prepare meter-widget for dual background color
[ardour.git] / 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/dB.h"
36 #include "ardour/midi_region.h"
37 #include "ardour/operations.h"
38 #include "ardour/region_factory.h"
39 #include "ardour/session.h"
40
41 #include "editor.h"
42 #include "i18n.h"
43 #include "keyboard.h"
44 #include "audio_region_view.h"
45 #include "midi_region_view.h"
46 #include "ardour_ui.h"
47 #include "gui_thread.h"
48 #include "control_point.h"
49 #include "utils.h"
50 #include "region_gain_line.h"
51 #include "editor_drag.h"
52 #include "audio_time_axis.h"
53 #include "midi_time_axis.h"
54 #include "canvas-note.h"
55 #include "selection.h"
56 #include "midi_selection.h"
57 #include "automation_time_axis.h"
58 #include "debug.h"
59 #include "editor_cursors.h"
60 #include "mouse_cursors.h"
61 #include "verbose_cursor.h"
62
63 using namespace std;
64 using namespace ARDOUR;
65 using namespace PBD;
66 using namespace Gtk;
67 using namespace Gtkmm2ext;
68 using namespace Editing;
69 using namespace ArdourCanvas;
70
71 using Gtkmm2ext::Keyboard;
72
73 double ControlPointDrag::_zero_gain_fraction = -1.0;
74
75 DragManager::DragManager (Editor* e)
76         : _editor (e)
77         , _ending (false)
78         , _current_pointer_frame (0)
79 {
80 }
81
82 DragManager::~DragManager ()
83 {
84         abort ();
85 }
86
87 /** Call abort for each active drag */
88 void
89 DragManager::abort ()
90 {
91         _ending = true;
92
93         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
94                 (*i)->abort ();
95                 delete *i;
96         }
97
98         if (!_drags.empty ()) {
99                 _editor->set_follow_playhead (_old_follow_playhead, false);
100         }
101
102         _drags.clear ();
103
104         _ending = false;
105 }
106
107 void
108 DragManager::add (Drag* d)
109 {
110         d->set_manager (this);
111         _drags.push_back (d);
112 }
113
114 void
115 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
116 {
117         d->set_manager (this);
118         _drags.push_back (d);
119         start_grab (e, c);
120 }
121
122 void
123 DragManager::start_grab (GdkEvent* e, Gdk::Cursor* c)
124 {
125         /* Prevent follow playhead during the drag to be nice to the user */
126         _old_follow_playhead = _editor->follow_playhead ();
127         _editor->set_follow_playhead (false);
128
129         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
130
131         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
132                 (*i)->start_grab (e, c);
133         }
134 }
135
136 /** Call end_grab for each active drag.
137  *  @return true if any drag reported movement having occurred.
138  */
139 bool
140 DragManager::end_grab (GdkEvent* e)
141 {
142         _ending = true;
143
144         bool r = false;
145         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
146                 bool const t = (*i)->end_grab (e);
147                 if (t) {
148                         r = true;
149                 }
150                 delete *i;
151         }
152
153         _drags.clear ();
154
155         _ending = false;
156
157         _editor->set_follow_playhead (_old_follow_playhead, false);
158
159         return r;
160 }
161
162 bool
163 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
164 {
165         bool r = false;
166
167         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
168
169         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
170                 bool const t = (*i)->motion_handler (e, from_autoscroll);
171                 if (t) {
172                         r = true;
173                 }
174
175         }
176
177         return r;
178 }
179
180 bool
181 DragManager::have_item (ArdourCanvas::Item* i) const
182 {
183         list<Drag*>::const_iterator j = _drags.begin ();
184         while (j != _drags.end() && (*j)->item () != i) {
185                 ++j;
186         }
187
188         return j != _drags.end ();
189 }
190
191 Drag::Drag (Editor* e, ArdourCanvas::Item* i)
192         : _editor (e)
193         , _item (i)
194         , _pointer_frame_offset (0)
195         , _move_threshold_passed (false)
196         , _raw_grab_frame (0)
197         , _grab_frame (0)
198         , _last_pointer_frame (0)
199 {
200
201 }
202
203 void
204 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t time)
205 {
206         _item->ungrab (0);
207         _item = new_item;
208
209         if (cursor == 0) {
210                 _item->grab (Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK, time);
211         } else {
212                 _item->grab (Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK, *cursor, time);
213         }
214 }
215
216 void
217 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
218 {
219         // if dragging with button2, the motion is x constrained, with Alt-button2 it is y constrained
220
221         if (Keyboard::is_button2_event (&event->button)) {
222                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::SecondaryModifier)) {
223                         _y_constrained = true;
224                         _x_constrained = false;
225                 } else {
226                         _y_constrained = false;
227                         _x_constrained = true;
228                 }
229         } else {
230                 _x_constrained = false;
231                 _y_constrained = false;
232         }
233
234         _raw_grab_frame = _editor->event_frame (event, &_grab_x, &_grab_y);
235         setup_pointer_frame_offset ();
236         _grab_frame = adjusted_frame (_raw_grab_frame, event);
237         _last_pointer_frame = _grab_frame;
238         _last_pointer_x = _grab_x;
239         _last_pointer_y = _grab_y;
240
241         if (cursor == 0) {
242                 _item->grab (Gdk::POINTER_MOTION_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK,
243                              event->button.time);
244         } else {
245                 _item->grab (Gdk::POINTER_MOTION_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK,
246                              *cursor,
247                              event->button.time);
248         }
249
250         if (_editor->session() && _editor->session()->transport_rolling()) {
251                 _was_rolling = true;
252         } else {
253                 _was_rolling = false;
254         }
255
256         switch (_editor->snap_type()) {
257         case SnapToRegionStart:
258         case SnapToRegionEnd:
259         case SnapToRegionSync:
260         case SnapToRegionBoundary:
261                 _editor->build_region_boundary_cache ();
262                 break;
263         default:
264                 break;
265         }
266 }
267
268 /** Call to end a drag `successfully'.  Ungrabs item and calls
269  *  subclass' finished() method.
270  *
271  *  @param event GDK event, or 0.
272  *  @return true if some movement occurred, otherwise false.
273  */
274 bool
275 Drag::end_grab (GdkEvent* event)
276 {
277         _editor->stop_canvas_autoscroll ();
278
279         _item->ungrab (event ? event->button.time : 0);
280
281         finished (event, _move_threshold_passed);
282
283         _editor->verbose_cursor()->hide ();
284
285         return _move_threshold_passed;
286 }
287
288 framepos_t
289 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
290 {
291         framepos_t pos = 0;
292
293         if (f > _pointer_frame_offset) {
294                 pos = f - _pointer_frame_offset;
295         }
296
297         if (snap) {
298                 _editor->snap_to_with_modifier (pos, event);
299         }
300
301         return pos;
302 }
303
304 framepos_t
305 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
306 {
307         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
308 }
309
310 bool
311 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
312 {
313         /* check to see if we have moved in any way that matters since the last motion event */
314         if (_move_threshold_passed &&
315             (!x_movement_matters() || _last_pointer_frame == adjusted_current_frame (event)) &&
316             (!y_movement_matters() || _last_pointer_y == _drags->current_pointer_y ()) ) {
317                 return false;
318         }
319
320         pair<framecnt_t, int> const threshold = move_threshold ();
321
322         bool const old_move_threshold_passed = _move_threshold_passed;
323
324         if (!from_autoscroll && !_move_threshold_passed) {
325
326                 bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
327                 bool const yp = (::fabs ((_drags->current_pointer_y () - _grab_y)) >= threshold.second);
328
329                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
330         }
331
332         if (active (_editor->mouse_mode) && _move_threshold_passed) {
333
334                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
335                         if (!from_autoscroll) {
336                                 bool const moving_left = _drags->current_pointer_x() < _last_pointer_x;
337                                 bool const moving_up = _drags->current_pointer_y() < _last_pointer_y;
338                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll (), moving_left, moving_up);
339                         }
340
341                         motion (event, _move_threshold_passed != old_move_threshold_passed);
342
343                         _last_pointer_x = _drags->current_pointer_x ();
344                         _last_pointer_y = _drags->current_pointer_y ();
345                         _last_pointer_frame = adjusted_current_frame (event);
346
347                         return true;
348                 }
349         }
350         return false;
351 }
352
353 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
354 void
355 Drag::abort ()
356 {
357         if (_item) {
358                 _item->ungrab (0);
359         }
360
361         aborted (_move_threshold_passed);
362
363         _editor->stop_canvas_autoscroll ();
364         _editor->verbose_cursor()->hide ();
365 }
366
367 void
368 Drag::show_verbose_cursor_time (framepos_t frame)
369 {
370         _editor->verbose_cursor()->set_time (
371                 frame,
372                 _drags->current_pointer_x() + 10 - _editor->horizontal_position(),
373                 _drags->current_pointer_y() + 10 - _editor->vertical_adjustment.get_value() + _editor->canvas_timebars_vsize
374                 );
375
376         _editor->verbose_cursor()->show ();
377 }
378
379 void
380 Drag::show_verbose_cursor_duration (framepos_t start, framepos_t end, double xoffset)
381 {
382         _editor->verbose_cursor()->show (xoffset);
383
384         _editor->verbose_cursor()->set_duration (
385                 start, end,
386                 _drags->current_pointer_x() + 10 - _editor->horizontal_position(),
387                 _drags->current_pointer_y() + 10 - _editor->vertical_adjustment.get_value() + _editor->canvas_timebars_vsize
388                 );
389 }
390
391 void
392 Drag::show_verbose_cursor_text (string const & text)
393 {
394         _editor->verbose_cursor()->show ();
395
396         _editor->verbose_cursor()->set (
397                 text,
398                 _drags->current_pointer_x() + 10 - _editor->horizontal_position(),
399                 _drags->current_pointer_y() + 10 - _editor->vertical_adjustment.get_value() + _editor->canvas_timebars_vsize
400                 );
401 }
402
403 boost::shared_ptr<Region>
404 Drag::add_midi_region (MidiTimeAxisView* view)
405 {
406         if (_editor->session()) {
407                 const TempoMap& map (_editor->session()->tempo_map());
408                 framecnt_t pos = grab_frame();
409                 const Meter& m = map.meter_at (pos);
410                 /* not that the frame rate used here can be affected by pull up/down which
411                    might be wrong.
412                 */
413                 framecnt_t len = m.frames_per_bar (map.tempo_at (pos), _editor->session()->frame_rate());
414                 return view->add_region (grab_frame(), len, true);
415         }
416
417         return boost::shared_ptr<Region>();
418 }
419
420 struct EditorOrderTimeAxisViewSorter {
421     bool operator() (TimeAxisView* a, TimeAxisView* b) {
422             RouteTimeAxisView* ra = dynamic_cast<RouteTimeAxisView*> (a);
423             RouteTimeAxisView* rb = dynamic_cast<RouteTimeAxisView*> (b);
424             assert (ra && rb);
425             return ra->route()->order_key (EditorSort) < rb->route()->order_key (EditorSort);
426     }
427 };
428
429 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
430         : Drag (e, i),
431           _primary (p)
432 {
433         _editor->visible_order_range (&_visible_y_low, &_visible_y_high);
434
435         /* Make a list of tracks to refer to during the drag; we include hidden tracks,
436            as some of the regions we are dragging may be on such tracks.
437         */
438
439         TrackViewList track_views = _editor->track_views;
440         track_views.sort (EditorOrderTimeAxisViewSorter ());
441
442         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
443                 _time_axis_views.push_back (*i);
444                 
445                 TimeAxisView::Children children_list = (*i)->get_child_list ();
446                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
447                         _time_axis_views.push_back (j->get());
448                 }
449         }
450
451         /* the list of views can be empty at this point if this is a region list-insert drag
452          */
453
454         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
455                 _views.push_back (DraggingView (*i, this));
456         }
457
458         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), boost::bind (&RegionDrag::region_going_away, this, _1), gui_context());
459 }
460
461 void
462 RegionDrag::region_going_away (RegionView* v)
463 {
464         list<DraggingView>::iterator i = _views.begin ();
465         while (i != _views.end() && i->view != v) {
466                 ++i;
467         }
468
469         if (i != _views.end()) {
470                 _views.erase (i);
471         }
472 }
473
474 /** Given a TimeAxisView, return the index of it into the _time_axis_views vector,
475  *  or -1 if it is not found.
476  */
477 int
478 RegionDrag::find_time_axis_view (TimeAxisView* t) const
479 {
480         int i = 0;
481         int const N = _time_axis_views.size ();
482         while (i < N && _time_axis_views[i] != t) {
483                 ++i;
484         }
485
486         if (i == N) {
487                 return -1;
488         }
489
490         return i;
491 }
492
493 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
494         : RegionDrag (e, i, p, v),
495           _brushing (b),
496           _total_x_delta (0)
497 {
498
499 }
500
501
502 void
503 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
504 {
505         Drag::start_grab (event, cursor);
506
507         show_verbose_cursor_time (_last_frame_position);
508
509         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (_drags->current_pointer_y ());
510         _last_pointer_time_axis_view = find_time_axis_view (tv.first);
511         _last_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
512 }
513
514 double
515 RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
516 {
517         /* compute the amount of pointer motion in frames, and where
518            the region would be if we moved it by that much.
519         */
520         *pending_region_position = adjusted_current_frame (event);
521
522         framepos_t sync_frame;
523         framecnt_t sync_offset;
524         int32_t sync_dir;
525
526         sync_offset = _primary->region()->sync_offset (sync_dir);
527
528         /* we don't handle a sync point that lies before zero.
529          */
530         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
531
532                 sync_frame = *pending_region_position + (sync_dir*sync_offset);
533
534                 _editor->snap_to_with_modifier (sync_frame, event);
535
536                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame);
537
538         } else {
539                 *pending_region_position = _last_frame_position;
540         }
541
542         if (*pending_region_position > max_framepos - _primary->region()->length()) {
543                 *pending_region_position = _last_frame_position;
544         }
545
546         double dx = 0;
547
548         /* in locked edit mode, reverse the usual meaning of _x_constrained */
549         bool const x_move_allowed = Config->get_edit_mode() == Lock ? _x_constrained : !_x_constrained;
550
551         if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
552
553                 /* x movement since last time (in pixels) */
554                 dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->frames_per_unit;
555
556                 /* total x movement */
557                 framecnt_t total_dx = *pending_region_position;
558                 if (regions_came_from_canvas()) {
559                         total_dx = total_dx - grab_frame ();
560                 }
561
562                 /* check that no regions have gone off the start of the session */
563                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
564                         if ((i->view->region()->position() + total_dx) < 0) {
565                                 dx = 0;
566                                 *pending_region_position = _last_frame_position;
567                                 break;
568                         }
569                 }
570
571                 _last_frame_position = *pending_region_position;
572         }
573
574         return dx;
575 }
576
577 bool
578 RegionMotionDrag::y_movement_allowed (int delta_track, double delta_layer) const
579 {
580         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
581                 int const n = i->time_axis_view + delta_track;
582                 if (n < 0 || n >= int (_time_axis_views.size())) {
583                         /* off the top or bottom track */
584                         return false;
585                 }
586
587                 RouteTimeAxisView const * to = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[n]);
588                 if (to == 0 || !to->is_track() || to->track()->data_type() != i->view->region()->data_type()) {
589                         /* not a track, or the wrong type */
590                         return false;
591                 }
592
593                 double const l = i->layer + delta_layer;
594
595                 /* Note that we allow layer to be up to 0.5 below zero, as this is used by `Expanded'
596                    mode to allow the user to place a region below another on layer 0.
597                 */
598                 if (delta_track == 0 && (l < -0.5 || l >= int (to->view()->layers()))) {
599                         /* Off the top or bottom layer; note that we only refuse if the track hasn't changed.
600                            If it has, the layers will be munged later anyway, so it's ok.
601                         */
602                         return false;
603                 }
604         }
605
606         /* all regions being dragged are ok with this change */
607         return true;
608 }
609
610 void
611 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
612 {
613         assert (!_views.empty ());
614
615         /* Find the TimeAxisView that the pointer is now over */
616         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (_drags->current_pointer_y ());
617
618         if (first_move && tv.first->view()->layer_display() == Stacked) {
619                 tv.first->view()->set_layer_display (Expanded);
620         }
621
622         /* Bail early if we're not over a track */
623         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv.first);
624         if (!rtv || !rtv->is_track()) {
625                 _editor->verbose_cursor()->hide ();
626                 return;
627         }
628
629         /* Note: time axis views in this method are often expressed as an index into the _time_axis_views vector */
630
631         /* Here's the current pointer position in terms of time axis view and layer */
632         int const current_pointer_time_axis_view = find_time_axis_view (tv.first);
633         double const current_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
634
635         /* Work out the change in x */
636         framepos_t pending_region_position;
637         double const x_delta = compute_x_delta (event, &pending_region_position);
638
639         /* Work out the change in y */
640         int delta_time_axis_view = current_pointer_time_axis_view - _last_pointer_time_axis_view;
641         double delta_layer = current_pointer_layer - _last_pointer_layer;
642
643         if (!y_movement_allowed (delta_time_axis_view, delta_layer)) {
644                 /* this y movement is not allowed, so do no y movement this time */
645                 delta_time_axis_view = 0;
646                 delta_layer = 0;
647         }
648
649         if (x_delta == 0 && delta_time_axis_view == 0 && delta_layer == 0 && !first_move) {
650                 /* haven't reached next snap point, and we're not switching
651                    trackviews nor layers. nothing to do.
652                 */
653                 return;
654         }
655
656         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
657
658         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
659
660                 RegionView* rv = i->view;
661
662                 if (rv->region()->locked() || rv->region()->video_locked()) {
663                         continue;
664                 }
665
666                 if (first_move) {
667
668                         rv->drag_start (); 
669
670                         /* Absolutely no idea why this is necessary, but it is; without
671                            it, the region view disappears after the reparent.
672                         */
673                         _editor->update_canvas_now ();
674                         
675                         /* Reparent to a non scrolling group so that we can keep the
676                            region selection above all time axis views.
677                            Reparenting means that we will have to move the region view
678                            later, as the two parent groups have different coordinates.
679                         */
680
681                         rv->get_canvas_group()->reparent (*(_editor->_region_motion_group));
682                         
683                         rv->fake_set_opaque (true);
684                 }
685
686                 /* If we have moved tracks, we'll fudge the layer delta so that the
687                    region gets moved back onto layer 0 on its new track; this avoids
688                    confusion when dragging regions from non-zero layers onto different
689                    tracks.
690                 */
691                 double this_delta_layer = delta_layer;
692                 if (delta_time_axis_view != 0) {
693                         this_delta_layer = - i->layer;
694                 }
695
696                 /* The TimeAxisView that this region is now on */
697                 TimeAxisView* tv = _time_axis_views[i->time_axis_view + delta_time_axis_view];
698
699                 /* Ensure it is moved from stacked -> expanded if appropriate */
700                 if (tv->view()->layer_display() == Stacked) {
701                         tv->view()->set_layer_display (Expanded);
702                 }
703                 
704                 /* We're only allowed to go -ve in layer on Expanded views */
705                 if (tv->view()->layer_display() != Expanded && (i->layer + this_delta_layer) < 0) {
706                         this_delta_layer = - i->layer;
707                 }
708                 
709                 /* Set height */
710                 rv->set_height (tv->view()->child_height ());
711                 
712                 /* Update show/hidden status as the region view may have come from a hidden track,
713                    or have moved to one.
714                 */
715                 if (tv->hidden ()) {
716                         rv->get_canvas_group()->hide ();
717                 } else {
718                         rv->get_canvas_group()->show ();
719                 }
720
721                 /* Update the DraggingView */
722                 i->time_axis_view += delta_time_axis_view;
723                 i->layer += this_delta_layer;
724
725                 if (_brushing) {
726                         _editor->mouse_brush_insert_region (rv, pending_region_position);
727                 } else {
728                         double x = 0;
729                         double y = 0;
730
731                         /* Get the y coordinate of the top of the track that this region is now on */
732                         tv->canvas_display()->i2w (x, y);
733                         y += _editor->get_trackview_group_vertical_offset();
734                         
735                         /* And adjust for the layer that it should be on */
736                         StreamView* cv = tv->view ();
737                         switch (cv->layer_display ()) {
738                         case Overlaid:
739                                 break;
740                         case Stacked:
741                                 y += (cv->layers() - i->layer - 1) * cv->child_height ();
742                                 break;
743                         case Expanded:
744                                 y += (cv->layers() - i->layer - 0.5) * 2 * cv->child_height ();
745                                 break;
746                         }
747
748                         /* Now move the region view */
749                         rv->move (x_delta, y - rv->get_canvas_group()->property_y());
750                 }
751
752         } /* foreach region */
753
754         _total_x_delta += x_delta;
755
756         if (first_move) {
757                 _editor->cursor_group->raise_to_top();
758         }
759
760         if (x_delta != 0 && !_brushing) {
761                 show_verbose_cursor_time (_last_frame_position);
762         }
763
764         _last_pointer_time_axis_view += delta_time_axis_view;
765         _last_pointer_layer += delta_layer;
766 }
767
768 void
769 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
770 {
771         if (_copy && first_move) {
772
773                 /* duplicate the regionview(s) and region(s) */
774
775                 list<DraggingView> new_regionviews;
776
777                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
778
779                         RegionView* rv = i->view;
780                         AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
781                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
782
783                         const boost::shared_ptr<const Region> original = rv->region();
784                         boost::shared_ptr<Region> region_copy = RegionFactory::create (original, true);
785                         region_copy->set_position (original->position());
786
787                         RegionView* nrv;
788                         if (arv) {
789                                 boost::shared_ptr<AudioRegion> audioregion_copy
790                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
791
792                                 nrv = new AudioRegionView (*arv, audioregion_copy);
793                         } else if (mrv) {
794                                 boost::shared_ptr<MidiRegion> midiregion_copy
795                                         = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
796                                 nrv = new MidiRegionView (*mrv, midiregion_copy);
797                         } else {
798                                 continue;
799                         }
800
801                         nrv->get_canvas_group()->show ();
802                         new_regionviews.push_back (DraggingView (nrv, this));
803
804                         /* swap _primary to the copy */
805
806                         if (rv == _primary) {
807                                 _primary = nrv;
808                         }
809
810                         /* ..and deselect the one we copied */
811
812                         rv->set_selected (false);
813                 }
814
815                 if (!new_regionviews.empty()) {
816
817                         /* reflect the fact that we are dragging the copies */
818
819                         _views = new_regionviews;
820
821                         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
822
823                         /*
824                           sync the canvas to what we think is its current state
825                           without it, the canvas seems to
826                           "forget" to update properly after the upcoming reparent()
827                           ..only if the mouse is in rapid motion at the time of the grab.
828                           something to do with regionview creation taking so long?
829                         */
830                         _editor->update_canvas_now();
831                 }
832         }
833
834         RegionMotionDrag::motion (event, first_move);
835 }
836
837 void
838 RegionMotionDrag::finished (GdkEvent *, bool)
839 {
840         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
841                 if (!(*i)->view()) {
842                         continue;
843                 }
844
845                 if ((*i)->view()->layer_display() == Expanded) {
846                         (*i)->view()->set_layer_display (Stacked);
847                 }
848         }
849 }
850
851 void
852 RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
853 {
854         RegionMotionDrag::finished (ev, movement_occurred);
855         
856         if (!movement_occurred) {
857                 /* just a click */
858                 return;
859         }
860
861         /* reverse this here so that we have the correct logic to finalize
862            the drag.
863         */
864
865         if (Config->get_edit_mode() == Lock) {
866                 _x_constrained = !_x_constrained;
867         }
868
869         assert (!_views.empty ());
870
871         /* We might have hidden region views so that they weren't visible during the drag
872            (when they have been reparented).  Now everything can be shown again, as region
873            views are back in their track parent groups.
874         */
875         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
876                 i->view->get_canvas_group()->show ();
877         }
878         
879         bool const changed_position = (_last_frame_position != _primary->region()->position());
880         bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
881         framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
882         
883         _editor->update_canvas_now ();
884
885         if (_copy) {
886
887                 finished_copy (
888                         changed_position,
889                         changed_tracks,
890                         drag_delta
891                         );
892
893         } else {
894
895                 finished_no_copy (
896                         changed_position,
897                         changed_tracks,
898                         drag_delta
899                         );
900
901         }
902
903         _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
904 }
905
906 void
907 RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta)
908 {
909         RegionSelection new_views;
910         PlaylistSet modified_playlists;
911         list<RegionView*> views_to_delete;
912
913         if (_brushing) {
914                 /* all changes were made during motion event handlers */
915
916                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
917                         delete i->view;
918                 }
919
920                 _editor->commit_reversible_command ();
921                 return;
922         }
923
924         if (_x_constrained) {
925                 _editor->begin_reversible_command (Operations::fixed_time_region_copy);
926         } else {
927                 _editor->begin_reversible_command (Operations::region_copy);
928         }
929
930         /* insert the regions into their new playlists */
931         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
932
933                 if (i->view->region()->locked() || i->view->region()->video_locked()) {
934                         continue;
935                 }
936
937                 framepos_t where;
938
939                 if (changed_position && !_x_constrained) {
940                         where = i->view->region()->position() - drag_delta;
941                 } else {
942                         where = i->view->region()->position();
943                 }
944
945                 RegionView* new_view = insert_region_into_playlist (
946                         i->view->region(), dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]), i->layer, where, modified_playlists
947                         );
948
949                 if (new_view == 0) {
950                         continue;
951                 }
952
953                 new_views.push_back (new_view);
954
955                 /* we don't need the copied RegionView any more */
956                 views_to_delete.push_back (i->view);
957         }
958
959         /* Delete views that are no longer needed; we can't do this directly in the iteration over _views
960            because when views are deleted they are automagically removed from _views, which messes
961            up the iteration.
962         */
963         for (list<RegionView*>::iterator i = views_to_delete.begin(); i != views_to_delete.end(); ++i) {
964                 delete *i;
965         }
966
967         /* If we've created new regions either by copying or moving
968            to a new track, we want to replace the old selection with the new ones
969         */
970
971         if (new_views.size() > 0) {
972                 _editor->selection->set (new_views);
973         }
974
975         /* write commands for the accumulated diffs for all our modified playlists */
976         add_stateful_diff_commands_for_playlists (modified_playlists);
977
978         _editor->commit_reversible_command ();
979 }
980
981 void
982 RegionMoveDrag::finished_no_copy (
983         bool const changed_position,
984         bool const changed_tracks,
985         framecnt_t const drag_delta
986         )
987 {
988         RegionSelection new_views;
989         PlaylistSet modified_playlists;
990         PlaylistSet frozen_playlists;
991         set<RouteTimeAxisView*> views_to_update;
992
993         if (_brushing) {
994                 /* all changes were made during motion event handlers */
995                 _editor->commit_reversible_command ();
996                 return;
997         }
998
999         if (_x_constrained) {
1000                 _editor->begin_reversible_command (_("fixed time region drag"));
1001         } else {
1002                 _editor->begin_reversible_command (Operations::region_drag);
1003         }
1004
1005         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
1006
1007                 RegionView* rv = i->view;
1008
1009                 RouteTimeAxisView* const dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1010                 double const dest_layer = i->layer;
1011
1012                 if (rv->region()->locked() || rv->region()->video_locked()) {
1013                         ++i;
1014                         continue;
1015                 }
1016
1017                 views_to_update.insert (dest_rtv);
1018
1019                 framepos_t where;
1020
1021                 if (changed_position && !_x_constrained) {
1022                         where = rv->region()->position() - drag_delta;
1023                 } else {
1024                         where = rv->region()->position();
1025                 }
1026
1027                 if (changed_tracks) {
1028
1029                         /* insert into new playlist */
1030
1031                         RegionView* new_view = insert_region_into_playlist (
1032                                 RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, modified_playlists
1033                                 );
1034
1035                         if (new_view == 0) {
1036                                 ++i;
1037                                 continue;
1038                         }
1039
1040                         new_views.push_back (new_view);
1041
1042                         /* remove from old playlist */
1043
1044                         /* the region that used to be in the old playlist is not
1045                            moved to the new one - we use a copy of it. as a result,
1046                            any existing editor for the region should no longer be
1047                            visible.
1048                         */
1049                         rv->hide_region_editor();
1050                         rv->fake_set_opaque (false);
1051
1052                         remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
1053
1054                 } else {
1055
1056                         rv->region()->clear_changes ();
1057
1058                         /*
1059                            motion on the same track. plonk the previously reparented region
1060                            back to its original canvas group (its streamview).
1061                            No need to do anything for copies as they are fake regions which will be deleted.
1062                         */
1063
1064                         rv->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
1065                         rv->get_canvas_group()->property_y() = i->initial_y;
1066                         rv->drag_end ();
1067
1068                         /* just change the model */
1069
1070                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1071
1072                         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1073                                 playlist->set_layer (rv->region(), dest_layer);
1074                         }
1075
1076                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
1077
1078                         pair<PlaylistSet::iterator, bool> r = frozen_playlists.insert (playlist);
1079
1080                         if (r.second) {
1081                                 playlist->freeze ();
1082                         }
1083
1084                         /* this movement may result in a crossfade being modified, so we need to get undo
1085                            data from the playlist as well as the region.
1086                         */
1087
1088                         r = modified_playlists.insert (playlist);
1089                         if (r.second) {
1090                                 playlist->clear_changes ();
1091                         }
1092
1093                         rv->region()->set_position (where);
1094
1095                         _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
1096                 }
1097
1098                 if (changed_tracks) {
1099
1100                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1101                            was selected in all of them, then removing it from a playlist will have removed all
1102                            trace of it from _views (i.e. there were N regions selected, we removed 1,
1103                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1104                            corresponding regionview, and _views is now empty).
1105
1106                            This could have invalidated any and all iterators into _views.
1107
1108                            The heuristic we use here is: if the region selection is empty, break out of the loop
1109                            here. if the region selection is not empty, then restart the loop because we know that
1110                            we must have removed at least the region(view) we've just been working on as well as any
1111                            that we processed on previous iterations.
1112
1113                            EXCEPT .... if we are doing a copy drag, then _views hasn't been modified and
1114                            we can just iterate.
1115                         */
1116
1117
1118                         if (_views.empty()) {
1119                                 break;
1120                         } else {
1121                                 i = _views.begin();
1122                         }
1123
1124                 } else {
1125                         ++i;
1126                 }
1127         }
1128
1129         /* If we've created new regions either by copying or moving
1130            to a new track, we want to replace the old selection with the new ones
1131         */
1132
1133         if (new_views.size() > 0) {
1134                 _editor->selection->set (new_views);
1135         }
1136
1137         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1138                 (*p)->thaw();
1139         }
1140
1141         /* write commands for the accumulated diffs for all our modified playlists */
1142         add_stateful_diff_commands_for_playlists (modified_playlists);
1143
1144         _editor->commit_reversible_command ();
1145
1146         /* We have futzed with the layering of canvas items on our streamviews.
1147            If any region changed layer, this will have resulted in the stream
1148            views being asked to set up their region views, and all will be well.
1149            If not, we might now have badly-ordered region views.  Ask the StreamViews
1150            involved to sort themselves out, just in case.
1151         */
1152
1153         for (set<RouteTimeAxisView*>::iterator i = views_to_update.begin(); i != views_to_update.end(); ++i) {
1154                 (*i)->view()->playlist_layered ((*i)->track ());
1155         }
1156 }
1157
1158 /** Remove a region from a playlist, clearing the diff history of the playlist first if necessary.
1159  *  @param region Region to remove.
1160  *  @param playlist playlist To remove from.
1161  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1162  *  that clear_changes () is only called once per playlist.
1163  */
1164 void
1165 RegionMoveDrag::remove_region_from_playlist (
1166         boost::shared_ptr<Region> region,
1167         boost::shared_ptr<Playlist> playlist,
1168         PlaylistSet& modified_playlists
1169         )
1170 {
1171         pair<set<boost::shared_ptr<Playlist> >::iterator, bool> r = modified_playlists.insert (playlist);
1172
1173         if (r.second) {
1174                 playlist->clear_changes ();
1175         }
1176
1177         playlist->remove_region (region);
1178 }
1179
1180
1181 /** Insert a region into a playlist, handling the recovery of the resulting new RegionView, and
1182  *  clearing the playlist's diff history first if necessary.
1183  *  @param region Region to insert.
1184  *  @param dest_rtv Destination RouteTimeAxisView.
1185  *  @param dest_layer Destination layer.
1186  *  @param where Destination position.
1187  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1188  *  that clear_changes () is only called once per playlist.
1189  *  @return New RegionView, or 0 if no insert was performed.
1190  */
1191 RegionView *
1192 RegionMoveDrag::insert_region_into_playlist (
1193         boost::shared_ptr<Region> region,
1194         RouteTimeAxisView* dest_rtv,
1195         layer_t dest_layer,
1196         framecnt_t where,
1197         PlaylistSet& modified_playlists
1198         )
1199 {
1200         boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
1201         if (!dest_playlist) {
1202                 return 0;
1203         }
1204
1205         /* arrange to collect the new region view that will be created as a result of our playlist insertion */
1206         _new_region_view = 0;
1207         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &RegionMoveDrag::collect_new_region_view));
1208
1209         /* clear history for the playlist we are about to insert to, provided we haven't already done so */
1210         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (dest_playlist);
1211         if (r.second) {
1212                 dest_playlist->clear_changes ();
1213         }
1214
1215         dest_playlist->add_region (region, where);
1216
1217         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1218                 dest_playlist->set_layer (region, dest_layer);
1219         }
1220
1221         c.disconnect ();
1222
1223         assert (_new_region_view);
1224
1225         return _new_region_view;
1226 }
1227
1228 void
1229 RegionMoveDrag::collect_new_region_view (RegionView* rv)
1230 {
1231         _new_region_view = rv;
1232 }
1233
1234 void
1235 RegionMoveDrag::add_stateful_diff_commands_for_playlists (PlaylistSet const & playlists)
1236 {
1237         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1238                 StatefulDiffCommand* c = new StatefulDiffCommand (*i);
1239                 if (!c->empty()) {
1240                         _editor->session()->add_command (c);
1241                 } else {
1242                         delete c;
1243                 }
1244         }
1245 }
1246
1247
1248 void
1249 RegionMoveDrag::aborted (bool movement_occurred)
1250 {
1251         if (_copy) {
1252
1253                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1254                         delete i->view;
1255                 }
1256
1257                 _views.clear ();
1258
1259         } else {
1260                 RegionMotionDrag::aborted (movement_occurred);
1261         }
1262 }
1263
1264 void
1265 RegionMotionDrag::aborted (bool)
1266 {
1267         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1268                 if ((*i)->view()->layer_display() == Expanded) {
1269                         (*i)->view()->set_layer_display (Stacked);
1270                 }
1271         }
1272         
1273         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1274                 RegionView* rv = i->view;
1275                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1276                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1277                 assert (rtv);
1278                 rv->get_canvas_group()->reparent (*rtv->view()->canvas_item());
1279                 rv->get_canvas_group()->property_y() = 0;
1280                 rv->drag_end ();
1281                 rv->fake_set_opaque (false);
1282                 rv->move (-_total_x_delta, 0);
1283                 rv->set_height (rtv->view()->child_height ());
1284         }
1285
1286         _editor->update_canvas_now ();
1287 }
1288
1289 /** @param b true to brush, otherwise false.
1290  *  @param c true to make copies of the regions being moved, otherwise false.
1291  */
1292 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1293         : RegionMotionDrag (e, i, p, v, b),
1294           _copy (c)
1295 {
1296         DEBUG_TRACE (DEBUG::Drags, "New RegionMoveDrag\n");
1297
1298         double speed = 1;
1299         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&_primary->get_time_axis_view ());
1300         if (rtv && rtv->is_track()) {
1301                 speed = rtv->track()->speed ();
1302         }
1303
1304         _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
1305 }
1306
1307 void
1308 RegionMoveDrag::setup_pointer_frame_offset ()
1309 {
1310         _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
1311 }
1312
1313 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
1314         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1315 {
1316         DEBUG_TRACE (DEBUG::Drags, "New RegionInsertDrag\n");
1317
1318         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1319                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1320
1321         _primary = v->view()->create_region_view (r, false, false);
1322
1323         _primary->get_canvas_group()->show ();
1324         _primary->set_position (pos, 0);
1325         _views.push_back (DraggingView (_primary, this));
1326
1327         _last_frame_position = pos;
1328
1329         _item = _primary->get_canvas_group ();
1330 }
1331
1332 void
1333 RegionInsertDrag::finished (GdkEvent *, bool)
1334 {
1335         _editor->update_canvas_now ();
1336
1337         RouteTimeAxisView* dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[_views.front().time_axis_view]);
1338
1339         _primary->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
1340         _primary->get_canvas_group()->property_y() = 0;
1341
1342         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1343
1344         _editor->begin_reversible_command (Operations::insert_region);
1345         playlist->clear_changes ();
1346         playlist->add_region (_primary->region (), _last_frame_position);
1347         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1348         _editor->commit_reversible_command ();
1349
1350         delete _primary;
1351         _primary = 0;
1352         _views.clear ();
1353 }
1354
1355 void
1356 RegionInsertDrag::aborted (bool)
1357 {
1358         delete _primary;
1359         _primary = 0;
1360         _views.clear ();
1361 }
1362
1363 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1364         : RegionMoveDrag (e, i, p, v, false, false)
1365 {
1366         DEBUG_TRACE (DEBUG::Drags, "New RegionSpliceDrag\n");
1367 }
1368
1369 struct RegionSelectionByPosition {
1370     bool operator() (RegionView*a, RegionView* b) {
1371             return a->region()->position () < b->region()->position();
1372     }
1373 };
1374
1375 void
1376 RegionSpliceDrag::motion (GdkEvent* event, bool)
1377 {
1378         /* Which trackview is this ? */
1379
1380         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (_drags->current_pointer_y ());
1381         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1382
1383         /* The region motion is only processed if the pointer is over
1384            an audio track.
1385         */
1386
1387         if (!tv || !tv->is_track()) {
1388                 /* To make sure we hide the verbose canvas cursor when the mouse is
1389                    not held over and audiotrack.
1390                 */
1391                 _editor->verbose_cursor()->hide ();
1392                 return;
1393         }
1394
1395         int dir;
1396
1397         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1398                 dir = 1;
1399         } else {
1400                 dir = -1;
1401         }
1402
1403         RegionSelection copy (_editor->selection->regions);
1404
1405         RegionSelectionByPosition cmp;
1406         copy.sort (cmp);
1407
1408         framepos_t const pf = adjusted_current_frame (event);
1409
1410         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1411
1412                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1413
1414                 if (!atv) {
1415                         continue;
1416                 }
1417
1418                 boost::shared_ptr<Playlist> playlist;
1419
1420                 if ((playlist = atv->playlist()) == 0) {
1421                         continue;
1422                 }
1423
1424                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1425                         continue;
1426                 }
1427
1428                 if (dir > 0) {
1429                         if (pf < (*i)->region()->last_frame() + 1) {
1430                                 continue;
1431                         }
1432                 } else {
1433                         if (pf > (*i)->region()->first_frame()) {
1434                                 continue;
1435                         }
1436                 }
1437
1438
1439                 playlist->shuffle ((*i)->region(), dir);
1440         }
1441 }
1442
1443 void
1444 RegionSpliceDrag::finished (GdkEvent* event, bool movement_occurred)
1445 {
1446         RegionMoveDrag::finished (event, movement_occurred);
1447 }
1448
1449 void
1450 RegionSpliceDrag::aborted (bool)
1451 {
1452         /* XXX: TODO */
1453 }
1454
1455 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
1456         : Drag (e, i),
1457           _view (dynamic_cast<MidiTimeAxisView*> (v))
1458 {
1459         DEBUG_TRACE (DEBUG::Drags, "New RegionCreateDrag\n");
1460
1461         assert (_view);
1462 }
1463
1464 void
1465 RegionCreateDrag::motion (GdkEvent* event, bool first_move)
1466 {
1467         if (first_move) {
1468                 _region = add_midi_region (_view);
1469                 _view->playlist()->freeze ();
1470         } else {
1471                 if (_region) {
1472                         framepos_t const f = adjusted_current_frame (event);
1473                         if (f < grab_frame()) {
1474                                 _region->set_position (f);
1475                         }
1476
1477                         /* Don't use a zero-length region, and subtract 1 frame from the snapped length
1478                            so that if this region is duplicated, its duplicate starts on
1479                            a snap point rather than 1 frame after a snap point.  Otherwise things get
1480                            a bit confusing as if a region starts 1 frame after a snap point, one cannot
1481                            place snapped notes at the start of the region.
1482                         */
1483
1484                         framecnt_t const len = (framecnt_t) fabs (f - grab_frame () - 1);
1485                         _region->set_length (len < 1 ? 1 : len);
1486                 }
1487         }
1488 }
1489
1490 void
1491 RegionCreateDrag::finished (GdkEvent*, bool movement_occurred)
1492 {
1493         if (!movement_occurred) {
1494                 add_midi_region (_view);
1495         } else {
1496                 _view->playlist()->thaw ();
1497         }
1498 }
1499
1500 void
1501 RegionCreateDrag::aborted (bool)
1502 {
1503         if (_region) {
1504                 _view->playlist()->thaw ();
1505         }
1506
1507         /* XXX */
1508 }
1509
1510 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
1511         : Drag (e, i)
1512         , region (0)
1513 {
1514         DEBUG_TRACE (DEBUG::Drags, "New NoteResizeDrag\n");
1515 }
1516
1517 void
1518 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
1519 {
1520         Gdk::Cursor* cursor;
1521         ArdourCanvas::CanvasNoteEvent* cnote = dynamic_cast<ArdourCanvas::CanvasNoteEvent*>(_item);
1522         float x_fraction = cnote->mouse_x_fraction ();
1523
1524         if (x_fraction > 0.0 && x_fraction < 0.25) {
1525                 cursor = _editor->cursors()->left_side_trim;
1526         } else  {
1527                 cursor = _editor->cursors()->right_side_trim;
1528         }
1529
1530         Drag::start_grab (event, cursor);
1531
1532         region = &cnote->region_view();
1533
1534         double const region_start = region->get_position_pixels();
1535         double const middle_point = region_start + cnote->x1() + (cnote->x2() - cnote->x1()) / 2.0L;
1536
1537         if (grab_x() <= middle_point) {
1538                 cursor = _editor->cursors()->left_side_trim;
1539                 at_front = true;
1540         } else {
1541                 cursor = _editor->cursors()->right_side_trim;
1542                 at_front = false;
1543         }
1544
1545         _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, *cursor, event->motion.time);
1546
1547         if (event->motion.state & Keyboard::PrimaryModifier) {
1548                 relative = false;
1549         } else {
1550                 relative = true;
1551         }
1552
1553         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1554
1555         if (ms.size() > 1) {
1556                 /* has to be relative, may make no sense otherwise */
1557                 relative = true;
1558         }
1559
1560         /* select this note; if it is already selected, preserve the existing selection,
1561            otherwise make this note the only one selected.
1562         */
1563         region->note_selected (cnote, cnote->selected ());
1564
1565         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
1566                 MidiRegionSelection::iterator next;
1567                 next = r;
1568                 ++next;
1569                 (*r)->begin_resizing (at_front);
1570                 r = next;
1571         }
1572 }
1573
1574 void
1575 NoteResizeDrag::motion (GdkEvent* /*event*/, bool /*first_move*/)
1576 {
1577         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1578         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1579                 (*r)->update_resizing (dynamic_cast<ArdourCanvas::CanvasNoteEvent*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1580         }
1581 }
1582
1583 void
1584 NoteResizeDrag::finished (GdkEvent*, bool /*movement_occurred*/)
1585 {
1586         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1587         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1588                 (*r)->commit_resizing (dynamic_cast<ArdourCanvas::CanvasNoteEvent*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1589         }
1590 }
1591
1592 void
1593 NoteResizeDrag::aborted (bool)
1594 {
1595         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1596         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1597                 (*r)->abort_resizing ();
1598         }
1599 }
1600
1601 AVDraggingView::AVDraggingView (RegionView* v)
1602         : view (v)
1603 {
1604         initial_position = v->region()->position ();
1605 }
1606
1607 VideoTimeLineDrag::VideoTimeLineDrag (Editor* e, ArdourCanvas::Item* i)
1608         : Drag (e, i)
1609 {
1610         DEBUG_TRACE (DEBUG::Drags, "New VideoTimeLineDrag\n");
1611
1612         RegionSelection rs;
1613         TrackViewList empty;
1614         empty.clear();
1615         _editor->get_regions_after(rs, (framepos_t) 0, empty);
1616         std::list<RegionView*> views = rs.by_layer();
1617
1618         for (list<RegionView*>::iterator i = views.begin(); i != views.end(); ++i) {
1619                 RegionView* rv = (*i);
1620                 if (!rv->region()->video_locked()) {
1621                         continue;
1622                 }
1623                 _views.push_back (AVDraggingView (rv));
1624         }
1625 }
1626
1627 void
1628 VideoTimeLineDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
1629 {
1630         Drag::start_grab (event);
1631         if (_editor->session() == 0) {
1632                 return;
1633         }
1634
1635         _startdrag_video_offset=ARDOUR_UI::instance()->video_timeline->get_offset();
1636         _max_backwards_drag = (
1637                           ARDOUR_UI::instance()->video_timeline->get_duration()
1638                         + ARDOUR_UI::instance()->video_timeline->get_offset()
1639                         - ceil(ARDOUR_UI::instance()->video_timeline->get_apv())
1640                         );
1641
1642         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1643                 if (i->initial_position < _max_backwards_drag || _max_backwards_drag < 0) {
1644                         _max_backwards_drag = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv (i->initial_position);
1645                 }
1646         }
1647         DEBUG_TRACE (DEBUG::Drags, string_compose("VideoTimeLineDrag: max backwards-drag: %1\n", _max_backwards_drag));
1648
1649         char buf[128];
1650         Timecode::Time timecode;
1651         _editor->session()->sample_to_timecode(abs(_startdrag_video_offset), timecode, true /* use_offset */, false /* use_subframes */ );
1652         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);
1653         _editor->verbose_cursor()->set(buf, event->button.x + 10, event->button.y + 10);
1654         _editor->verbose_cursor()->show ();
1655 }
1656
1657 void
1658 VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
1659 {
1660         if (_editor->session() == 0) {
1661                 return;
1662         }
1663         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
1664                 return;
1665         }
1666
1667         framecnt_t dt = adjusted_current_frame (event) - raw_grab_frame() + _pointer_frame_offset;
1668         dt = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv(dt);
1669
1670         if (_max_backwards_drag >= 0 && dt <= - _max_backwards_drag) {
1671                 dt = - _max_backwards_drag;
1672         }
1673
1674         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset+dt);
1675         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
1676
1677         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1678                 RegionView* rv = i->view;
1679                 DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
1680                 if (first_move) {
1681                         rv->drag_start ();
1682                         _editor->update_canvas_now ();
1683                         rv->fake_set_opaque (true);
1684                         rv->region()->clear_changes ();
1685                         rv->region()->suspend_property_changes();
1686                 }
1687                 rv->region()->set_position(i->initial_position + dt);
1688                 rv->region_changed(ARDOUR::Properties::position);
1689         }
1690
1691         const framepos_t offset = ARDOUR_UI::instance()->video_timeline->get_offset();
1692         Timecode::Time timecode;
1693         Timecode::Time timediff;
1694         char buf[128];
1695         _editor->session()->sample_to_timecode(abs(offset), timecode, true /* use_offset */, false /* use_subframes */ );
1696         _editor->session()->sample_to_timecode(abs(dt), timediff, false /* use_offset */, false /* use_subframes */ );
1697         snprintf (buf, sizeof (buf),
1698                         "%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
1699                         "\n%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
1700                         , _("Video Start:"),
1701                                 (offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames
1702                         , _("Diff:"),
1703                                 (dt<0?'-':' '), timediff.hours, timediff.minutes, timediff.seconds, timediff.frames
1704                                 );
1705         _editor->verbose_cursor()->set(buf, event->button.x + 10, event->button.y + 10);
1706         _editor->verbose_cursor()->show ();
1707 }
1708
1709 void
1710 VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
1711 {
1712         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
1713                 return;
1714         }
1715
1716         if (!movement_occurred || ! _editor->session()) {
1717                 return;
1718         }
1719
1720         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
1721
1722         _editor->begin_reversible_command (_("Move Video"));
1723
1724         XMLNode &before = ARDOUR_UI::instance()->video_timeline->get_state();
1725         ARDOUR_UI::instance()->video_timeline->save_undo();
1726         XMLNode &after = ARDOUR_UI::instance()->video_timeline->get_state();
1727         _editor->session()->add_command(new MementoCommand<VideoTimeLine>(*(ARDOUR_UI::instance()->video_timeline), &before, &after));
1728
1729         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1730                 i->view->drag_end();
1731                 i->view->fake_set_opaque (false);
1732                 i->view->region()->resume_property_changes ();
1733
1734                 _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
1735         }
1736
1737         _editor->session()->maybe_update_session_range(
1738                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset(), (ARDOUR::frameoffset_t) 0),
1739                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset() + ARDOUR_UI::instance()->video_timeline->get_duration(), (ARDOUR::frameoffset_t) 0)
1740                         );
1741
1742
1743         _editor->commit_reversible_command ();
1744         _editor->update_canvas_now ();
1745 }
1746
1747 void
1748 VideoTimeLineDrag::aborted (bool)
1749 {
1750         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
1751                 return;
1752         }
1753         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset);
1754         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
1755
1756         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1757                 i->view->region()->resume_property_changes ();
1758                 i->view->region()->set_position(i->initial_position);
1759         }
1760 }
1761
1762 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool preserve_fade_anchor)
1763         : RegionDrag (e, i, p, v)
1764 {
1765         DEBUG_TRACE (DEBUG::Drags, "New TrimDrag\n");
1766         _preserve_fade_anchor = preserve_fade_anchor;
1767 }
1768
1769 void
1770 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
1771 {
1772         double speed = 1.0;
1773         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1774         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1775
1776         if (tv && tv->is_track()) {
1777                 speed = tv->track()->speed();
1778         }
1779
1780         framepos_t const region_start = (framepos_t) (_primary->region()->position() / speed);
1781         framepos_t const region_end = (framepos_t) (_primary->region()->last_frame() / speed);
1782         framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
1783
1784         framepos_t const pf = adjusted_current_frame (event);
1785
1786         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1787                 /* Move the contents of the region around without changing the region bounds */
1788                 _operation = ContentsTrim;
1789                 Drag::start_grab (event, _editor->cursors()->trimmer);
1790         } else {
1791                 /* These will get overridden for a point trim.*/
1792                 if (pf < (region_start + region_length/2)) {
1793                         /* closer to front */
1794                         _operation = StartTrim;
1795                         Drag::start_grab (event, _editor->cursors()->left_side_trim);
1796                 } else {
1797                         /* closer to end */
1798                         _operation = EndTrim;
1799                         Drag::start_grab (event, _editor->cursors()->right_side_trim);
1800                 }
1801         }
1802
1803         switch (_operation) {
1804         case StartTrim:
1805                 show_verbose_cursor_time (region_start);
1806                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1807                         i->view->trim_front_starting ();
1808                 }
1809                 break;
1810         case EndTrim:
1811                 show_verbose_cursor_time (region_end);
1812                 break;
1813         case ContentsTrim:
1814                 show_verbose_cursor_time (pf);
1815                 break;
1816         }
1817
1818         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1819                 i->view->region()->suspend_property_changes ();
1820         }
1821 }
1822
1823 void
1824 TrimDrag::motion (GdkEvent* event, bool first_move)
1825 {
1826         RegionView* rv = _primary;
1827
1828         double speed = 1.0;
1829         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1830         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1831         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
1832
1833         if (tv && tv->is_track()) {
1834                 speed = tv->track()->speed();
1835         }
1836
1837         framecnt_t const dt = adjusted_current_frame (event) - raw_grab_frame () + _pointer_frame_offset;
1838
1839         if (first_move) {
1840
1841                 string trim_type;
1842
1843                 switch (_operation) {
1844                 case StartTrim:
1845                         trim_type = "Region start trim";
1846                         break;
1847                 case EndTrim:
1848                         trim_type = "Region end trim";
1849                         break;
1850                 case ContentsTrim:
1851                         trim_type = "Region content trim";
1852                         break;
1853                 }
1854
1855                 _editor->begin_reversible_command (trim_type);
1856
1857                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1858                         RegionView* rv = i->view;
1859                         rv->fake_set_opaque (false);
1860                         rv->enable_display (false);
1861                         rv->region()->playlist()->clear_owned_changes ();
1862
1863                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
1864
1865                         if (arv) {
1866                                 arv->temporarily_hide_envelope ();
1867                                 arv->drag_start ();
1868                         }
1869
1870                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
1871                         insert_result = _editor->motion_frozen_playlists.insert (pl);
1872
1873                         if (insert_result.second) {
1874                                 pl->freeze();
1875                         }
1876                 }
1877         }
1878
1879         bool non_overlap_trim = false;
1880
1881         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
1882                 non_overlap_trim = true;
1883         }
1884
1885         switch (_operation) {
1886         case StartTrim:
1887                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1888                         bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim);
1889                         if (changed && _preserve_fade_anchor) {
1890                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
1891                                 if (arv) {
1892                                         double distance;
1893                                         double new_length;
1894                                         framecnt_t len;
1895                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
1896                                         distance = _drags->current_pointer_x() - grab_x();
1897                                         len = ar->fade_in()->back()->when;
1898                                         new_length = len - _editor->unit_to_frame (distance);
1899                                         new_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
1900                                         arv->reset_fade_in_shape_width (ar, new_length);  //the grey shape
1901                                 }
1902                         }
1903                 }
1904                 break;
1905
1906         case EndTrim:
1907                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1908                         bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim);
1909                         if (changed && _preserve_fade_anchor) {
1910                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
1911                                 if (arv) {
1912                                         double distance;
1913                                         double new_length;
1914                                         framecnt_t len;
1915                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
1916                                         distance = grab_x() - _drags->current_pointer_x();
1917                                         len = ar->fade_out()->back()->when;
1918                                         new_length = len - _editor->unit_to_frame (distance);
1919                                         new_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
1920                                         arv->reset_fade_out_shape_width (ar, new_length);  //the grey shape
1921                                 }
1922                         }
1923                 }
1924                 break;
1925
1926         case ContentsTrim:
1927                 {
1928                         bool swap_direction = false;
1929
1930                         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1931                                 swap_direction = true;
1932                         }
1933
1934                         framecnt_t frame_delta = 0;
1935
1936                         bool left_direction = false;
1937                         if (last_pointer_frame() > adjusted_current_frame(event)) {
1938                                 left_direction = true;
1939                         }
1940
1941                         if (left_direction) {
1942                                 frame_delta = (last_pointer_frame() - adjusted_current_frame(event));
1943                         } else {
1944                                 frame_delta = (adjusted_current_frame(event) - last_pointer_frame());
1945                         }
1946
1947                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1948                                 i->view->trim_contents (frame_delta, left_direction, swap_direction);
1949                         }
1950                 }
1951                 break;
1952         }
1953
1954         switch (_operation) {
1955         case StartTrim:
1956                 show_verbose_cursor_time ((framepos_t) (rv->region()->position() / speed));
1957                 break;
1958         case EndTrim:
1959                 show_verbose_cursor_time ((framepos_t) (rv->region()->last_frame() / speed));
1960                 break;
1961         case ContentsTrim:
1962                 show_verbose_cursor_time (adjusted_current_frame (event));
1963                 break;
1964         }
1965 }
1966
1967
1968 void
1969 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
1970 {
1971         if (movement_occurred) {
1972                 motion (event, false);
1973
1974                 if (_operation == StartTrim) {
1975                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1976                                 {
1977                                         /* This must happen before the region's StatefulDiffCommand is created, as it may
1978                                            `correct' (ahem) the region's _start from being negative to being zero.  It
1979                                            needs to be zero in the undo record.
1980                                         */
1981                                         i->view->trim_front_ending ();
1982                                 }
1983                                 if (_preserve_fade_anchor) {
1984                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
1985                                         if (arv) {
1986                                                 double distance;
1987                                                 double new_length;
1988                                                 framecnt_t len;
1989                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
1990                                                 distance = _drags->current_pointer_x() - grab_x();
1991                                                 len = ar->fade_in()->back()->when;
1992                                                 new_length = len - _editor->unit_to_frame (distance);
1993                                                 new_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
1994                                                 ar->set_fade_in_length(new_length);
1995                                         }
1996                                 }
1997                         }
1998                 } else if (_operation == EndTrim) {
1999                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2000                                 if (_preserve_fade_anchor) {
2001                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2002                                         if (arv) {
2003                                                 double distance;
2004                                                 double new_length;
2005                                                 framecnt_t len;
2006                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2007                                                 distance = _drags->current_pointer_x() - grab_x();
2008                                                 len = ar->fade_out()->back()->when;
2009                                                 new_length = len - _editor->unit_to_frame (distance);
2010                                                 new_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
2011                                                 ar->set_fade_out_length(new_length);
2012                                         }
2013                                 }
2014                         }
2015                 }
2016
2017                 if (!_views.empty()) {
2018                         if (_operation == StartTrim) {
2019                                 _editor->maybe_locate_with_edit_preroll(
2020                                         _views.begin()->view->region()->position());
2021                         }
2022                         if (_operation == EndTrim) {
2023                                 _editor->maybe_locate_with_edit_preroll(
2024                                         _views.begin()->view->region()->position() +
2025                                         _views.begin()->view->region()->length());
2026                         }
2027                 }
2028         
2029                 if (!_editor->selection->selected (_primary)) {
2030                         _primary->thaw_after_trim ();
2031                 } else {
2032
2033                         set<boost::shared_ptr<Playlist> > diffed_playlists;
2034
2035                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2036                                 i->view->thaw_after_trim ();
2037                                 i->view->enable_display (true);
2038                                 i->view->fake_set_opaque (true);
2039
2040                                 /* Trimming one region may affect others on the playlist, so we need
2041                                    to get undo Commands from the whole playlist rather than just the
2042                                    region.  Use diffed_playlists to make sure we don't diff a given
2043                                    playlist more than once.
2044                                 */
2045                                 boost::shared_ptr<Playlist> p = i->view->region()->playlist ();
2046                                 if (diffed_playlists.find (p) == diffed_playlists.end()) {
2047                                         vector<Command*> cmds;
2048                                         p->rdiff (cmds);
2049                                         _editor->session()->add_commands (cmds);
2050                                         diffed_playlists.insert (p);
2051                                 }
2052                         }
2053                 }
2054
2055                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
2056                         (*p)->thaw ();
2057                 }
2058
2059                 _editor->motion_frozen_playlists.clear ();
2060                 _editor->commit_reversible_command();
2061
2062         } else {
2063                 /* no mouse movement */
2064                 _editor->point_trim (event, adjusted_current_frame (event));
2065         }
2066
2067         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2068                 if (_operation == StartTrim) {
2069                         i->view->trim_front_ending ();
2070                 }
2071
2072                 i->view->region()->resume_property_changes ();
2073         }
2074 }
2075
2076 void
2077 TrimDrag::aborted (bool movement_occurred)
2078 {
2079         /* Our motion method is changing model state, so use the Undo system
2080            to cancel.  Perhaps not ideal, as this will leave an Undo point
2081            behind which may be slightly odd from the user's point of view.
2082         */
2083
2084         finished (0, true);
2085
2086         if (movement_occurred) {
2087                 _editor->undo ();
2088         }
2089
2090         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2091                 i->view->region()->resume_property_changes ();
2092         }
2093 }
2094
2095 void
2096 TrimDrag::setup_pointer_frame_offset ()
2097 {
2098         list<DraggingView>::iterator i = _views.begin ();
2099         while (i != _views.end() && i->view != _primary) {
2100                 ++i;
2101         }
2102
2103         if (i == _views.end()) {
2104                 return;
2105         }
2106
2107         switch (_operation) {
2108         case StartTrim:
2109                 _pointer_frame_offset = raw_grab_frame() - i->initial_position;
2110                 break;
2111         case EndTrim:
2112                 _pointer_frame_offset = raw_grab_frame() - i->initial_end;
2113                 break;
2114         case ContentsTrim:
2115                 break;
2116         }
2117 }
2118
2119 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
2120         : Drag (e, i),
2121           _copy (c)
2122 {
2123         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
2124         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
2125         assert (_marker);
2126 }
2127
2128 void
2129 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2130 {
2131         Drag::start_grab (event, cursor);
2132         show_verbose_cursor_time (adjusted_current_frame(event));
2133 }
2134
2135 void
2136 MeterMarkerDrag::setup_pointer_frame_offset ()
2137 {
2138         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
2139 }
2140
2141 void
2142 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
2143 {
2144         if (first_move) {
2145
2146                 // create a dummy marker for visual representation of moving the
2147                 // section, because whether its a copy or not, we're going to 
2148                 // leave or lose the original marker (leave if its a copy; lose if its
2149                 // not, because we'll remove it from the map).
2150                 
2151                 MeterSection section (_marker->meter());
2152
2153                 if (!section.movable()) {
2154                         return;
2155                 }
2156                 
2157                 char name[64];
2158                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
2159                 
2160                 _marker = new MeterMarker (
2161                         *_editor,
2162                         *_editor->meter_group,
2163                         ARDOUR_UI::config()->canvasvar_MeterMarker.get(),
2164                         name,
2165                         *new MeterSection (_marker->meter())
2166                 );
2167                 
2168                 /* use the new marker for the grab */
2169                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
2170
2171                 if (!_copy) {
2172                         TempoMap& map (_editor->session()->tempo_map());
2173                         /* get current state */
2174                         before_state = &map.get_state();
2175                         /* remove the section while we drag it */
2176                         map.remove_meter (section, true);
2177                 }
2178         }
2179
2180         framepos_t const pf = adjusted_current_frame (event);
2181         _marker->set_position (pf);
2182         show_verbose_cursor_time (pf);
2183 }
2184
2185 void
2186 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2187 {
2188         if (!movement_occurred) {
2189                 return;
2190         }
2191
2192         motion (event, false);
2193
2194         Timecode::BBT_Time when;
2195
2196         TempoMap& map (_editor->session()->tempo_map());
2197         map.bbt_time (last_pointer_frame(), when);
2198         
2199         if (_copy == true) {
2200                 _editor->begin_reversible_command (_("copy meter mark"));
2201                 XMLNode &before = map.get_state();
2202                 map.add_meter (_marker->meter(), when);
2203                 XMLNode &after = map.get_state();
2204                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
2205                 _editor->commit_reversible_command ();
2206
2207         } else {
2208                 _editor->begin_reversible_command (_("move meter mark"));
2209
2210                 /* we removed it before, so add it back now */
2211                 
2212                 map.add_meter (_marker->meter(), when);
2213                 XMLNode &after = map.get_state();
2214                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
2215                 _editor->commit_reversible_command ();
2216         }
2217
2218         // delete the dummy marker we used for visual representation while moving.
2219         // a new visual marker will show up automatically.
2220         delete _marker;
2221 }
2222
2223 void
2224 MeterMarkerDrag::aborted (bool moved)
2225 {
2226         _marker->set_position (_marker->meter().frame ());
2227
2228         if (moved) {
2229                 TempoMap& map (_editor->session()->tempo_map());
2230                 /* we removed it before, so add it back now */
2231                 map.add_meter (_marker->meter(), _marker->meter().frame());
2232                 // delete the dummy marker we used for visual representation while moving.
2233                 // a new visual marker will show up automatically.
2234                 delete _marker;
2235         }
2236 }
2237
2238 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
2239         : Drag (e, i),
2240           _copy (c)
2241 {
2242         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
2243
2244         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
2245         assert (_marker);
2246 }
2247
2248 void
2249 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2250 {
2251         Drag::start_grab (event, cursor);
2252         show_verbose_cursor_time (adjusted_current_frame (event));
2253 }
2254
2255 void
2256 TempoMarkerDrag::setup_pointer_frame_offset ()
2257 {
2258         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
2259 }
2260
2261 void
2262 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
2263 {
2264         if (first_move) {
2265
2266                 // create a dummy marker for visual representation of moving the
2267                 // section, because whether its a copy or not, we're going to 
2268                 // leave or lose the original marker (leave if its a copy; lose if its
2269                 // not, because we'll remove it from the map).
2270                 
2271                 // create a dummy marker for visual representation of moving the copy.
2272                 // The actual copying is not done before we reach the finish callback.
2273
2274                 char name[64];
2275                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
2276
2277                 TempoSection section (_marker->tempo());
2278
2279                 _marker = new TempoMarker (
2280                         *_editor,
2281                         *_editor->tempo_group,
2282                         ARDOUR_UI::config()->canvasvar_TempoMarker.get(),
2283                         name,
2284                         *new TempoSection (_marker->tempo())
2285                         );
2286
2287                 /* use the new marker for the grab */
2288                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
2289
2290                 if (!_copy) {
2291                         TempoMap& map (_editor->session()->tempo_map());
2292                         /* get current state */
2293                         before_state = &map.get_state();
2294                         /* remove the section while we drag it */
2295                         map.remove_tempo (section, true);
2296                 }
2297         }
2298
2299         framepos_t const pf = adjusted_current_frame (event);
2300         _marker->set_position (pf);
2301         show_verbose_cursor_time (pf);
2302 }
2303
2304 void
2305 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2306 {
2307         if (!movement_occurred) {
2308                 return;
2309         }
2310
2311         motion (event, false);
2312
2313         TempoMap& map (_editor->session()->tempo_map());
2314         framepos_t beat_time = map.round_to_beat (last_pointer_frame(), 0);
2315         Timecode::BBT_Time when;
2316
2317         map.bbt_time (beat_time, when);
2318
2319         if (_copy == true) {
2320                 _editor->begin_reversible_command (_("copy tempo mark"));
2321                 XMLNode &before = map.get_state();
2322                 map.add_tempo (_marker->tempo(), when);
2323                 XMLNode &after = map.get_state();
2324                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
2325                 _editor->commit_reversible_command ();
2326
2327         } else {
2328                 _editor->begin_reversible_command (_("move tempo mark"));
2329                 /* we removed it before, so add it back now */
2330                 map.add_tempo (_marker->tempo(), when);
2331                 XMLNode &after = map.get_state();
2332                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
2333                 _editor->commit_reversible_command ();
2334         }
2335
2336         // delete the dummy marker we used for visual representation while moving.
2337         // a new visual marker will show up automatically.
2338         delete _marker;
2339 }
2340
2341 void
2342 TempoMarkerDrag::aborted (bool moved)
2343 {
2344         _marker->set_position (_marker->tempo().frame());
2345         if (moved) {
2346                 TempoMap& map (_editor->session()->tempo_map());
2347                 /* we removed it before, so add it back now */
2348                 map.add_tempo (_marker->tempo(), _marker->tempo().start());
2349                 // delete the dummy marker we used for visual representation while moving.
2350                 // a new visual marker will show up automatically.
2351                 delete _marker;
2352         }
2353 }
2354
2355 CursorDrag::CursorDrag (Editor* e, ArdourCanvas::Item* i, bool s)
2356         : Drag (e, i),
2357           _stop (s)
2358 {
2359         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
2360 }
2361
2362 /** Do all the things we do when dragging the playhead to make it look as though
2363  *  we have located, without actually doing the locate (because that would cause
2364  *  the diskstream buffers to be refilled, which is too slow).
2365  */
2366 void
2367 CursorDrag::fake_locate (framepos_t t)
2368 {
2369         _editor->playhead_cursor->set_position (t);
2370
2371         Session* s = _editor->session ();
2372         if (s->timecode_transmission_suspended ()) {
2373                 framepos_t const f = _editor->playhead_cursor->current_frame;
2374                 s->send_mmc_locate (f);
2375                 s->send_full_time_code (f);
2376         }
2377
2378         show_verbose_cursor_time (t);
2379         _editor->UpdateAllTransportClocks (t);
2380 }
2381
2382 void
2383 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
2384 {
2385         Drag::start_grab (event, c);
2386
2387         _grab_zoom = _editor->frames_per_unit;
2388
2389         framepos_t where = _editor->event_frame (event, 0, 0);
2390         _editor->snap_to_with_modifier (where, event);
2391
2392         _editor->_dragging_playhead = true;
2393
2394         Session* s = _editor->session ();
2395
2396         if (s) {
2397                 if (_was_rolling && _stop) {
2398                         s->request_stop ();
2399                 }
2400
2401                 if (s->is_auditioning()) {
2402                         s->cancel_audition ();
2403                 }
2404
2405
2406                 if (AudioEngine::instance()->connected()) {
2407                         
2408                         /* do this only if we're the engine is connected
2409                          * because otherwise this request will never be
2410                          * serviced and we'll busy wait forever. likewise,
2411                          * notice if we are disconnected while waiting for the
2412                          * request to be serviced.
2413                          */
2414
2415                         s->request_suspend_timecode_transmission ();
2416                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
2417                                 /* twiddle our thumbs */
2418                         }
2419                 }
2420         }
2421
2422         fake_locate (where);
2423 }
2424
2425 void
2426 CursorDrag::motion (GdkEvent* event, bool)
2427 {
2428         framepos_t const adjusted_frame = adjusted_current_frame (event);
2429         if (adjusted_frame != last_pointer_frame()) {
2430                 fake_locate (adjusted_frame);
2431 #ifdef GTKOSX
2432                 _editor->update_canvas_now ();
2433 #endif
2434         }
2435 }
2436
2437 void
2438 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
2439 {
2440         _editor->_dragging_playhead = false;
2441
2442         if (!movement_occurred && _stop) {
2443                 return;
2444         }
2445
2446         motion (event, false);
2447
2448         Session* s = _editor->session ();
2449         if (s) {
2450                 s->request_locate (_editor->playhead_cursor->current_frame, _was_rolling);
2451                 _editor->_pending_locate_request = true;
2452                 s->request_resume_timecode_transmission ();
2453         }
2454 }
2455
2456 void
2457 CursorDrag::aborted (bool)
2458 {
2459         if (_editor->_dragging_playhead) {
2460                 _editor->session()->request_resume_timecode_transmission ();
2461                 _editor->_dragging_playhead = false;
2462         }
2463
2464         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
2465 }
2466
2467 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2468         : RegionDrag (e, i, p, v)
2469 {
2470         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
2471 }
2472
2473 void
2474 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2475 {
2476         Drag::start_grab (event, cursor);
2477
2478         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2479         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
2480
2481         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
2482 }
2483
2484 void
2485 FadeInDrag::setup_pointer_frame_offset ()
2486 {
2487         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2488         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
2489         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
2490 }
2491
2492 void
2493 FadeInDrag::motion (GdkEvent* event, bool)
2494 {
2495         framecnt_t fade_length;
2496
2497         framepos_t const pos = adjusted_current_frame (event);
2498
2499         boost::shared_ptr<Region> region = _primary->region ();
2500
2501         if (pos < (region->position() + 64)) {
2502                 fade_length = 64; // this should be a minimum defined somewhere
2503         } else if (pos > region->last_frame()) {
2504                 fade_length = region->length();
2505         } else {
2506                 fade_length = pos - region->position();
2507         }
2508
2509         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2510
2511                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2512
2513                 if (!tmp) {
2514                         continue;
2515                 }
2516
2517                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
2518         }
2519
2520         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
2521 }
2522
2523 void
2524 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
2525 {
2526         if (!movement_occurred) {
2527                 return;
2528         }
2529
2530         framecnt_t fade_length;
2531
2532         framepos_t const pos = adjusted_current_frame (event);
2533
2534         boost::shared_ptr<Region> region = _primary->region ();
2535
2536         if (pos < (region->position() + 64)) {
2537                 fade_length = 64; // this should be a minimum defined somewhere
2538         } else if (pos > region->last_frame()) {
2539                 fade_length = region->length();
2540         } else {
2541                 fade_length = pos - region->position();
2542         }
2543
2544         _editor->begin_reversible_command (_("change fade in length"));
2545
2546         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2547
2548                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2549
2550                 if (!tmp) {
2551                         continue;
2552                 }
2553
2554                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
2555                 XMLNode &before = alist->get_state();
2556
2557                 tmp->audio_region()->set_fade_in_length (fade_length);
2558                 tmp->audio_region()->set_fade_in_active (true);
2559
2560                 XMLNode &after = alist->get_state();
2561                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2562         }
2563
2564         _editor->commit_reversible_command ();
2565 }
2566
2567 void
2568 FadeInDrag::aborted (bool)
2569 {
2570         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2571                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2572
2573                 if (!tmp) {
2574                         continue;
2575                 }
2576
2577                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
2578         }
2579 }
2580
2581 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2582         : RegionDrag (e, i, p, v)
2583 {
2584         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
2585 }
2586
2587 void
2588 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2589 {
2590         Drag::start_grab (event, cursor);
2591
2592         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2593         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
2594
2595         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
2596 }
2597
2598 void
2599 FadeOutDrag::setup_pointer_frame_offset ()
2600 {
2601         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2602         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
2603         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
2604 }
2605
2606 void
2607 FadeOutDrag::motion (GdkEvent* event, bool)
2608 {
2609         framecnt_t fade_length;
2610
2611         framepos_t const pos = adjusted_current_frame (event);
2612
2613         boost::shared_ptr<Region> region = _primary->region ();
2614
2615         if (pos > (region->last_frame() - 64)) {
2616                 fade_length = 64; // this should really be a minimum fade defined somewhere
2617         }
2618         else if (pos < region->position()) {
2619                 fade_length = region->length();
2620         }
2621         else {
2622                 fade_length = region->last_frame() - pos;
2623         }
2624
2625         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2626
2627                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2628
2629                 if (!tmp) {
2630                         continue;
2631                 }
2632
2633                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
2634         }
2635
2636         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
2637 }
2638
2639 void
2640 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
2641 {
2642         if (!movement_occurred) {
2643                 return;
2644         }
2645
2646         framecnt_t fade_length;
2647
2648         framepos_t const pos = adjusted_current_frame (event);
2649
2650         boost::shared_ptr<Region> region = _primary->region ();
2651
2652         if (pos > (region->last_frame() - 64)) {
2653                 fade_length = 64; // this should really be a minimum fade defined somewhere
2654         }
2655         else if (pos < region->position()) {
2656                 fade_length = region->length();
2657         }
2658         else {
2659                 fade_length = region->last_frame() - pos;
2660         }
2661
2662         _editor->begin_reversible_command (_("change fade out length"));
2663
2664         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2665
2666                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2667
2668                 if (!tmp) {
2669                         continue;
2670                 }
2671
2672                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
2673                 XMLNode &before = alist->get_state();
2674
2675                 tmp->audio_region()->set_fade_out_length (fade_length);
2676                 tmp->audio_region()->set_fade_out_active (true);
2677
2678                 XMLNode &after = alist->get_state();
2679                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2680         }
2681
2682         _editor->commit_reversible_command ();
2683 }
2684
2685 void
2686 FadeOutDrag::aborted (bool)
2687 {
2688         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2689                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2690
2691                 if (!tmp) {
2692                         continue;
2693                 }
2694
2695                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
2696         }
2697 }
2698
2699 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
2700         : Drag (e, i)
2701 {
2702         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
2703
2704         _marker = reinterpret_cast<Marker*> (_item->get_data ("marker"));
2705         assert (_marker);
2706
2707         _points.push_back (Gnome::Art::Point (0, 0));
2708         _points.push_back (Gnome::Art::Point (0, physical_screen_height (_editor->get_window())));
2709 }
2710
2711 MarkerDrag::~MarkerDrag ()
2712 {
2713         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
2714                 delete i->location;
2715         }
2716 }
2717
2718 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, Marker* m)
2719 {
2720         location = new Location (*l);
2721         markers.push_back (m);
2722         move_both = false;
2723 }
2724
2725 void
2726 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2727 {
2728         Drag::start_grab (event, cursor);
2729
2730         bool is_start;
2731
2732         Location *location = _editor->find_location_from_marker (_marker, is_start);
2733         _editor->_dragging_edit_point = true;
2734
2735         update_item (location);
2736
2737         // _drag_line->show();
2738         // _line->raise_to_top();
2739
2740         if (is_start) {
2741                 show_verbose_cursor_time (location->start());
2742         } else {
2743                 show_verbose_cursor_time (location->end());
2744         }
2745
2746         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2747
2748         switch (op) {
2749         case Selection::Toggle:
2750                 /* we toggle on the button release */
2751                 break;
2752         case Selection::Set:
2753                 if (!_editor->selection->selected (_marker)) {
2754                         _editor->selection->set (_marker);
2755                 }
2756                 break;
2757         case Selection::Extend:
2758         {
2759                 Locations::LocationList ll;
2760                 list<Marker*> to_add;
2761                 framepos_t s, e;
2762                 _editor->selection->markers.range (s, e);
2763                 s = min (_marker->position(), s);
2764                 e = max (_marker->position(), e);
2765                 s = min (s, e);
2766                 e = max (s, e);
2767                 if (e < max_framepos) {
2768                         ++e;
2769                 }
2770                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
2771                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
2772                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
2773                         if (lm) {
2774                                 if (lm->start) {
2775                                         to_add.push_back (lm->start);
2776                                 }
2777                                 if (lm->end) {
2778                                         to_add.push_back (lm->end);
2779                                 }
2780                         }
2781                 }
2782                 if (!to_add.empty()) {
2783                         _editor->selection->add (to_add);
2784                 }
2785                 break;
2786         }
2787         case Selection::Add:
2788                 _editor->selection->add (_marker);
2789                 break;
2790         }
2791
2792         /* Set up copies for us to manipulate during the drag 
2793          */
2794
2795         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
2796
2797                 Location* l = _editor->find_location_from_marker (*i, is_start);
2798
2799                 if (!l) {
2800                         continue;
2801                 }
2802
2803                 if (l->is_mark()) {
2804                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
2805                 } else {
2806                         /* range: check that the other end of the range isn't
2807                            already there.
2808                         */
2809                         CopiedLocationInfo::iterator x;
2810                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2811                                 if (*(*x).location == *l) {
2812                                         break;
2813                                 }
2814                         }
2815                         if (x == _copied_locations.end()) {
2816                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
2817                         } else {
2818                                 (*x).markers.push_back (*i);
2819                                 (*x).move_both = true;
2820                         }
2821                 }
2822                         
2823         }
2824 }
2825
2826 void
2827 MarkerDrag::setup_pointer_frame_offset ()
2828 {
2829         bool is_start;
2830         Location *location = _editor->find_location_from_marker (_marker, is_start);
2831         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
2832 }
2833
2834 void
2835 MarkerDrag::motion (GdkEvent* event, bool)
2836 {
2837         framecnt_t f_delta = 0;
2838         bool is_start;
2839         bool move_both = false;
2840         Location *real_location;
2841         Location *copy_location = 0;
2842
2843         framepos_t const newframe = adjusted_current_frame (event);
2844         framepos_t next = newframe;
2845
2846         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
2847                 move_both = true;
2848         }
2849
2850         CopiedLocationInfo::iterator x;
2851
2852         /* find the marker we're dragging, and compute the delta */
2853
2854         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2855
2856                 copy_location = (*x).location;
2857
2858                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
2859
2860                         /* this marker is represented by this
2861                          * CopiedLocationMarkerInfo 
2862                          */
2863
2864                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
2865                                 /* que pasa ?? */
2866                                 return;
2867                         }
2868
2869                         if (real_location->is_mark()) {
2870                                 f_delta = newframe - copy_location->start();
2871                         } else {
2872
2873
2874                                 switch (_marker->type()) {
2875                                 case Marker::SessionStart:
2876                                 case Marker::RangeStart:
2877                                 case Marker::LoopStart:
2878                                 case Marker::PunchIn:
2879                                         f_delta = newframe - copy_location->start();
2880                                         break;
2881
2882                                 case Marker::SessionEnd:
2883                                 case Marker::RangeEnd:
2884                                 case Marker::LoopEnd:
2885                                 case Marker::PunchOut:
2886                                         f_delta = newframe - copy_location->end();
2887                                         break;
2888                                 default:
2889                                         /* what kind of marker is this ? */
2890                                         return;
2891                                 }
2892                         }
2893
2894                         break;
2895                 }
2896         }
2897
2898         if (x == _copied_locations.end()) {
2899                 /* hmm, impossible - we didn't find the dragged marker */
2900                 return;
2901         }
2902
2903         /* now move them all */
2904
2905         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2906
2907                 copy_location = x->location;
2908
2909                 /* call this to find out if its the start or end */
2910
2911                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
2912                         continue;
2913                 }
2914
2915                 if (real_location->locked()) {
2916                         continue;
2917                 }
2918
2919                 if (copy_location->is_mark()) {
2920
2921                         /* now move it */
2922
2923                         copy_location->set_start (copy_location->start() + f_delta);
2924
2925                 } else {
2926                         
2927                         framepos_t new_start = copy_location->start() + f_delta;
2928                         framepos_t new_end = copy_location->end() + f_delta;
2929                         
2930                         if (is_start) { // start-of-range marker
2931                                 
2932                                 if (move_both || (*x).move_both) {
2933                                         copy_location->set_start (new_start);
2934                                         copy_location->set_end (new_end);
2935                                 } else  if (new_start < copy_location->end()) {
2936                                         copy_location->set_start (new_start);
2937                                 } else if (newframe > 0) {
2938                                         _editor->snap_to (next, 1, true);
2939                                         copy_location->set_end (next);
2940                                         copy_location->set_start (newframe);
2941                                 }
2942
2943                         } else { // end marker
2944
2945                                 if (move_both || (*x).move_both) {
2946                                         copy_location->set_end (new_end);
2947                                         copy_location->set_start (new_start);
2948                                 } else if (new_end > copy_location->start()) {
2949                                         copy_location->set_end (new_end);
2950                                 } else if (newframe > 0) {
2951                                         _editor->snap_to (next, -1, true);
2952                                         copy_location->set_start (next);
2953                                         copy_location->set_end (newframe);
2954                                 }
2955                         }
2956                 }
2957
2958                 update_item (copy_location);
2959                 
2960                 /* now lookup the actual GUI items used to display this
2961                  * location and move them to wherever the copy of the location
2962                  * is now. This means that the logic in ARDOUR::Location is
2963                  * still enforced, even though we are not (yet) modifying 
2964                  * the real Location itself.
2965                  */
2966                 
2967                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
2968
2969                 if (lm) {
2970                         lm->set_position (copy_location->start(), copy_location->end());
2971                 }
2972
2973         }
2974
2975         assert (!_copied_locations.empty());
2976
2977         show_verbose_cursor_time (newframe);
2978
2979 #ifdef GTKOSX
2980         _editor->update_canvas_now ();
2981 #endif
2982 }
2983
2984 void
2985 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2986 {
2987         if (!movement_occurred) {
2988
2989                 /* just a click, do nothing but finish
2990                    off the selection process
2991                 */
2992
2993                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2994
2995                 switch (op) {
2996                 case Selection::Set:
2997                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
2998                                 _editor->selection->set (_marker);
2999                         }
3000                         break;
3001
3002                 case Selection::Toggle:
3003                         /* we toggle on the button release, click only */
3004                         _editor->selection->toggle (_marker);
3005                         break;
3006
3007                 case Selection::Extend:
3008                 case Selection::Add:
3009                         break;
3010                 }
3011
3012                 return;
3013         }
3014
3015         _editor->_dragging_edit_point = false;
3016
3017         _editor->begin_reversible_command ( _("move marker") );
3018         XMLNode &before = _editor->session()->locations()->get_state();
3019
3020         MarkerSelection::iterator i;
3021         CopiedLocationInfo::iterator x;
3022         bool is_start;
3023
3024         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
3025              x != _copied_locations.end() && i != _editor->selection->markers.end();
3026              ++i, ++x) {
3027
3028                 Location * location = _editor->find_location_from_marker (*i, is_start);
3029
3030                 if (location) {
3031
3032                         if (location->locked()) {
3033                                 return;
3034                         }
3035
3036                         if (location->is_mark()) {
3037                                 location->set_start (((*x).location)->start());
3038                         } else {
3039                                 location->set (((*x).location)->start(), ((*x).location)->end());
3040                         }
3041                 }
3042         }
3043
3044         XMLNode &after = _editor->session()->locations()->get_state();
3045         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
3046         _editor->commit_reversible_command ();
3047 }
3048
3049 void
3050 MarkerDrag::aborted (bool)
3051 {
3052         /* XXX: TODO */
3053 }
3054
3055 void
3056 MarkerDrag::update_item (Location*)
3057 {
3058         /* noop */
3059 }
3060
3061 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
3062         : Drag (e, i),
3063           _cumulative_x_drag (0),
3064           _cumulative_y_drag (0)
3065 {
3066         if (_zero_gain_fraction < 0.0) {
3067                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
3068         }
3069
3070         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
3071
3072         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
3073         assert (_point);
3074 }
3075
3076
3077 void
3078 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3079 {
3080         Drag::start_grab (event, _editor->cursors()->fader);
3081
3082         // start the grab at the center of the control point so
3083         // the point doesn't 'jump' to the mouse after the first drag
3084         _fixed_grab_x = _point->get_x();
3085         _fixed_grab_y = _point->get_y();
3086
3087         float const fraction = 1 - (_point->get_y() / _point->line().height());
3088
3089         _point->line().start_drag_single (_point, _fixed_grab_x, fraction);
3090
3091         _editor->verbose_cursor()->set (_point->line().get_verbose_cursor_string (fraction),
3092                                         event->button.x + 10, event->button.y + 10);
3093
3094         _editor->verbose_cursor()->show ();
3095
3096         _pushing = Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier);
3097
3098         if (!_point->can_slide ()) {
3099                 _x_constrained = true;
3100         }
3101 }
3102
3103 void
3104 ControlPointDrag::motion (GdkEvent* event, bool)
3105 {
3106         double dx = _drags->current_pointer_x() - last_pointer_x();
3107         double dy = _drags->current_pointer_y() - last_pointer_y();
3108
3109         if (event->button.state & Keyboard::SecondaryModifier) {
3110                 dx *= 0.1;
3111                 dy *= 0.1;
3112         }
3113
3114         /* coordinate in pixels relative to the start of the region (for region-based automation)
3115            or track (for track-based automation) */
3116         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
3117         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
3118
3119         // calculate zero crossing point. back off by .01 to stay on the
3120         // positive side of zero
3121         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
3122
3123         // make sure we hit zero when passing through
3124         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
3125                 cy = zero_gain_y;
3126         }
3127
3128         if (_x_constrained) {
3129                 cx = _fixed_grab_x;
3130         }
3131         if (_y_constrained) {
3132                 cy = _fixed_grab_y;
3133         }
3134
3135         _cumulative_x_drag = cx - _fixed_grab_x;
3136         _cumulative_y_drag = cy - _fixed_grab_y;
3137
3138         cx = max (0.0, cx);
3139         cy = max (0.0, cy);
3140         cy = min ((double) _point->line().height(), cy);
3141
3142         framepos_t cx_frames = _editor->unit_to_frame (cx);
3143
3144         if (!_x_constrained) {
3145                 _editor->snap_to_with_modifier (cx_frames, event);
3146         }
3147
3148         cx_frames = min (cx_frames, _point->line().maximum_time());
3149
3150         float const fraction = 1.0 - (cy / _point->line().height());
3151
3152         _point->line().drag_motion (_editor->frame_to_unit_unrounded (cx_frames), fraction, false, _pushing, _final_index);
3153
3154         _editor->verbose_cursor()->set_text (_point->line().get_verbose_cursor_string (fraction));
3155 }
3156
3157 void
3158 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
3159 {
3160         if (!movement_occurred) {
3161
3162                 /* just a click */
3163
3164                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3165                         _editor->reset_point_selection ();
3166                 }
3167
3168         } else {
3169                 motion (event, false);
3170         }
3171
3172         _point->line().end_drag (_pushing, _final_index);
3173         _editor->session()->commit_reversible_command ();
3174 }
3175
3176 void
3177 ControlPointDrag::aborted (bool)
3178 {
3179         _point->line().reset ();
3180 }
3181
3182 bool
3183 ControlPointDrag::active (Editing::MouseMode m)
3184 {
3185         if (m == Editing::MouseGain) {
3186                 /* always active in mouse gain */
3187                 return true;
3188         }
3189
3190         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
3191         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
3192 }
3193
3194 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
3195         : Drag (e, i),
3196           _line (0),
3197           _cumulative_y_drag (0)
3198 {
3199         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
3200 }
3201
3202 void
3203 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3204 {
3205         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
3206         assert (_line);
3207
3208         _item = &_line->grab_item ();
3209
3210         /* need to get x coordinate in terms of parent (TimeAxisItemView)
3211            origin, and ditto for y.
3212         */
3213
3214         double cx = event->button.x;
3215         double cy = event->button.y;
3216
3217         _line->parent_group().w2i (cx, cy);
3218
3219         framecnt_t const frame_within_region = (framecnt_t) floor (cx * _editor->frames_per_unit);
3220
3221         uint32_t before;
3222         uint32_t after;
3223
3224         if (!_line->control_points_adjacent (frame_within_region, before, after)) {
3225                 /* no adjacent points */
3226                 return;
3227         }
3228
3229         Drag::start_grab (event, _editor->cursors()->fader);
3230
3231         /* store grab start in parent frame */
3232
3233         _fixed_grab_x = cx;
3234         _fixed_grab_y = cy;
3235
3236         double fraction = 1.0 - (cy / _line->height());
3237
3238         _line->start_drag_line (before, after, fraction);
3239
3240         _editor->verbose_cursor()->set (_line->get_verbose_cursor_string (fraction),
3241                                         event->button.x + 10, event->button.y + 10);
3242
3243         _editor->verbose_cursor()->show ();
3244 }
3245
3246 void
3247 LineDrag::motion (GdkEvent* event, bool)
3248 {
3249         double dy = _drags->current_pointer_y() - last_pointer_y();
3250
3251         if (event->button.state & Keyboard::SecondaryModifier) {
3252                 dy *= 0.1;
3253         }
3254
3255         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
3256
3257         _cumulative_y_drag = cy - _fixed_grab_y;
3258
3259         cy = max (0.0, cy);
3260         cy = min ((double) _line->height(), cy);
3261
3262         double const fraction = 1.0 - (cy / _line->height());
3263         uint32_t ignored;
3264
3265         /* we are ignoring x position for this drag, so we can just pass in anything */
3266         _line->drag_motion (0, fraction, true, false, ignored);
3267
3268         _editor->verbose_cursor()->set_text (_line->get_verbose_cursor_string (fraction));
3269 }
3270
3271 void
3272 LineDrag::finished (GdkEvent* event, bool)
3273 {
3274         motion (event, false);
3275         _line->end_drag (false, 0);
3276         _editor->session()->commit_reversible_command ();
3277 }
3278
3279 void
3280 LineDrag::aborted (bool)
3281 {
3282         _line->reset ();
3283 }
3284
3285 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
3286         : Drag (e, i),
3287           _line (0),
3288           _cumulative_x_drag (0)
3289 {
3290         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
3291 }
3292
3293 void
3294 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3295 {
3296         Drag::start_grab (event);
3297
3298         _line = reinterpret_cast<Line*> (_item);
3299         assert (_line);
3300
3301         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
3302
3303         double cx = event->button.x;
3304         double cy = event->button.y;
3305
3306         _item->property_parent().get_value()->w2i(cx, cy);
3307
3308         /* store grab start in parent frame */
3309         _region_view_grab_x = cx;
3310
3311         _before = *(float*) _item->get_data ("position");
3312
3313         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
3314
3315         _max_x = _editor->frame_to_pixel(_arv->get_duration());
3316 }
3317
3318 void
3319 FeatureLineDrag::motion (GdkEvent*, bool)
3320 {
3321         double dx = _drags->current_pointer_x() - last_pointer_x();
3322
3323         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
3324
3325         _cumulative_x_drag += dx;
3326
3327         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
3328
3329         if (cx > _max_x){
3330                 cx = _max_x;
3331         }
3332         else if(cx < 0){
3333                 cx = 0;
3334         }
3335
3336         ArdourCanvas::Points points;
3337
3338         double x1 = 0, x2 = 0, y1 = 0, y2 = 0;
3339
3340         _line->get_bounds(x1, y2, x2, y2);
3341
3342         points.push_back(Gnome::Art::Point(cx, 2.0)); // first x-coord needs to be a non-normal value
3343         points.push_back(Gnome::Art::Point(cx, y2 - y1));
3344
3345         _line->property_points() = points;
3346
3347         float *pos = new float;
3348         *pos = cx;
3349
3350         _line->set_data ("position", pos);
3351
3352         _before = cx;
3353 }
3354
3355 void
3356 FeatureLineDrag::finished (GdkEvent*, bool)
3357 {
3358         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
3359         _arv->update_transient(_before, _before);
3360 }
3361
3362 void
3363 FeatureLineDrag::aborted (bool)
3364 {
3365         //_line->reset ();
3366 }
3367
3368 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
3369         : Drag (e, i)
3370         , _vertical_only (false)
3371 {
3372         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
3373 }
3374
3375 void
3376 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3377 {
3378         Drag::start_grab (event);
3379         show_verbose_cursor_time (adjusted_current_frame (event));
3380 }
3381
3382 void
3383 RubberbandSelectDrag::motion (GdkEvent* event, bool)
3384 {
3385         framepos_t start;
3386         framepos_t end;
3387         double y1;
3388         double y2;
3389
3390         framepos_t const pf = adjusted_current_frame (event, Config->get_rubberbanding_snaps_to_grid ());
3391
3392         framepos_t grab = grab_frame ();
3393         if (Config->get_rubberbanding_snaps_to_grid ()) {
3394                 _editor->snap_to_with_modifier (grab, event);
3395         }
3396
3397         /* base start and end on initial click position */
3398
3399         if (pf < grab) {
3400                 start = pf;
3401                 end = grab;
3402         } else {
3403                 end = pf;
3404                 start = grab;
3405         }
3406
3407         if (_drags->current_pointer_y() < grab_y()) {
3408                 y1 = _drags->current_pointer_y();
3409                 y2 = grab_y();
3410         } else {
3411                 y2 = _drags->current_pointer_y();
3412                 y1 = grab_y();
3413         }
3414
3415
3416         if (start != end || y1 != y2) {
3417
3418                 double x1 = _editor->frame_to_pixel (start);
3419                 double x2 = _editor->frame_to_pixel (end);
3420
3421                 _editor->rubberband_rect->property_x1() = x1;
3422                 if (_vertical_only) {
3423                         /* fixed 10 pixel width */
3424                         _editor->rubberband_rect->property_x2() = x1 + 10;
3425                 } else {
3426                         _editor->rubberband_rect->property_x2() = x2;
3427                 } 
3428
3429                 _editor->rubberband_rect->property_y1() = y1;
3430                 _editor->rubberband_rect->property_y2() = y2;
3431
3432                 _editor->rubberband_rect->show();
3433                 _editor->rubberband_rect->raise_to_top();
3434
3435                 show_verbose_cursor_time (pf);
3436
3437                 do_select_things (event, true);
3438         }
3439 }
3440
3441 void
3442 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
3443 {
3444         framepos_t x1;
3445         framepos_t x2;
3446         
3447         if (grab_frame() < last_pointer_frame()) {
3448                 x1 = grab_frame ();
3449                 x2 = last_pointer_frame ();
3450         } else {
3451                 x2 = grab_frame ();
3452                 x1 = last_pointer_frame ();
3453         }
3454
3455         double y1;
3456         double y2;
3457         
3458         if (_drags->current_pointer_y() < grab_y()) {
3459                 y1 = _drags->current_pointer_y();
3460                 y2 = grab_y();
3461         } else {
3462                 y2 = _drags->current_pointer_y();
3463                 y1 = grab_y();
3464         }
3465
3466         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
3467 }
3468
3469 void
3470 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
3471 {
3472         if (movement_occurred) {
3473
3474                 motion (event, false);
3475                 do_select_things (event, false);
3476
3477         } else {
3478
3479                 /* just a click */
3480
3481                 bool do_deselect = true;
3482                 MidiTimeAxisView* mtv;
3483
3484                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
3485                         /* MIDI track */
3486                         if (_editor->selection->empty()) {
3487                                 /* nothing selected */
3488                                 add_midi_region (mtv);
3489                                 do_deselect = false;
3490                         }
3491                 } 
3492
3493                 /* do not deselect if Primary or Tertiary (toggle-select or
3494                  * extend-select are pressed.
3495                  */
3496
3497                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) && 
3498                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) && 
3499                     do_deselect) {
3500                         deselect_things ();
3501                 }
3502
3503         }
3504
3505         _editor->rubberband_rect->hide();
3506 }
3507
3508 void
3509 RubberbandSelectDrag::aborted (bool)
3510 {
3511         _editor->rubberband_rect->hide ();
3512 }
3513
3514 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
3515         : RegionDrag (e, i, p, v)
3516 {
3517         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
3518 }
3519
3520 void
3521 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3522 {
3523         Drag::start_grab (event, cursor);
3524
3525         show_verbose_cursor_time (adjusted_current_frame (event));
3526 }
3527
3528 void
3529 TimeFXDrag::motion (GdkEvent* event, bool)
3530 {
3531         RegionView* rv = _primary;
3532         StreamView* cv = rv->get_time_axis_view().view ();
3533
3534         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
3535         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
3536         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
3537
3538         framepos_t const pf = adjusted_current_frame (event);
3539
3540         if (pf > rv->region()->position()) {
3541                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
3542         }
3543
3544         show_verbose_cursor_time (pf);
3545 }
3546
3547 void
3548 TimeFXDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3549 {
3550         _primary->get_time_axis_view().hide_timestretch ();
3551
3552         if (!movement_occurred) {
3553                 return;
3554         }
3555
3556         if (last_pointer_frame() < _primary->region()->position()) {
3557                 /* backwards drag of the left edge - not usable */
3558                 return;
3559         }
3560
3561         framecnt_t newlen = last_pointer_frame() - _primary->region()->position();
3562
3563         float percentage = (double) newlen / (double) _primary->region()->length();
3564
3565 #ifndef USE_RUBBERBAND
3566         // Soundtouch uses percentage / 100 instead of normal (/ 1)
3567         if (_primary->region()->data_type() == DataType::AUDIO) {
3568                 percentage = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
3569         }
3570 #endif
3571
3572         if (!_editor->get_selection().regions.empty()) {
3573                 /* primary will already be included in the selection, and edit
3574                    group shared editing will propagate selection across
3575                    equivalent regions, so just use the current region
3576                    selection.
3577                 */
3578
3579                 if (_editor->time_stretch (_editor->get_selection().regions, percentage) == -1) {
3580                         error << _("An error occurred while executing time stretch operation") << endmsg;
3581                 }
3582         }
3583 }
3584
3585 void
3586 TimeFXDrag::aborted (bool)
3587 {
3588         _primary->get_time_axis_view().hide_timestretch ();
3589 }
3590
3591 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
3592         : Drag (e, i)
3593 {
3594         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
3595 }
3596
3597 void
3598 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3599 {
3600         Drag::start_grab (event);
3601 }
3602
3603 void
3604 ScrubDrag::motion (GdkEvent* /*event*/, bool)
3605 {
3606         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
3607 }
3608
3609 void
3610 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3611 {
3612         if (movement_occurred && _editor->session()) {
3613                 /* make sure we stop */
3614                 _editor->session()->request_transport_speed (0.0);
3615         }
3616 }
3617
3618 void
3619 ScrubDrag::aborted (bool)
3620 {
3621         /* XXX: TODO */
3622 }
3623
3624 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3625         : Drag (e, i)
3626         , _operation (o)
3627         , _add (false)
3628         , _extend (false)
3629         , _original_pointer_time_axis (-1)
3630         , _last_pointer_time_axis (-1)
3631         , _time_selection_at_start (!_editor->get_selection().time.empty())
3632 {
3633         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
3634         
3635         if (_time_selection_at_start) {
3636                 start_at_start = _editor->get_selection().time.start();
3637                 end_at_start = _editor->get_selection().time.end_frame();
3638         }
3639 }
3640
3641 void
3642 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
3643 {
3644         if (_editor->session() == 0) {
3645                 return;
3646         }
3647
3648         Gdk::Cursor* cursor = 0;
3649
3650         switch (_operation) {
3651         case CreateSelection:
3652                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
3653                         _add = true;
3654                 } else {
3655                         _add = false;
3656                 }
3657                 cursor = _editor->cursors()->selector;
3658                 Drag::start_grab (event, cursor);
3659                 break;
3660
3661         case SelectionStartTrim:
3662                 if (_editor->clicked_axisview) {
3663                         _editor->clicked_axisview->order_selection_trims (_item, true);
3664                 }
3665                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
3666                 break;
3667
3668         case SelectionEndTrim:
3669                 if (_editor->clicked_axisview) {
3670                         _editor->clicked_axisview->order_selection_trims (_item, false);
3671                 }
3672                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
3673                 break;
3674
3675         case SelectionMove:
3676                 Drag::start_grab (event, cursor);
3677                 break;
3678
3679         case SelectionExtend:
3680                 Drag::start_grab (event, cursor);
3681                 break;
3682         }
3683
3684         if (_operation == SelectionMove) {
3685                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
3686         } else {
3687                 show_verbose_cursor_time (adjusted_current_frame (event));
3688         }
3689
3690         _original_pointer_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ()).first->order ();
3691 }
3692
3693 void
3694 SelectionDrag::setup_pointer_frame_offset ()
3695 {
3696         switch (_operation) {
3697         case CreateSelection:
3698                 _pointer_frame_offset = 0;
3699                 break;
3700
3701         case SelectionStartTrim:
3702         case SelectionMove:
3703                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
3704                 break;
3705
3706         case SelectionEndTrim:
3707                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
3708                 break;
3709
3710         case SelectionExtend:
3711                 break;
3712         }
3713 }
3714
3715 void
3716 SelectionDrag::motion (GdkEvent* event, bool first_move)
3717 {
3718         framepos_t start = 0;
3719         framepos_t end = 0;
3720         framecnt_t length = 0;
3721         framecnt_t distance = 0;
3722
3723         pair<TimeAxisView*, int> const pending_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ());
3724         if (pending_time_axis.first == 0) {
3725                 return;
3726         }
3727
3728         framepos_t const pending_position = adjusted_current_frame (event);
3729
3730         /* only alter selection if things have changed */
3731
3732         if (pending_time_axis.first->order() == _last_pointer_time_axis && pending_position == last_pointer_frame()) {
3733                 return;
3734         }
3735
3736         switch (_operation) {
3737         case CreateSelection:
3738         {
3739                 framepos_t grab = grab_frame ();
3740
3741                 if (first_move) {
3742                         grab = adjusted_current_frame (event, false);
3743                         if (grab < pending_position) {
3744                                 _editor->snap_to (grab, -1);
3745                         }  else {
3746                                 _editor->snap_to (grab, 1);
3747                         }
3748                 }
3749
3750                 if (pending_position < grab) {
3751                         start = pending_position;
3752                         end = grab;
3753                 } else {
3754                         end = pending_position;
3755                         start = grab;
3756                 }
3757
3758                 /* first drag: Either add to the selection
3759                    or create a new selection
3760                 */
3761
3762                 if (first_move) {
3763
3764                         if (_add) {
3765                                 /* adding to the selection */
3766                                 _editor->set_selected_track_as_side_effect (Selection::Add);
3767                                 //_editor->selection->add (_editor->clicked_axisview);
3768                                 _editor->clicked_selection = _editor->selection->add (start, end);
3769                                 _add = false;
3770                         } else {
3771                                 /* new selection */
3772
3773                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3774                                         //_editor->selection->set (_editor->clicked_axisview);
3775                                         _editor->set_selected_track_as_side_effect (Selection::Set);
3776                                 }
3777
3778                                 _editor->clicked_selection = _editor->selection->set (start, end);
3779                         }
3780                 }
3781
3782                 /* select the track that we're in */
3783                 if (find (_added_time_axes.begin(), _added_time_axes.end(), pending_time_axis.first) == _added_time_axes.end()) {
3784                         // _editor->set_selected_track_as_side_effect (Selection::Add);
3785                         _editor->selection->add (pending_time_axis.first);
3786                         _added_time_axes.push_back (pending_time_axis.first);
3787                 }
3788
3789                 /* deselect any tracks that this drag no longer includes, being careful to only deselect
3790                    tracks that we selected in the first place.
3791                 */
3792
3793                 int min_order = min (_original_pointer_time_axis, pending_time_axis.first->order());
3794                 int max_order = max (_original_pointer_time_axis, pending_time_axis.first->order());
3795
3796                 list<TimeAxisView*>::iterator i = _added_time_axes.begin();
3797                 while (i != _added_time_axes.end()) {
3798
3799                         list<TimeAxisView*>::iterator tmp = i;
3800                         ++tmp;
3801
3802                         if ((*i)->order() < min_order || (*i)->order() > max_order) {
3803                                 _editor->selection->remove (*i);
3804                                 _added_time_axes.remove (*i);
3805                         }
3806
3807                         i = tmp;
3808                 }
3809
3810         }
3811         break;
3812
3813         case SelectionStartTrim:
3814
3815                 start = _editor->selection->time[_editor->clicked_selection].start;
3816                 end = _editor->selection->time[_editor->clicked_selection].end;
3817
3818                 if (pending_position > end) {
3819                         start = end;
3820                 } else {
3821                         start = pending_position;
3822                 }
3823                 break;
3824
3825         case SelectionEndTrim:
3826
3827                 start = _editor->selection->time[_editor->clicked_selection].start;
3828                 end = _editor->selection->time[_editor->clicked_selection].end;
3829
3830                 if (pending_position < start) {
3831                         end = start;
3832                 } else {
3833                         end = pending_position;
3834                 }
3835
3836                 break;
3837                 
3838         case SelectionMove:
3839
3840                 start = _editor->selection->time[_editor->clicked_selection].start;
3841                 end = _editor->selection->time[_editor->clicked_selection].end;
3842
3843                 length = end - start;
3844                 distance = pending_position - start;
3845                 start = pending_position;
3846                 _editor->snap_to (start);
3847
3848                 end = start + length;
3849
3850                 break;
3851
3852         case SelectionExtend:
3853                 break;
3854         }
3855
3856         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3857                 _editor->start_canvas_autoscroll (1, 0);
3858         }
3859
3860         if (start != end) {
3861                 switch (_operation) {
3862                 case SelectionMove:     
3863                         if (_time_selection_at_start) {
3864                                 _editor->selection->move_time (distance);
3865                         }
3866                         break;
3867                 default:
3868                         _editor->selection->replace (_editor->clicked_selection, start, end);
3869                 }
3870         }
3871
3872         if (_operation == SelectionMove) {
3873                 show_verbose_cursor_time(start);
3874         } else {
3875                 show_verbose_cursor_time(pending_position);
3876         }
3877 }
3878
3879 void
3880 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
3881 {
3882         Session* s = _editor->session();
3883
3884         if (movement_occurred) {
3885                 motion (event, false);
3886                 /* XXX this is not object-oriented programming at all. ick */
3887                 if (_editor->selection->time.consolidate()) {
3888                         _editor->selection->TimeChanged ();
3889                 }
3890
3891                 /* XXX what if its a music time selection? */
3892                 if (s) {
3893                         if ( s->get_play_range() && s->transport_rolling() ) {
3894                                 s->request_play_range (&_editor->selection->time, true);
3895                         } else {
3896                                 if (Config->get_always_play_range() && !s->transport_rolling()) {
3897                                         s->request_locate (_editor->get_selection().time.start());
3898                                 }
3899                         }
3900                 }
3901
3902         } else {
3903                 /* just a click, no pointer movement.
3904                  */
3905
3906                 if (_operation == SelectionExtend) {
3907                         if (_time_selection_at_start) {
3908                                 framepos_t pos = adjusted_current_frame (event, false);
3909                                 framepos_t start = min (pos, start_at_start);
3910                                 framepos_t end = max (pos, end_at_start);
3911                                 _editor->selection->set (start, end);
3912                         }
3913                 } else {
3914                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
3915                                 if (_editor->clicked_selection) {
3916                                         _editor->selection->remove (_editor->clicked_selection);
3917                                 }
3918                         } else {
3919                                 if (!_editor->clicked_selection) {
3920                                         _editor->selection->clear_time();
3921                                 }
3922                         }
3923                 }
3924
3925                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3926                         _editor->selection->set (_editor->clicked_axisview);
3927                 }
3928                         
3929                 if (s && s->get_play_range () && s->transport_rolling()) {
3930                         s->request_stop (false, false);
3931                 }
3932
3933         }
3934
3935         _editor->stop_canvas_autoscroll ();
3936         _editor->clicked_selection = 0;
3937 }
3938
3939 void
3940 SelectionDrag::aborted (bool)
3941 {
3942         /* XXX: TODO */
3943 }
3944
3945 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3946         : Drag (e, i),
3947           _operation (o),
3948           _copy (false)
3949 {
3950         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
3951
3952         _drag_rect = new ArdourCanvas::SimpleRect (*_editor->time_line_group, 0.0, 0.0, 0.0,
3953                                                    physical_screen_height (_editor->get_window()));
3954         _drag_rect->hide ();
3955
3956         _drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3957         _drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3958 }
3959
3960 void
3961 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3962 {
3963         if (_editor->session() == 0) {
3964                 return;
3965         }
3966
3967         Gdk::Cursor* cursor = 0;
3968
3969         if (!_editor->temp_location) {
3970                 _editor->temp_location = new Location (*_editor->session());
3971         }
3972
3973         switch (_operation) {
3974         case CreateRangeMarker:
3975         case CreateTransportMarker:
3976         case CreateCDMarker:
3977
3978                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3979                         _copy = true;
3980                 } else {
3981                         _copy = false;
3982                 }
3983                 cursor = _editor->cursors()->selector;
3984                 break;
3985         }
3986
3987         Drag::start_grab (event, cursor);
3988
3989         show_verbose_cursor_time (adjusted_current_frame (event));
3990 }
3991
3992 void
3993 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
3994 {
3995         framepos_t start = 0;
3996         framepos_t end = 0;
3997         ArdourCanvas::SimpleRect *crect;
3998
3999         switch (_operation) {
4000         case CreateRangeMarker:
4001                 crect = _editor->range_bar_drag_rect;
4002                 break;
4003         case CreateTransportMarker:
4004                 crect = _editor->transport_bar_drag_rect;
4005                 break;
4006         case CreateCDMarker:
4007                 crect = _editor->cd_marker_bar_drag_rect;
4008                 break;
4009         default:
4010                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
4011                 return;
4012                 break;
4013         }
4014
4015         framepos_t const pf = adjusted_current_frame (event);
4016
4017         if (_operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
4018                 framepos_t grab = grab_frame ();
4019                 _editor->snap_to (grab);
4020
4021                 if (pf < grab_frame()) {
4022                         start = pf;
4023                         end = grab;
4024                 } else {
4025                         end = pf;
4026                         start = grab;
4027                 }
4028
4029                 /* first drag: Either add to the selection
4030                    or create a new selection.
4031                 */
4032
4033                 if (first_move) {
4034
4035                         _editor->temp_location->set (start, end);
4036
4037                         crect->show ();
4038
4039                         update_item (_editor->temp_location);
4040                         _drag_rect->show();
4041                         //_drag_rect->raise_to_top();
4042
4043                 }
4044         }
4045
4046         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
4047                 _editor->start_canvas_autoscroll (1, 0);
4048         }
4049
4050         if (start != end) {
4051                 _editor->temp_location->set (start, end);
4052
4053                 double x1 = _editor->frame_to_pixel (start);
4054                 double x2 = _editor->frame_to_pixel (end);
4055                 crect->property_x1() = x1;
4056                 crect->property_x2() = x2;
4057
4058                 update_item (_editor->temp_location);
4059         }
4060
4061         show_verbose_cursor_time (pf);
4062
4063 }
4064
4065 void
4066 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
4067 {
4068         Location * newloc = 0;
4069         string rangename;
4070         int flags;
4071
4072         if (movement_occurred) {
4073                 motion (event, false);
4074                 _drag_rect->hide();
4075
4076                 switch (_operation) {
4077                 case CreateRangeMarker:
4078                 case CreateCDMarker:
4079                     {
4080                         _editor->begin_reversible_command (_("new range marker"));
4081                         XMLNode &before = _editor->session()->locations()->get_state();
4082                         _editor->session()->locations()->next_available_name(rangename,"unnamed");
4083                         if (_operation == CreateCDMarker) {
4084                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
4085                                 _editor->cd_marker_bar_drag_rect->hide();
4086                         }
4087                         else {
4088                                 flags = Location::IsRangeMarker;
4089                                 _editor->range_bar_drag_rect->hide();
4090                         }
4091                         newloc = new Location (
4092                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
4093                                 );
4094
4095                         _editor->session()->locations()->add (newloc, true);
4096                         XMLNode &after = _editor->session()->locations()->get_state();
4097                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4098                         _editor->commit_reversible_command ();
4099                         break;
4100                     }
4101
4102                 case CreateTransportMarker:
4103                         // popup menu to pick loop or punch
4104                         _editor->new_transport_marker_context_menu (&event->button, _item);
4105                         break;
4106                 }
4107         } else {
4108                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
4109
4110                 if (Keyboard::no_modifier_keys_pressed (&event->button) && _operation != CreateCDMarker) {
4111
4112                         framepos_t start;
4113                         framepos_t end;
4114
4115                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
4116
4117                         if (end == max_framepos) {
4118                                 end = _editor->session()->current_end_frame ();
4119                         }
4120
4121                         if (start == max_framepos) {
4122                                 start = _editor->session()->current_start_frame ();
4123                         }
4124
4125                         switch (_editor->mouse_mode) {
4126                         case MouseObject:
4127                                 /* find the two markers on either side and then make the selection from it */
4128                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
4129                                 break;
4130
4131                         case MouseRange:
4132                                 /* find the two markers on either side of the click and make the range out of it */
4133                                 _editor->selection->set (start, end);
4134                                 break;
4135
4136                         default:
4137                                 break;
4138                         }
4139                 }
4140         }
4141
4142         _editor->stop_canvas_autoscroll ();
4143 }
4144
4145 void
4146 RangeMarkerBarDrag::aborted (bool)
4147 {
4148         /* XXX: TODO */
4149 }
4150
4151 void
4152 RangeMarkerBarDrag::update_item (Location* location)
4153 {
4154         double const x1 = _editor->frame_to_pixel (location->start());
4155         double const x2 = _editor->frame_to_pixel (location->end());
4156
4157         _drag_rect->property_x1() = x1;
4158         _drag_rect->property_x2() = x2;
4159 }
4160
4161 MouseZoomDrag::MouseZoomDrag (Editor* e, ArdourCanvas::Item* i)
4162         : Drag (e, i)
4163         , _zoom_out (false)
4164 {
4165         DEBUG_TRACE (DEBUG::Drags, "New MouseZoomDrag\n");
4166 }
4167
4168 void
4169 MouseZoomDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4170 {
4171         if (Keyboard::the_keyboard().key_is_down (GDK_Control_L)) {
4172                 Drag::start_grab (event, _editor->cursors()->zoom_out);
4173                 _zoom_out = true;
4174         } else {
4175                 Drag::start_grab (event, _editor->cursors()->zoom_in);
4176                 _zoom_out = false;
4177         }
4178
4179         show_verbose_cursor_time (adjusted_current_frame (event));
4180 }
4181
4182 void
4183 MouseZoomDrag::motion (GdkEvent* event, bool first_move)
4184 {
4185         framepos_t start;
4186         framepos_t end;
4187
4188         framepos_t const pf = adjusted_current_frame (event);
4189
4190         framepos_t grab = grab_frame ();
4191         _editor->snap_to_with_modifier (grab, event);
4192
4193         /* base start and end on initial click position */
4194         if (pf < grab) {
4195                 start = pf;
4196                 end = grab;
4197         } else {
4198                 end = pf;
4199                 start = grab;
4200         }
4201
4202         if (start != end) {
4203
4204                 if (first_move) {
4205                         _editor->zoom_rect->show();
4206                         _editor->zoom_rect->raise_to_top();
4207                 }
4208
4209                 _editor->reposition_zoom_rect(start, end);
4210
4211                 show_verbose_cursor_time (pf);
4212         }
4213 }
4214
4215 void
4216 MouseZoomDrag::finished (GdkEvent* event, bool movement_occurred)
4217 {
4218         if (movement_occurred) {
4219                 motion (event, false);
4220
4221                 if (grab_frame() < last_pointer_frame()) {
4222                         _editor->temporal_zoom_by_frame (grab_frame(), last_pointer_frame());
4223                 } else {
4224                         _editor->temporal_zoom_by_frame (last_pointer_frame(), grab_frame());
4225                 }
4226         } else {
4227                 if (Keyboard::the_keyboard().key_is_down (GDK_Shift_L)) {
4228                         _editor->tav_zoom_step (_zoom_out);
4229                 } else {
4230                         _editor->temporal_zoom_to_frame (_zoom_out, grab_frame());
4231                 }
4232         }
4233
4234         _editor->zoom_rect->hide();
4235 }
4236
4237 void
4238 MouseZoomDrag::aborted (bool)
4239 {
4240         _editor->zoom_rect->hide ();
4241 }
4242
4243 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
4244         : Drag (e, i)
4245         , _cumulative_dx (0)
4246         , _cumulative_dy (0)
4247 {
4248         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
4249
4250         _primary = dynamic_cast<CanvasNoteEvent*> (_item);
4251         _region = &_primary->region_view ();
4252         _note_height = _region->midi_stream_view()->note_height ();
4253 }
4254
4255 void
4256 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4257 {
4258         Drag::start_grab (event);
4259
4260         if (!(_was_selected = _primary->selected())) {
4261
4262                 /* tertiary-click means extend selection - we'll do that on button release,
4263                    so don't add it here, because otherwise we make it hard to figure
4264                    out the "extend-to" range.
4265                 */
4266
4267                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
4268
4269                 if (!extend) {
4270                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
4271
4272                         if (add) {
4273                                 _region->note_selected (_primary, true);
4274                         } else {
4275                                 _region->unique_select (_primary);
4276                         }
4277                 }
4278         }
4279 }
4280
4281 /** @return Current total drag x change in frames */
4282 frameoffset_t
4283 NoteDrag::total_dx () const
4284 {
4285         /* dx in frames */
4286         frameoffset_t const dx = _editor->unit_to_frame (_drags->current_pointer_x() - grab_x());
4287
4288         /* primary note time */
4289         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
4290
4291         /* new time of the primary note in session frames */
4292         frameoffset_t st = n + dx;
4293
4294         framepos_t const rp = _region->region()->position ();
4295
4296         /* prevent the note being dragged earlier than the region's position */
4297         st = max (st, rp);
4298
4299         /* snap and return corresponding delta */
4300         return _region->snap_frame_to_frame (st - rp) + rp - n;
4301 }
4302
4303 /** @return Current total drag y change in note number */
4304 int8_t
4305 NoteDrag::total_dy () const
4306 {
4307         MidiStreamView* msv = _region->midi_stream_view ();
4308         double const y = _region->midi_view()->y_position ();
4309         /* new current note */
4310         uint8_t n = msv->y_to_note (_drags->current_pointer_y () - y);
4311         /* clamp */
4312         n = max (msv->lowest_note(), n);
4313         n = min (msv->highest_note(), n);
4314         /* and work out delta */
4315         return n - msv->y_to_note (grab_y() - y);
4316 }
4317
4318 void
4319 NoteDrag::motion (GdkEvent *, bool)
4320 {
4321         /* Total change in x and y since the start of the drag */
4322         frameoffset_t const dx = total_dx ();
4323         int8_t const dy = total_dy ();
4324
4325         /* Now work out what we have to do to the note canvas items to set this new drag delta */
4326         double const tdx = _editor->frame_to_unit (dx) - _cumulative_dx;
4327         double const tdy = -dy * _note_height - _cumulative_dy;
4328
4329         if (tdx || tdy) {
4330                 _cumulative_dx += tdx;
4331                 _cumulative_dy += tdy;
4332
4333                 int8_t note_delta = total_dy();
4334
4335                 _region->move_selection (tdx, tdy, note_delta);
4336
4337                 /* the new note value may be the same as the old one, but we
4338                  * don't know what that means because the selection may have
4339                  * involved more than one note and we might be doing something
4340                  * odd with them. so show the note value anyway, always.
4341                  */
4342
4343                 char buf[12];
4344                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
4345                 
4346                 snprintf (buf, sizeof (buf), "%s (%d)", Evoral::midi_note_name (new_note).c_str(),
4347                           (int) floor (new_note));
4348
4349                 show_verbose_cursor_text (buf);
4350         }
4351 }
4352
4353 void
4354 NoteDrag::finished (GdkEvent* ev, bool moved)
4355 {
4356         if (!moved) {
4357                 /* no motion - select note */
4358                 
4359                 if (_editor->current_mouse_mode() == Editing::MouseObject ||
4360                     _editor->current_mouse_mode() == Editing::MouseDraw) {
4361                         
4362                         if (_was_selected) {
4363                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
4364                                 if (add) {
4365                                         _region->note_deselected (_primary);
4366                                 }
4367                         } else {
4368                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
4369                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
4370
4371                                 if (!extend && !add && _region->selection_size() > 1) {
4372                                         _region->unique_select (_primary);
4373                                 } else if (extend) {
4374                                         _region->note_selected (_primary, true, true);
4375                                 } else {
4376                                         /* it was added during button press */
4377                                 }
4378                         }
4379                 }
4380         } else {
4381                 _region->note_dropped (_primary, total_dx(), total_dy());
4382         }
4383 }
4384
4385 void
4386 NoteDrag::aborted (bool)
4387 {
4388         /* XXX: TODO */
4389 }
4390
4391 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
4392 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
4393         : Drag (editor, atv->base_item ())
4394         , _ranges (r)
4395         , _nothing_to_drag (false)
4396 {
4397         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
4398         y_origin = atv->y_position();
4399         setup (atv->lines ());
4400 }
4401
4402 /** Make an AutomationRangeDrag for region gain lines */
4403 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AudioRegionView* rv, list<AudioRange> const & r)
4404         : Drag (editor, rv->get_canvas_group ())
4405         , _ranges (r)
4406         , _nothing_to_drag (false)
4407 {
4408         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
4409
4410         list<boost::shared_ptr<AutomationLine> > lines;
4411         lines.push_back (rv->get_gain_line ());
4412         y_origin = rv->get_time_axis_view().y_position();
4413         setup (lines);
4414 }
4415
4416 /** @param lines AutomationLines to drag.
4417  *  @param offset Offset from the session start to the points in the AutomationLines.
4418  */
4419 void
4420 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
4421 {
4422         /* find the lines that overlap the ranges being dragged */
4423         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
4424         while (i != lines.end ()) {
4425                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
4426                 ++j;
4427
4428                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
4429
4430                 /* check this range against all the AudioRanges that we are using */
4431                 list<AudioRange>::const_iterator k = _ranges.begin ();
4432                 while (k != _ranges.end()) {
4433                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
4434                                 break;
4435                         }
4436                         ++k;
4437                 }
4438
4439                 /* add it to our list if it overlaps at all */
4440                 if (k != _ranges.end()) {
4441                         Line n;
4442                         n.line = *i;
4443                         n.state = 0;
4444                         n.range = r;
4445                         _lines.push_back (n);
4446                 }
4447
4448                 i = j;
4449         }
4450
4451         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
4452 }
4453
4454 double
4455 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
4456 {
4457         return 1.0 - ((global_y - y_origin) / line->height());
4458 }
4459
4460 void
4461 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4462 {
4463         Drag::start_grab (event, cursor);
4464
4465         /* Get line states before we start changing things */
4466         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4467                 i->state = &i->line->get_state ();
4468                 i->original_fraction = y_fraction (i->line, _drags->current_pointer_y());
4469         }
4470
4471         if (_ranges.empty()) {
4472
4473                 /* No selected time ranges: drag all points */
4474                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4475                         uint32_t const N = i->line->npoints ();
4476                         for (uint32_t j = 0; j < N; ++j) {
4477                                 i->points.push_back (i->line->nth (j));
4478                         }
4479                 }
4480
4481         } else {
4482
4483                 for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
4484
4485                         framecnt_t const half = (i->start + i->end) / 2;
4486
4487                         /* find the line that this audio range starts in */
4488                         list<Line>::iterator j = _lines.begin();
4489                         while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
4490                                 ++j;
4491                         }
4492
4493                         if (j != _lines.end()) {
4494                                 boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
4495
4496                                 /* j is the line that this audio range starts in; fade into it;
4497                                    64 samples length plucked out of thin air.
4498                                 */
4499
4500                                 framepos_t a = i->start + 64;
4501                                 if (a > half) {
4502                                         a = half;
4503                                 }
4504
4505                                 double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
4506                                 double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
4507
4508                                 the_list->add (p, the_list->eval (p));
4509                                 the_list->add (q, the_list->eval (q));
4510                         }
4511
4512                         /* same thing for the end */
4513
4514                         j = _lines.begin();
4515                         while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
4516                                 ++j;
4517                         }
4518
4519                         if (j != _lines.end()) {
4520                                 boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
4521
4522                                 /* j is the line that this audio range starts in; fade out of it;
4523                                    64 samples length plucked out of thin air.
4524                                 */
4525
4526                                 framepos_t b = i->end - 64;
4527                                 if (b < half) {
4528                                         b = half;
4529                                 }
4530
4531                                 double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
4532                                 double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
4533
4534                                 the_list->add (p, the_list->eval (p));
4535                                 the_list->add (q, the_list->eval (q));
4536                         }
4537                 }
4538
4539                 _nothing_to_drag = true;
4540
4541                 /* Find all the points that should be dragged and put them in the relevant
4542                    points lists in the Line structs.
4543                 */
4544
4545                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4546
4547                         uint32_t const N = i->line->npoints ();
4548                         for (uint32_t j = 0; j < N; ++j) {
4549
4550                                 /* here's a control point on this line */
4551                                 ControlPoint* p = i->line->nth (j);
4552                                 double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
4553
4554                                 /* see if it's inside a range */
4555                                 list<AudioRange>::const_iterator k = _ranges.begin ();
4556                                 while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
4557                                         ++k;
4558                                 }
4559
4560                                 if (k != _ranges.end()) {
4561                                         /* dragging this point */
4562                                         _nothing_to_drag = false;
4563                                         i->points.push_back (p);
4564                                 }
4565                         }
4566                 }
4567         }
4568
4569         if (_nothing_to_drag) {
4570                 return;
4571         }
4572
4573         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4574                 i->line->start_drag_multiple (i->points, y_fraction (i->line, _drags->current_pointer_y()), i->state);
4575         }
4576 }
4577
4578 void
4579 AutomationRangeDrag::motion (GdkEvent*, bool /*first_move*/)
4580 {
4581         if (_nothing_to_drag) {
4582                 return;
4583         }
4584
4585         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
4586                 float const f = y_fraction (l->line, _drags->current_pointer_y());
4587                 /* we are ignoring x position for this drag, so we can just pass in anything */
4588                 uint32_t ignored;
4589                 l->line->drag_motion (0, f, true, false, ignored);
4590                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, f));
4591         }
4592 }
4593
4594 void
4595 AutomationRangeDrag::finished (GdkEvent* event, bool)
4596 {
4597         if (_nothing_to_drag) {
4598                 return;
4599         }
4600
4601         motion (event, false);
4602         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4603                 i->line->end_drag (false, 0);
4604         }
4605
4606         _editor->session()->commit_reversible_command ();
4607 }
4608
4609 void
4610 AutomationRangeDrag::aborted (bool)
4611 {
4612         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4613                 i->line->reset ();
4614         }
4615 }
4616
4617 DraggingView::DraggingView (RegionView* v, RegionDrag* parent)
4618         : view (v)
4619 {
4620         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
4621         layer = v->region()->layer ();
4622         initial_y = v->get_canvas_group()->property_y ();
4623         initial_playlist = v->region()->playlist ();
4624         initial_position = v->region()->position ();
4625         initial_end = v->region()->position () + v->region()->length ();
4626 }
4627
4628 PatchChangeDrag::PatchChangeDrag (Editor* e, CanvasPatchChange* i, MidiRegionView* r)
4629         : Drag (e, i)
4630         , _region_view (r)
4631         , _patch_change (i)
4632         , _cumulative_dx (0)
4633 {
4634         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
4635                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
4636                                                    grab_frame()));
4637 }
4638
4639 void
4640 PatchChangeDrag::motion (GdkEvent* ev, bool)
4641 {
4642         framepos_t f = adjusted_current_frame (ev);
4643         boost::shared_ptr<Region> r = _region_view->region ();
4644         f = max (f, r->position ());
4645         f = min (f, r->last_frame ());
4646
4647         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
4648         double const dxu = _editor->frame_to_unit (dxf); // permitted fx in units
4649         _patch_change->move (dxu - _cumulative_dx, 0);
4650         _cumulative_dx = dxu;
4651 }
4652
4653 void
4654 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
4655 {
4656         if (!movement_occurred) {
4657                 return;
4658         }
4659
4660         boost::shared_ptr<Region> r (_region_view->region ());
4661         framepos_t f = adjusted_current_frame (ev);
4662         f = max (f, r->position ());
4663         f = min (f, r->last_frame ());
4664
4665         _region_view->move_patch_change (
4666                 *_patch_change,
4667                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
4668                 );
4669 }
4670
4671 void
4672 PatchChangeDrag::aborted (bool)
4673 {
4674         _patch_change->move (-_cumulative_dx, 0);
4675 }
4676
4677 void
4678 PatchChangeDrag::setup_pointer_frame_offset ()
4679 {
4680         boost::shared_ptr<Region> region = _region_view->region ();
4681         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
4682 }
4683
4684 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
4685         : RubberbandSelectDrag (e, rv->get_canvas_frame ())
4686         , _region_view (rv)
4687 {
4688
4689 }
4690
4691 void
4692 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
4693 {
4694         framepos_t const p = _region_view->region()->position ();
4695         double const y = _region_view->midi_view()->y_position ();
4696
4697         x1 = max ((framepos_t) 0, x1 - p);
4698         x2 = max ((framepos_t) 0, x2 - p);
4699         y1 = max (0.0, y1 - y);
4700         y2 = max (0.0, y2 - y);
4701         
4702         _region_view->update_drag_selection (
4703                 _editor->frame_to_pixel (x1),
4704                 _editor->frame_to_pixel (x2),
4705                 y1,
4706                 y2,
4707                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
4708                 );
4709 }
4710
4711 void
4712 MidiRubberbandSelectDrag::deselect_things ()
4713 {
4714         /* XXX */
4715 }
4716
4717 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
4718         : RubberbandSelectDrag (e, rv->get_canvas_frame ())
4719         , _region_view (rv)
4720 {
4721         _vertical_only = true;
4722 }
4723
4724 void
4725 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
4726 {
4727         double const y = _region_view->midi_view()->y_position ();
4728
4729         y1 = max (0.0, y1 - y);
4730         y2 = max (0.0, y2 - y);
4731         
4732         _region_view->update_vertical_drag_selection (
4733                 y1,
4734                 y2,
4735                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
4736                 );
4737 }
4738
4739 void
4740 MidiVerticalSelectDrag::deselect_things ()
4741 {
4742         /* XXX */
4743 }
4744
4745 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4746         : RubberbandSelectDrag (e, i)
4747 {
4748
4749 }
4750
4751 void
4752 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
4753 {
4754         if (drag_in_progress) {
4755                 /* We just want to select things at the end of the drag, not during it */
4756                 return;
4757         }
4758         
4759         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
4760         
4761         _editor->begin_reversible_command (_("rubberband selection"));
4762         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
4763         _editor->commit_reversible_command ();
4764 }
4765
4766 void
4767 EditorRubberbandSelectDrag::deselect_things ()
4768 {
4769         if (!getenv("ARDOUR_SAE")) {
4770                 _editor->selection->clear_tracks();
4771         }
4772         _editor->selection->clear_regions();
4773         _editor->selection->clear_points ();
4774         _editor->selection->clear_lines ();
4775 }
4776
4777 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
4778         : Drag (e, i)
4779         , _region_view (rv)
4780         , _drag_rect (0)
4781 {
4782         
4783 }
4784
4785 NoteCreateDrag::~NoteCreateDrag ()
4786 {
4787         delete _drag_rect;
4788 }
4789
4790 framecnt_t
4791 NoteCreateDrag::grid_frames (framepos_t t) const
4792 {
4793         bool success;
4794         Evoral::MusicalTime grid_beats = _editor->get_grid_type_as_beats (success, t);
4795         if (!success) {
4796                 grid_beats = 1;
4797         }
4798
4799         return _region_view->region_beats_to_region_frames (grid_beats);
4800 }
4801
4802 void
4803 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4804 {
4805         Drag::start_grab (event, cursor);
4806                                                  
4807         _drag_rect = new ArdourCanvas::SimpleRect (*_region_view->get_canvas_group ());
4808
4809         framepos_t pf = _drags->current_pointer_frame ();
4810         framecnt_t const g = grid_frames (pf);
4811
4812         /* Hack so that we always snap to the note that we are over, instead of snapping
4813            to the next one if we're more than halfway through the one we're over.
4814         */
4815         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
4816                 pf -= g / 2;
4817         }
4818
4819         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
4820
4821         MidiStreamView* sv = _region_view->midi_stream_view ();
4822         double const x = _editor->frame_to_pixel (_note[0]);
4823         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
4824
4825         _drag_rect->property_x1() = x;
4826         _drag_rect->property_y1() = y;
4827         _drag_rect->property_x2() = x;
4828         _drag_rect->property_y2() = y + floor (_region_view->midi_stream_view()->note_height ());
4829
4830         _drag_rect->property_outline_what() = 0xff;
4831         _drag_rect->property_outline_color_rgba() = 0xffffff99;
4832         _drag_rect->property_fill_color_rgba()    = 0xffffff66;
4833 }
4834
4835 void
4836 NoteCreateDrag::motion (GdkEvent* event, bool)
4837 {
4838         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
4839         double const x = _editor->frame_to_pixel (_note[1]);
4840         if (_note[1] > _note[0]) {
4841                 _drag_rect->property_x2() = x;
4842         } else {
4843                 _drag_rect->property_x1() = x;
4844         }
4845 }
4846
4847 void
4848 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
4849 {
4850         if (!had_movement) {
4851                 return;
4852         }
4853         
4854         framepos_t const start = min (_note[0], _note[1]);
4855         framecnt_t length = (framecnt_t) fabs (_note[0] - _note[1]);
4856
4857         framecnt_t const g = grid_frames (start);
4858         double const one_tick = 1 / Timecode::BBT_Time::ticks_per_beat;
4859         
4860         if (_editor->snap_mode() == SnapNormal && length < g) {
4861                 length = g - one_tick;
4862         }
4863
4864         double const length_beats = max (one_tick, _region_view->region_frames_to_region_beats (length));
4865
4866         _region_view->create_note_at (start, _drag_rect->property_y1(), length_beats, false);
4867 }
4868
4869 double
4870 NoteCreateDrag::y_to_region (double y) const
4871 {
4872         double x = 0;
4873         _region_view->get_canvas_group()->w2i (x, y);
4874         return y;
4875 }
4876
4877 void
4878 NoteCreateDrag::aborted (bool)
4879 {
4880         
4881 }
4882
4883 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
4884         : Drag (e, i)
4885         , arv (rv)
4886         , start (start_yn)
4887 {
4888         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
4889 }
4890
4891 void
4892 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
4893 {
4894         Drag::start_grab (event, cursor);
4895 }
4896
4897 void
4898 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
4899 {
4900         double distance;
4901         double new_length;
4902         framecnt_t len;
4903
4904         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
4905
4906         if (start) {
4907                 distance = _drags->current_pointer_x() - grab_x();
4908                 len = ar->fade_in()->back()->when;
4909         } else {
4910                 distance = grab_x() - _drags->current_pointer_x();
4911                 len = ar->fade_out()->back()->when;
4912         }
4913
4914         /* how long should it be ? */
4915
4916         new_length = len + _editor->unit_to_frame (distance);
4917
4918         /* now check with the region that this is legal */
4919
4920         new_length = ar->verify_xfade_bounds (new_length, start);
4921
4922         if (start) {
4923                 arv->redraw_start_xfade_to (ar, new_length);
4924         } else {
4925                 arv->redraw_end_xfade_to (ar, new_length);
4926         }
4927 }
4928
4929 void
4930 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
4931 {
4932         double distance;
4933         double new_length;
4934         framecnt_t len;
4935
4936         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
4937
4938         if (start) {
4939                 distance = _drags->current_pointer_x() - grab_x();
4940                 len = ar->fade_in()->back()->when;
4941         } else {
4942                 distance = grab_x() - _drags->current_pointer_x();
4943                 len = ar->fade_out()->back()->when;
4944         }
4945
4946         new_length = ar->verify_xfade_bounds (len + _editor->unit_to_frame (distance), start);
4947         
4948         _editor->begin_reversible_command ("xfade trim");
4949         ar->playlist()->clear_owned_changes (); 
4950
4951         if (start) {
4952                 ar->set_fade_in_length (new_length);
4953         } else {
4954                 ar->set_fade_out_length (new_length);
4955         }
4956
4957         /* Adjusting the xfade may affect other regions in the playlist, so we need
4958            to get undo Commands from the whole playlist rather than just the
4959            region.
4960         */
4961
4962         vector<Command*> cmds;
4963         ar->playlist()->rdiff (cmds);
4964         _editor->session()->add_commands (cmds);
4965         _editor->commit_reversible_command ();
4966
4967 }
4968
4969 void
4970 CrossfadeEdgeDrag::aborted (bool)
4971 {
4972         if (start) {
4973                 arv->redraw_start_xfade ();
4974         } else {
4975                 arv->redraw_end_xfade ();
4976         }
4977 }
4978