gtk2_ardour/editor_drag.cc

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