
5010                 cursor = _editor->cursors()->selector;
5011                 Drag::start_grab (event, cursor);
5012                 break;
5013
5014         case SelectionStartTrim:
5015                 if (_editor->clicked_axisview) {
5016                         _editor->clicked_axisview->order_selection_trims (_item, true);
5017                 }
5018                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
5019                 break;
5020
5021         case SelectionEndTrim:
5022                 if (_editor->clicked_axisview) {
5023                         _editor->clicked_axisview->order_selection_trims (_item, false);
5024                 }
5025                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
5026                 break;
5027
5028         case SelectionMove:
5029                 Drag::start_grab (event, cursor);
5030                 break;
5031
5032         case SelectionExtend:
5033                 Drag::start_grab (event, cursor);
5034                 break;
5035         }
5036
5037         if (_operation == SelectionMove) {
5038                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
5039         } else {
5040                 show_verbose_cursor_time (adjusted_current_frame (event));
5041         }
5042 }
5043
5044 void
5045 SelectionDrag::setup_pointer_frame_offset ()
5046 {
5047         switch (_operation) {
5048         case CreateSelection:
5049                 _pointer_frame_offset = 0;
5050                 break;
5051
5052         case SelectionStartTrim:
5053         case SelectionMove:
5054                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5055                 break;
5056
5057         case SelectionEndTrim:
5058                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5059                 break;
5060
5061         case SelectionExtend:
5062                 break;
5063         }
5064 }
5065
5066 void
5067 SelectionDrag::motion (GdkEvent* event, bool first_move)
5068 {
5069         framepos_t start = 0;
5070         framepos_t end = 0;
5071         framecnt_t length = 0;
5072         framecnt_t distance = 0;
5073
5074         framepos_t const pending_position = adjusted_current_frame (event);
5075
5076         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5077                 return;
5078         }
5079
5080         switch (_operation) {
5081         case CreateSelection:
5082         {
5083                 framepos_t grab = grab_frame ();
5084
5085                 if (first_move) {
5086                         grab = adjusted_current_frame (event, false);
5087                         if (grab < pending_position) {
5088                                 _editor->snap_to (grab, RoundDownMaybe);
5089                         }  else {
5090                                 _editor->snap_to (grab, RoundUpMaybe);
5091                         }
5092                 }
5093
5094                 if (pending_position < grab) {
5095                         start = pending_position;
5096                         end = grab;
5097                 } else {
5098                         end = pending_position;
5099                         start = grab;
5100                 }
5101
5102                 /* first drag: Either add to the selection
5103                    or create a new selection
5104                 */
5105
5106                 if (first_move) {
5107
5108                         if (_add) {
5109
5110                                 /* adding to the selection */
5111                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5112                                 _editor->clicked_selection = _editor->selection->add (start, end);
5113                                 _add = false;
5114
5115                         } else {
5116
5117                                 /* new selection */
5118
5119                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5120                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5121                                 }
5122
5123                                 _editor->clicked_selection = _editor->selection->set (start, end);
5124                         }
5125                 }
5126
5127                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5128                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5129                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5130                 if (atest) {
5131                         _editor->selection->add (atest);
5132                         break;
5133                 }
5134
5135                 /* select all tracks within the rectangle that we've marked out so far */
5136                 TrackViewList new_selection;
5137                 TrackViewList& all_tracks (_editor->track_views);
5138
5139                 ArdourCanvas::Coord const top = grab_y();
5140                 ArdourCanvas::Coord const bottom = current_pointer_y();
5141
5142                 if (top >= 0 && bottom >= 0) {
5143
5144                         //first, find the tracks that are covered in the y range selection
5145                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5146                                 if ((*i)->covered_by_y_range (top, bottom)) {
5147                                         new_selection.push_back (*i);
5148                                 }
5149                         }
5150
5151                         //now find any tracks that are GROUPED with the tracks we selected
5152                         TrackViewList grouped_add = new_selection;
5153                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5154                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5155                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5156                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5157                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5158                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5159                                                         grouped_add.push_back (*j);
5160                                         }
5161                                 }
5162                         }
5163
5164                         //now compare our list with the current selection, and add or remove as necessary
5165                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5166                         TrackViewList tracks_to_add;
5167                         TrackViewList tracks_to_remove;
5168                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5169                                 if ( !_editor->selection->tracks.contains ( *i ) )
5170                                         tracks_to_add.push_back ( *i );
5171                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5172                                 if ( !grouped_add.contains ( *i ) )
5173                                         tracks_to_remove.push_back ( *i );
5174                         _editor->selection->add(tracks_to_add);
5175                         _editor->selection->remove(tracks_to_remove);
5176
5177                 }
5178         }
5179         break;
5180
5181         case SelectionStartTrim:
5182
5183                 end = _editor->selection->time[_editor->clicked_selection].end;
5184
5185                 if (pending_position > end) {
5186                         start = end;
5187                 } else {
5188                         start = pending_position;
5189                 }
5190                 break;
5191
5192         case SelectionEndTrim:
5193
5194                 start = _editor->selection->time[_editor->clicked_selection].start;
5195
5196                 if (pending_position < start) {
5197                         end = start;
5198                 } else {
5199                         end = pending_position;
5200                 }
5201
5202                 break;
5203
5204         case SelectionMove:
5205
5206                 start = _editor->selection->time[_editor->clicked_selection].start;
5207                 end = _editor->selection->time[_editor->clicked_selection].end;
5208
5209                 length = end - start;
5210                 distance = pending_position - start;
5211                 start = pending_position;
5212                 _editor->snap_to (start);
5213
5214                 end = start + length;
5215
5216                 break;
5217
5218         case SelectionExtend:
5219                 break;
5220         }
5221
5222         if (start != end) {
5223                 switch (_operation) {
5224                 case SelectionMove:
5225                         if (_time_selection_at_start) {
5226                                 _editor->selection->move_time (distance);
5227                         }
5228                         break;
5229                 default:
5230                         _editor->selection->replace (_editor->clicked_selection, start, end);
5231                 }
5232         }
5233
5234         if (_operation == SelectionMove) {
5235                 show_verbose_cursor_time(start);
5236         } else {
5237                 show_verbose_cursor_time(pending_position);
5238         }
5239 }
5240
5241 void
5242 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5243 {
5244         Session* s = _editor->session();
5245
5246         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5247         if (movement_occurred) {
5248                 motion (event, false);
5249                 /* XXX this is not object-oriented programming at all. ick */
5250                 if (_editor->selection->time.consolidate()) {
5251                         _editor->selection->TimeChanged ();
5252                 }
5253
5254                 /* XXX what if its a music time selection? */
5255                 if (s) {
5256                         if (s->get_play_range() && s->transport_rolling()) {
5257                                 s->request_play_range (&_editor->selection->time, true);
5258                         } else if (!s->config.get_external_sync()) {
5259                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5260                                         if (_operation == SelectionEndTrim)
5261                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5262                                         else
5263                                                 s->request_locate (_editor->get_selection().time.start());
5264                                 }
5265                         }
5266
5267                         if (_editor->get_selection().time.length() != 0) {
5268                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5269                         } else {
5270                                 s->clear_range_selection ();
5271                         }
5272                 }
5273
5274         } else {
5275                 /* just a click, no pointer movement.
5276                  */
5277
5278                 if (_operation == SelectionExtend) {
5279                         if (_time_selection_at_start) {
5280                                 framepos_t pos = adjusted_current_frame (event, false);
5281                                 framepos_t start = min (pos, start_at_start);
5282                                 framepos_t end = max (pos, end_at_start);
5283                                 _editor->selection->set (start, end);
5284                         }
5285                 } else {
5286                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5287                                 if (_editor->clicked_selection) {
5288                                         _editor->selection->remove (_editor->clicked_selection);
5289                                 }
5290                         } else {
5291                                 if (!_editor->clicked_selection) {
5292                                         _editor->selection->clear_time();
5293                                 }
5294                         }
5295                 }
5296
5297                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5298                         _editor->selection->set (_editor->clicked_axisview);
5299                 }
5300
5301                 if (s && s->get_play_range () && s->transport_rolling()) {
5302                         s->request_stop (false, false);
5303                 }
5304
5305         }
5306
5307         _editor->stop_canvas_autoscroll ();
5308         _editor->clicked_selection = 0;
5309         _editor->commit_reversible_selection_op ();
5310 }
5311
5312 void
5313 SelectionDrag::aborted (bool)
5314 {
5315         /* XXX: TODO */
5316 }
5317
5318 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5319         : Drag (e, i, false),
5320           _operation (o),
5321           _copy (false)
5322 {
5323         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5324
5325         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5326                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5327                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5328         _drag_rect->hide ();
5329
5330         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5331         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5332 }
5333
5334 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5335 {
5336         /* normal canvas items will be cleaned up when their parent group is deleted. But
5337            this item is created as the child of a long-lived parent group, and so we
5338            need to explicitly delete it.
5339         */
5340         delete _drag_rect;
5341 }
5342
5343 void
5344 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5345 {
5346         if (_editor->session() == 0) {
5347                 return;
5348         }
5349
5350         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5351
5352         if (!_editor->temp_location) {
5353                 _editor->temp_location = new Location (*_editor->session());
5354         }
5355
5356         switch (_operation) {
5357         case CreateSkipMarker:
5358         case CreateRangeMarker:
5359         case CreateTransportMarker:
5360         case CreateCDMarker:
5361
5362                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5363                         _copy = true;
5364                 } else {
5365                         _copy = false;
5366                 }
5367                 cursor = _editor->cursors()->selector;
5368                 break;
5369         }
5370
5371         Drag::start_grab (event, cursor);
5372
5373         show_verbose_cursor_time (adjusted_current_frame (event));
5374 }
5375
5376 void
5377 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5378 {
5379         framepos_t start = 0;
5380         framepos_t end = 0;
5381         ArdourCanvas::Rectangle *crect;
5382
5383         switch (_operation) {
5384         case CreateSkipMarker:
5385                 crect = _editor->range_bar_drag_rect;
5386                 break;
5387         case CreateRangeMarker:
5388                 crect = _editor->range_bar_drag_rect;
5389                 break;
5390         case CreateTransportMarker:
5391                 crect = _editor->transport_bar_drag_rect;
5392                 break;
5393         case CreateCDMarker:
5394                 crect = _editor->cd_marker_bar_drag_rect;
5395                 break;
5396         default:
5397                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5398                 return;
5399                 break;
5400         }
5401
5402         framepos_t const pf = adjusted_current_frame (event);
5403
5404         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5405                 framepos_t grab = grab_frame ();
5406                 _editor->snap_to (grab);
5407
5408                 if (pf < grab_frame()) {
5409                         start = pf;
5410                         end = grab;
5411                 } else {
5412                         end = pf;
5413                         start = grab;
5414                 }
5415
5416                 /* first drag: Either add to the selection
5417                    or create a new selection.
5418                 */
5419
5420                 if (first_move) {
5421
5422                         _editor->temp_location->set (start, end);
5423
5424                         crect->show ();
5425
5426                         update_item (_editor->temp_location);
5427                         _drag_rect->show();
5428                         //_drag_rect->raise_to_top();
5429
5430                 }
5431         }
5432
5433         if (start != end) {
5434                 _editor->temp_location->set (start, end);
5435
5436                 double x1 = _editor->sample_to_pixel (start);
5437                 double x2 = _editor->sample_to_pixel (end);
5438                 crect->set_x0 (x1);
5439                 crect->set_x1 (x2);
5440
5441                 update_item (_editor->temp_location);
5442         }
5443
5444         show_verbose_cursor_time (pf);
5445
5446 }
5447
5448 void
5449 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5450 {
5451         Location * newloc = 0;
5452         string rangename;
5453         int flags;
5454
5455         if (movement_occurred) {
5456                 motion (event, false);
5457                 _drag_rect->hide();
5458
5459                 switch (_operation) {
5460                 case CreateSkipMarker:
5461                 case CreateRangeMarker:
5462                 case CreateCDMarker:
5463                     {
5464                         XMLNode &before = _editor->session()->locations()->get_state();
5465                         if (_operation == CreateSkipMarker) {
5466                                 _editor->begin_reversible_command (_("new skip marker"));
5467                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5468                                 flags = Location::IsRangeMarker | Location::IsSkip;
5469                                 _editor->range_bar_drag_rect->hide();
5470                         } else if (_operation == CreateCDMarker) {
5471                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5472                                 _editor->begin_reversible_command (_("new CD marker"));
5473                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5474                                 _editor->cd_marker_bar_drag_rect->hide();
5475                         } else {
5476                                 _editor->begin_reversible_command (_("new skip marker"));
5477                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5478                                 flags = Location::IsRangeMarker;
5479                                 _editor->range_bar_drag_rect->hide();
5480                         }
5481                         newloc = new Location (
5482                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5483                                 );
5484
5485                         _editor->session()->locations()->add (newloc, true);
5486                         XMLNode &after = _editor->session()->locations()->get_state();
5487                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5488                         _editor->commit_reversible_command ();
5489                         break;
5490                     }
5491
5492                 case CreateTransportMarker:
5493                         // popup menu to pick loop or punch
5494                         _editor->new_transport_marker_context_menu (&event->button, _item);
5495                         break;
5496                 }
5497
5498         } else {
5499
5500                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5501
5502                 if (_operation == CreateTransportMarker) {
5503
5504                         /* didn't drag, so just locate */
5505
5506                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5507
5508                 } else if (_operation == CreateCDMarker) {
5509
5510                         /* didn't drag, but mark is already created so do
5511                          * nothing */
5512
5513                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5514
5515                         framepos_t start;
5516                         framepos_t end;
5517
5518                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5519
5520                         if (end == max_framepos) {
5521                                 end = _editor->session()->current_end_frame ();
5522                         }
5523
5524                         if (start == max_framepos) {
5525                                 start = _editor->session()->current_start_frame ();
5526                         }
5527
5528                         switch (_editor->mouse_mode) {
5529                         case MouseObject:
5530                                 /* find the two markers on either side and then make the selection from it */
5531                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5532                                 break;
5533
5534                         case MouseRange:
5535                                 /* find the two markers on either side of the click and make the range out of it */
5536                                 _editor->selection->set (start, end);
5537                                 break;
5538
5539                         default:
5540                                 break;
5541                         }
5542                 }
5543         }
5544
5545         _editor->stop_canvas_autoscroll ();
5546 }
5547
5548 void
5549 RangeMarkerBarDrag::aborted (bool movement_occurred)
5550 {
5551         if (movement_occurred) {
5552                 _drag_rect->hide ();
5553         }
5554 }
5555
5556 void
5557 RangeMarkerBarDrag::update_item (Location* location)
5558 {
5559         double const x1 = _editor->sample_to_pixel (location->start());
5560         double const x2 = _editor->sample_to_pixel (location->end());
5561
5562         _drag_rect->set_x0 (x1);
5563         _drag_rect->set_x1 (x2);
5564 }
5565
5566 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5567         : Drag (e, i)
5568         , _cumulative_dx (0)
5569         , _cumulative_dy (0)
5570         , _was_selected (false)
5571 {
5572         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5573
5574         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5575         assert (_primary);
5576         _region = &_primary->region_view ();
5577         _note_height = _region->midi_stream_view()->note_height ();
5578 }
5579
5580 void
5581 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5582 {
5583         Drag::start_grab (event);
5584         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5585
5586         if (!(_was_selected = _primary->selected())) {
5587
5588                 /* tertiary-click means extend selection - we'll do that on button release,
5589                    so don't add it here, because otherwise we make it hard to figure
5590                    out the "extend-to" range.
5591                 */
5592
5593                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5594
5595                 if (!extend) {
5596                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5597
5598                         if (add) {
5599                                 _region->note_selected (_primary, true);
5600                         } else {
5601                                 _editor->get_selection().clear_points();
5602                                 _region->unique_select (_primary);
5603                         }
5604                 }
5605         }
5606 }
5607
5608 /** @return Current total drag x change in frames */
5609 frameoffset_t
5610 NoteDrag::total_dx (const guint state) const
5611 {
5612         /* dx in frames */
5613         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5614
5615         /* primary note time */
5616         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5617
5618         /* new time of the primary note in session frames */
5619         frameoffset_t st = n + dx + snap_delta (state);
5620
5621         framepos_t const rp = _region->region()->position ();
5622
5623         /* prevent the note being dragged earlier than the region's position */
5624         st = max (st, rp);
5625
5626         /* possibly snap and return corresponding delta */
5627
5628         bool snap = true;
5629
5630         if (ArdourKeyboard::indicates_snap (state)) {
5631                 if (_editor->snap_mode () != SnapOff) {
5632                         snap = false;
5633                 }
5634         } else {
5635                 if (_editor->snap_mode () == SnapOff) {
5636                         snap = false;
5637                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5638                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5639                                 snap = true;
5640                         }
5641                 }
5642         }
5643
5644         frameoffset_t ret;
5645         if (snap) {
5646                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5647                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5648         } else {
5649                 ret = st - n - snap_delta (state);
5650         }
5651         return ret;
5652 }
5653
5654 /** @return Current total drag y change in note number */
5655 int8_t
5656 NoteDrag::total_dy () const
5657 {
5658         MidiStreamView* msv = _region->midi_stream_view ();
5659         double const y = _region->midi_view()->y_position ();
5660         /* new current note */
5661         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5662         /* clamp */
5663         n = max (msv->lowest_note(), n);
5664         n = min (msv->highest_note(), n);
5665         /* and work out delta */
5666         return n - msv->y_to_note (grab_y() - y);
5667 }
5668
5669 void
5670 NoteDrag::motion (GdkEvent * event, bool)
5671 {
5672         /* Total change in x and y since the start of the drag */
5673         frameoffset_t const dx = total_dx (event->button.state);
5674         int8_t const dy = total_dy ();
5675
5676         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5677         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5678         double const tdy = -dy * _note_height - _cumulative_dy;
5679
5680         if (tdx || tdy) {
5681                 _cumulative_dx += tdx;
5682                 _cumulative_dy += tdy;
5683
5684                 int8_t note_delta = total_dy();
5685
5686                 _region->move_selection (tdx, tdy, note_delta);
5687
5688                 /* the new note value may be the same as the old one, but we
5689                  * don't know what that means because the selection may have
5690                  * involved more than one note and we might be doing something
5691                  * odd with them. so show the note value anyway, always.
5692                  */
5693
5694                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5695
5696                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5697         }
5698 }
5699
5700 void
5701 NoteDrag::finished (GdkEvent* ev, bool moved)
5702 {
5703         if (!moved) {
5704                 /* no motion - select note */
5705
5706                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5707                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5708
5709                         bool changed = false;
5710
5711                         if (_was_selected) {
5712                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5713                                 if (add) {
5714                                         _region->note_deselected (_primary);
5715                                         changed = true;
5716                                 } else {
5717                                         _editor->get_selection().clear_points();
5718                                         _region->unique_select (_primary);
5719                                         changed = true;
5720                                 }
5721                         } else {
5722                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5723                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5724
5725                                 if (!extend && !add && _region->selection_size() > 1) {
5726                                         _editor->get_selection().clear_points();
5727                                         _region->unique_select (_primary);
5728                                         changed = true;
5729                                 } else if (extend) {
5730                                         _region->note_selected (_primary, true, true);
5731                                         changed = true;
5732                                 } else {
5733                                         /* it was added during button press */
5734                                         changed = true;
5735
5736                                 }
5737                         }
5738
5739                         if (changed) {
5740                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5741                                 _editor->commit_reversible_selection_op();
5742                         }
5743                 }
5744         } else {
5745                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5746         }
5747 }
5748
5749 void
5750 NoteDrag::aborted (bool)
5751 {
5752         /* XXX: TODO */
5753 }
5754
5755 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5756 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5757         : Drag (editor, atv->base_item ())
5758         , _ranges (r)
5759         , _y_origin (atv->y_position())
5760         , _nothing_to_drag (false)
5761 {
5762         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5763         setup (atv->lines ());
5764 }
5765
5766 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5767 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5768         : Drag (editor, rv->get_canvas_group ())
5769         , _ranges (r)
5770         , _y_origin (rv->get_time_axis_view().y_position())
5771         , _nothing_to_drag (false)
5772         , _integral (false)
5773 {
5774         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5775
5776         list<boost::shared_ptr<AutomationLine> > lines;
5777
5778         AudioRegionView*      audio_view;
5779         AutomationRegionView* automation_view;
5780         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5781                 lines.push_back (audio_view->get_gain_line ());
5782         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5783                 lines.push_back (automation_view->line ());
5784                 _integral = true;
5785         } else {
5786                 error << _("Automation range drag created for invalid region type") << endmsg;
5787         }
5788
5789         setup (lines);
5790 }
5791
5792 /** @param lines AutomationLines to drag.
5793  *  @param offset Offset from the session start to the points in the AutomationLines.
5794  */
5795 void
5796 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5797 {
5798         /* find the lines that overlap the ranges being dragged */
5799         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5800         while (i != lines.end ()) {
5801                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5802                 ++j;
5803
5804                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5805
5806                 /* check this range against all the AudioRanges that we are using */
5807                 list<AudioRange>::const_iterator k = _ranges.begin ();
5808                 while (k != _ranges.end()) {
5809                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5810                                 break;
5811                         }
5812                         ++k;
5813                 }
5814
5815                 /* add it to our list if it overlaps at all */
5816                 if (k != _ranges.end()) {
5817                         Line n;
5818                         n.line = *i;
5819                         n.state = 0;
5820                         n.range = r;
5821                         _lines.push_back (n);
5822                 }
5823
5824                 i = j;
5825         }
5826
5827         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5828 }
5829
5830 double
5831 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5832 {
5833         return 1.0 - ((global_y - _y_origin) / line->height());
5834 }
5835
5836 double
5837 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5838 {
5839         const double v = list->eval(x);
5840         return _integral ? rint(v) : v;
5841 }
5842
5843 void
5844 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5845 {
5846         Drag::start_grab (event, cursor);
5847
5848         /* Get line states before we start changing things */
5849         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5850                 i->state = &i->line->get_state ();
5851                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5852         }
5853
5854         if (_ranges.empty()) {
5855
5856                 /* No selected time ranges: drag all points */
5857                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5858                         uint32_t const N = i->line->npoints ();
5859                         for (uint32_t j = 0; j < N; ++j) {
5860                                 i->points.push_back (i->line->nth (j));
5861                         }
5862                 }
5863
5864         }
5865
5866         if (_nothing_to_drag) {
5867                 return;
5868         }
5869 }
5870
5871 void
5872 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5873 {
5874         if (_nothing_to_drag && !first_move) {
5875                 return;
5876         }
5877
5878         if (first_move) {
5879                 _editor->begin_reversible_command (_("automation range move"));
5880
5881                 if (!_ranges.empty()) {
5882
5883                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5884
5885                                 framecnt_t const half = (i->start + i->end) / 2;
5886
5887                                 /* find the line that this audio range starts in */
5888                                 list<Line>::iterator j = _lines.begin();
5889                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5890                                         ++j;
5891                                 }
5892
5893                                 if (j != _lines.end()) {
5894                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5895
5896                                 /* j is the line that this audio range starts in; fade into it;
5897                                    64 samples length plucked out of thin air.
5898                                 */
5899
5900                                         framepos_t a = i->start + 64;
5901                                         if (a > half) {
5902                                                 a = half;
5903                                         }
5904
5905                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5906                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5907
5908                                         XMLNode &before = the_list->get_state();
5909                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5910                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5911
5912                                         if (add_p || add_q) {
5913                                                 _editor->session()->add_command (
5914                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5915                                         }
5916                                 }
5917
5918                                 /* same thing for the end */
5919
5920                                 j = _lines.begin();
5921                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5922                                         ++j;
5923                                 }
5924
5925                                 if (j != _lines.end()) {
5926                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5927
5928                                         /* j is the line that this audio range starts in; fade out of it;
5929                                            64 samples length plucked out of thin air.
5930                                         */
5931
5932                                         framepos_t b = i->end - 64;
5933                                         if (b < half) {
5934                                                 b = half;
5935                                         }
5936
5937                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5938                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5939
5940                                         XMLNode &before = the_list->get_state();
5941                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5942                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5943
5944                                         if (add_p || add_q) {
5945                                                 _editor->session()->add_command (
5946                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5947                                         }
5948                                 }
5949                         }
5950
5951                         _nothing_to_drag = true;
5952
5953                         /* Find all the points that should be dragged and put them in the relevant
5954                            points lists in the Line structs.
5955                         */
5956
5957                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5958
5959                                 uint32_t const N = i->line->npoints ();
5960                                 for (uint32_t j = 0; j < N; ++j) {
5961
5962                                         /* here's a control point on this line */
5963                                         ControlPoint* p = i->line->nth (j);
5964                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5965
5966                                         /* see if it's inside a range */
5967                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5968                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5969                                                 ++k;
5970                                         }
5971
5972                                         if (k != _ranges.end()) {
5973                                                 /* dragging this point */
5974                                                 _nothing_to_drag = false;
5975                                                 i->points.push_back (p);
5976                                         }
5977                                 }
5978                         }
5979                 }
5980
5981                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5982                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5983                 }
5984         }
5985
5986         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5987                 float const f = y_fraction (l->line, current_pointer_y());
5988                 /* we are ignoring x position for this drag, so we can just pass in anything */
5989                 pair<double, float> result;
5990                 uint32_t ignored;
5991                 result = l->line->drag_motion (0, f, true, false, ignored);
5992                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5993         }
5994 }
5995
5996 void
5997 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5998 {
5999         if (_nothing_to_drag || !motion_occurred) {
6000                 return;
6001         }
6002
6003         motion (event, false);
6004         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6005                 i->line->end_drag (false, 0);
6006         }
6007
6008         _editor->commit_reversible_command ();
6009 }
6010
6011 void
6012 AutomationRangeDrag::aborted (bool)
6013 {
6014         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6015                 i->line->reset ();
6016         }
6017 }
6018
6019 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
6020         : view (v)
6021         , initial_time_axis_view (itav)
6022 {
6023         /* note that time_axis_view may be null if the regionview was created
6024          * as part of a copy operation.
6025          */
6026         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
6027         layer = v->region()->layer ();
6028         initial_y = v->get_canvas_group()->position().y;
6029         initial_playlist = v->region()->playlist ();
6030         initial_position = v->region()->position ();
6031         initial_end = v->region()->position () + v->region()->length ();
6032 }
6033
6034 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
6035         : Drag (e, i->canvas_item ())
6036         , _region_view (r)
6037         , _patch_change (i)
6038         , _cumulative_dx (0)
6039 {
6040         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
6041                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
6042                                                    grab_frame()));
6043 }
6044
6045 void
6046 PatchChangeDrag::motion (GdkEvent* ev, bool)
6047 {
6048         framepos_t f = adjusted_current_frame (ev);
6049         boost::shared_ptr<Region> r = _region_view->region ();
6050         f = max (f, r->position ());
6051         f = min (f, r->last_frame ());
6052
6053         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6054         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6055         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6056         _cumulative_dx = dxu;
6057 }
6058
6059 void
6060 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6061 {
6062         if (!movement_occurred) {
6063                 return;
6064         }
6065
6066         boost::shared_ptr<Region> r (_region_view->region ());
6067         framepos_t f = adjusted_current_frame (ev);
6068         f = max (f, r->position ());
6069         f = min (f, r->last_frame ());
6070
6071         _region_view->move_patch_change (
6072                 *_patch_change,
6073                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6074                 );
6075 }
6076
6077 void
6078 PatchChangeDrag::aborted (bool)
6079 {
6080         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6081 }
6082
6083 void
6084 PatchChangeDrag::setup_pointer_frame_offset ()
6085 {
6086         boost::shared_ptr<Region> region = _region_view->region ();
6087         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6088 }
6089
6090 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6091         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6092         , _region_view (rv)
6093 {
6094
6095 }
6096
6097 void
6098 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6099 {
6100         _region_view->update_drag_selection (
6101                 x1, x2, y1, y2,
6102                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6103 }
6104
6105 void
6106 MidiRubberbandSelectDrag::deselect_things ()
6107 {
6108         /* XXX */
6109 }
6110
6111 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6112         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6113         , _region_view (rv)
6114 {
6115         _vertical_only = true;
6116 }
6117
6118 void
6119 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6120 {
6121         double const y = _region_view->midi_view()->y_position ();
6122
6123         y1 = max (0.0, y1 - y);
6124         y2 = max (0.0, y2 - y);
6125
6126         _region_view->update_vertical_drag_selection (
6127                 y1,
6128                 y2,
6129                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6130                 );
6131 }
6132
6133 void
6134 MidiVerticalSelectDrag::deselect_things ()
6135 {
6136         /* XXX */
6137 }
6138
6139 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6140         : RubberbandSelectDrag (e, i)
6141 {
6142
6143 }
6144
6145 void
6146 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6147 {
6148         if (drag_in_progress) {
6149                 /* We just want to select things at the end of the drag, not during it */
6150                 return;
6151         }
6152
6153         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6154
6155         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6156
6157         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6158
6159         _editor->commit_reversible_selection_op ();
6160 }
6161
6162 void
6163 EditorRubberbandSelectDrag::deselect_things ()
6164 {
6165         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6166
6167         _editor->selection->clear_tracks();
6168         _editor->selection->clear_regions();
6169         _editor->selection->clear_points ();
6170         _editor->selection->clear_lines ();
6171         _editor->selection->clear_midi_notes ();
6172
6173         _editor->commit_reversible_selection_op();
6174 }
6175
6176 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6177         : Drag (e, i)
6178         , _region_view (rv)
6179         , _drag_rect (0)
6180 {
6181         _note[0] = _note[1] = 0;
6182 }
6183
6184 NoteCreateDrag::~NoteCreateDrag ()
6185 {
6186         delete _drag_rect;
6187 }
6188
6189 framecnt_t
6190 NoteCreateDrag::grid_frames (framepos_t t) const
6191 {
6192         bool success;
6193         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6194         if (!success) {
6195                 grid_beats = Evoral::Beats(1);
6196         }
6197
6198         return _region_view->region_beats_to_region_frames (grid_beats);
6199 }
6200
6201 void
6202 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6203 {
6204         Drag::start_grab (event, cursor);
6205
6206         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6207
6208         framepos_t pf = _drags->current_pointer_frame ();
6209         framecnt_t const g = grid_frames (pf);
6210
6211         /* Hack so that we always snap to the note that we are over, instead of snapping
6212            to the next one if we're more than halfway through the one we're over.
6213         */
6214         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6215                 pf -= g / 2;
6216         }
6217
6218         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6219         _note[1] = _note[0];
6220
6221         MidiStreamView* sv = _region_view->midi_stream_view ();
6222         double const x = _editor->sample_to_pixel (_note[0]);
6223         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6224
6225         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6226         _drag_rect->set_outline_all ();
6227         _drag_rect->set_outline_color (0xffffff99);
6228         _drag_rect->set_fill_color (0xffffff66);
6229 }
6230
6231 void
6232 NoteCreateDrag::motion (GdkEvent* event, bool)
6233 {
6234         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6235         double const x0 = _editor->sample_to_pixel (_note[0]);
6236         double const x1 = _editor->sample_to_pixel (_note[1]);
6237         _drag_rect->set_x0 (std::min(x0, x1));
6238         _drag_rect->set_x1 (std::max(x0, x1));
6239 }
6240
6241 void
6242 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6243 {
6244         if (!had_movement) {
6245                 return;
6246         }
6247
6248         framepos_t const start = min (_note[0], _note[1]);
6249         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6250
6251         framecnt_t const g = grid_frames (start);
6252         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6253
6254         if (_editor->snap_mode() == SnapNormal && length < g) {
6255                 length = g;
6256         }
6257
6258         Evoral::Beats length_beats = max (
6259                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6260
6261         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6262 }
6263
6264 double
6265 NoteCreateDrag::y_to_region (double y) const
6266 {
6267         double x = 0;
6268         _region_view->get_canvas_group()->canvas_to_item (x, y);
6269         return y;
6270 }
6271
6272 void
6273 NoteCreateDrag::aborted (bool)
6274 {
6275
6276 }
6277
6278 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6279         : Drag (e, i)
6280         , arv (rv)
6281         , start (start_yn)
6282 {
6283         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6284 }
6285
6286 void
6287 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6288 {
6289         Drag::start_grab (event, cursor);
6290 }
6291
6292 void
6293 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6294 {
6295         double distance;
6296         double new_length;
6297         framecnt_t len;
6298
6299         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6300
6301         if (start) {
6302                 distance = _drags->current_pointer_x() - grab_x();
6303                 len = ar->fade_in()->back()->when;
6304         } else {
6305                 distance = grab_x() - _drags->current_pointer_x();
6306                 len = ar->fade_out()->back()->when;
6307         }
6308
6309         /* how long should it be ? */
6310
6311         new_length = len + _editor->pixel_to_sample (distance);
6312
6313         /* now check with the region that this is legal */
6314
6315         new_length = ar->verify_xfade_bounds (new_length, start);
6316
6317         if (start) {
6318                 arv->reset_fade_in_shape_width (ar, new_length);
6319         } else {
6320                 arv->reset_fade_out_shape_width (ar, new_length);
6321         }
6322 }
6323
6324 void
6325 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6326 {
6327         double distance;
6328         double new_length;
6329         framecnt_t len;
6330
6331         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6332
6333         if (start) {
6334                 distance = _drags->current_pointer_x() - grab_x();
6335                 len = ar->fade_in()->back()->when;
6336         } else {
6337                 distance = grab_x() - _drags->current_pointer_x();
6338                 len = ar->fade_out()->back()->when;
6339         }
6340
6341         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6342
6343         _editor->begin_reversible_command ("xfade trim");
6344         ar->playlist()->clear_owned_changes ();
6345
6346         if (start) {
6347                 ar->set_fade_in_length (new_length);
6348         } else {
6349                 ar->set_fade_out_length (new_length);
6350         }
6351
6352         /* Adjusting the xfade may affect other regions in the playlist, so we need
6353            to get undo Commands from the whole playlist rather than just the
6354            region.
6355         */
6356
6357         vector<Command*> cmds;
6358         ar->playlist()->rdiff (cmds);
6359         _editor->session()->add_commands (cmds);
6360         _editor->commit_reversible_command ();
6361
6362 }
6363
6364 void
6365 CrossfadeEdgeDrag::aborted (bool)
6366 {
6367         if (start) {
6368                 // arv->redraw_start_xfade ();
6369         } else {
6370                 // arv->redraw_end_xfade ();
6371         }
6372 }
6373
6374 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6375         : Drag (e, item, true)
6376         , line (new EditorCursor (*e))
6377 {
6378         line->set_position (pos);
6379         line->show ();
6380 }
6381
6382 RegionCutDrag::~RegionCutDrag ()
6383 {
6384         delete line;
6385 }
6386
6387 void
6388 RegionCutDrag::motion (GdkEvent*, bool)
6389 {
6390         framepos_t where = _drags->current_pointer_frame();
6391         _editor->snap_to (where);
6392
6393         line->set_position (where);
6394 }
6395
6396 void
6397 RegionCutDrag::finished (GdkEvent*, bool)
6398 {
6399         _editor->get_track_canvas()->canvas()->re_enter();
6400
6401         framepos_t pos = _drags->current_pointer_frame();
6402
6403         line->hide ();
6404
6405         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6406
6407         if (rs.empty()) {
6408                 return;
6409         }
6410
6411         _editor->split_regions_at (pos, rs);
6412 }
6413
6414 void
6415 RegionCutDrag::aborted (bool)
6416 {
6417 }