gtk2_ardour/editor_drag.cc

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