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         , _old_snap_type (e->snap_type())
3121         , _old_snap_mode (e->snap_mode())
3122         , before_state (0)
3123 {
3124         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3125         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3126         assert (_marker);
3127         _real_section = &_marker->meter();
3128
3129 }
3130
3131 void
3132 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3133 {
3134         Drag::start_grab (event, cursor);
3135         show_verbose_cursor_time (adjusted_current_frame(event));
3136 }
3137
3138 void
3139 MeterMarkerDrag::setup_pointer_frame_offset ()
3140 {
3141         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3142 }
3143
3144 void
3145 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3146 {
3147         if (first_move) {
3148                 // create a dummy marker to catch events, then hide it.
3149
3150                 char name[64];
3151                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3152
3153                 _marker = new MeterMarker (
3154                         *_editor,
3155                         *_editor->meter_group,
3156                         UIConfiguration::instance().color ("meter marker"),
3157                         name,
3158                         *new MeterSection (_marker->meter())
3159                 );
3160
3161                 /* use the new marker for the grab */
3162                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3163                 _marker->hide();
3164
3165                 TempoMap& map (_editor->session()->tempo_map());
3166                 /* get current state */
3167                 before_state = &map.get_state();
3168
3169                 if (!_copy) {
3170                         _editor->begin_reversible_command (_("move meter mark"));
3171                 } else {
3172                         _editor->begin_reversible_command (_("copy meter mark"));
3173
3174                         Timecode::BBT_Time bbt = _real_section->bbt();
3175
3176                         /* we can't add a meter where one currently exists */
3177                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3178                                 ++bbt.bars;
3179                         } else {
3180                                 --bbt.bars;
3181                         }
3182                         const double beat = map.beat_at_bbt (bbt);
3183                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3184                                                        , beat, bbt, map.frame_at_bbt (bbt), _real_section->position_lock_style());
3185
3186                 }
3187                 /* only snap to bars */
3188                 _editor->set_snap_to (SnapToBar);
3189                 _editor->set_snap_mode (SnapNormal);    }
3190
3191         framepos_t pf = adjusted_current_frame (event);
3192
3193         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3194                 /* never snap to music for audio locked */
3195                 pf = adjusted_current_frame (event, false);
3196         }
3197
3198         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3199
3200         /* fake marker meeds to stay under the mouse, unlike the real one. */
3201         _marker->set_position (adjusted_current_frame (event, false));
3202
3203         show_verbose_cursor_time (_real_section->frame());
3204 }
3205
3206 void
3207 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3208 {
3209         if (!movement_occurred) {
3210                 if (was_double_click()) {
3211                         _editor->edit_meter_marker (*_marker);
3212                 }
3213                 return;
3214         }
3215
3216         /* reinstate old snap setting */
3217         _editor->set_snap_to (_old_snap_type);
3218         _editor->set_snap_mode (_old_snap_mode);
3219
3220         TempoMap& map (_editor->session()->tempo_map());
3221
3222         XMLNode &after = map.get_state();
3223         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3224         _editor->commit_reversible_command ();
3225
3226         // delete the dummy marker we used for visual representation while moving.
3227         // a new visual marker will show up automatically.
3228         delete _marker;
3229 }
3230
3231 void
3232 MeterMarkerDrag::aborted (bool moved)
3233 {
3234         _marker->set_position (_marker->meter().frame ());
3235         if (moved) {
3236                 /* reinstate old snap setting */
3237                 _editor->set_snap_to (_old_snap_type);
3238                 _editor->set_snap_mode (_old_snap_mode);
3239
3240                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3241                 // delete the dummy marker we used for visual representation while moving.
3242                 // a new visual marker will show up automatically.
3243                 delete _marker;
3244         }
3245 }
3246
3247 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3248         : Drag (e, i)
3249         , _copy (c)
3250         , before_state (0)
3251 {
3252         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3253
3254         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3255         _real_section = &_marker->tempo();
3256         _movable = _real_section->movable();
3257         assert (_marker);
3258 }
3259
3260 void
3261 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3262 {
3263         Drag::start_grab (event, cursor);
3264         if (!_real_section->active()) {
3265                 show_verbose_cursor_text (_("inactive"));
3266         } else {
3267                 show_verbose_cursor_time (adjusted_current_frame (event));
3268         }
3269 }
3270
3271 void
3272 TempoMarkerDrag::setup_pointer_frame_offset ()
3273 {
3274         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3275 }
3276
3277 void
3278 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3279 {
3280         if (!_real_section->active()) {
3281                 return;
3282         }
3283
3284         if (first_move) {
3285
3286                 // mvc drag - create a dummy marker to catch events, hide it.
3287
3288                 char name[64];
3289                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3290
3291                 TempoSection section (_marker->tempo());
3292
3293                 _marker = new TempoMarker (
3294                         *_editor,
3295                         *_editor->tempo_group,
3296                         UIConfiguration::instance().color ("tempo marker"),
3297                         name,
3298                         *new TempoSection (_marker->tempo())
3299                         );
3300
3301                 /* use the new marker for the grab */
3302                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3303                 _marker->hide();
3304
3305                 TempoMap& map (_editor->session()->tempo_map());
3306                 /* get current state */
3307                 before_state = &map.get_state();
3308
3309                 if (!_copy) {
3310                         _editor->begin_reversible_command (_("move tempo mark"));
3311
3312                 } else {
3313                         const framepos_t frame = adjusted_current_frame (event) + 1;
3314
3315                         _editor->begin_reversible_command (_("copy tempo mark"));
3316
3317                         if (_real_section->position_lock_style() == MusicTime) {
3318                                 _real_section = map.add_tempo (_marker->tempo(), map.pulse_at_frame (frame), 0, _real_section->type(), MusicTime);
3319                         } else {
3320                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3321                         }
3322                 }
3323
3324         }
3325
3326         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3327                 /* use vertical movement to alter tempo .. should be log */
3328                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3329                 stringstream strs;
3330
3331                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3332                 strs << new_bpm;
3333                 show_verbose_cursor_text (strs.str());
3334
3335         } else if (_movable && !_real_section->locked_to_meter()) {
3336                 TempoMap& map (_editor->session()->tempo_map());
3337                 const bool was_music = _real_section->position_lock_style() == MusicTime;
3338
3339                 const framepos_t pf = adjusted_current_frame (event);
3340
3341                 if (!_editor->snap_musical()) {
3342
3343                         if (was_music) {
3344                                 _real_section->set_position_lock_style (AudioTime);
3345                         }
3346
3347                         map.gui_move_tempo (_real_section, pf);
3348
3349                         if (was_music) {
3350                                 _real_section->set_position_lock_style (MusicTime);
3351                         }
3352
3353                 } else {
3354
3355                         if (!was_music) {
3356                                 _real_section->set_position_lock_style (MusicTime);
3357                         }
3358
3359                         map.gui_move_tempo (_real_section, pf);
3360
3361                         if (!was_music) {
3362                                 _real_section->set_position_lock_style (AudioTime);
3363                         }
3364                 }
3365
3366                 show_verbose_cursor_time (_real_section->frame());
3367         }
3368
3369         /* this has moved the bar lines themselves, so recalibrate the offset */
3370         setup_pointer_frame_offset();
3371
3372         _marker->set_position (adjusted_current_frame (event, false));
3373 }
3374
3375 void
3376 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3377 {
3378         if (!_real_section->active()) {
3379                 return;
3380         }
3381         if (!movement_occurred) {
3382                 if (was_double_click()) {
3383                         _editor->edit_tempo_marker (*_marker);
3384                 }
3385                 return;
3386         }
3387
3388         TempoMap& map (_editor->session()->tempo_map());
3389
3390         XMLNode &after = map.get_state();
3391         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3392         _editor->commit_reversible_command ();
3393
3394         // delete the dummy marker we used for visual representation while moving.
3395         // a new visual marker will show up automatically.
3396         delete _marker;
3397 }
3398
3399 void
3400 TempoMarkerDrag::aborted (bool moved)
3401 {
3402         _marker->set_position (_marker->tempo().frame());
3403         if (moved) {
3404                 TempoMap& map (_editor->session()->tempo_map());
3405                 map.set_state (*before_state, Stateful::current_state_version);
3406                 // delete the dummy marker we used for visual representation while moving.
3407                 // a new visual marker will show up automatically.
3408                 delete _marker;
3409         }
3410 }
3411
3412 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3413         : Drag (e, i)
3414         , _pulse (0.0)
3415         , _beat (0.0)
3416         , _tempo (0)
3417         , before_state (0)
3418 {
3419         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3420
3421 }
3422
3423 void
3424 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3425 {
3426         Drag::start_grab (event, cursor);
3427
3428         TempoMap& map (_editor->session()->tempo_map());
3429         ostringstream sstr;
3430
3431         _tempo = const_cast<TempoSection*> (&map.tempo_section_at_frame (raw_grab_frame()));
3432         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (adjusted_current_frame (event)).beats_per_minute() << "\n";
3433         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3434         show_verbose_cursor_text (sstr.str());
3435         finished (event, false);
3436 }
3437
3438 void
3439 BBTRulerDrag::setup_pointer_frame_offset ()
3440 {
3441         TempoMap& map (_editor->session()->tempo_map());
3442         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3443         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3444         if (divisions > 0) {
3445                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3446         } else {
3447                 /* while it makes some sense for the user to determine the division to 'grab',
3448                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3449                    and the result over steep tempo curves. Use sixteenths.
3450                 */
3451                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3452         }
3453         _pulse = map.pulse_at_beat (_beat);
3454         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3455 }
3456
3457 void
3458 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3459 {
3460         TempoMap& map (_editor->session()->tempo_map());
3461
3462         if (first_move) {
3463                 /* get current state */
3464                 before_state = &map.get_state();
3465                 _editor->begin_reversible_command (_("dilate tempo"));
3466         }
3467
3468         framepos_t const pf = adjusted_current_frame (event, false);
3469
3470         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3471                 /* adjust previous tempo to match pointer frame */
3472                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3473         }
3474         ostringstream sstr;
3475         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (pf).beats_per_minute() << "\n";
3476         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3477         show_verbose_cursor_text (sstr.str());
3478 }
3479
3480 void
3481 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3482 {
3483         if (!movement_occurred) {
3484                 return;
3485         }
3486
3487         TempoMap& map (_editor->session()->tempo_map());
3488
3489         XMLNode &after = map.get_state();
3490         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3491         _editor->commit_reversible_command ();
3492 }
3493
3494 void
3495 BBTRulerDrag::aborted (bool moved)
3496 {
3497         if (moved) {
3498                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3499         }
3500 }
3501
3502
3503 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3504         : Drag (e, &c.track_canvas_item(), false)
3505         , _cursor (c)
3506         , _stop (s)
3507         , _grab_zoom (0.0)
3508 {
3509         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3510 }
3511
3512 /** Do all the things we do when dragging the playhead to make it look as though
3513  *  we have located, without actually doing the locate (because that would cause
3514  *  the diskstream buffers to be refilled, which is too slow).
3515  */
3516 void
3517 CursorDrag::fake_locate (framepos_t t)
3518 {
3519         if (_editor->session () == 0) {
3520                 return;
3521         }
3522
3523         _editor->playhead_cursor->set_position (t);
3524
3525         Session* s = _editor->session ();
3526         if (s->timecode_transmission_suspended ()) {
3527                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3528                 /* This is asynchronous so it will be sent "now"
3529                  */
3530                 s->send_mmc_locate (f);
3531                 /* These are synchronous and will be sent during the next
3532                    process cycle
3533                 */
3534                 s->queue_full_time_code ();
3535                 s->queue_song_position_pointer ();
3536         }
3537
3538         show_verbose_cursor_time (t);
3539         _editor->UpdateAllTransportClocks (t);
3540 }
3541
3542 void
3543 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3544 {
3545         Drag::start_grab (event, c);
3546         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3547
3548         _grab_zoom = _editor->samples_per_pixel;
3549
3550         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3551
3552         _editor->snap_to_with_modifier (where, event);
3553
3554         _editor->_dragging_playhead = true;
3555
3556         Session* s = _editor->session ();
3557
3558         /* grab the track canvas item as well */
3559
3560         _cursor.track_canvas_item().grab();
3561
3562         if (s) {
3563                 if (_was_rolling && _stop) {
3564                         s->request_stop ();
3565                 }
3566
3567                 if (s->is_auditioning()) {
3568                         s->cancel_audition ();
3569                 }
3570
3571
3572                 if (AudioEngine::instance()->connected()) {
3573
3574                         /* do this only if we're the engine is connected
3575                          * because otherwise this request will never be
3576                          * serviced and we'll busy wait forever. likewise,
3577                          * notice if we are disconnected while waiting for the
3578                          * request to be serviced.
3579                          */
3580
3581                         s->request_suspend_timecode_transmission ();
3582                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3583                                 /* twiddle our thumbs */
3584                         }
3585                 }
3586         }
3587
3588         fake_locate (where - snap_delta (event->button.state));
3589 }
3590
3591 void
3592 CursorDrag::motion (GdkEvent* event, bool)
3593 {
3594         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3595         _editor->snap_to_with_modifier (where, event);
3596         if (where != last_pointer_frame()) {
3597                 fake_locate (where - snap_delta (event->button.state));
3598         }
3599 }
3600
3601 void
3602 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3603 {
3604         _editor->_dragging_playhead = false;
3605
3606         _cursor.track_canvas_item().ungrab();
3607
3608         if (!movement_occurred && _stop) {
3609                 return;
3610         }
3611
3612         motion (event, false);
3613
3614         Session* s = _editor->session ();
3615         if (s) {
3616                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3617                 _editor->_pending_locate_request = true;
3618                 s->request_resume_timecode_transmission ();
3619         }
3620 }
3621
3622 void
3623 CursorDrag::aborted (bool)
3624 {
3625         _cursor.track_canvas_item().ungrab();
3626
3627         if (_editor->_dragging_playhead) {
3628                 _editor->session()->request_resume_timecode_transmission ();
3629                 _editor->_dragging_playhead = false;
3630         }
3631
3632         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3633 }
3634
3635 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3636         : RegionDrag (e, i, p, v)
3637 {
3638         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3639 }
3640
3641 void
3642 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3643 {
3644         Drag::start_grab (event, cursor);
3645
3646         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3647         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3648         setup_snap_delta (r->position ());
3649
3650         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3651 }
3652
3653 void
3654 FadeInDrag::setup_pointer_frame_offset ()
3655 {
3656         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3657         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3658         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3659 }
3660
3661 void
3662 FadeInDrag::motion (GdkEvent* event, bool)
3663 {
3664         framecnt_t fade_length;
3665
3666         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3667         _editor->snap_to_with_modifier (pos, event);
3668         pos -= snap_delta (event->button.state);
3669
3670         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3671
3672         if (pos < (region->position() + 64)) {
3673                 fade_length = 64; // this should be a minimum defined somewhere
3674         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3675                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3676         } else {
3677                 fade_length = pos - region->position();
3678         }
3679
3680         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3681
3682                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3683
3684                 if (!tmp) {
3685                         continue;
3686                 }
3687
3688                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3689         }
3690
3691         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3692 }
3693
3694 void
3695 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3696 {
3697         if (!movement_occurred) {
3698                 return;
3699         }
3700
3701         framecnt_t fade_length;
3702         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3703         _editor->snap_to_with_modifier (pos, event);
3704         pos -= snap_delta (event->button.state);
3705
3706         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3707
3708         if (pos < (region->position() + 64)) {
3709                 fade_length = 64; // this should be a minimum defined somewhere
3710         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3711                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3712         } else {
3713                 fade_length = pos - region->position();
3714         }
3715
3716         bool in_command = false;
3717
3718         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3719
3720                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3721
3722                 if (!tmp) {
3723                         continue;
3724                 }
3725
3726                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3727                 XMLNode &before = alist->get_state();
3728
3729                 tmp->audio_region()->set_fade_in_length (fade_length);
3730                 tmp->audio_region()->set_fade_in_active (true);
3731
3732                 if (!in_command) {
3733                         _editor->begin_reversible_command (_("change fade in length"));
3734                         in_command = true;
3735                 }
3736                 XMLNode &after = alist->get_state();
3737                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3738         }
3739
3740         if (in_command) {
3741                 _editor->commit_reversible_command ();
3742         }
3743 }
3744
3745 void
3746 FadeInDrag::aborted (bool)
3747 {
3748         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3749                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3750
3751                 if (!tmp) {
3752                         continue;
3753                 }
3754
3755                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3756         }
3757 }
3758
3759 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3760         : RegionDrag (e, i, p, v)
3761 {
3762         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3763 }
3764
3765 void
3766 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3767 {
3768         Drag::start_grab (event, cursor);
3769
3770         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3771         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3772         setup_snap_delta (r->last_frame ());
3773
3774         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3775 }
3776
3777 void
3778 FadeOutDrag::setup_pointer_frame_offset ()
3779 {
3780         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3781         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3782         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3783 }
3784
3785 void
3786 FadeOutDrag::motion (GdkEvent* event, bool)
3787 {
3788         framecnt_t fade_length;
3789
3790         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3791         _editor->snap_to_with_modifier (pos, event);
3792         pos -= snap_delta (event->button.state);
3793
3794         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3795
3796         if (pos > (region->last_frame() - 64)) {
3797                 fade_length = 64; // this should really be a minimum fade defined somewhere
3798         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3799                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3800         } else {
3801                 fade_length = region->last_frame() - pos;
3802         }
3803
3804         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3805
3806                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3807
3808                 if (!tmp) {
3809                         continue;
3810                 }
3811
3812                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3813         }
3814
3815         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3816 }
3817
3818 void
3819 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3820 {
3821         if (!movement_occurred) {
3822                 return;
3823         }
3824
3825         framecnt_t fade_length;
3826
3827         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3828         _editor->snap_to_with_modifier (pos, event);
3829         pos -= snap_delta (event->button.state);
3830
3831         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3832
3833         if (pos > (region->last_frame() - 64)) {
3834                 fade_length = 64; // this should really be a minimum fade defined somewhere
3835         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3836                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3837         } else {
3838                 fade_length = region->last_frame() - pos;
3839         }
3840
3841         bool in_command = false;
3842
3843         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3844
3845                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3846
3847                 if (!tmp) {
3848                         continue;
3849                 }
3850
3851                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3852                 XMLNode &before = alist->get_state();
3853
3854                 tmp->audio_region()->set_fade_out_length (fade_length);
3855                 tmp->audio_region()->set_fade_out_active (true);
3856
3857                 if (!in_command) {
3858                         _editor->begin_reversible_command (_("change fade out length"));
3859                         in_command = true;
3860                 }
3861                 XMLNode &after = alist->get_state();
3862                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3863         }
3864
3865         if (in_command) {
3866                 _editor->commit_reversible_command ();
3867         }
3868 }
3869
3870 void
3871 FadeOutDrag::aborted (bool)
3872 {
3873         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3874                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3875
3876                 if (!tmp) {
3877                         continue;
3878                 }
3879
3880                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3881         }
3882 }
3883
3884 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3885         : Drag (e, i)
3886         , _selection_changed (false)
3887 {
3888         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3889         Gtk::Window* toplevel = _editor->current_toplevel();
3890         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3891
3892         assert (_marker);
3893
3894         _points.push_back (ArdourCanvas::Duple (0, 0));
3895
3896         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3897 }
3898
3899 MarkerDrag::~MarkerDrag ()
3900 {
3901         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3902                 delete i->location;
3903         }
3904 }
3905
3906 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3907 {
3908         location = new Location (*l);
3909         markers.push_back (m);
3910         move_both = false;
3911 }
3912
3913 void
3914 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3915 {
3916         Drag::start_grab (event, cursor);
3917
3918         bool is_start;
3919
3920         Location *location = _editor->find_location_from_marker (_marker, is_start);
3921         _editor->_dragging_edit_point = true;
3922
3923         update_item (location);
3924
3925         // _drag_line->show();
3926         // _line->raise_to_top();
3927
3928         if (is_start) {
3929                 show_verbose_cursor_time (location->start());
3930         } else {
3931                 show_verbose_cursor_time (location->end());
3932         }
3933         setup_snap_delta (is_start ? location->start() : location->end());
3934
3935         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3936
3937         switch (op) {
3938         case Selection::Toggle:
3939                 /* we toggle on the button release */
3940                 break;
3941         case Selection::Set:
3942                 if (!_editor->selection->selected (_marker)) {
3943                         _editor->selection->set (_marker);
3944                         _selection_changed = true;
3945                 }
3946                 break;
3947         case Selection::Extend:
3948         {
3949                 Locations::LocationList ll;
3950                 list<ArdourMarker*> to_add;
3951                 framepos_t s, e;
3952                 _editor->selection->markers.range (s, e);
3953                 s = min (_marker->position(), s);
3954                 e = max (_marker->position(), e);
3955                 s = min (s, e);
3956                 e = max (s, e);
3957                 if (e < max_framepos) {
3958                         ++e;
3959                 }
3960                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3961                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3962                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
3963                         if (lm) {
3964                                 if (lm->start) {
3965                                         to_add.push_back (lm->start);
3966                                 }
3967                                 if (lm->end) {
3968                                         to_add.push_back (lm->end);
3969                                 }
3970                         }
3971                 }
3972                 if (!to_add.empty()) {
3973                         _editor->selection->add (to_add);
3974                         _selection_changed = true;
3975                 }
3976                 break;
3977         }
3978         case Selection::Add:
3979                 _editor->selection->add (_marker);
3980                 _selection_changed = true;
3981
3982                 break;
3983         }
3984
3985         /* Set up copies for us to manipulate during the drag
3986          */
3987
3988         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
3989
3990                 Location* l = _editor->find_location_from_marker (*i, is_start);
3991
3992                 if (!l) {
3993                         continue;
3994                 }
3995
3996                 if (l->is_mark()) {
3997                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
3998                 } else {
3999                         /* range: check that the other end of the range isn't
4000                            already there.
4001                         */
4002                         CopiedLocationInfo::iterator x;
4003                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4004                                 if (*(*x).location == *l) {
4005                                         break;
4006                                 }
4007                         }
4008                         if (x == _copied_locations.end()) {
4009                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4010                         } else {
4011                                 (*x).markers.push_back (*i);
4012                                 (*x).move_both = true;
4013                         }
4014                 }
4015
4016         }
4017 }
4018
4019 void
4020 MarkerDrag::setup_pointer_frame_offset ()
4021 {
4022         bool is_start;
4023         Location *location = _editor->find_location_from_marker (_marker, is_start);
4024         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4025 }
4026
4027 void
4028 MarkerDrag::motion (GdkEvent* event, bool)
4029 {
4030         framecnt_t f_delta = 0;
4031         bool is_start;
4032         bool move_both = false;
4033         Location *real_location;
4034         Location *copy_location = 0;
4035         framecnt_t const sd = snap_delta (event->button.state);
4036
4037         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4038         framepos_t next = newframe;
4039
4040         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4041                 move_both = true;
4042         }
4043
4044         CopiedLocationInfo::iterator x;
4045
4046         /* find the marker we're dragging, and compute the delta */
4047
4048         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4049
4050                 copy_location = (*x).location;
4051
4052                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4053
4054                         /* this marker is represented by this
4055                          * CopiedLocationMarkerInfo
4056                          */
4057
4058                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4059                                 /* que pasa ?? */
4060                                 return;
4061                         }
4062
4063                         if (real_location->is_mark()) {
4064                                 f_delta = newframe - copy_location->start();
4065                         } else {
4066
4067
4068                                 switch (_marker->type()) {
4069                                 case ArdourMarker::SessionStart:
4070                                 case ArdourMarker::RangeStart:
4071                                 case ArdourMarker::LoopStart:
4072                                 case ArdourMarker::PunchIn:
4073                                         f_delta = newframe - copy_location->start();
4074                                         break;
4075
4076                                 case ArdourMarker::SessionEnd:
4077                                 case ArdourMarker::RangeEnd:
4078                                 case ArdourMarker::LoopEnd:
4079                                 case ArdourMarker::PunchOut:
4080                                         f_delta = newframe - copy_location->end();
4081                                         break;
4082                                 default:
4083                                         /* what kind of marker is this ? */
4084                                         return;
4085                                 }
4086                         }
4087
4088                         break;
4089                 }
4090         }
4091
4092         if (x == _copied_locations.end()) {
4093                 /* hmm, impossible - we didn't find the dragged marker */
4094                 return;
4095         }
4096
4097         /* now move them all */
4098
4099         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4100
4101                 copy_location = x->location;
4102
4103                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4104                         continue;
4105                 }
4106
4107                 if (real_location->locked()) {
4108                         continue;
4109                 }
4110
4111                 if (copy_location->is_mark()) {
4112
4113                         /* now move it */
4114
4115                         copy_location->set_start (copy_location->start() + f_delta);
4116
4117                 } else {
4118
4119                         framepos_t new_start = copy_location->start() + f_delta;
4120                         framepos_t new_end = copy_location->end() + f_delta;
4121
4122                         if (is_start) { // start-of-range marker
4123
4124                                 if (move_both || (*x).move_both) {
4125                                         copy_location->set_start (new_start);
4126                                         copy_location->set_end (new_end);
4127                                 } else  if (new_start < copy_location->end()) {
4128                                         copy_location->set_start (new_start);
4129                                 } else if (newframe > 0) {
4130                                         //_editor->snap_to (next, RoundUpAlways, true);
4131                                         copy_location->set_end (next);
4132                                         copy_location->set_start (newframe);
4133                                 }
4134
4135                         } else { // end marker
4136
4137                                 if (move_both || (*x).move_both) {
4138                                         copy_location->set_end (new_end);
4139                                         copy_location->set_start (new_start);
4140                                 } else if (new_end > copy_location->start()) {
4141                                         copy_location->set_end (new_end);
4142                                 } else if (newframe > 0) {
4143                                         //_editor->snap_to (next, RoundDownAlways, true);
4144                                         copy_location->set_start (next);
4145                                         copy_location->set_end (newframe);
4146                                 }
4147                         }
4148                 }
4149
4150                 update_item (copy_location);
4151
4152                 /* now lookup the actual GUI items used to display this
4153                  * location and move them to wherever the copy of the location
4154                  * is now. This means that the logic in ARDOUR::Location is
4155                  * still enforced, even though we are not (yet) modifying
4156                  * the real Location itself.
4157                  */
4158
4159                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4160
4161                 if (lm) {
4162                         lm->set_position (copy_location->start(), copy_location->end());
4163                 }
4164
4165         }
4166
4167         assert (!_copied_locations.empty());
4168
4169         show_verbose_cursor_time (newframe);
4170 }
4171
4172 void
4173 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4174 {
4175         if (!movement_occurred) {
4176
4177                 if (was_double_click()) {
4178                         _editor->rename_marker (_marker);
4179                         return;
4180                 }
4181
4182                 /* just a click, do nothing but finish
4183                    off the selection process
4184                 */
4185
4186                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4187                 switch (op) {
4188                 case Selection::Set:
4189                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4190                                 _editor->selection->set (_marker);
4191                                 _selection_changed = true;
4192                         }
4193                         break;
4194
4195                 case Selection::Toggle:
4196                         /* we toggle on the button release, click only */
4197                         _editor->selection->toggle (_marker);
4198                         _selection_changed = true;
4199
4200                         break;
4201
4202                 case Selection::Extend:
4203                 case Selection::Add:
4204                         break;
4205                 }
4206
4207                 if (_selection_changed) {
4208                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4209                         _editor->commit_reversible_selection_op();
4210                 }
4211
4212                 return;
4213         }
4214
4215         _editor->_dragging_edit_point = false;
4216
4217         XMLNode &before = _editor->session()->locations()->get_state();
4218         bool in_command = false;
4219
4220         MarkerSelection::iterator i;
4221         CopiedLocationInfo::iterator x;
4222         bool is_start;
4223
4224         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4225              x != _copied_locations.end() && i != _editor->selection->markers.end();
4226              ++i, ++x) {
4227
4228                 Location * location = _editor->find_location_from_marker (*i, is_start);
4229
4230                 if (location) {
4231
4232                         if (location->locked()) {
4233                                 continue;
4234                         }
4235                         if (!in_command) {
4236                                 _editor->begin_reversible_command ( _("move marker") );
4237                                 in_command = true;
4238                         }
4239                         if (location->is_mark()) {
4240                                 location->set_start (((*x).location)->start());
4241                         } else {
4242                                 location->set (((*x).location)->start(), ((*x).location)->end());
4243                         }
4244                 }
4245         }
4246
4247         if (in_command) {
4248                 XMLNode &after = _editor->session()->locations()->get_state();
4249                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4250                 _editor->commit_reversible_command ();
4251         }
4252 }
4253
4254 void
4255 MarkerDrag::aborted (bool movement_occurred)
4256 {
4257         if (!movement_occurred) {
4258                 return;
4259         }
4260
4261         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4262
4263                 /* move all markers to their original location */
4264
4265
4266                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4267
4268                         bool is_start;
4269                         Location * location = _editor->find_location_from_marker (*m, is_start);
4270
4271                         if (location) {
4272                                 (*m)->set_position (is_start ? location->start() : location->end());
4273                         }
4274                 }
4275         }
4276 }
4277
4278 void
4279 MarkerDrag::update_item (Location*)
4280 {
4281         /* noop */
4282 }
4283
4284 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4285         : Drag (e, i)
4286         , _fixed_grab_x (0.0)
4287         , _fixed_grab_y (0.0)
4288         , _cumulative_x_drag (0.0)
4289         , _cumulative_y_drag (0.0)
4290         , _pushing (false)
4291         , _final_index (0)
4292 {
4293         if (_zero_gain_fraction < 0.0) {
4294                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4295         }
4296
4297         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4298
4299         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4300         assert (_point);
4301 }
4302
4303
4304 void
4305 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4306 {
4307         Drag::start_grab (event, _editor->cursors()->fader);
4308
4309         // start the grab at the center of the control point so
4310         // the point doesn't 'jump' to the mouse after the first drag
4311         _fixed_grab_x = _point->get_x();
4312         _fixed_grab_y = _point->get_y();
4313
4314         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4315         setup_snap_delta (pos);
4316
4317         float const fraction = 1 - (_point->get_y() / _point->line().height());
4318         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4319
4320         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4321
4322         if (!_point->can_slide ()) {
4323                 _x_constrained = true;
4324         }
4325 }
4326
4327 void
4328 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4329 {
4330         double dx = _drags->current_pointer_x() - last_pointer_x();
4331         double dy = current_pointer_y() - last_pointer_y();
4332         bool need_snap = true;
4333
4334         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4335                 dx *= 0.1;
4336                 dy *= 0.1;
4337                 need_snap = false;
4338         }
4339
4340         /* coordinate in pixels relative to the start of the region (for region-based automation)
4341            or track (for track-based automation) */
4342         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4343         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4344
4345         // calculate zero crossing point. back off by .01 to stay on the
4346         // positive side of zero
4347         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4348
4349         if (_x_constrained) {
4350                 cx = _fixed_grab_x;
4351         }
4352         if (_y_constrained) {
4353                 cy = _fixed_grab_y;
4354         }
4355
4356         _cumulative_x_drag = cx - _fixed_grab_x;
4357         _cumulative_y_drag = cy - _fixed_grab_y;
4358
4359         cx = max (0.0, cx);
4360         cy = max (0.0, cy);
4361         cy = min ((double) _point->line().height(), cy);
4362
4363         // make sure we hit zero when passing through
4364         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4365                 cy = zero_gain_y;
4366         }
4367
4368         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4369
4370         if (!_x_constrained && need_snap) {
4371                 _editor->snap_to_with_modifier (cx_frames, event);
4372         }
4373
4374         cx_frames -= snap_delta (event->button.state);
4375         cx_frames = min (cx_frames, _point->line().maximum_time());
4376
4377         float const fraction = 1.0 - (cy / _point->line().height());
4378
4379         if (first_motion) {
4380                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4381                 _editor->begin_reversible_command (_("automation event move"));
4382                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4383         }
4384         pair<double, float> result;
4385         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4386
4387         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4388 }
4389
4390 void
4391 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4392 {
4393         if (!movement_occurred) {
4394
4395                 /* just a click */
4396                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4397                         _editor->reset_point_selection ();
4398                 }
4399
4400         } else {
4401                 _point->line().end_drag (_pushing, _final_index);
4402                 _editor->commit_reversible_command ();
4403         }
4404 }
4405
4406 void
4407 ControlPointDrag::aborted (bool)
4408 {
4409         _point->line().reset ();
4410 }
4411
4412 bool
4413 ControlPointDrag::active (Editing::MouseMode m)
4414 {
4415         if (m == Editing::MouseDraw) {
4416                 /* always active in mouse draw */
4417                 return true;
4418         }
4419
4420         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4421         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4422 }
4423
4424 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4425         : Drag (e, i)
4426         , _line (0)
4427         , _fixed_grab_x (0.0)
4428         , _fixed_grab_y (0.0)
4429         , _cumulative_y_drag (0)
4430         , _before (0)
4431         , _after (0)
4432 {
4433         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4434 }
4435
4436 void
4437 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4438 {
4439         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4440         assert (_line);
4441
4442         _item = &_line->grab_item ();
4443
4444         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4445            origin, and ditto for y.
4446         */
4447
4448         double mx = event->button.x;
4449         double my = event->button.y;
4450
4451         _line->grab_item().canvas_to_item (mx, my);
4452
4453         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4454
4455         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4456                 /* no adjacent points */
4457                 return;
4458         }
4459
4460         Drag::start_grab (event, _editor->cursors()->fader);
4461
4462         /* store grab start in item frame */
4463         double const bx = _line->nth (_before)->get_x();
4464         double const ax = _line->nth (_after)->get_x();
4465         double const click_ratio = (ax - mx) / (ax - bx);
4466
4467         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4468
4469         _fixed_grab_x = mx;
4470         _fixed_grab_y = cy;
4471
4472         double fraction = 1.0 - (cy / _line->height());
4473
4474         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4475 }
4476
4477 void
4478 LineDrag::motion (GdkEvent* event, bool first_move)
4479 {
4480         double dy = current_pointer_y() - last_pointer_y();
4481
4482         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4483                 dy *= 0.1;
4484         }
4485
4486         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4487
4488         _cumulative_y_drag = cy - _fixed_grab_y;
4489
4490         cy = max (0.0, cy);
4491         cy = min ((double) _line->height(), cy);
4492
4493         double const fraction = 1.0 - (cy / _line->height());
4494         uint32_t ignored;
4495
4496         if (first_move) {
4497                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4498
4499                 _editor->begin_reversible_command (_("automation range move"));
4500                 _line->start_drag_line (_before, _after, initial_fraction);
4501         }
4502
4503         /* we are ignoring x position for this drag, so we can just pass in anything */
4504         pair<double, float> result;
4505
4506         result = _line->drag_motion (0, fraction, true, false, ignored);
4507         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4508 }
4509
4510 void
4511 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4512 {
4513         if (movement_occurred) {
4514                 motion (event, false);
4515                 _line->end_drag (false, 0);
4516                 _editor->commit_reversible_command ();
4517         } else {
4518                 /* add a new control point on the line */
4519
4520                 AutomationTimeAxisView* atv;
4521
4522                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4523                         framepos_t where = grab_frame ();
4524
4525                         double cx = 0;
4526                         double cy = _fixed_grab_y;
4527
4528                         _line->grab_item().item_to_canvas (cx, cy);
4529
4530                         atv->add_automation_event (event, where, cy, false);
4531                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4532                         AudioRegionView* arv;
4533
4534                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4535                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4536                         }
4537                 }
4538         }
4539 }
4540
4541 void
4542 LineDrag::aborted (bool)
4543 {
4544         _line->reset ();
4545 }
4546
4547 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4548         : Drag (e, i),
4549           _line (0),
4550           _arv (0),
4551           _region_view_grab_x (0.0),
4552           _cumulative_x_drag (0),
4553           _before (0.0),
4554           _max_x (0)
4555 {
4556         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4557 }
4558
4559 void
4560 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4561 {
4562         Drag::start_grab (event);
4563
4564         _line = reinterpret_cast<Line*> (_item);
4565         assert (_line);
4566
4567         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4568
4569         double cx = event->button.x;
4570         double cy = event->button.y;
4571
4572         _item->parent()->canvas_to_item (cx, cy);
4573
4574         /* store grab start in parent frame */
4575         _region_view_grab_x = cx;
4576
4577         _before = *(float*) _item->get_data ("position");
4578
4579         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4580
4581         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4582 }
4583
4584 void
4585 FeatureLineDrag::motion (GdkEvent*, bool)
4586 {
4587         double dx = _drags->current_pointer_x() - last_pointer_x();
4588
4589         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4590
4591         _cumulative_x_drag += dx;
4592
4593         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4594
4595         if (cx > _max_x){
4596                 cx = _max_x;
4597         }
4598         else if(cx < 0){
4599                 cx = 0;
4600         }
4601
4602         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4603         assert (bbox);
4604         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4605
4606         float *pos = new float;
4607         *pos = cx;
4608
4609         _line->set_data ("position", pos);
4610
4611         _before = cx;
4612 }
4613
4614 void
4615 FeatureLineDrag::finished (GdkEvent*, bool)
4616 {
4617         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4618         _arv->update_transient(_before, _before);
4619 }
4620
4621 void
4622 FeatureLineDrag::aborted (bool)
4623 {
4624         //_line->reset ();
4625 }
4626
4627 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4628         : Drag (e, i)
4629         , _vertical_only (false)
4630 {
4631         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4632 }
4633
4634 void
4635 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4636 {
4637         Drag::start_grab (event);
4638         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4639 }
4640
4641 void
4642 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4643 {
4644         framepos_t start;
4645         framepos_t end;
4646         double y1;
4647         double y2;
4648
4649         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4650
4651         framepos_t grab = grab_frame ();
4652         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4653                 _editor->snap_to_with_modifier (grab, event);
4654         } else {
4655                 grab = raw_grab_frame ();
4656         }
4657
4658         /* base start and end on initial click position */
4659
4660         if (pf < grab) {
4661                 start = pf;
4662                 end = grab;
4663         } else {
4664                 end = pf;
4665                 start = grab;
4666         }
4667
4668         if (current_pointer_y() < grab_y()) {
4669                 y1 = current_pointer_y();
4670                 y2 = grab_y();
4671         } else {
4672                 y2 = current_pointer_y();
4673                 y1 = grab_y();
4674         }
4675
4676         if (start != end || y1 != y2) {
4677
4678                 double x1 = _editor->sample_to_pixel (start);
4679                 double x2 = _editor->sample_to_pixel (end);
4680                 const double min_dimension = 2.0;
4681
4682                 if (_vertical_only) {
4683                         /* fixed 10 pixel width */
4684                         x2 = x1 + 10;
4685                 } else {
4686                         if (x2 < x1) {
4687                                 x2 = min (x1 - min_dimension, x2);
4688                         } else {
4689                                 x2 = max (x1 + min_dimension, x2);
4690                         }
4691                 }
4692
4693                 if (y2 < y1) {
4694                         y2 = min (y1 - min_dimension, y2);
4695                 } else {
4696                         y2 = max (y1 + min_dimension, y2);
4697                 }
4698
4699                 /* translate rect into item space and set */
4700
4701                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4702
4703                 /* this drag is a _trackview_only == true drag, so the y1 and
4704                  * y2 (computed using current_pointer_y() and grab_y()) will be
4705                  * relative to the top of the trackview group). The
4706                  * rubberband rect has the same parent/scroll offset as the
4707                  * the trackview group, so we can use the "r" rect directly
4708                  * to set the shape of the rubberband.
4709                  */
4710
4711                 _editor->rubberband_rect->set (r);
4712                 _editor->rubberband_rect->show();
4713                 _editor->rubberband_rect->raise_to_top();
4714
4715                 show_verbose_cursor_time (pf);
4716
4717                 do_select_things (event, true);
4718         }
4719 }
4720
4721 void
4722 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4723 {
4724         framepos_t x1;
4725         framepos_t x2;
4726         framepos_t grab = grab_frame ();
4727         framepos_t lpf = last_pointer_frame ();
4728
4729         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4730                 grab = raw_grab_frame ();
4731                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4732         }
4733
4734         if (grab < lpf) {
4735                 x1 = grab;
4736                 x2 = lpf;
4737         } else {
4738                 x2 = grab;
4739                 x1 = lpf;
4740         }
4741
4742         double y1;
4743         double y2;
4744
4745         if (current_pointer_y() < grab_y()) {
4746                 y1 = current_pointer_y();
4747                 y2 = grab_y();
4748         } else {
4749                 y2 = current_pointer_y();
4750                 y1 = grab_y();
4751         }
4752
4753         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4754 }
4755
4756 void
4757 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4758 {
4759         if (movement_occurred) {
4760
4761                 motion (event, false);
4762                 do_select_things (event, false);
4763
4764         } else {
4765
4766                 /* just a click */
4767
4768                 bool do_deselect = true;
4769                 MidiTimeAxisView* mtv;
4770
4771                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4772                         /* MIDI track */
4773                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4774                                 /* nothing selected */
4775                                 add_midi_region (mtv, true);
4776                                 do_deselect = false;
4777                         }
4778                 }
4779
4780                 /* do not deselect if Primary or Tertiary (toggle-select or
4781                  * extend-select are pressed.
4782                  */
4783
4784                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4785                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4786                     do_deselect) {
4787                         deselect_things ();
4788                 }
4789
4790         }
4791
4792         _editor->rubberband_rect->hide();
4793 }
4794
4795 void
4796 RubberbandSelectDrag::aborted (bool)
4797 {
4798         _editor->rubberband_rect->hide ();
4799 }
4800
4801 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4802         : RegionDrag (e, i, p, v)
4803 {
4804         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4805 }
4806
4807 void
4808 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4809 {
4810         Drag::start_grab (event, cursor);
4811
4812         _editor->get_selection().add (_primary);
4813
4814         framepos_t where = _primary->region()->position();
4815         setup_snap_delta (where);
4816
4817         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4818 }
4819
4820 void
4821 TimeFXDrag::motion (GdkEvent* event, bool)
4822 {
4823         RegionView* rv = _primary;
4824         StreamView* cv = rv->get_time_axis_view().view ();
4825
4826         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4827         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4828         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4829         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4830         _editor->snap_to_with_modifier (pf, event);
4831         pf -= snap_delta (event->button.state);
4832
4833         if (pf > rv->region()->position()) {
4834                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4835         }
4836
4837         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4838 }
4839
4840 void
4841 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4842 {
4843         /* this may have been a single click, no drag. We still want the dialog
4844            to show up in that case, so that the user can manually edit the
4845            parameters for the timestretch.
4846         */
4847
4848         float fraction = 1.0;
4849
4850         if (movement_occurred) {
4851
4852                 motion (event, false);
4853
4854                 _primary->get_time_axis_view().hide_timestretch ();
4855
4856                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4857
4858                 if (adjusted_frame_pos < _primary->region()->position()) {
4859                         /* backwards drag of the left edge - not usable */
4860                         return;
4861                 }
4862
4863                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4864
4865                 fraction = (double) newlen / (double) _primary->region()->length();
4866
4867 #ifndef USE_RUBBERBAND
4868                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4869                 if (_primary->region()->data_type() == DataType::AUDIO) {
4870                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4871                 }
4872 #endif
4873         }
4874
4875         if (!_editor->get_selection().regions.empty()) {
4876                 /* primary will already be included in the selection, and edit
4877                    group shared editing will propagate selection across
4878                    equivalent regions, so just use the current region
4879                    selection.
4880                 */
4881
4882                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4883                         error << _("An error occurred while executing time stretch operation") << endmsg;
4884                 }
4885         }
4886 }
4887
4888 void
4889 TimeFXDrag::aborted (bool)
4890 {
4891         _primary->get_time_axis_view().hide_timestretch ();
4892 }
4893
4894 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4895         : Drag (e, i)
4896 {
4897         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4898 }
4899
4900 void
4901 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4902 {
4903         Drag::start_grab (event);
4904 }
4905
4906 void
4907 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4908 {
4909         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4910 }
4911
4912 void
4913 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4914 {
4915         if (movement_occurred && _editor->session()) {
4916                 /* make sure we stop */
4917                 _editor->session()->request_transport_speed (0.0);
4918         }
4919 }
4920
4921 void
4922 ScrubDrag::aborted (bool)
4923 {
4924         /* XXX: TODO */
4925 }
4926
4927 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4928         : Drag (e, i)
4929         , _operation (o)
4930         , _add (false)
4931         , _time_selection_at_start (!_editor->get_selection().time.empty())
4932 {
4933         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4934
4935         if (_time_selection_at_start) {
4936                 start_at_start = _editor->get_selection().time.start();
4937                 end_at_start = _editor->get_selection().time.end_frame();
4938         }
4939 }
4940
4941 void
4942 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4943 {
4944         if (_editor->session() == 0) {
4945                 return;
4946         }
4947
4948         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4949
4950         switch (_operation) {
4951         case CreateSelection:
4952                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4953                         _add = true;
4954                 } else {
4955                         _add = false;
4956                 }
4957                 cursor = _editor->cursors()->selector;
4958                 Drag::start_grab (event, cursor);
4959                 break;
4960
4961         case SelectionStartTrim:
4962                 if (_editor->clicked_axisview) {
4963                         _editor->clicked_axisview->order_selection_trims (_item, true);
4964                 }
4965                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
4966                 break;
4967
4968         case SelectionEndTrim:
4969                 if (_editor->clicked_axisview) {
4970                         _editor->clicked_axisview->order_selection_trims (_item, false);
4971                 }
4972                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
4973                 break;
4974
4975         case SelectionMove:
4976                 Drag::start_grab (event, cursor);
4977                 break;
4978
4979         case SelectionExtend:
4980                 Drag::start_grab (event, cursor);
4981                 break;
4982         }
4983
4984         if (_operation == SelectionMove) {
4985                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
4986         } else {
4987                 show_verbose_cursor_time (adjusted_current_frame (event));
4988         }
4989 }
4990
4991 void
4992 SelectionDrag::setup_pointer_frame_offset ()
4993 {
4994         switch (_operation) {
4995         case CreateSelection:
4996                 _pointer_frame_offset = 0;
4997                 break;
4998
4999         case SelectionStartTrim:
5000         case SelectionMove:
5001                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5002                 break;
5003
5004         case SelectionEndTrim:
5005                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5006                 break;
5007
5008         case SelectionExtend:
5009                 break;
5010         }
5011 }
5012
5013 void
5014 SelectionDrag::motion (GdkEvent* event, bool first_move)
5015 {
5016         framepos_t start = 0;
5017         framepos_t end = 0;
5018         framecnt_t length = 0;
5019         framecnt_t distance = 0;
5020
5021         framepos_t const pending_position = adjusted_current_frame (event);
5022
5023         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5024                 return;
5025         }
5026
5027         switch (_operation) {
5028         case CreateSelection:
5029         {
5030                 framepos_t grab = grab_frame ();
5031
5032                 if (first_move) {
5033                         grab = adjusted_current_frame (event, false);
5034                         if (grab < pending_position) {
5035                                 _editor->snap_to (grab, RoundDownMaybe);
5036                         }  else {
5037                                 _editor->snap_to (grab, RoundUpMaybe);
5038                         }
5039                 }
5040
5041                 if (pending_position < grab) {
5042                         start = pending_position;
5043                         end = grab;
5044                 } else {
5045                         end = pending_position;
5046                         start = grab;
5047                 }
5048
5049                 /* first drag: Either add to the selection
5050                    or create a new selection
5051                 */
5052
5053                 if (first_move) {
5054
5055                         if (_add) {
5056
5057                                 /* adding to the selection */
5058                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5059                                 _editor->clicked_selection = _editor->selection->add (start, end);
5060                                 _add = false;
5061
5062                         } else {
5063
5064                                 /* new selection */
5065
5066                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5067                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5068                                 }
5069
5070                                 _editor->clicked_selection = _editor->selection->set (start, end);
5071                         }
5072                 }
5073
5074                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5075                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5076                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5077                 if (atest) {
5078                         _editor->selection->add (atest);
5079                         break;
5080                 }
5081
5082                 /* select all tracks within the rectangle that we've marked out so far */
5083                 TrackViewList new_selection;
5084                 TrackViewList& all_tracks (_editor->track_views);
5085
5086                 ArdourCanvas::Coord const top = grab_y();
5087                 ArdourCanvas::Coord const bottom = current_pointer_y();
5088
5089                 if (top >= 0 && bottom >= 0) {
5090
5091                         //first, find the tracks that are covered in the y range selection
5092                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5093                                 if ((*i)->covered_by_y_range (top, bottom)) {
5094                                         new_selection.push_back (*i);
5095                                 }
5096                         }
5097
5098                         //now find any tracks that are GROUPED with the tracks we selected
5099                         TrackViewList grouped_add = new_selection;
5100                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5101                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5102                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5103                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5104                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5105                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5106                                                         grouped_add.push_back (*j);
5107                                         }
5108                                 }
5109                         }
5110
5111                         //now compare our list with the current selection, and add or remove as necessary
5112                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5113                         TrackViewList tracks_to_add;
5114                         TrackViewList tracks_to_remove;
5115                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5116                                 if ( !_editor->selection->tracks.contains ( *i ) )
5117                                         tracks_to_add.push_back ( *i );
5118                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5119                                 if ( !grouped_add.contains ( *i ) )
5120                                         tracks_to_remove.push_back ( *i );
5121                         _editor->selection->add(tracks_to_add);
5122                         _editor->selection->remove(tracks_to_remove);
5123
5124                 }
5125         }
5126         break;
5127
5128         case SelectionStartTrim:
5129
5130                 end = _editor->selection->time[_editor->clicked_selection].end;
5131
5132                 if (pending_position > end) {
5133                         start = end;
5134                 } else {
5135                         start = pending_position;
5136                 }
5137                 break;
5138
5139         case SelectionEndTrim:
5140
5141                 start = _editor->selection->time[_editor->clicked_selection].start;
5142
5143                 if (pending_position < start) {
5144                         end = start;
5145                 } else {
5146                         end = pending_position;
5147                 }
5148
5149                 break;
5150
5151         case SelectionMove:
5152
5153                 start = _editor->selection->time[_editor->clicked_selection].start;
5154                 end = _editor->selection->time[_editor->clicked_selection].end;
5155
5156                 length = end - start;
5157                 distance = pending_position - start;
5158                 start = pending_position;
5159                 _editor->snap_to (start);
5160
5161                 end = start + length;
5162
5163                 break;
5164
5165         case SelectionExtend:
5166                 break;
5167         }
5168
5169         if (start != end) {
5170                 switch (_operation) {
5171                 case SelectionMove:
5172                         if (_time_selection_at_start) {
5173                                 _editor->selection->move_time (distance);
5174                         }
5175                         break;
5176                 default:
5177                         _editor->selection->replace (_editor->clicked_selection, start, end);
5178                 }
5179         }
5180
5181         if (_operation == SelectionMove) {
5182                 show_verbose_cursor_time(start);
5183         } else {
5184                 show_verbose_cursor_time(pending_position);
5185         }
5186 }
5187
5188 void
5189 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5190 {
5191         Session* s = _editor->session();
5192
5193         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5194         if (movement_occurred) {
5195                 motion (event, false);
5196                 /* XXX this is not object-oriented programming at all. ick */
5197                 if (_editor->selection->time.consolidate()) {
5198                         _editor->selection->TimeChanged ();
5199                 }
5200
5201                 /* XXX what if its a music time selection? */
5202                 if (s) {
5203                         if (s->get_play_range() && s->transport_rolling()) {
5204                                 s->request_play_range (&_editor->selection->time, true);
5205                         } else if (!s->config.get_external_sync()) {
5206                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5207                                         if (_operation == SelectionEndTrim)
5208                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5209                                         else
5210                                                 s->request_locate (_editor->get_selection().time.start());
5211                                 }
5212                         }
5213
5214                         if (_editor->get_selection().time.length() != 0) {
5215                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5216                         } else {
5217                                 s->clear_range_selection ();
5218                         }
5219                 }
5220
5221         } else {
5222                 /* just a click, no pointer movement.
5223                  */
5224
5225                 if (_operation == SelectionExtend) {
5226                         if (_time_selection_at_start) {
5227                                 framepos_t pos = adjusted_current_frame (event, false);
5228                                 framepos_t start = min (pos, start_at_start);
5229                                 framepos_t end = max (pos, end_at_start);
5230                                 _editor->selection->set (start, end);
5231                         }
5232                 } else {
5233                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5234                                 if (_editor->clicked_selection) {
5235                                         _editor->selection->remove (_editor->clicked_selection);
5236                                 }
5237                         } else {
5238                                 if (!_editor->clicked_selection) {
5239                                         _editor->selection->clear_time();
5240                                 }
5241                         }
5242                 }
5243
5244                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5245                         _editor->selection->set (_editor->clicked_axisview);
5246                 }
5247
5248                 if (s && s->get_play_range () && s->transport_rolling()) {
5249                         s->request_stop (false, false);
5250                 }
5251
5252         }
5253
5254         _editor->stop_canvas_autoscroll ();
5255         _editor->clicked_selection = 0;
5256         _editor->commit_reversible_selection_op ();
5257 }
5258
5259 void
5260 SelectionDrag::aborted (bool)
5261 {
5262         /* XXX: TODO */
5263 }
5264
5265 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5266         : Drag (e, i, false),
5267           _operation (o),
5268           _copy (false)
5269 {
5270         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5271
5272         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5273                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5274                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5275         _drag_rect->hide ();
5276
5277         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5278         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5279 }
5280
5281 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5282 {
5283         /* normal canvas items will be cleaned up when their parent group is deleted. But
5284            this item is created as the child of a long-lived parent group, and so we
5285            need to explicitly delete it.
5286         */
5287         delete _drag_rect;
5288 }
5289
5290 void
5291 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5292 {
5293         if (_editor->session() == 0) {
5294                 return;
5295         }
5296
5297         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5298
5299         if (!_editor->temp_location) {
5300                 _editor->temp_location = new Location (*_editor->session());
5301         }
5302
5303         switch (_operation) {
5304         case CreateSkipMarker:
5305         case CreateRangeMarker:
5306         case CreateTransportMarker:
5307         case CreateCDMarker:
5308
5309                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5310                         _copy = true;
5311                 } else {
5312                         _copy = false;
5313                 }
5314                 cursor = _editor->cursors()->selector;
5315                 break;
5316         }
5317
5318         Drag::start_grab (event, cursor);
5319
5320         show_verbose_cursor_time (adjusted_current_frame (event));
5321 }
5322
5323 void
5324 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5325 {
5326         framepos_t start = 0;
5327         framepos_t end = 0;
5328         ArdourCanvas::Rectangle *crect;
5329
5330         switch (_operation) {
5331         case CreateSkipMarker:
5332                 crect = _editor->range_bar_drag_rect;
5333                 break;
5334         case CreateRangeMarker:
5335                 crect = _editor->range_bar_drag_rect;
5336                 break;
5337         case CreateTransportMarker:
5338                 crect = _editor->transport_bar_drag_rect;
5339                 break;
5340         case CreateCDMarker:
5341                 crect = _editor->cd_marker_bar_drag_rect;
5342                 break;
5343         default:
5344                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5345                 return;
5346                 break;
5347         }
5348
5349         framepos_t const pf = adjusted_current_frame (event);
5350
5351         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5352                 framepos_t grab = grab_frame ();
5353                 _editor->snap_to (grab);
5354
5355                 if (pf < grab_frame()) {
5356                         start = pf;
5357                         end = grab;
5358                 } else {
5359                         end = pf;
5360                         start = grab;
5361                 }
5362
5363                 /* first drag: Either add to the selection
5364                    or create a new selection.
5365                 */
5366
5367                 if (first_move) {
5368
5369                         _editor->temp_location->set (start, end);
5370
5371                         crect->show ();
5372
5373                         update_item (_editor->temp_location);
5374                         _drag_rect->show();
5375                         //_drag_rect->raise_to_top();
5376
5377                 }
5378         }
5379
5380         if (start != end) {
5381                 _editor->temp_location->set (start, end);
5382
5383                 double x1 = _editor->sample_to_pixel (start);
5384                 double x2 = _editor->sample_to_pixel (end);
5385                 crect->set_x0 (x1);
5386                 crect->set_x1 (x2);
5387
5388                 update_item (_editor->temp_location);
5389         }
5390
5391         show_verbose_cursor_time (pf);
5392
5393 }
5394
5395 void
5396 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5397 {
5398         Location * newloc = 0;
5399         string rangename;
5400         int flags;
5401
5402         if (movement_occurred) {
5403                 motion (event, false);
5404                 _drag_rect->hide();
5405
5406                 switch (_operation) {
5407                 case CreateSkipMarker:
5408                 case CreateRangeMarker:
5409                 case CreateCDMarker:
5410                     {
5411                         XMLNode &before = _editor->session()->locations()->get_state();
5412                         if (_operation == CreateSkipMarker) {
5413                                 _editor->begin_reversible_command (_("new skip marker"));
5414                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5415                                 flags = Location::IsRangeMarker | Location::IsSkip;
5416                                 _editor->range_bar_drag_rect->hide();
5417                         } else if (_operation == CreateCDMarker) {
5418                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5419                                 _editor->begin_reversible_command (_("new CD marker"));
5420                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5421                                 _editor->cd_marker_bar_drag_rect->hide();
5422                         } else {
5423                                 _editor->begin_reversible_command (_("new skip marker"));
5424                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5425                                 flags = Location::IsRangeMarker;
5426                                 _editor->range_bar_drag_rect->hide();
5427                         }
5428                         newloc = new Location (
5429                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5430                                 );
5431
5432                         _editor->session()->locations()->add (newloc, true);
5433                         XMLNode &after = _editor->session()->locations()->get_state();
5434                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5435                         _editor->commit_reversible_command ();
5436                         break;
5437                     }
5438
5439                 case CreateTransportMarker:
5440                         // popup menu to pick loop or punch
5441                         _editor->new_transport_marker_context_menu (&event->button, _item);
5442                         break;
5443                 }
5444
5445         } else {
5446
5447                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5448
5449                 if (_operation == CreateTransportMarker) {
5450
5451                         /* didn't drag, so just locate */
5452
5453                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5454
5455                 } else if (_operation == CreateCDMarker) {
5456
5457                         /* didn't drag, but mark is already created so do
5458                          * nothing */
5459
5460                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5461
5462                         framepos_t start;
5463                         framepos_t end;
5464
5465                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5466
5467                         if (end == max_framepos) {
5468                                 end = _editor->session()->current_end_frame ();
5469                         }
5470
5471                         if (start == max_framepos) {
5472                                 start = _editor->session()->current_start_frame ();
5473                         }
5474
5475                         switch (_editor->mouse_mode) {
5476                         case MouseObject:
5477                                 /* find the two markers on either side and then make the selection from it */
5478                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5479                                 break;
5480
5481                         case MouseRange:
5482                                 /* find the two markers on either side of the click and make the range out of it */
5483                                 _editor->selection->set (start, end);
5484                                 break;
5485
5486                         default:
5487                                 break;
5488                         }
5489                 }
5490         }
5491
5492         _editor->stop_canvas_autoscroll ();
5493 }
5494
5495 void
5496 RangeMarkerBarDrag::aborted (bool movement_occurred)
5497 {
5498         if (movement_occurred) {
5499                 _drag_rect->hide ();
5500         }
5501 }
5502
5503 void
5504 RangeMarkerBarDrag::update_item (Location* location)
5505 {
5506         double const x1 = _editor->sample_to_pixel (location->start());
5507         double const x2 = _editor->sample_to_pixel (location->end());
5508
5509         _drag_rect->set_x0 (x1);
5510         _drag_rect->set_x1 (x2);
5511 }
5512
5513 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5514         : Drag (e, i)
5515         , _cumulative_dx (0)
5516         , _cumulative_dy (0)
5517         , _was_selected (false)
5518 {
5519         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5520
5521         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5522         assert (_primary);
5523         _region = &_primary->region_view ();
5524         _note_height = _region->midi_stream_view()->note_height ();
5525 }
5526
5527 void
5528 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5529 {
5530         Drag::start_grab (event);
5531         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5532
5533         if (!(_was_selected = _primary->selected())) {
5534
5535                 /* tertiary-click means extend selection - we'll do that on button release,
5536                    so don't add it here, because otherwise we make it hard to figure
5537                    out the "extend-to" range.
5538                 */
5539
5540                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5541
5542                 if (!extend) {
5543                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5544
5545                         if (add) {
5546                                 _region->note_selected (_primary, true);
5547                         } else {
5548                                 _editor->get_selection().clear_points();
5549                                 _region->unique_select (_primary);
5550                         }
5551                 }
5552         }
5553 }
5554
5555 /** @return Current total drag x change in frames */
5556 frameoffset_t
5557 NoteDrag::total_dx (const guint state) const
5558 {
5559         /* dx in frames */
5560         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5561
5562         /* primary note time */
5563         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5564
5565         /* new time of the primary note in session frames */
5566         frameoffset_t st = n + dx + snap_delta (state);
5567
5568         framepos_t const rp = _region->region()->position ();
5569
5570         /* prevent the note being dragged earlier than the region's position */
5571         st = max (st, rp);
5572
5573         /* possibly snap and return corresponding delta */
5574
5575         bool snap = true;
5576
5577         if (ArdourKeyboard::indicates_snap (state)) {
5578                 if (_editor->snap_mode () != SnapOff) {
5579                         snap = false;
5580                 }
5581         } else {
5582                 if (_editor->snap_mode () == SnapOff) {
5583                         snap = false;
5584                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5585                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5586                                 snap = true;
5587                         }
5588                 }
5589         }
5590
5591         frameoffset_t ret;
5592         if (snap) {
5593                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5594                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5595         } else {
5596                 ret = st - n - snap_delta (state);
5597         }
5598         return ret;
5599 }
5600
5601 /** @return Current total drag y change in note number */
5602 int8_t
5603 NoteDrag::total_dy () const
5604 {
5605         MidiStreamView* msv = _region->midi_stream_view ();
5606         double const y = _region->midi_view()->y_position ();
5607         /* new current note */
5608         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5609         /* clamp */
5610         n = max (msv->lowest_note(), n);
5611         n = min (msv->highest_note(), n);
5612         /* and work out delta */
5613         return n - msv->y_to_note (grab_y() - y);
5614 }
5615
5616 void
5617 NoteDrag::motion (GdkEvent * event, bool)
5618 {
5619         /* Total change in x and y since the start of the drag */
5620         frameoffset_t const dx = total_dx (event->button.state);
5621         int8_t const dy = total_dy ();
5622
5623         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5624         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5625         double const tdy = -dy * _note_height - _cumulative_dy;
5626
5627         if (tdx || tdy) {
5628                 _cumulative_dx += tdx;
5629                 _cumulative_dy += tdy;
5630
5631                 int8_t note_delta = total_dy();
5632
5633                 _region->move_selection (tdx, tdy, note_delta);
5634
5635                 /* the new note value may be the same as the old one, but we
5636                  * don't know what that means because the selection may have
5637                  * involved more than one note and we might be doing something
5638                  * odd with them. so show the note value anyway, always.
5639                  */
5640
5641                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5642
5643                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5644         }
5645 }
5646
5647 void
5648 NoteDrag::finished (GdkEvent* ev, bool moved)
5649 {
5650         if (!moved) {
5651                 /* no motion - select note */
5652
5653                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5654                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5655
5656                         bool changed = false;
5657
5658                         if (_was_selected) {
5659                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5660                                 if (add) {
5661                                         _region->note_deselected (_primary);
5662                                         changed = true;
5663                                 } else {
5664                                         _editor->get_selection().clear_points();
5665                                         _region->unique_select (_primary);
5666                                         changed = true;
5667                                 }
5668                         } else {
5669                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5670                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5671
5672                                 if (!extend && !add && _region->selection_size() > 1) {
5673                                         _editor->get_selection().clear_points();
5674                                         _region->unique_select (_primary);
5675                                         changed = true;
5676                                 } else if (extend) {
5677                                         _region->note_selected (_primary, true, true);
5678                                         changed = true;
5679                                 } else {
5680                                         /* it was added during button press */
5681                                         changed = true;
5682
5683                                 }
5684                         }
5685
5686                         if (changed) {
5687                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5688                                 _editor->commit_reversible_selection_op();
5689                         }
5690                 }
5691         } else {
5692                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5693         }
5694 }
5695
5696 void
5697 NoteDrag::aborted (bool)
5698 {
5699         /* XXX: TODO */
5700 }
5701
5702 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5703 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5704         : Drag (editor, atv->base_item ())
5705         , _ranges (r)
5706         , _y_origin (atv->y_position())
5707         , _nothing_to_drag (false)
5708 {
5709         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5710         setup (atv->lines ());
5711 }
5712
5713 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5714 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5715         : Drag (editor, rv->get_canvas_group ())
5716         , _ranges (r)
5717         , _y_origin (rv->get_time_axis_view().y_position())
5718         , _nothing_to_drag (false)
5719         , _integral (false)
5720 {
5721         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5722
5723         list<boost::shared_ptr<AutomationLine> > lines;
5724
5725         AudioRegionView*      audio_view;
5726         AutomationRegionView* automation_view;
5727         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5728                 lines.push_back (audio_view->get_gain_line ());
5729         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5730                 lines.push_back (automation_view->line ());
5731                 _integral = true;
5732         } else {
5733                 error << _("Automation range drag created for invalid region type") << endmsg;
5734         }
5735
5736         setup (lines);
5737 }
5738
5739 /** @param lines AutomationLines to drag.
5740  *  @param offset Offset from the session start to the points in the AutomationLines.
5741  */
5742 void
5743 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5744 {
5745         /* find the lines that overlap the ranges being dragged */
5746         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5747         while (i != lines.end ()) {
5748                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5749                 ++j;
5750
5751                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5752
5753                 /* check this range against all the AudioRanges that we are using */
5754                 list<AudioRange>::const_iterator k = _ranges.begin ();
5755                 while (k != _ranges.end()) {
5756                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5757                                 break;
5758                         }
5759                         ++k;
5760                 }
5761
5762                 /* add it to our list if it overlaps at all */
5763                 if (k != _ranges.end()) {
5764                         Line n;
5765                         n.line = *i;
5766                         n.state = 0;
5767                         n.range = r;
5768                         _lines.push_back (n);
5769                 }
5770
5771                 i = j;
5772         }
5773
5774         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5775 }
5776
5777 double
5778 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5779 {
5780         return 1.0 - ((global_y - _y_origin) / line->height());
5781 }
5782
5783 double
5784 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5785 {
5786         const double v = list->eval(x);
5787         return _integral ? rint(v) : v;
5788 }
5789
5790 void
5791 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5792 {
5793         Drag::start_grab (event, cursor);
5794
5795         /* Get line states before we start changing things */
5796         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5797                 i->state = &i->line->get_state ();
5798                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5799         }
5800
5801         if (_ranges.empty()) {
5802
5803                 /* No selected time ranges: drag all points */
5804                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5805                         uint32_t const N = i->line->npoints ();
5806                         for (uint32_t j = 0; j < N; ++j) {
5807                                 i->points.push_back (i->line->nth (j));
5808                         }
5809                 }
5810
5811         }
5812
5813         if (_nothing_to_drag) {
5814                 return;
5815         }
5816 }
5817
5818 void
5819 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5820 {
5821         if (_nothing_to_drag && !first_move) {
5822                 return;
5823         }
5824
5825         if (first_move) {
5826                 _editor->begin_reversible_command (_("automation range move"));
5827
5828                 if (!_ranges.empty()) {
5829
5830                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5831
5832                                 framecnt_t const half = (i->start + i->end) / 2;
5833
5834                                 /* find the line that this audio range starts in */
5835                                 list<Line>::iterator j = _lines.begin();
5836                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5837                                         ++j;
5838                                 }
5839
5840                                 if (j != _lines.end()) {
5841                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5842
5843                                 /* j is the line that this audio range starts in; fade into it;
5844                                    64 samples length plucked out of thin air.
5845                                 */
5846
5847                                         framepos_t a = i->start + 64;
5848                                         if (a > half) {
5849                                                 a = half;
5850                                         }
5851
5852                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5853                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5854
5855                                         XMLNode &before = the_list->get_state();
5856                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5857                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5858
5859                                         if (add_p || add_q) {
5860                                                 _editor->session()->add_command (
5861                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5862                                         }
5863                                 }
5864
5865                                 /* same thing for the end */
5866
5867                                 j = _lines.begin();
5868                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5869                                         ++j;
5870                                 }
5871
5872                                 if (j != _lines.end()) {
5873                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5874
5875                                         /* j is the line that this audio range starts in; fade out of it;
5876                                            64 samples length plucked out of thin air.
5877                                         */
5878
5879                                         framepos_t b = i->end - 64;
5880                                         if (b < half) {
5881                                                 b = half;
5882                                         }
5883
5884                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5885                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5886
5887                                         XMLNode &before = the_list->get_state();
5888                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5889                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5890
5891                                         if (add_p || add_q) {
5892                                                 _editor->session()->add_command (
5893                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5894                                         }
5895                                 }
5896                         }
5897
5898                         _nothing_to_drag = true;
5899
5900                         /* Find all the points that should be dragged and put them in the relevant
5901                            points lists in the Line structs.
5902                         */
5903
5904                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5905
5906                                 uint32_t const N = i->line->npoints ();
5907                                 for (uint32_t j = 0; j < N; ++j) {
5908
5909                                         /* here's a control point on this line */
5910                                         ControlPoint* p = i->line->nth (j);
5911                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5912
5913                                         /* see if it's inside a range */
5914                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5915                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5916                                                 ++k;
5917                                         }
5918
5919                                         if (k != _ranges.end()) {
5920                                                 /* dragging this point */
5921                                                 _nothing_to_drag = false;
5922                                                 i->points.push_back (p);
5923                                         }
5924                                 }
5925                         }
5926                 }
5927
5928                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5929                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5930                 }
5931         }
5932
5933         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5934                 float const f = y_fraction (l->line, current_pointer_y());
5935                 /* we are ignoring x position for this drag, so we can just pass in anything */
5936                 pair<double, float> result;
5937                 uint32_t ignored;
5938                 result = l->line->drag_motion (0, f, true, false, ignored);
5939                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5940         }
5941 }
5942
5943 void
5944 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5945 {
5946         if (_nothing_to_drag || !motion_occurred) {
5947                 return;
5948         }
5949
5950         motion (event, false);
5951         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5952                 i->line->end_drag (false, 0);
5953         }
5954
5955         _editor->commit_reversible_command ();
5956 }
5957
5958 void
5959 AutomationRangeDrag::aborted (bool)
5960 {
5961         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5962                 i->line->reset ();
5963         }
5964 }
5965
5966 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
5967         : view (v)
5968         , initial_time_axis_view (itav)
5969 {
5970         /* note that time_axis_view may be null if the regionview was created
5971          * as part of a copy operation.
5972          */
5973         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
5974         layer = v->region()->layer ();
5975         initial_y = v->get_canvas_group()->position().y;
5976         initial_playlist = v->region()->playlist ();
5977         initial_position = v->region()->position ();
5978         initial_end = v->region()->position () + v->region()->length ();
5979 }
5980
5981 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
5982         : Drag (e, i->canvas_item ())
5983         , _region_view (r)
5984         , _patch_change (i)
5985         , _cumulative_dx (0)
5986 {
5987         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
5988                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
5989                                                    grab_frame()));
5990 }
5991
5992 void
5993 PatchChangeDrag::motion (GdkEvent* ev, bool)
5994 {
5995         framepos_t f = adjusted_current_frame (ev);
5996         boost::shared_ptr<Region> r = _region_view->region ();
5997         f = max (f, r->position ());
5998         f = min (f, r->last_frame ());
5999
6000         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6001         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6002         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6003         _cumulative_dx = dxu;
6004 }
6005
6006 void
6007 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6008 {
6009         if (!movement_occurred) {
6010                 return;
6011         }
6012
6013         boost::shared_ptr<Region> r (_region_view->region ());
6014         framepos_t f = adjusted_current_frame (ev);
6015         f = max (f, r->position ());
6016         f = min (f, r->last_frame ());
6017
6018         _region_view->move_patch_change (
6019                 *_patch_change,
6020                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6021                 );
6022 }
6023
6024 void
6025 PatchChangeDrag::aborted (bool)
6026 {
6027         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6028 }
6029
6030 void
6031 PatchChangeDrag::setup_pointer_frame_offset ()
6032 {
6033         boost::shared_ptr<Region> region = _region_view->region ();
6034         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6035 }
6036
6037 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6038         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6039         , _region_view (rv)
6040 {
6041
6042 }
6043
6044 void
6045 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6046 {
6047         _region_view->update_drag_selection (
6048                 x1, x2, y1, y2,
6049                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6050 }
6051
6052 void
6053 MidiRubberbandSelectDrag::deselect_things ()
6054 {
6055         /* XXX */
6056 }
6057
6058 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6059         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6060         , _region_view (rv)
6061 {
6062         _vertical_only = true;
6063 }
6064
6065 void
6066 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6067 {
6068         double const y = _region_view->midi_view()->y_position ();
6069
6070         y1 = max (0.0, y1 - y);
6071         y2 = max (0.0, y2 - y);
6072
6073         _region_view->update_vertical_drag_selection (
6074                 y1,
6075                 y2,
6076                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6077                 );
6078 }
6079
6080 void
6081 MidiVerticalSelectDrag::deselect_things ()
6082 {
6083         /* XXX */
6084 }
6085
6086 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6087         : RubberbandSelectDrag (e, i)
6088 {
6089
6090 }
6091
6092 void
6093 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6094 {
6095         if (drag_in_progress) {
6096                 /* We just want to select things at the end of the drag, not during it */
6097                 return;
6098         }
6099
6100         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6101
6102         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6103
6104         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6105
6106         _editor->commit_reversible_selection_op ();
6107 }
6108
6109 void
6110 EditorRubberbandSelectDrag::deselect_things ()
6111 {
6112         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6113
6114         _editor->selection->clear_tracks();
6115         _editor->selection->clear_regions();
6116         _editor->selection->clear_points ();
6117         _editor->selection->clear_lines ();
6118         _editor->selection->clear_midi_notes ();
6119
6120         _editor->commit_reversible_selection_op();
6121 }
6122
6123 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6124         : Drag (e, i)
6125         , _region_view (rv)
6126         , _drag_rect (0)
6127 {
6128         _note[0] = _note[1] = 0;
6129 }
6130
6131 NoteCreateDrag::~NoteCreateDrag ()
6132 {
6133         delete _drag_rect;
6134 }
6135
6136 framecnt_t
6137 NoteCreateDrag::grid_frames (framepos_t t) const
6138 {
6139         bool success;
6140         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6141         if (!success) {
6142                 grid_beats = Evoral::Beats(1);
6143         }
6144
6145         return _region_view->region_beats_to_region_frames (grid_beats);
6146 }
6147
6148 void
6149 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6150 {
6151         Drag::start_grab (event, cursor);
6152
6153         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6154
6155         framepos_t pf = _drags->current_pointer_frame ();
6156         framecnt_t const g = grid_frames (pf);
6157
6158         /* Hack so that we always snap to the note that we are over, instead of snapping
6159            to the next one if we're more than halfway through the one we're over.
6160         */
6161         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6162                 pf -= g / 2;
6163         }
6164
6165         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6166         _note[1] = _note[0];
6167
6168         MidiStreamView* sv = _region_view->midi_stream_view ();
6169         double const x = _editor->sample_to_pixel (_note[0]);
6170         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6171
6172         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6173         _drag_rect->set_outline_all ();
6174         _drag_rect->set_outline_color (0xffffff99);
6175         _drag_rect->set_fill_color (0xffffff66);
6176 }
6177
6178 void
6179 NoteCreateDrag::motion (GdkEvent* event, bool)
6180 {
6181         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6182         double const x0 = _editor->sample_to_pixel (_note[0]);
6183         double const x1 = _editor->sample_to_pixel (_note[1]);
6184         _drag_rect->set_x0 (std::min(x0, x1));
6185         _drag_rect->set_x1 (std::max(x0, x1));
6186 }
6187
6188 void
6189 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6190 {
6191         if (!had_movement) {
6192                 return;
6193         }
6194
6195         framepos_t const start = min (_note[0], _note[1]);
6196         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6197
6198         framecnt_t const g = grid_frames (start);
6199         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6200
6201         if (_editor->snap_mode() == SnapNormal && length < g) {
6202                 length = g;
6203         }
6204
6205         Evoral::Beats length_beats = max (
6206                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6207
6208         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6209 }
6210
6211 double
6212 NoteCreateDrag::y_to_region (double y) const
6213 {
6214         double x = 0;
6215         _region_view->get_canvas_group()->canvas_to_item (x, y);
6216         return y;
6217 }
6218
6219 void
6220 NoteCreateDrag::aborted (bool)
6221 {
6222
6223 }
6224
6225 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6226         : Drag (e, i)
6227         , arv (rv)
6228         , start (start_yn)
6229 {
6230         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6231 }
6232
6233 void
6234 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6235 {
6236         Drag::start_grab (event, cursor);
6237 }
6238
6239 void
6240 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6241 {
6242         double distance;
6243         double new_length;
6244         framecnt_t len;
6245
6246         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6247
6248         if (start) {
6249                 distance = _drags->current_pointer_x() - grab_x();
6250                 len = ar->fade_in()->back()->when;
6251         } else {
6252                 distance = grab_x() - _drags->current_pointer_x();
6253                 len = ar->fade_out()->back()->when;
6254         }
6255
6256         /* how long should it be ? */
6257
6258         new_length = len + _editor->pixel_to_sample (distance);
6259
6260         /* now check with the region that this is legal */
6261
6262         new_length = ar->verify_xfade_bounds (new_length, start);
6263
6264         if (start) {
6265                 arv->reset_fade_in_shape_width (ar, new_length);
6266         } else {
6267                 arv->reset_fade_out_shape_width (ar, new_length);
6268         }
6269 }
6270
6271 void
6272 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6273 {
6274         double distance;
6275         double new_length;
6276         framecnt_t len;
6277
6278         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6279
6280         if (start) {
6281                 distance = _drags->current_pointer_x() - grab_x();
6282                 len = ar->fade_in()->back()->when;
6283         } else {
6284                 distance = grab_x() - _drags->current_pointer_x();
6285                 len = ar->fade_out()->back()->when;
6286         }
6287
6288         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6289
6290         _editor->begin_reversible_command ("xfade trim");
6291         ar->playlist()->clear_owned_changes ();
6292
6293         if (start) {
6294                 ar->set_fade_in_length (new_length);
6295         } else {
6296                 ar->set_fade_out_length (new_length);
6297         }
6298
6299         /* Adjusting the xfade may affect other regions in the playlist, so we need
6300            to get undo Commands from the whole playlist rather than just the
6301            region.
6302         */
6303
6304         vector<Command*> cmds;
6305         ar->playlist()->rdiff (cmds);
6306         _editor->session()->add_commands (cmds);
6307         _editor->commit_reversible_command ();
6308
6309 }
6310
6311 void
6312 CrossfadeEdgeDrag::aborted (bool)
6313 {
6314         if (start) {
6315                 // arv->redraw_start_xfade ();
6316         } else {
6317                 // arv->redraw_end_xfade ();
6318         }
6319 }
6320
6321 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6322         : Drag (e, item, true)
6323         , line (new EditorCursor (*e))
6324 {
6325         line->set_position (pos);
6326         line->show ();
6327 }
6328
6329 RegionCutDrag::~RegionCutDrag ()
6330 {
6331         delete line;
6332 }
6333
6334 void
6335 RegionCutDrag::motion (GdkEvent*, bool)
6336 {
6337         framepos_t where = _drags->current_pointer_frame();
6338         _editor->snap_to (where);
6339
6340         line->set_position (where);
6341 }
6342
6343 void
6344 RegionCutDrag::finished (GdkEvent*, bool)
6345 {
6346         _editor->get_track_canvas()->canvas()->re_enter();
6347
6348         framepos_t pos = _drags->current_pointer_frame();
6349
6350         line->hide ();
6351
6352         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6353
6354         if (rs.empty()) {
6355                 return;
6356         }
6357
6358         _editor->split_regions_at (pos, rs);
6359 }
6360
6361 void
6362 RegionCutDrag::aborted (bool)
6363 {
6364 }