fix up wscript/build issues in exportvis after merge with master
[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 () < rb->route()->order_key ();
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(_startdrag_video_offset+dt) - _startdrag_video_offset;
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                 /* This is asynchronous so it will be sent "now"
2375                  */
2376                 s->send_mmc_locate (f);
2377                 /* These are synchronous and will be sent during the next
2378                    process cycle
2379                 */
2380                 s->queue_full_time_code ();
2381                 s->queue_song_position_pointer ();
2382         }
2383
2384         show_verbose_cursor_time (t);
2385         _editor->UpdateAllTransportClocks (t);
2386 }
2387
2388 void
2389 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
2390 {
2391         Drag::start_grab (event, c);
2392
2393         _grab_zoom = _editor->frames_per_unit;
2394
2395         framepos_t where = _editor->event_frame (event, 0, 0);
2396         _editor->snap_to_with_modifier (where, event);
2397
2398         _editor->_dragging_playhead = true;
2399
2400         Session* s = _editor->session ();
2401
2402         if (s) {
2403                 if (_was_rolling && _stop) {
2404                         s->request_stop ();
2405                 }
2406
2407                 if (s->is_auditioning()) {
2408                         s->cancel_audition ();
2409                 }
2410
2411
2412                 if (AudioEngine::instance()->connected()) {
2413                         
2414                         /* do this only if we're the engine is connected
2415                          * because otherwise this request will never be
2416                          * serviced and we'll busy wait forever. likewise,
2417                          * notice if we are disconnected while waiting for the
2418                          * request to be serviced.
2419                          */
2420
2421                         s->request_suspend_timecode_transmission ();
2422                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
2423                                 /* twiddle our thumbs */
2424                         }
2425                 }
2426         }
2427
2428         fake_locate (where);
2429 }
2430
2431 void
2432 CursorDrag::motion (GdkEvent* event, bool)
2433 {
2434         framepos_t const adjusted_frame = adjusted_current_frame (event);
2435         if (adjusted_frame != last_pointer_frame()) {
2436                 fake_locate (adjusted_frame);
2437 #ifdef GTKOSX
2438                 _editor->update_canvas_now ();
2439 #endif
2440         }
2441 }
2442
2443 void
2444 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
2445 {
2446         _editor->_dragging_playhead = false;
2447
2448         if (!movement_occurred && _stop) {
2449                 return;
2450         }
2451
2452         motion (event, false);
2453
2454         Session* s = _editor->session ();
2455         if (s) {
2456                 s->request_locate (_editor->playhead_cursor->current_frame, _was_rolling);
2457                 _editor->_pending_locate_request = true;
2458                 s->request_resume_timecode_transmission ();
2459         }
2460 }
2461
2462 void
2463 CursorDrag::aborted (bool)
2464 {
2465         if (_editor->_dragging_playhead) {
2466                 _editor->session()->request_resume_timecode_transmission ();
2467                 _editor->_dragging_playhead = false;
2468         }
2469
2470         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
2471 }
2472
2473 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2474         : RegionDrag (e, i, p, v)
2475 {
2476         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
2477 }
2478
2479 void
2480 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2481 {
2482         Drag::start_grab (event, cursor);
2483
2484         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2485         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
2486
2487         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
2488 }
2489
2490 void
2491 FadeInDrag::setup_pointer_frame_offset ()
2492 {
2493         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2494         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
2495         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
2496 }
2497
2498 void
2499 FadeInDrag::motion (GdkEvent* event, bool)
2500 {
2501         framecnt_t fade_length;
2502
2503         framepos_t const pos = adjusted_current_frame (event);
2504
2505         boost::shared_ptr<Region> region = _primary->region ();
2506
2507         if (pos < (region->position() + 64)) {
2508                 fade_length = 64; // this should be a minimum defined somewhere
2509         } else if (pos > region->last_frame()) {
2510                 fade_length = region->length();
2511         } else {
2512                 fade_length = pos - region->position();
2513         }
2514
2515         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2516
2517                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2518
2519                 if (!tmp) {
2520                         continue;
2521                 }
2522
2523                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
2524         }
2525
2526         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
2527 }
2528
2529 void
2530 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
2531 {
2532         if (!movement_occurred) {
2533                 return;
2534         }
2535
2536         framecnt_t fade_length;
2537
2538         framepos_t const pos = adjusted_current_frame (event);
2539
2540         boost::shared_ptr<Region> region = _primary->region ();
2541
2542         if (pos < (region->position() + 64)) {
2543                 fade_length = 64; // this should be a minimum defined somewhere
2544         } else if (pos > region->last_frame()) {
2545                 fade_length = region->length();
2546         } else {
2547                 fade_length = pos - region->position();
2548         }
2549
2550         _editor->begin_reversible_command (_("change fade in length"));
2551
2552         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2553
2554                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2555
2556                 if (!tmp) {
2557                         continue;
2558                 }
2559
2560                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
2561                 XMLNode &before = alist->get_state();
2562
2563                 tmp->audio_region()->set_fade_in_length (fade_length);
2564                 tmp->audio_region()->set_fade_in_active (true);
2565
2566                 XMLNode &after = alist->get_state();
2567                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2568         }
2569
2570         _editor->commit_reversible_command ();
2571 }
2572
2573 void
2574 FadeInDrag::aborted (bool)
2575 {
2576         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2577                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2578
2579                 if (!tmp) {
2580                         continue;
2581                 }
2582
2583                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
2584         }
2585 }
2586
2587 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2588         : RegionDrag (e, i, p, v)
2589 {
2590         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
2591 }
2592
2593 void
2594 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2595 {
2596         Drag::start_grab (event, cursor);
2597
2598         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2599         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
2600
2601         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
2602 }
2603
2604 void
2605 FadeOutDrag::setup_pointer_frame_offset ()
2606 {
2607         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
2608         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
2609         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
2610 }
2611
2612 void
2613 FadeOutDrag::motion (GdkEvent* event, bool)
2614 {
2615         framecnt_t fade_length;
2616
2617         framepos_t const pos = adjusted_current_frame (event);
2618
2619         boost::shared_ptr<Region> region = _primary->region ();
2620
2621         if (pos > (region->last_frame() - 64)) {
2622                 fade_length = 64; // this should really be a minimum fade defined somewhere
2623         }
2624         else if (pos < region->position()) {
2625                 fade_length = region->length();
2626         }
2627         else {
2628                 fade_length = region->last_frame() - pos;
2629         }
2630
2631         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2632
2633                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2634
2635                 if (!tmp) {
2636                         continue;
2637                 }
2638
2639                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
2640         }
2641
2642         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
2643 }
2644
2645 void
2646 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
2647 {
2648         if (!movement_occurred) {
2649                 return;
2650         }
2651
2652         framecnt_t fade_length;
2653
2654         framepos_t const pos = adjusted_current_frame (event);
2655
2656         boost::shared_ptr<Region> region = _primary->region ();
2657
2658         if (pos > (region->last_frame() - 64)) {
2659                 fade_length = 64; // this should really be a minimum fade defined somewhere
2660         }
2661         else if (pos < region->position()) {
2662                 fade_length = region->length();
2663         }
2664         else {
2665                 fade_length = region->last_frame() - pos;
2666         }
2667
2668         _editor->begin_reversible_command (_("change fade out length"));
2669
2670         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2671
2672                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2673
2674                 if (!tmp) {
2675                         continue;
2676                 }
2677
2678                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
2679                 XMLNode &before = alist->get_state();
2680
2681                 tmp->audio_region()->set_fade_out_length (fade_length);
2682                 tmp->audio_region()->set_fade_out_active (true);
2683
2684                 XMLNode &after = alist->get_state();
2685                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2686         }
2687
2688         _editor->commit_reversible_command ();
2689 }
2690
2691 void
2692 FadeOutDrag::aborted (bool)
2693 {
2694         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2695                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2696
2697                 if (!tmp) {
2698                         continue;
2699                 }
2700
2701                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
2702         }
2703 }
2704
2705 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
2706         : Drag (e, i)
2707 {
2708         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
2709
2710         _marker = reinterpret_cast<Marker*> (_item->get_data ("marker"));
2711         assert (_marker);
2712
2713         _points.push_back (Gnome::Art::Point (0, 0));
2714         _points.push_back (Gnome::Art::Point (0, physical_screen_height (_editor->get_window())));
2715 }
2716
2717 MarkerDrag::~MarkerDrag ()
2718 {
2719         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
2720                 delete i->location;
2721         }
2722 }
2723
2724 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, Marker* m)
2725 {
2726         location = new Location (*l);
2727         markers.push_back (m);
2728         move_both = false;
2729 }
2730
2731 void
2732 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2733 {
2734         Drag::start_grab (event, cursor);
2735
2736         bool is_start;
2737
2738         Location *location = _editor->find_location_from_marker (_marker, is_start);
2739         _editor->_dragging_edit_point = true;
2740
2741         update_item (location);
2742
2743         // _drag_line->show();
2744         // _line->raise_to_top();
2745
2746         if (is_start) {
2747                 show_verbose_cursor_time (location->start());
2748         } else {
2749                 show_verbose_cursor_time (location->end());
2750         }
2751
2752         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2753
2754         switch (op) {
2755         case Selection::Toggle:
2756                 /* we toggle on the button release */
2757                 break;
2758         case Selection::Set:
2759                 if (!_editor->selection->selected (_marker)) {
2760                         _editor->selection->set (_marker);
2761                 }
2762                 break;
2763         case Selection::Extend:
2764         {
2765                 Locations::LocationList ll;
2766                 list<Marker*> to_add;
2767                 framepos_t s, e;
2768                 _editor->selection->markers.range (s, e);
2769                 s = min (_marker->position(), s);
2770                 e = max (_marker->position(), e);
2771                 s = min (s, e);
2772                 e = max (s, e);
2773                 if (e < max_framepos) {
2774                         ++e;
2775                 }
2776                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
2777                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
2778                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
2779                         if (lm) {
2780                                 if (lm->start) {
2781                                         to_add.push_back (lm->start);
2782                                 }
2783                                 if (lm->end) {
2784                                         to_add.push_back (lm->end);
2785                                 }
2786                         }
2787                 }
2788                 if (!to_add.empty()) {
2789                         _editor->selection->add (to_add);
2790                 }
2791                 break;
2792         }
2793         case Selection::Add:
2794                 _editor->selection->add (_marker);
2795                 break;
2796         }
2797
2798         /* Set up copies for us to manipulate during the drag 
2799          */
2800
2801         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
2802
2803                 Location* l = _editor->find_location_from_marker (*i, is_start);
2804
2805                 if (!l) {
2806                         continue;
2807                 }
2808
2809                 if (l->is_mark()) {
2810                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
2811                 } else {
2812                         /* range: check that the other end of the range isn't
2813                            already there.
2814                         */
2815                         CopiedLocationInfo::iterator x;
2816                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2817                                 if (*(*x).location == *l) {
2818                                         break;
2819                                 }
2820                         }
2821                         if (x == _copied_locations.end()) {
2822                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
2823                         } else {
2824                                 (*x).markers.push_back (*i);
2825                                 (*x).move_both = true;
2826                         }
2827                 }
2828                         
2829         }
2830 }
2831
2832 void
2833 MarkerDrag::setup_pointer_frame_offset ()
2834 {
2835         bool is_start;
2836         Location *location = _editor->find_location_from_marker (_marker, is_start);
2837         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
2838 }
2839
2840 void
2841 MarkerDrag::motion (GdkEvent* event, bool)
2842 {
2843         framecnt_t f_delta = 0;
2844         bool is_start;
2845         bool move_both = false;
2846         Location *real_location;
2847         Location *copy_location = 0;
2848
2849         framepos_t const newframe = adjusted_current_frame (event);
2850         framepos_t next = newframe;
2851
2852         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
2853                 move_both = true;
2854         }
2855
2856         CopiedLocationInfo::iterator x;
2857
2858         /* find the marker we're dragging, and compute the delta */
2859
2860         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2861
2862                 copy_location = (*x).location;
2863
2864                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
2865
2866                         /* this marker is represented by this
2867                          * CopiedLocationMarkerInfo 
2868                          */
2869
2870                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
2871                                 /* que pasa ?? */
2872                                 return;
2873                         }
2874
2875                         if (real_location->is_mark()) {
2876                                 f_delta = newframe - copy_location->start();
2877                         } else {
2878
2879
2880                                 switch (_marker->type()) {
2881                                 case Marker::SessionStart:
2882                                 case Marker::RangeStart:
2883                                 case Marker::LoopStart:
2884                                 case Marker::PunchIn:
2885                                         f_delta = newframe - copy_location->start();
2886                                         break;
2887
2888                                 case Marker::SessionEnd:
2889                                 case Marker::RangeEnd:
2890                                 case Marker::LoopEnd:
2891                                 case Marker::PunchOut:
2892                                         f_delta = newframe - copy_location->end();
2893                                         break;
2894                                 default:
2895                                         /* what kind of marker is this ? */
2896                                         return;
2897                                 }
2898                         }
2899
2900                         break;
2901                 }
2902         }
2903
2904         if (x == _copied_locations.end()) {
2905                 /* hmm, impossible - we didn't find the dragged marker */
2906                 return;
2907         }
2908
2909         /* now move them all */
2910
2911         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
2912
2913                 copy_location = x->location;
2914
2915                 /* call this to find out if its the start or end */
2916
2917                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
2918                         continue;
2919                 }
2920
2921                 if (real_location->locked()) {
2922                         continue;
2923                 }
2924
2925                 if (copy_location->is_mark()) {
2926
2927                         /* now move it */
2928
2929                         copy_location->set_start (copy_location->start() + f_delta);
2930
2931                 } else {
2932                         
2933                         framepos_t new_start = copy_location->start() + f_delta;
2934                         framepos_t new_end = copy_location->end() + f_delta;
2935                         
2936                         if (is_start) { // start-of-range marker
2937                                 
2938                                 if (move_both || (*x).move_both) {
2939                                         copy_location->set_start (new_start);
2940                                         copy_location->set_end (new_end);
2941                                 } else  if (new_start < copy_location->end()) {
2942                                         copy_location->set_start (new_start);
2943                                 } else if (newframe > 0) {
2944                                         _editor->snap_to (next, 1, true);
2945                                         copy_location->set_end (next);
2946                                         copy_location->set_start (newframe);
2947                                 }
2948
2949                         } else { // end marker
2950
2951                                 if (move_both || (*x).move_both) {
2952                                         copy_location->set_end (new_end);
2953                                         copy_location->set_start (new_start);
2954                                 } else if (new_end > copy_location->start()) {
2955                                         copy_location->set_end (new_end);
2956                                 } else if (newframe > 0) {
2957                                         _editor->snap_to (next, -1, true);
2958                                         copy_location->set_start (next);
2959                                         copy_location->set_end (newframe);
2960                                 }
2961                         }
2962                 }
2963
2964                 update_item (copy_location);
2965                 
2966                 /* now lookup the actual GUI items used to display this
2967                  * location and move them to wherever the copy of the location
2968                  * is now. This means that the logic in ARDOUR::Location is
2969                  * still enforced, even though we are not (yet) modifying 
2970                  * the real Location itself.
2971                  */
2972                 
2973                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
2974
2975                 if (lm) {
2976                         lm->set_position (copy_location->start(), copy_location->end());
2977                 }
2978
2979         }
2980
2981         assert (!_copied_locations.empty());
2982
2983         show_verbose_cursor_time (newframe);
2984
2985 #ifdef GTKOSX
2986         _editor->update_canvas_now ();
2987 #endif
2988 }
2989
2990 void
2991 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2992 {
2993         if (!movement_occurred) {
2994
2995                 /* just a click, do nothing but finish
2996                    off the selection process
2997                 */
2998
2999                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3000
3001                 switch (op) {
3002                 case Selection::Set:
3003                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
3004                                 _editor->selection->set (_marker);
3005                         }
3006                         break;
3007
3008                 case Selection::Toggle:
3009                         /* we toggle on the button release, click only */
3010                         _editor->selection->toggle (_marker);
3011                         break;
3012
3013                 case Selection::Extend:
3014                 case Selection::Add:
3015                         break;
3016                 }
3017
3018                 return;
3019         }
3020
3021         _editor->_dragging_edit_point = false;
3022
3023         _editor->begin_reversible_command ( _("move marker") );
3024         XMLNode &before = _editor->session()->locations()->get_state();
3025
3026         MarkerSelection::iterator i;
3027         CopiedLocationInfo::iterator x;
3028         bool is_start;
3029
3030         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
3031              x != _copied_locations.end() && i != _editor->selection->markers.end();
3032              ++i, ++x) {
3033
3034                 Location * location = _editor->find_location_from_marker (*i, is_start);
3035
3036                 if (location) {
3037
3038                         if (location->locked()) {
3039                                 return;
3040                         }
3041
3042                         if (location->is_mark()) {
3043                                 location->set_start (((*x).location)->start());
3044                         } else {
3045                                 location->set (((*x).location)->start(), ((*x).location)->end());
3046                         }
3047                 }
3048         }
3049
3050         XMLNode &after = _editor->session()->locations()->get_state();
3051         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
3052         _editor->commit_reversible_command ();
3053 }
3054
3055 void
3056 MarkerDrag::aborted (bool)
3057 {
3058         /* XXX: TODO */
3059 }
3060
3061 void
3062 MarkerDrag::update_item (Location*)
3063 {
3064         /* noop */
3065 }
3066
3067 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
3068         : Drag (e, i),
3069           _cumulative_x_drag (0),
3070           _cumulative_y_drag (0)
3071 {
3072         if (_zero_gain_fraction < 0.0) {
3073                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
3074         }
3075
3076         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
3077
3078         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
3079         assert (_point);
3080 }
3081
3082
3083 void
3084 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3085 {
3086         Drag::start_grab (event, _editor->cursors()->fader);
3087
3088         // start the grab at the center of the control point so
3089         // the point doesn't 'jump' to the mouse after the first drag
3090         _fixed_grab_x = _point->get_x();
3091         _fixed_grab_y = _point->get_y();
3092
3093         float const fraction = 1 - (_point->get_y() / _point->line().height());
3094
3095         _point->line().start_drag_single (_point, _fixed_grab_x, fraction);
3096
3097         _editor->verbose_cursor()->set (_point->line().get_verbose_cursor_string (fraction),
3098                                         event->button.x + 10, event->button.y + 10);
3099
3100         _editor->verbose_cursor()->show ();
3101
3102         _pushing = Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier);
3103
3104         if (!_point->can_slide ()) {
3105                 _x_constrained = true;
3106         }
3107 }
3108
3109 void
3110 ControlPointDrag::motion (GdkEvent* event, bool)
3111 {
3112         double dx = _drags->current_pointer_x() - last_pointer_x();
3113         double dy = _drags->current_pointer_y() - last_pointer_y();
3114
3115         if (event->button.state & Keyboard::SecondaryModifier) {
3116                 dx *= 0.1;
3117                 dy *= 0.1;
3118         }
3119
3120         /* coordinate in pixels relative to the start of the region (for region-based automation)
3121            or track (for track-based automation) */
3122         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
3123         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
3124
3125         // calculate zero crossing point. back off by .01 to stay on the
3126         // positive side of zero
3127         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
3128
3129         // make sure we hit zero when passing through
3130         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
3131                 cy = zero_gain_y;
3132         }
3133
3134         if (_x_constrained) {
3135                 cx = _fixed_grab_x;
3136         }
3137         if (_y_constrained) {
3138                 cy = _fixed_grab_y;
3139         }
3140
3141         _cumulative_x_drag = cx - _fixed_grab_x;
3142         _cumulative_y_drag = cy - _fixed_grab_y;
3143
3144         cx = max (0.0, cx);
3145         cy = max (0.0, cy);
3146         cy = min ((double) _point->line().height(), cy);
3147
3148         framepos_t cx_frames = _editor->unit_to_frame (cx);
3149
3150         if (!_x_constrained) {
3151                 _editor->snap_to_with_modifier (cx_frames, event);
3152         }
3153
3154         cx_frames = min (cx_frames, _point->line().maximum_time());
3155
3156         float const fraction = 1.0 - (cy / _point->line().height());
3157
3158         _point->line().drag_motion (_editor->frame_to_unit_unrounded (cx_frames), fraction, false, _pushing, _final_index);
3159
3160         _editor->verbose_cursor()->set_text (_point->line().get_verbose_cursor_string (fraction));
3161 }
3162
3163 void
3164 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
3165 {
3166         if (!movement_occurred) {
3167
3168                 /* just a click */
3169
3170                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3171                         _editor->reset_point_selection ();
3172                 }
3173
3174         } else {
3175                 motion (event, false);
3176         }
3177
3178         _point->line().end_drag (_pushing, _final_index);
3179         _editor->session()->commit_reversible_command ();
3180 }
3181
3182 void
3183 ControlPointDrag::aborted (bool)
3184 {
3185         _point->line().reset ();
3186 }
3187
3188 bool
3189 ControlPointDrag::active (Editing::MouseMode m)
3190 {
3191         if (m == Editing::MouseGain) {
3192                 /* always active in mouse gain */
3193                 return true;
3194         }
3195
3196         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
3197         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
3198 }
3199
3200 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
3201         : Drag (e, i),
3202           _line (0),
3203           _cumulative_y_drag (0)
3204 {
3205         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
3206 }
3207
3208 void
3209 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3210 {
3211         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
3212         assert (_line);
3213
3214         _item = &_line->grab_item ();
3215
3216         /* need to get x coordinate in terms of parent (TimeAxisItemView)
3217            origin, and ditto for y.
3218         */
3219
3220         double cx = event->button.x;
3221         double cy = event->button.y;
3222
3223         _line->parent_group().w2i (cx, cy);
3224
3225         framecnt_t const frame_within_region = (framecnt_t) floor (cx * _editor->frames_per_unit);
3226
3227         uint32_t before;
3228         uint32_t after;
3229
3230         if (!_line->control_points_adjacent (frame_within_region, before, after)) {
3231                 /* no adjacent points */
3232                 return;
3233         }
3234
3235         Drag::start_grab (event, _editor->cursors()->fader);
3236
3237         /* store grab start in parent frame */
3238
3239         _fixed_grab_x = cx;
3240         _fixed_grab_y = cy;
3241
3242         double fraction = 1.0 - (cy / _line->height());
3243
3244         _line->start_drag_line (before, after, fraction);
3245
3246         _editor->verbose_cursor()->set (_line->get_verbose_cursor_string (fraction),
3247                                         event->button.x + 10, event->button.y + 10);
3248
3249         _editor->verbose_cursor()->show ();
3250 }
3251
3252 void
3253 LineDrag::motion (GdkEvent* event, bool)
3254 {
3255         double dy = _drags->current_pointer_y() - last_pointer_y();
3256
3257         if (event->button.state & Keyboard::SecondaryModifier) {
3258                 dy *= 0.1;
3259         }
3260
3261         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
3262
3263         _cumulative_y_drag = cy - _fixed_grab_y;
3264
3265         cy = max (0.0, cy);
3266         cy = min ((double) _line->height(), cy);
3267
3268         double const fraction = 1.0 - (cy / _line->height());
3269         uint32_t ignored;
3270
3271         /* we are ignoring x position for this drag, so we can just pass in anything */
3272         _line->drag_motion (0, fraction, true, false, ignored);
3273
3274         _editor->verbose_cursor()->set_text (_line->get_verbose_cursor_string (fraction));
3275 }
3276
3277 void
3278 LineDrag::finished (GdkEvent* event, bool)
3279 {
3280         motion (event, false);
3281         _line->end_drag (false, 0);
3282         _editor->session()->commit_reversible_command ();
3283 }
3284
3285 void
3286 LineDrag::aborted (bool)
3287 {
3288         _line->reset ();
3289 }
3290
3291 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
3292         : Drag (e, i),
3293           _line (0),
3294           _cumulative_x_drag (0)
3295 {
3296         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
3297 }
3298
3299 void
3300 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
3301 {
3302         Drag::start_grab (event);
3303
3304         _line = reinterpret_cast<Line*> (_item);
3305         assert (_line);
3306
3307         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
3308
3309         double cx = event->button.x;
3310         double cy = event->button.y;
3311
3312         _item->property_parent().get_value()->w2i(cx, cy);
3313
3314         /* store grab start in parent frame */
3315         _region_view_grab_x = cx;
3316
3317         _before = *(float*) _item->get_data ("position");
3318
3319         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
3320
3321         _max_x = _editor->frame_to_pixel(_arv->get_duration());
3322 }
3323
3324 void
3325 FeatureLineDrag::motion (GdkEvent*, bool)
3326 {
3327         double dx = _drags->current_pointer_x() - last_pointer_x();
3328
3329         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
3330
3331         _cumulative_x_drag += dx;
3332
3333         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
3334
3335         if (cx > _max_x){
3336                 cx = _max_x;
3337         }
3338         else if(cx < 0){
3339                 cx = 0;
3340         }
3341
3342         ArdourCanvas::Points points;
3343
3344         double x1 = 0, x2 = 0, y1 = 0, y2 = 0;
3345
3346         _line->get_bounds(x1, y2, x2, y2);
3347
3348         points.push_back(Gnome::Art::Point(cx, 2.0)); // first x-coord needs to be a non-normal value
3349         points.push_back(Gnome::Art::Point(cx, y2 - y1));
3350
3351         _line->property_points() = points;
3352
3353         float *pos = new float;
3354         *pos = cx;
3355
3356         _line->set_data ("position", pos);
3357
3358         _before = cx;
3359 }
3360
3361 void
3362 FeatureLineDrag::finished (GdkEvent*, bool)
3363 {
3364         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
3365         _arv->update_transient(_before, _before);
3366 }
3367
3368 void
3369 FeatureLineDrag::aborted (bool)
3370 {
3371         //_line->reset ();
3372 }
3373
3374 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
3375         : Drag (e, i)
3376         , _vertical_only (false)
3377 {
3378         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
3379 }
3380
3381 void
3382 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3383 {
3384         Drag::start_grab (event);
3385         show_verbose_cursor_time (adjusted_current_frame (event));
3386 }
3387
3388 void
3389 RubberbandSelectDrag::motion (GdkEvent* event, bool)
3390 {
3391         framepos_t start;
3392         framepos_t end;
3393         double y1;
3394         double y2;
3395
3396         framepos_t const pf = adjusted_current_frame (event, Config->get_rubberbanding_snaps_to_grid ());
3397
3398         framepos_t grab = grab_frame ();
3399         if (Config->get_rubberbanding_snaps_to_grid ()) {
3400                 _editor->snap_to_with_modifier (grab, event);
3401         }
3402
3403         /* base start and end on initial click position */
3404
3405         if (pf < grab) {
3406                 start = pf;
3407                 end = grab;
3408         } else {
3409                 end = pf;
3410                 start = grab;
3411         }
3412
3413         if (_drags->current_pointer_y() < grab_y()) {
3414                 y1 = _drags->current_pointer_y();
3415                 y2 = grab_y();
3416         } else {
3417                 y2 = _drags->current_pointer_y();
3418                 y1 = grab_y();
3419         }
3420
3421
3422         if (start != end || y1 != y2) {
3423
3424                 double x1 = _editor->frame_to_pixel (start);
3425                 double x2 = _editor->frame_to_pixel (end);
3426
3427                 _editor->rubberband_rect->property_x1() = x1;
3428                 if (_vertical_only) {
3429                         /* fixed 10 pixel width */
3430                         _editor->rubberband_rect->property_x2() = x1 + 10;
3431                 } else {
3432                         _editor->rubberband_rect->property_x2() = x2;
3433                 } 
3434
3435                 _editor->rubberband_rect->property_y1() = y1;
3436                 _editor->rubberband_rect->property_y2() = y2;
3437
3438                 _editor->rubberband_rect->show();
3439                 _editor->rubberband_rect->raise_to_top();
3440
3441                 show_verbose_cursor_time (pf);
3442
3443                 do_select_things (event, true);
3444         }
3445 }
3446
3447 void
3448 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
3449 {
3450         framepos_t x1;
3451         framepos_t x2;
3452         
3453         if (grab_frame() < last_pointer_frame()) {
3454                 x1 = grab_frame ();
3455                 x2 = last_pointer_frame ();
3456         } else {
3457                 x2 = grab_frame ();
3458                 x1 = last_pointer_frame ();
3459         }
3460
3461         double y1;
3462         double y2;
3463         
3464         if (_drags->current_pointer_y() < grab_y()) {
3465                 y1 = _drags->current_pointer_y();
3466                 y2 = grab_y();
3467         } else {
3468                 y2 = _drags->current_pointer_y();
3469                 y1 = grab_y();
3470         }
3471
3472         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
3473 }
3474
3475 void
3476 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
3477 {
3478         if (movement_occurred) {
3479
3480                 motion (event, false);
3481                 do_select_things (event, false);
3482
3483         } else {
3484
3485                 /* just a click */
3486
3487                 bool do_deselect = true;
3488                 MidiTimeAxisView* mtv;
3489
3490                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
3491                         /* MIDI track */
3492                         if (_editor->selection->empty()) {
3493                                 /* nothing selected */
3494                                 add_midi_region (mtv);
3495                                 do_deselect = false;
3496                         }
3497                 } 
3498
3499                 /* do not deselect if Primary or Tertiary (toggle-select or
3500                  * extend-select are pressed.
3501                  */
3502
3503                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) && 
3504                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) && 
3505                     do_deselect) {
3506                         deselect_things ();
3507                 }
3508
3509         }
3510
3511         _editor->rubberband_rect->hide();
3512 }
3513
3514 void
3515 RubberbandSelectDrag::aborted (bool)
3516 {
3517         _editor->rubberband_rect->hide ();
3518 }
3519
3520 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
3521         : RegionDrag (e, i, p, v)
3522 {
3523         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
3524 }
3525
3526 void
3527 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3528 {
3529         Drag::start_grab (event, cursor);
3530
3531         show_verbose_cursor_time (adjusted_current_frame (event));
3532 }
3533
3534 void
3535 TimeFXDrag::motion (GdkEvent* event, bool)
3536 {
3537         RegionView* rv = _primary;
3538         StreamView* cv = rv->get_time_axis_view().view ();
3539
3540         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
3541         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
3542         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
3543
3544         framepos_t const pf = adjusted_current_frame (event);
3545
3546         if (pf > rv->region()->position()) {
3547                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
3548         }
3549
3550         show_verbose_cursor_time (pf);
3551 }
3552
3553 void
3554 TimeFXDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3555 {
3556         _primary->get_time_axis_view().hide_timestretch ();
3557
3558         if (!movement_occurred) {
3559                 return;
3560         }
3561
3562         if (last_pointer_frame() < _primary->region()->position()) {
3563                 /* backwards drag of the left edge - not usable */
3564                 return;
3565         }
3566
3567         framecnt_t newlen = last_pointer_frame() - _primary->region()->position();
3568
3569         float percentage = (double) newlen / (double) _primary->region()->length();
3570
3571 #ifndef USE_RUBBERBAND
3572         // Soundtouch uses percentage / 100 instead of normal (/ 1)
3573         if (_primary->region()->data_type() == DataType::AUDIO) {
3574                 percentage = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
3575         }
3576 #endif
3577
3578         if (!_editor->get_selection().regions.empty()) {
3579                 /* primary will already be included in the selection, and edit
3580                    group shared editing will propagate selection across
3581                    equivalent regions, so just use the current region
3582                    selection.
3583                 */
3584
3585                 if (_editor->time_stretch (_editor->get_selection().regions, percentage) == -1) {
3586                         error << _("An error occurred while executing time stretch operation") << endmsg;
3587                 }
3588         }
3589 }
3590
3591 void
3592 TimeFXDrag::aborted (bool)
3593 {
3594         _primary->get_time_axis_view().hide_timestretch ();
3595 }
3596
3597 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
3598         : Drag (e, i)
3599 {
3600         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
3601 }
3602
3603 void
3604 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3605 {
3606         Drag::start_grab (event);
3607 }
3608
3609 void
3610 ScrubDrag::motion (GdkEvent* /*event*/, bool)
3611 {
3612         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
3613 }
3614
3615 void
3616 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3617 {
3618         if (movement_occurred && _editor->session()) {
3619                 /* make sure we stop */
3620                 _editor->session()->request_transport_speed (0.0);
3621         }
3622 }
3623
3624 void
3625 ScrubDrag::aborted (bool)
3626 {
3627         /* XXX: TODO */
3628 }
3629
3630 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3631         : Drag (e, i)
3632         , _operation (o)
3633         , _add (false)
3634         , _extend (false)
3635         , _original_pointer_time_axis (-1)
3636         , _last_pointer_time_axis (-1)
3637         , _time_selection_at_start (!_editor->get_selection().time.empty())
3638 {
3639         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
3640         
3641         if (_time_selection_at_start) {
3642                 start_at_start = _editor->get_selection().time.start();
3643                 end_at_start = _editor->get_selection().time.end_frame();
3644         }
3645 }
3646
3647 void
3648 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
3649 {
3650         if (_editor->session() == 0) {
3651                 return;
3652         }
3653
3654         Gdk::Cursor* cursor = 0;
3655
3656         switch (_operation) {
3657         case CreateSelection:
3658                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
3659                         _add = true;
3660                 } else {
3661                         _add = false;
3662                 }
3663                 cursor = _editor->cursors()->selector;
3664                 Drag::start_grab (event, cursor);
3665                 break;
3666
3667         case SelectionStartTrim:
3668                 if (_editor->clicked_axisview) {
3669                         _editor->clicked_axisview->order_selection_trims (_item, true);
3670                 }
3671                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
3672                 break;
3673
3674         case SelectionEndTrim:
3675                 if (_editor->clicked_axisview) {
3676                         _editor->clicked_axisview->order_selection_trims (_item, false);
3677                 }
3678                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
3679                 break;
3680
3681         case SelectionMove:
3682                 Drag::start_grab (event, cursor);
3683                 break;
3684
3685         case SelectionExtend:
3686                 Drag::start_grab (event, cursor);
3687                 break;
3688         }
3689
3690         if (_operation == SelectionMove) {
3691                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
3692         } else {
3693                 show_verbose_cursor_time (adjusted_current_frame (event));
3694         }
3695
3696         _original_pointer_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ()).first->order ();
3697 }
3698
3699 void
3700 SelectionDrag::setup_pointer_frame_offset ()
3701 {
3702         switch (_operation) {
3703         case CreateSelection:
3704                 _pointer_frame_offset = 0;
3705                 break;
3706
3707         case SelectionStartTrim:
3708         case SelectionMove:
3709                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
3710                 break;
3711
3712         case SelectionEndTrim:
3713                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
3714                 break;
3715
3716         case SelectionExtend:
3717                 break;
3718         }
3719 }
3720
3721 void
3722 SelectionDrag::motion (GdkEvent* event, bool first_move)
3723 {
3724         framepos_t start = 0;
3725         framepos_t end = 0;
3726         framecnt_t length = 0;
3727         framecnt_t distance = 0;
3728
3729         pair<TimeAxisView*, int> const pending_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ());
3730         if (pending_time_axis.first == 0) {
3731                 return;
3732         }
3733
3734         framepos_t const pending_position = adjusted_current_frame (event);
3735
3736         /* only alter selection if things have changed */
3737
3738         if (pending_time_axis.first->order() == _last_pointer_time_axis && pending_position == last_pointer_frame()) {
3739                 return;
3740         }
3741
3742         switch (_operation) {
3743         case CreateSelection:
3744         {
3745                 framepos_t grab = grab_frame ();
3746
3747                 if (first_move) {
3748                         grab = adjusted_current_frame (event, false);
3749                         if (grab < pending_position) {
3750                                 _editor->snap_to (grab, -1);
3751                         }  else {
3752                                 _editor->snap_to (grab, 1);
3753                         }
3754                 }
3755
3756                 if (pending_position < grab) {
3757                         start = pending_position;
3758                         end = grab;
3759                 } else {
3760                         end = pending_position;
3761                         start = grab;
3762                 }
3763
3764                 /* first drag: Either add to the selection
3765                    or create a new selection
3766                 */
3767
3768                 if (first_move) {
3769
3770                         if (_add) {
3771                                 /* adding to the selection */
3772                                 _editor->set_selected_track_as_side_effect (Selection::Add);
3773                                 //_editor->selection->add (_editor->clicked_axisview);
3774                                 _editor->clicked_selection = _editor->selection->add (start, end);
3775                                 _add = false;
3776                         } else {
3777                                 /* new selection */
3778
3779                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3780                                         //_editor->selection->set (_editor->clicked_axisview);
3781                                         _editor->set_selected_track_as_side_effect (Selection::Set);
3782                                 }
3783
3784                                 _editor->clicked_selection = _editor->selection->set (start, end);
3785                         }
3786                 }
3787
3788                 /* select the track that we're in */
3789                 if (find (_added_time_axes.begin(), _added_time_axes.end(), pending_time_axis.first) == _added_time_axes.end()) {
3790                         // _editor->set_selected_track_as_side_effect (Selection::Add);
3791                         _editor->selection->add (pending_time_axis.first);
3792                         _added_time_axes.push_back (pending_time_axis.first);
3793                 }
3794
3795                 /* deselect any tracks that this drag no longer includes, being careful to only deselect
3796                    tracks that we selected in the first place.
3797                 */
3798
3799                 int min_order = min (_original_pointer_time_axis, pending_time_axis.first->order());
3800                 int max_order = max (_original_pointer_time_axis, pending_time_axis.first->order());
3801
3802                 list<TimeAxisView*>::iterator i = _added_time_axes.begin();
3803                 while (i != _added_time_axes.end()) {
3804
3805                         list<TimeAxisView*>::iterator tmp = i;
3806                         ++tmp;
3807
3808                         if ((*i)->order() < min_order || (*i)->order() > max_order) {
3809                                 _editor->selection->remove (*i);
3810                                 _added_time_axes.remove (*i);
3811                         }
3812
3813                         i = tmp;
3814                 }
3815
3816         }
3817         break;
3818
3819         case SelectionStartTrim:
3820
3821                 start = _editor->selection->time[_editor->clicked_selection].start;
3822                 end = _editor->selection->time[_editor->clicked_selection].end;
3823
3824                 if (pending_position > end) {
3825                         start = end;
3826                 } else {
3827                         start = pending_position;
3828                 }
3829                 break;
3830
3831         case SelectionEndTrim:
3832
3833                 start = _editor->selection->time[_editor->clicked_selection].start;
3834                 end = _editor->selection->time[_editor->clicked_selection].end;
3835
3836                 if (pending_position < start) {
3837                         end = start;
3838                 } else {
3839                         end = pending_position;
3840                 }
3841
3842                 break;
3843                 
3844         case SelectionMove:
3845
3846                 start = _editor->selection->time[_editor->clicked_selection].start;
3847                 end = _editor->selection->time[_editor->clicked_selection].end;
3848
3849                 length = end - start;
3850                 distance = pending_position - start;
3851                 start = pending_position;
3852                 _editor->snap_to (start);
3853
3854                 end = start + length;
3855
3856                 break;
3857
3858         case SelectionExtend:
3859                 break;
3860         }
3861
3862         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3863                 _editor->start_canvas_autoscroll (1, 0);
3864         }
3865
3866         if (start != end) {
3867                 switch (_operation) {
3868                 case SelectionMove:     
3869                         if (_time_selection_at_start) {
3870                                 _editor->selection->move_time (distance);
3871                         }
3872                         break;
3873                 default:
3874                         _editor->selection->replace (_editor->clicked_selection, start, end);
3875                 }
3876         }
3877
3878         if (_operation == SelectionMove) {
3879                 show_verbose_cursor_time(start);
3880         } else {
3881                 show_verbose_cursor_time(pending_position);
3882         }
3883 }
3884
3885 void
3886 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
3887 {
3888         Session* s = _editor->session();
3889
3890         if (movement_occurred) {
3891                 motion (event, false);
3892                 /* XXX this is not object-oriented programming at all. ick */
3893                 if (_editor->selection->time.consolidate()) {
3894                         _editor->selection->TimeChanged ();
3895                 }
3896
3897                 /* XXX what if its a music time selection? */
3898                 if (s) {
3899                         if ( s->get_play_range() && s->transport_rolling() ) {
3900                                 s->request_play_range (&_editor->selection->time, true);
3901                         } else {
3902                                 if (Config->get_always_play_range() && !s->transport_rolling()) {
3903                                         s->request_locate (_editor->get_selection().time.start());
3904                                 }
3905                         }
3906                 }
3907
3908         } else {
3909                 /* just a click, no pointer movement.
3910                  */
3911
3912                 if (_operation == SelectionExtend) {
3913                         if (_time_selection_at_start) {
3914                                 framepos_t pos = adjusted_current_frame (event, false);
3915                                 framepos_t start = min (pos, start_at_start);
3916                                 framepos_t end = max (pos, end_at_start);
3917                                 _editor->selection->set (start, end);
3918                         }
3919                 } else {
3920                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
3921                                 if (_editor->clicked_selection) {
3922                                         _editor->selection->remove (_editor->clicked_selection);
3923                                 }
3924                         } else {
3925                                 if (!_editor->clicked_selection) {
3926                                         _editor->selection->clear_time();
3927                                 }
3928                         }
3929                 }
3930
3931                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3932                         _editor->selection->set (_editor->clicked_axisview);
3933                 }
3934                         
3935                 if (s && s->get_play_range () && s->transport_rolling()) {
3936                         s->request_stop (false, false);
3937                 }
3938
3939         }
3940
3941         _editor->stop_canvas_autoscroll ();
3942         _editor->clicked_selection = 0;
3943 }
3944
3945 void
3946 SelectionDrag::aborted (bool)
3947 {
3948         /* XXX: TODO */
3949 }
3950
3951 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3952         : Drag (e, i),
3953           _operation (o),
3954           _copy (false)
3955 {
3956         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
3957
3958         _drag_rect = new ArdourCanvas::SimpleRect (*_editor->time_line_group, 0.0, 0.0, 0.0,
3959                                                    physical_screen_height (_editor->get_window()));
3960         _drag_rect->hide ();
3961
3962         _drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3963         _drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3964 }
3965
3966 void
3967 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3968 {
3969         if (_editor->session() == 0) {
3970                 return;
3971         }
3972
3973         Gdk::Cursor* cursor = 0;
3974
3975         if (!_editor->temp_location) {
3976                 _editor->temp_location = new Location (*_editor->session());
3977         }
3978
3979         switch (_operation) {
3980         case CreateRangeMarker:
3981         case CreateTransportMarker:
3982         case CreateCDMarker:
3983
3984                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3985                         _copy = true;
3986                 } else {
3987                         _copy = false;
3988                 }
3989                 cursor = _editor->cursors()->selector;
3990                 break;
3991         }
3992
3993         Drag::start_grab (event, cursor);
3994
3995         show_verbose_cursor_time (adjusted_current_frame (event));
3996 }
3997
3998 void
3999 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
4000 {
4001         framepos_t start = 0;
4002         framepos_t end = 0;
4003         ArdourCanvas::SimpleRect *crect;
4004
4005         switch (_operation) {
4006         case CreateRangeMarker:
4007                 crect = _editor->range_bar_drag_rect;
4008                 break;
4009         case CreateTransportMarker:
4010                 crect = _editor->transport_bar_drag_rect;
4011                 break;
4012         case CreateCDMarker:
4013                 crect = _editor->cd_marker_bar_drag_rect;
4014                 break;
4015         default:
4016                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
4017                 return;
4018                 break;
4019         }
4020
4021         framepos_t const pf = adjusted_current_frame (event);
4022
4023         if (_operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
4024                 framepos_t grab = grab_frame ();
4025                 _editor->snap_to (grab);
4026
4027                 if (pf < grab_frame()) {
4028                         start = pf;
4029                         end = grab;
4030                 } else {
4031                         end = pf;
4032                         start = grab;
4033                 }
4034
4035                 /* first drag: Either add to the selection
4036                    or create a new selection.
4037                 */
4038
4039                 if (first_move) {
4040
4041                         _editor->temp_location->set (start, end);
4042
4043                         crect->show ();
4044
4045                         update_item (_editor->temp_location);
4046                         _drag_rect->show();
4047                         //_drag_rect->raise_to_top();
4048
4049                 }
4050         }
4051
4052         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
4053                 _editor->start_canvas_autoscroll (1, 0);
4054         }
4055
4056         if (start != end) {
4057                 _editor->temp_location->set (start, end);
4058
4059                 double x1 = _editor->frame_to_pixel (start);
4060                 double x2 = _editor->frame_to_pixel (end);
4061                 crect->property_x1() = x1;
4062                 crect->property_x2() = x2;
4063
4064                 update_item (_editor->temp_location);
4065         }
4066
4067         show_verbose_cursor_time (pf);
4068
4069 }
4070
4071 void
4072 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
4073 {
4074         Location * newloc = 0;
4075         string rangename;
4076         int flags;
4077
4078         if (movement_occurred) {
4079                 motion (event, false);
4080                 _drag_rect->hide();
4081
4082                 switch (_operation) {
4083                 case CreateRangeMarker:
4084                 case CreateCDMarker:
4085                     {
4086                         _editor->begin_reversible_command (_("new range marker"));
4087                         XMLNode &before = _editor->session()->locations()->get_state();
4088                         _editor->session()->locations()->next_available_name(rangename,"unnamed");
4089                         if (_operation == CreateCDMarker) {
4090                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
4091                                 _editor->cd_marker_bar_drag_rect->hide();
4092                         }
4093                         else {
4094                                 flags = Location::IsRangeMarker;
4095                                 _editor->range_bar_drag_rect->hide();
4096                         }
4097                         newloc = new Location (
4098                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
4099                                 );
4100
4101                         _editor->session()->locations()->add (newloc, true);
4102                         XMLNode &after = _editor->session()->locations()->get_state();
4103                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4104                         _editor->commit_reversible_command ();
4105                         break;
4106                     }
4107
4108                 case CreateTransportMarker:
4109                         // popup menu to pick loop or punch
4110                         _editor->new_transport_marker_context_menu (&event->button, _item);
4111                         break;
4112                 }
4113         } else {
4114                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
4115
4116                 if (Keyboard::no_modifier_keys_pressed (&event->button) && _operation != CreateCDMarker) {
4117
4118                         framepos_t start;
4119                         framepos_t end;
4120
4121                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
4122
4123                         if (end == max_framepos) {
4124                                 end = _editor->session()->current_end_frame ();
4125                         }
4126
4127                         if (start == max_framepos) {
4128                                 start = _editor->session()->current_start_frame ();
4129                         }
4130
4131                         switch (_editor->mouse_mode) {
4132                         case MouseObject:
4133                                 /* find the two markers on either side and then make the selection from it */
4134                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
4135                                 break;
4136
4137                         case MouseRange:
4138                                 /* find the two markers on either side of the click and make the range out of it */
4139                                 _editor->selection->set (start, end);
4140                                 break;
4141
4142                         default:
4143                                 break;
4144                         }
4145                 }
4146         }
4147
4148         _editor->stop_canvas_autoscroll ();
4149 }
4150
4151 void
4152 RangeMarkerBarDrag::aborted (bool)
4153 {
4154         /* XXX: TODO */
4155 }
4156
4157 void
4158 RangeMarkerBarDrag::update_item (Location* location)
4159 {
4160         double const x1 = _editor->frame_to_pixel (location->start());
4161         double const x2 = _editor->frame_to_pixel (location->end());
4162
4163         _drag_rect->property_x1() = x1;
4164         _drag_rect->property_x2() = x2;
4165 }
4166
4167 MouseZoomDrag::MouseZoomDrag (Editor* e, ArdourCanvas::Item* i)
4168         : Drag (e, i)
4169         , _zoom_out (false)
4170 {
4171         DEBUG_TRACE (DEBUG::Drags, "New MouseZoomDrag\n");
4172 }
4173
4174 void
4175 MouseZoomDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4176 {
4177         if (Keyboard::the_keyboard().key_is_down (GDK_Control_L)) {
4178                 Drag::start_grab (event, _editor->cursors()->zoom_out);
4179                 _zoom_out = true;
4180         } else {
4181                 Drag::start_grab (event, _editor->cursors()->zoom_in);
4182                 _zoom_out = false;
4183         }
4184
4185         show_verbose_cursor_time (adjusted_current_frame (event));
4186 }
4187
4188 void
4189 MouseZoomDrag::motion (GdkEvent* event, bool first_move)
4190 {
4191         framepos_t start;
4192         framepos_t end;
4193
4194         framepos_t const pf = adjusted_current_frame (event);
4195
4196         framepos_t grab = grab_frame ();
4197         _editor->snap_to_with_modifier (grab, event);
4198
4199         /* base start and end on initial click position */
4200         if (pf < grab) {
4201                 start = pf;
4202                 end = grab;
4203         } else {
4204                 end = pf;
4205                 start = grab;
4206         }
4207
4208         if (start != end) {
4209
4210                 if (first_move) {
4211                         _editor->zoom_rect->show();
4212                         _editor->zoom_rect->raise_to_top();
4213                 }
4214
4215                 _editor->reposition_zoom_rect(start, end);
4216
4217                 show_verbose_cursor_time (pf);
4218         }
4219 }
4220
4221 void
4222 MouseZoomDrag::finished (GdkEvent* event, bool movement_occurred)
4223 {
4224         if (movement_occurred) {
4225                 motion (event, false);
4226
4227                 if (grab_frame() < last_pointer_frame()) {
4228                         _editor->temporal_zoom_by_frame (grab_frame(), last_pointer_frame());
4229                 } else {
4230                         _editor->temporal_zoom_by_frame (last_pointer_frame(), grab_frame());
4231                 }
4232         } else {
4233                 if (Keyboard::the_keyboard().key_is_down (GDK_Shift_L)) {
4234                         _editor->tav_zoom_step (_zoom_out);
4235                 } else {
4236                         _editor->temporal_zoom_to_frame (_zoom_out, grab_frame());
4237                 }
4238         }
4239
4240         _editor->zoom_rect->hide();
4241 }
4242
4243 void
4244 MouseZoomDrag::aborted (bool)
4245 {
4246         _editor->zoom_rect->hide ();
4247 }
4248
4249 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
4250         : Drag (e, i)
4251         , _cumulative_dx (0)
4252         , _cumulative_dy (0)
4253 {
4254         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
4255
4256         _primary = dynamic_cast<CanvasNoteEvent*> (_item);
4257         _region = &_primary->region_view ();
4258         _note_height = _region->midi_stream_view()->note_height ();
4259 }
4260
4261 void
4262 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4263 {
4264         Drag::start_grab (event);
4265
4266         if (!(_was_selected = _primary->selected())) {
4267
4268                 /* tertiary-click means extend selection - we'll do that on button release,
4269                    so don't add it here, because otherwise we make it hard to figure
4270                    out the "extend-to" range.
4271                 */
4272
4273                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
4274
4275                 if (!extend) {
4276                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
4277
4278                         if (add) {
4279                                 _region->note_selected (_primary, true);
4280                         } else {
4281                                 _region->unique_select (_primary);
4282                         }
4283                 }
4284         }
4285 }
4286
4287 /** @return Current total drag x change in frames */
4288 frameoffset_t
4289 NoteDrag::total_dx () const
4290 {
4291         /* dx in frames */
4292         frameoffset_t const dx = _editor->unit_to_frame (_drags->current_pointer_x() - grab_x());
4293
4294         /* primary note time */
4295         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
4296
4297         /* new time of the primary note in session frames */
4298         frameoffset_t st = n + dx;
4299
4300         framepos_t const rp = _region->region()->position ();
4301
4302         /* prevent the note being dragged earlier than the region's position */
4303         st = max (st, rp);
4304
4305         /* snap and return corresponding delta */
4306         return _region->snap_frame_to_frame (st - rp) + rp - n;
4307 }
4308
4309 /** @return Current total drag y change in note number */
4310 int8_t
4311 NoteDrag::total_dy () const
4312 {
4313         MidiStreamView* msv = _region->midi_stream_view ();
4314         double const y = _region->midi_view()->y_position ();
4315         /* new current note */
4316         uint8_t n = msv->y_to_note (_drags->current_pointer_y () - y);
4317         /* clamp */
4318         n = max (msv->lowest_note(), n);
4319         n = min (msv->highest_note(), n);
4320         /* and work out delta */
4321         return n - msv->y_to_note (grab_y() - y);
4322 }
4323
4324 void
4325 NoteDrag::motion (GdkEvent *, bool)
4326 {
4327         /* Total change in x and y since the start of the drag */
4328         frameoffset_t const dx = total_dx ();
4329         int8_t const dy = total_dy ();
4330
4331         /* Now work out what we have to do to the note canvas items to set this new drag delta */
4332         double const tdx = _editor->frame_to_unit (dx) - _cumulative_dx;
4333         double const tdy = -dy * _note_height - _cumulative_dy;
4334
4335         if (tdx || tdy) {
4336                 _cumulative_dx += tdx;
4337                 _cumulative_dy += tdy;
4338
4339                 int8_t note_delta = total_dy();
4340
4341                 _region->move_selection (tdx, tdy, note_delta);
4342
4343                 /* the new note value may be the same as the old one, but we
4344                  * don't know what that means because the selection may have
4345                  * involved more than one note and we might be doing something
4346                  * odd with them. so show the note value anyway, always.
4347                  */
4348
4349                 char buf[12];
4350                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
4351                 
4352                 snprintf (buf, sizeof (buf), "%s (%d)", Evoral::midi_note_name (new_note).c_str(),
4353                           (int) floor (new_note));
4354
4355                 show_verbose_cursor_text (buf);
4356         }
4357 }
4358
4359 void
4360 NoteDrag::finished (GdkEvent* ev, bool moved)
4361 {
4362         if (!moved) {
4363                 /* no motion - select note */
4364                 
4365                 if (_editor->current_mouse_mode() == Editing::MouseObject ||
4366                     _editor->current_mouse_mode() == Editing::MouseDraw) {
4367                         
4368                         if (_was_selected) {
4369                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
4370                                 if (add) {
4371                                         _region->note_deselected (_primary);
4372                                 }
4373                         } else {
4374                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
4375                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
4376
4377                                 if (!extend && !add && _region->selection_size() > 1) {
4378                                         _region->unique_select (_primary);
4379                                 } else if (extend) {
4380                                         _region->note_selected (_primary, true, true);
4381                                 } else {
4382                                         /* it was added during button press */
4383                                 }
4384                         }
4385                 }
4386         } else {
4387                 _region->note_dropped (_primary, total_dx(), total_dy());
4388         }
4389 }
4390
4391 void
4392 NoteDrag::aborted (bool)
4393 {
4394         /* XXX: TODO */
4395 }
4396
4397 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
4398 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
4399         : Drag (editor, atv->base_item ())
4400         , _ranges (r)
4401         , _nothing_to_drag (false)
4402 {
4403         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
4404         y_origin = atv->y_position();
4405         setup (atv->lines ());
4406 }
4407
4408 /** Make an AutomationRangeDrag for region gain lines */
4409 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AudioRegionView* rv, list<AudioRange> const & r)
4410         : Drag (editor, rv->get_canvas_group ())
4411         , _ranges (r)
4412         , _nothing_to_drag (false)
4413 {
4414         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
4415
4416         list<boost::shared_ptr<AutomationLine> > lines;
4417         lines.push_back (rv->get_gain_line ());
4418         y_origin = rv->get_time_axis_view().y_position();
4419         setup (lines);
4420 }
4421
4422 /** @param lines AutomationLines to drag.
4423  *  @param offset Offset from the session start to the points in the AutomationLines.
4424  */
4425 void
4426 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
4427 {
4428         /* find the lines that overlap the ranges being dragged */
4429         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
4430         while (i != lines.end ()) {
4431                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
4432                 ++j;
4433
4434                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
4435
4436                 /* check this range against all the AudioRanges that we are using */
4437                 list<AudioRange>::const_iterator k = _ranges.begin ();
4438                 while (k != _ranges.end()) {
4439                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
4440                                 break;
4441                         }
4442                         ++k;
4443                 }
4444
4445                 /* add it to our list if it overlaps at all */
4446                 if (k != _ranges.end()) {
4447                         Line n;
4448                         n.line = *i;
4449                         n.state = 0;
4450                         n.range = r;
4451                         _lines.push_back (n);
4452                 }
4453
4454                 i = j;
4455         }
4456
4457         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
4458 }
4459
4460 double
4461 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
4462 {
4463         return 1.0 - ((global_y - y_origin) / line->height());
4464 }
4465
4466 void
4467 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4468 {
4469         Drag::start_grab (event, cursor);
4470
4471         /* Get line states before we start changing things */
4472         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4473                 i->state = &i->line->get_state ();
4474                 i->original_fraction = y_fraction (i->line, _drags->current_pointer_y());
4475         }
4476
4477         if (_ranges.empty()) {
4478
4479                 /* No selected time ranges: drag all points */
4480                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4481                         uint32_t const N = i->line->npoints ();
4482                         for (uint32_t j = 0; j < N; ++j) {
4483                                 i->points.push_back (i->line->nth (j));
4484                         }
4485                 }
4486
4487         } else {
4488
4489                 for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
4490
4491                         framecnt_t const half = (i->start + i->end) / 2;
4492
4493                         /* find the line that this audio range starts in */
4494                         list<Line>::iterator j = _lines.begin();
4495                         while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
4496                                 ++j;
4497                         }
4498
4499                         if (j != _lines.end()) {
4500                                 boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
4501
4502                                 /* j is the line that this audio range starts in; fade into it;
4503                                    64 samples length plucked out of thin air.
4504                                 */
4505
4506                                 framepos_t a = i->start + 64;
4507                                 if (a > half) {
4508                                         a = half;
4509                                 }
4510
4511                                 double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
4512                                 double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
4513
4514                                 the_list->add (p, the_list->eval (p));
4515                                 the_list->add (q, the_list->eval (q));
4516                         }
4517
4518                         /* same thing for the end */
4519
4520                         j = _lines.begin();
4521                         while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
4522                                 ++j;
4523                         }
4524
4525                         if (j != _lines.end()) {
4526                                 boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
4527
4528                                 /* j is the line that this audio range starts in; fade out of it;
4529                                    64 samples length plucked out of thin air.
4530                                 */
4531
4532                                 framepos_t b = i->end - 64;
4533                                 if (b < half) {
4534                                         b = half;
4535                                 }
4536
4537                                 double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
4538                                 double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
4539
4540                                 the_list->add (p, the_list->eval (p));
4541                                 the_list->add (q, the_list->eval (q));
4542                         }
4543                 }
4544
4545                 _nothing_to_drag = true;
4546
4547                 /* Find all the points that should be dragged and put them in the relevant
4548                    points lists in the Line structs.
4549                 */
4550
4551                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4552
4553                         uint32_t const N = i->line->npoints ();
4554                         for (uint32_t j = 0; j < N; ++j) {
4555
4556                                 /* here's a control point on this line */
4557                                 ControlPoint* p = i->line->nth (j);
4558                                 double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
4559
4560                                 /* see if it's inside a range */
4561                                 list<AudioRange>::const_iterator k = _ranges.begin ();
4562                                 while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
4563                                         ++k;
4564                                 }
4565
4566                                 if (k != _ranges.end()) {
4567                                         /* dragging this point */
4568                                         _nothing_to_drag = false;
4569                                         i->points.push_back (p);
4570                                 }
4571                         }
4572                 }
4573         }
4574
4575         if (_nothing_to_drag) {
4576                 return;
4577         }
4578
4579         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4580                 i->line->start_drag_multiple (i->points, y_fraction (i->line, _drags->current_pointer_y()), i->state);
4581         }
4582 }
4583
4584 void
4585 AutomationRangeDrag::motion (GdkEvent*, bool /*first_move*/)
4586 {
4587         if (_nothing_to_drag) {
4588                 return;
4589         }
4590
4591         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
4592                 float const f = y_fraction (l->line, _drags->current_pointer_y());
4593                 /* we are ignoring x position for this drag, so we can just pass in anything */
4594                 uint32_t ignored;
4595                 l->line->drag_motion (0, f, true, false, ignored);
4596                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, f));
4597         }
4598 }
4599
4600 void
4601 AutomationRangeDrag::finished (GdkEvent* event, bool)
4602 {
4603         if (_nothing_to_drag) {
4604                 return;
4605         }
4606
4607         motion (event, false);
4608         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4609                 i->line->end_drag (false, 0);
4610         }
4611
4612         _editor->session()->commit_reversible_command ();
4613 }
4614
4615 void
4616 AutomationRangeDrag::aborted (bool)
4617 {
4618         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
4619                 i->line->reset ();
4620         }
4621 }
4622
4623 DraggingView::DraggingView (RegionView* v, RegionDrag* parent)
4624         : view (v)
4625 {
4626         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
4627         layer = v->region()->layer ();
4628         initial_y = v->get_canvas_group()->property_y ();
4629         initial_playlist = v->region()->playlist ();
4630         initial_position = v->region()->position ();
4631         initial_end = v->region()->position () + v->region()->length ();
4632 }
4633
4634 PatchChangeDrag::PatchChangeDrag (Editor* e, CanvasPatchChange* i, MidiRegionView* r)
4635         : Drag (e, i)
4636         , _region_view (r)
4637         , _patch_change (i)
4638         , _cumulative_dx (0)
4639 {
4640         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
4641                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
4642                                                    grab_frame()));
4643 }
4644
4645 void
4646 PatchChangeDrag::motion (GdkEvent* ev, bool)
4647 {
4648         framepos_t f = adjusted_current_frame (ev);
4649         boost::shared_ptr<Region> r = _region_view->region ();
4650         f = max (f, r->position ());
4651         f = min (f, r->last_frame ());
4652
4653         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
4654         double const dxu = _editor->frame_to_unit (dxf); // permitted fx in units
4655         _patch_change->move (dxu - _cumulative_dx, 0);
4656         _cumulative_dx = dxu;
4657 }
4658
4659 void
4660 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
4661 {
4662         if (!movement_occurred) {
4663                 return;
4664         }
4665
4666         boost::shared_ptr<Region> r (_region_view->region ());
4667         framepos_t f = adjusted_current_frame (ev);
4668         f = max (f, r->position ());
4669         f = min (f, r->last_frame ());
4670
4671         _region_view->move_patch_change (
4672                 *_patch_change,
4673                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
4674                 );
4675 }
4676
4677 void
4678 PatchChangeDrag::aborted (bool)
4679 {
4680         _patch_change->move (-_cumulative_dx, 0);
4681 }
4682
4683 void
4684 PatchChangeDrag::setup_pointer_frame_offset ()
4685 {
4686         boost::shared_ptr<Region> region = _region_view->region ();
4687         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
4688 }
4689
4690 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
4691         : RubberbandSelectDrag (e, rv->get_canvas_frame ())
4692         , _region_view (rv)
4693 {
4694
4695 }
4696
4697 void
4698 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
4699 {
4700         framepos_t const p = _region_view->region()->position ();
4701         double const y = _region_view->midi_view()->y_position ();
4702
4703         x1 = max ((framepos_t) 0, x1 - p);
4704         x2 = max ((framepos_t) 0, x2 - p);
4705         y1 = max (0.0, y1 - y);
4706         y2 = max (0.0, y2 - y);
4707         
4708         _region_view->update_drag_selection (
4709                 _editor->frame_to_pixel (x1),
4710                 _editor->frame_to_pixel (x2),
4711                 y1,
4712                 y2,
4713                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
4714                 );
4715 }
4716
4717 void
4718 MidiRubberbandSelectDrag::deselect_things ()
4719 {
4720         /* XXX */
4721 }
4722
4723 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
4724         : RubberbandSelectDrag (e, rv->get_canvas_frame ())
4725         , _region_view (rv)
4726 {
4727         _vertical_only = true;
4728 }
4729
4730 void
4731 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
4732 {
4733         double const y = _region_view->midi_view()->y_position ();
4734
4735         y1 = max (0.0, y1 - y);
4736         y2 = max (0.0, y2 - y);
4737         
4738         _region_view->update_vertical_drag_selection (
4739                 y1,
4740                 y2,
4741                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
4742                 );
4743 }
4744
4745 void
4746 MidiVerticalSelectDrag::deselect_things ()
4747 {
4748         /* XXX */
4749 }
4750
4751 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4752         : RubberbandSelectDrag (e, i)
4753 {
4754
4755 }
4756
4757 void
4758 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
4759 {
4760         if (drag_in_progress) {
4761                 /* We just want to select things at the end of the drag, not during it */
4762                 return;
4763         }
4764         
4765         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
4766         
4767         _editor->begin_reversible_command (_("rubberband selection"));
4768         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
4769         _editor->commit_reversible_command ();
4770 }
4771
4772 void
4773 EditorRubberbandSelectDrag::deselect_things ()
4774 {
4775         if (!getenv("ARDOUR_SAE")) {
4776                 _editor->selection->clear_tracks();
4777         }
4778         _editor->selection->clear_regions();
4779         _editor->selection->clear_points ();
4780         _editor->selection->clear_lines ();
4781 }
4782
4783 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
4784         : Drag (e, i)
4785         , _region_view (rv)
4786         , _drag_rect (0)
4787 {
4788         
4789 }
4790
4791 NoteCreateDrag::~NoteCreateDrag ()
4792 {
4793         delete _drag_rect;
4794 }
4795
4796 framecnt_t
4797 NoteCreateDrag::grid_frames (framepos_t t) const
4798 {
4799         bool success;
4800         Evoral::MusicalTime grid_beats = _editor->get_grid_type_as_beats (success, t);
4801         if (!success) {
4802                 grid_beats = 1;
4803         }
4804
4805         return _region_view->region_beats_to_region_frames (grid_beats);
4806 }
4807
4808 void
4809 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4810 {
4811         Drag::start_grab (event, cursor);
4812                                                  
4813         _drag_rect = new ArdourCanvas::SimpleRect (*_region_view->get_canvas_group ());
4814
4815         framepos_t pf = _drags->current_pointer_frame ();
4816         framecnt_t const g = grid_frames (pf);
4817
4818         /* Hack so that we always snap to the note that we are over, instead of snapping
4819            to the next one if we're more than halfway through the one we're over.
4820         */
4821         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
4822                 pf -= g / 2;
4823         }
4824
4825         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
4826
4827         MidiStreamView* sv = _region_view->midi_stream_view ();
4828         double const x = _editor->frame_to_pixel (_note[0]);
4829         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
4830
4831         _drag_rect->property_x1() = x;
4832         _drag_rect->property_y1() = y;
4833         _drag_rect->property_x2() = x;
4834         _drag_rect->property_y2() = y + floor (_region_view->midi_stream_view()->note_height ());
4835
4836         _drag_rect->property_outline_what() = 0xff;
4837         _drag_rect->property_outline_color_rgba() = 0xffffff99;
4838         _drag_rect->property_fill_color_rgba()    = 0xffffff66;
4839 }
4840
4841 void
4842 NoteCreateDrag::motion (GdkEvent* event, bool)
4843 {
4844         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
4845         double const x = _editor->frame_to_pixel (_note[1]);
4846         if (_note[1] > _note[0]) {
4847                 _drag_rect->property_x2() = x;
4848         } else {
4849                 _drag_rect->property_x1() = x;
4850         }
4851 }
4852
4853 void
4854 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
4855 {
4856         if (!had_movement) {
4857                 return;
4858         }
4859         
4860         framepos_t const start = min (_note[0], _note[1]);
4861         framecnt_t length = (framecnt_t) fabs (_note[0] - _note[1]);
4862
4863         framecnt_t const g = grid_frames (start);
4864         double const one_tick = 1 / Timecode::BBT_Time::ticks_per_beat;
4865         
4866         if (_editor->snap_mode() == SnapNormal && length < g) {
4867                 length = g - one_tick;
4868         }
4869
4870         double const length_beats = max (one_tick, _region_view->region_frames_to_region_beats (length));
4871
4872         _region_view->create_note_at (start, _drag_rect->property_y1(), length_beats, false);
4873 }
4874
4875 double
4876 NoteCreateDrag::y_to_region (double y) const
4877 {
4878         double x = 0;
4879         _region_view->get_canvas_group()->w2i (x, y);
4880         return y;
4881 }
4882
4883 void
4884 NoteCreateDrag::aborted (bool)
4885 {
4886         
4887 }
4888
4889 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
4890         : Drag (e, i)
4891         , arv (rv)
4892         , start (start_yn)
4893 {
4894         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
4895 }
4896
4897 void
4898 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
4899 {
4900         Drag::start_grab (event, cursor);
4901 }
4902
4903 void
4904 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
4905 {
4906         double distance;
4907         double new_length;
4908         framecnt_t len;
4909
4910         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
4911
4912         if (start) {
4913                 distance = _drags->current_pointer_x() - grab_x();
4914                 len = ar->fade_in()->back()->when;
4915         } else {
4916                 distance = grab_x() - _drags->current_pointer_x();
4917                 len = ar->fade_out()->back()->when;
4918         }
4919
4920         /* how long should it be ? */
4921
4922         new_length = len + _editor->unit_to_frame (distance);
4923
4924         /* now check with the region that this is legal */
4925
4926         new_length = ar->verify_xfade_bounds (new_length, start);
4927
4928         if (start) {
4929                 arv->redraw_start_xfade_to (ar, new_length);
4930         } else {
4931                 arv->redraw_end_xfade_to (ar, new_length);
4932         }
4933 }
4934
4935 void
4936 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
4937 {
4938         double distance;
4939         double new_length;
4940         framecnt_t len;
4941
4942         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
4943
4944         if (start) {
4945                 distance = _drags->current_pointer_x() - grab_x();
4946                 len = ar->fade_in()->back()->when;
4947         } else {
4948                 distance = grab_x() - _drags->current_pointer_x();
4949                 len = ar->fade_out()->back()->when;
4950         }
4951
4952         new_length = ar->verify_xfade_bounds (len + _editor->unit_to_frame (distance), start);
4953         
4954         _editor->begin_reversible_command ("xfade trim");
4955         ar->playlist()->clear_owned_changes (); 
4956
4957         if (start) {
4958                 ar->set_fade_in_length (new_length);
4959         } else {
4960                 ar->set_fade_out_length (new_length);
4961         }
4962
4963         /* Adjusting the xfade may affect other regions in the playlist, so we need
4964            to get undo Commands from the whole playlist rather than just the
4965            region.
4966         */
4967
4968         vector<Command*> cmds;
4969         ar->playlist()->rdiff (cmds);
4970         _editor->session()->add_commands (cmds);
4971         _editor->commit_reversible_command ();
4972
4973 }
4974
4975 void
4976 CrossfadeEdgeDrag::aborted (bool)
4977 {
4978         if (start) {
4979                 arv->redraw_start_xfade ();
4980         } else {
4981                 arv->redraw_end_xfade ();
4982         }
4983 }
4984