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 (first_move) {
3146
3147                 // create a dummy marker to catch events, then hide it.
3148
3149                 char name[64];
3150                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3151
3152                 _marker = new MeterMarker (
3153                         *_editor,
3154                         *_editor->meter_group,
3155                         UIConfiguration::instance().color ("meter marker"),
3156                         name,
3157                         *new MeterSection (_marker->meter())
3158                 );
3159
3160                 /* use the new marker for the grab */
3161                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3162                 _marker->hide();
3163
3164                 TempoMap& map (_editor->session()->tempo_map());
3165                 /* get current state */
3166                 before_state = &map.get_state();
3167
3168                 if (!_copy) {
3169                         _editor->begin_reversible_command (_("move meter mark"));
3170                 } else {
3171                         _editor->begin_reversible_command (_("copy meter mark"));
3172
3173                         Timecode::BBT_Time bbt = _real_section->bbt();
3174
3175                         /* we can't add a meter where one currently exists */
3176                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3177                                 ++bbt.bars;
3178                         } else {
3179                                 --bbt.bars;
3180                         }
3181                         const double beat = map.beat_at_bbt (bbt);
3182                         _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3183                                                        , beat, bbt, map.frame_time (bbt), _real_section->position_lock_style());
3184
3185                 }
3186         }
3187
3188         framepos_t pf = adjusted_current_frame (event);
3189
3190         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3191                 /* never snap to music for audio locked */
3192                 pf = adjusted_current_frame (event, false);
3193         }
3194
3195         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3196
3197         setup_pointer_frame_offset ();
3198         _marker->set_position (pf);
3199         show_verbose_cursor_time (_real_section->frame());
3200 }
3201
3202 void
3203 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3204 {
3205         if (!movement_occurred) {
3206                 if (was_double_click()) {
3207                         _editor->edit_meter_marker (*_marker);
3208                 }
3209                 return;
3210         }
3211
3212         TempoMap& map (_editor->session()->tempo_map());
3213
3214         XMLNode &after = map.get_state();
3215         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3216         _editor->commit_reversible_command ();
3217
3218         // delete the dummy marker we used for visual representation while moving.
3219         // a new visual marker will show up automatically.
3220         delete _marker;
3221 }
3222
3223 void
3224 MeterMarkerDrag::aborted (bool moved)
3225 {
3226         _marker->set_position (_marker->meter().frame ());
3227         if (moved) {
3228                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3229                 // delete the dummy marker we used for visual representation while moving.
3230                 // a new visual marker will show up automatically.
3231                 delete _marker;
3232         }
3233 }
3234
3235 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3236         : Drag (e, i)
3237         , _copy (c)
3238         , before_state (0)
3239 {
3240         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3241
3242         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3243         _real_section = &_marker->tempo();
3244         _movable = _real_section->movable();
3245         assert (_marker);
3246 }
3247
3248 void
3249 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3250 {
3251         Drag::start_grab (event, cursor);
3252         if (!_real_section->active()) {
3253                 show_verbose_cursor_text (_("inactive"));
3254         } else {
3255                 show_verbose_cursor_time (adjusted_current_frame (event));
3256         }
3257 }
3258
3259 void
3260 TempoMarkerDrag::setup_pointer_frame_offset ()
3261 {
3262         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3263 }
3264
3265 void
3266 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3267 {
3268         if (!_real_section->active()) {
3269                 return;
3270         }
3271
3272         if (first_move) {
3273
3274                 // mvc drag - create a dummy marker to catch events, hide it.
3275
3276                 char name[64];
3277                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3278
3279                 TempoSection section (_marker->tempo());
3280
3281                 _marker = new TempoMarker (
3282                         *_editor,
3283                         *_editor->tempo_group,
3284                         UIConfiguration::instance().color ("tempo marker"),
3285                         name,
3286                         *new TempoSection (_marker->tempo())
3287                         );
3288
3289                 /* use the new marker for the grab */
3290                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3291                 _marker->hide();
3292
3293                 TempoMap& map (_editor->session()->tempo_map());
3294                 /* get current state */
3295                 before_state = &map.get_state();
3296                 if (!_copy) {
3297                         _editor->begin_reversible_command (_("move tempo mark"));
3298                 } else {
3299                         _editor->begin_reversible_command (_("copy tempo mark"));
3300                         framepos_t frame;
3301                         bool use_snap = false;
3302
3303                         if (!_editor->snap_musical()) {
3304                                 frame = adjusted_current_frame (event);
3305                         } else {
3306                                 frame = adjusted_current_frame (event, false);
3307                                 if (ArdourKeyboard::indicates_snap (event->button.state)) {
3308                                         if (_editor->snap_mode() == Editing::SnapOff) {
3309                                                 use_snap = true;
3310                                         } else {
3311                                                 use_snap = false;
3312                                         }
3313                                 } else {
3314                                         if (_editor->snap_mode() == Editing::SnapOff) {
3315                                                 use_snap = false;
3316                                         } else {
3317                                                 use_snap = true;
3318                                         }
3319                                 }
3320                         }
3321
3322                         Timecode::BBT_Time bbt;
3323                         map.bbt_time (frame, bbt);
3324
3325                         /* add new tempo section to map, ensuring we don't refer to existing tempos for snap */
3326
3327                         if (_real_section->position_lock_style() == MusicTime) {
3328                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3329                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3330                                 } else if (use_snap) {
3331                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3332                                 }
3333                                 double const pulse = map.predict_tempo_position (_real_section, bbt).first;
3334                                 _real_section = map.add_tempo (_marker->tempo(), pulse, 0, _real_section->type(), MusicTime);
3335                         } else {
3336                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3337                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3338                                 } else if (use_snap) {
3339                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3340                                 }
3341                                 if (use_snap) {
3342                                         frame = map.predict_tempo_position (_real_section, bbt).second;
3343                                 }
3344                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3345                         }
3346                 }
3347
3348         }
3349
3350         framepos_t pf;
3351
3352         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3353                 /* use vertical movement to alter tempo .. should be log */
3354                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3355                 stringstream strs;
3356
3357                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3358                 strs << new_bpm;
3359                 show_verbose_cursor_text (strs.str());
3360
3361         } else if (_movable && !_real_section->locked_to_meter()) {
3362
3363                 if (!_editor->snap_musical()) {
3364                         /* snap normally (this is not self-referential).*/
3365                         pf = adjusted_current_frame (event);
3366
3367                 } else {
3368                         /* but this is.
3369                            we can't use the map for anything related to tempo,
3370                            so we round bbt using meters, which have no dependency
3371                            on pulse for this kind of thing.
3372                         */
3373                         TempoMap& map (_editor->session()->tempo_map());
3374                         Timecode::BBT_Time when;
3375                         bool use_snap;
3376
3377                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
3378                                 if (_editor->snap_mode() == Editing::SnapOff) {
3379                                         use_snap = true;
3380                                 } else {
3381                                         use_snap = false;
3382                                 }
3383                         } else {
3384                                 if (_editor->snap_mode() == Editing::SnapOff) {
3385                                         use_snap = false;
3386                                 } else {
3387                                         use_snap = true;
3388                                 }
3389                         }
3390
3391                         pf = adjusted_current_frame (event);
3392                         map.bbt_time (pf, when);
3393
3394                         if (use_snap && _editor->snap_type() == SnapToBar) {
3395                                 map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3396
3397                         }
3398                         const pair<double, framepos_t> future_pos = map.predict_tempo_position (_real_section, when);
3399                         map.gui_move_tempo (_real_section, future_pos);
3400
3401                 }
3402
3403                 show_verbose_cursor_time (_real_section->frame());
3404         }
3405
3406         /* this has moved the bar lines themselves, so recalibrate the offset */
3407         setup_pointer_frame_offset();
3408
3409         _marker->set_position (pf);
3410 }
3411
3412 void
3413 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3414 {
3415         if (!_real_section->active()) {
3416                 return;
3417         }
3418         if (!movement_occurred) {
3419                 if (was_double_click()) {
3420                         _editor->edit_tempo_marker (*_marker);
3421                 }
3422                 return;
3423         }
3424
3425         TempoMap& map (_editor->session()->tempo_map());
3426
3427         XMLNode &after = map.get_state();
3428         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3429         _editor->commit_reversible_command ();
3430
3431         // delete the dummy marker we used for visual representation while moving.
3432         // a new visual marker will show up automatically.
3433         delete _marker;
3434 }
3435
3436 void
3437 TempoMarkerDrag::aborted (bool moved)
3438 {
3439         _marker->set_position (_marker->tempo().frame());
3440         if (moved) {
3441                 TempoMap& map (_editor->session()->tempo_map());
3442                 map.set_state (*before_state, Stateful::current_state_version);
3443                 // delete the dummy marker we used for visual representation while moving.
3444                 // a new visual marker will show up automatically.
3445                 delete _marker;
3446         }
3447 }
3448
3449 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3450         : Drag (e, i)
3451         , _pulse (0.0)
3452         , _beat (0.0)
3453         , _tempo (0)
3454         , before_state (0)
3455 {
3456         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3457
3458 }
3459
3460 void
3461 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3462 {
3463         Drag::start_grab (event, cursor);
3464
3465         TempoMap& map (_editor->session()->tempo_map());
3466         ostringstream sstr;
3467
3468         _tempo = const_cast<TempoSection*> (&map.tempo_section_at (raw_grab_frame()));
3469         sstr << "^" << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute() << "\n";
3470         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3471         show_verbose_cursor_text (sstr.str());
3472         finished (event, false);
3473 }
3474
3475 void
3476 BBTRulerDrag::setup_pointer_frame_offset ()
3477 {
3478         TempoMap& map (_editor->session()->tempo_map());
3479         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3480         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3481         if (divisions > 0) {
3482                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3483         } else {
3484                 /* while it makes some sense for the user to determine the division to 'grab',
3485                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3486                    and the result over steep tempo curves. Use sixteenths.
3487                 */
3488                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3489         }
3490         _pulse = map.pulse_at_beat (_beat);
3491         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3492 }
3493
3494 void
3495 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3496 {
3497         TempoMap& map (_editor->session()->tempo_map());
3498
3499         if (first_move) {
3500                 /* get current state */
3501                 before_state = &map.get_state();
3502                 _editor->begin_reversible_command (_("dilate tempo"));
3503         }
3504
3505         framepos_t const pf = adjusted_current_frame (event, false);
3506
3507         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3508                 /* adjust previous tempo to match pointer frame */
3509                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3510         }
3511         ostringstream sstr;
3512         sstr << "^" << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute() << "\n";
3513         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3514         show_verbose_cursor_text (sstr.str());
3515 }
3516
3517 void
3518 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3519 {
3520         if (!movement_occurred) {
3521                 return;
3522         }
3523
3524         TempoMap& map (_editor->session()->tempo_map());
3525
3526         XMLNode &after = map.get_state();
3527         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3528         _editor->commit_reversible_command ();
3529 }
3530
3531 void
3532 BBTRulerDrag::aborted (bool moved)
3533 {
3534         if (moved) {
3535                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3536         }
3537 }
3538
3539
3540 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3541         : Drag (e, &c.track_canvas_item(), false)
3542         , _cursor (c)
3543         , _stop (s)
3544         , _grab_zoom (0.0)
3545 {
3546         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3547 }
3548
3549 /** Do all the things we do when dragging the playhead to make it look as though
3550  *  we have located, without actually doing the locate (because that would cause
3551  *  the diskstream buffers to be refilled, which is too slow).
3552  */
3553 void
3554 CursorDrag::fake_locate (framepos_t t)
3555 {
3556         if (_editor->session () == 0) {
3557                 return;
3558         }
3559
3560         _editor->playhead_cursor->set_position (t);
3561
3562         Session* s = _editor->session ();
3563         if (s->timecode_transmission_suspended ()) {
3564                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3565                 /* This is asynchronous so it will be sent "now"
3566                  */
3567                 s->send_mmc_locate (f);
3568                 /* These are synchronous and will be sent during the next
3569                    process cycle
3570                 */
3571                 s->queue_full_time_code ();
3572                 s->queue_song_position_pointer ();
3573         }
3574
3575         show_verbose_cursor_time (t);
3576         _editor->UpdateAllTransportClocks (t);
3577 }
3578
3579 void
3580 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3581 {
3582         Drag::start_grab (event, c);
3583         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3584
3585         _grab_zoom = _editor->samples_per_pixel;
3586
3587         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3588
3589         _editor->snap_to_with_modifier (where, event);
3590
3591         _editor->_dragging_playhead = true;
3592
3593         Session* s = _editor->session ();
3594
3595         /* grab the track canvas item as well */
3596
3597         _cursor.track_canvas_item().grab();
3598
3599         if (s) {
3600                 if (_was_rolling && _stop) {
3601                         s->request_stop ();
3602                 }
3603
3604                 if (s->is_auditioning()) {
3605                         s->cancel_audition ();
3606                 }
3607
3608
3609                 if (AudioEngine::instance()->connected()) {
3610
3611                         /* do this only if we're the engine is connected
3612                          * because otherwise this request will never be
3613                          * serviced and we'll busy wait forever. likewise,
3614                          * notice if we are disconnected while waiting for the
3615                          * request to be serviced.
3616                          */
3617
3618                         s->request_suspend_timecode_transmission ();
3619                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3620                                 /* twiddle our thumbs */
3621                         }
3622                 }
3623         }
3624
3625         fake_locate (where - snap_delta (event->button.state));
3626 }
3627
3628 void
3629 CursorDrag::motion (GdkEvent* event, bool)
3630 {
3631         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3632         _editor->snap_to_with_modifier (where, event);
3633         if (where != last_pointer_frame()) {
3634                 fake_locate (where - snap_delta (event->button.state));
3635         }
3636 }
3637
3638 void
3639 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3640 {
3641         _editor->_dragging_playhead = false;
3642
3643         _cursor.track_canvas_item().ungrab();
3644
3645         if (!movement_occurred && _stop) {
3646                 return;
3647         }
3648
3649         motion (event, false);
3650
3651         Session* s = _editor->session ();
3652         if (s) {
3653                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3654                 _editor->_pending_locate_request = true;
3655                 s->request_resume_timecode_transmission ();
3656         }
3657 }
3658
3659 void
3660 CursorDrag::aborted (bool)
3661 {
3662         _cursor.track_canvas_item().ungrab();
3663
3664         if (_editor->_dragging_playhead) {
3665                 _editor->session()->request_resume_timecode_transmission ();
3666                 _editor->_dragging_playhead = false;
3667         }
3668
3669         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3670 }
3671
3672 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3673         : RegionDrag (e, i, p, v)
3674 {
3675         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3676 }
3677
3678 void
3679 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3680 {
3681         Drag::start_grab (event, cursor);
3682
3683         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3684         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3685         setup_snap_delta (r->position ());
3686
3687         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3688 }
3689
3690 void
3691 FadeInDrag::setup_pointer_frame_offset ()
3692 {
3693         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3694         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3695         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3696 }
3697
3698 void
3699 FadeInDrag::motion (GdkEvent* event, bool)
3700 {
3701         framecnt_t fade_length;
3702
3703         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3704         _editor->snap_to_with_modifier (pos, event);
3705         pos -= snap_delta (event->button.state);
3706
3707         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3708
3709         if (pos < (region->position() + 64)) {
3710                 fade_length = 64; // this should be a minimum defined somewhere
3711         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3712                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3713         } else {
3714                 fade_length = pos - region->position();
3715         }
3716
3717         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3718
3719                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3720
3721                 if (!tmp) {
3722                         continue;
3723                 }
3724
3725                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3726         }
3727
3728         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3729 }
3730
3731 void
3732 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3733 {
3734         if (!movement_occurred) {
3735                 return;
3736         }
3737
3738         framecnt_t fade_length;
3739         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3740         _editor->snap_to_with_modifier (pos, event);
3741         pos -= snap_delta (event->button.state);
3742
3743         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3744
3745         if (pos < (region->position() + 64)) {
3746                 fade_length = 64; // this should be a minimum defined somewhere
3747         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3748                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3749         } else {
3750                 fade_length = pos - region->position();
3751         }
3752
3753         bool in_command = false;
3754
3755         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3756
3757                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3758
3759                 if (!tmp) {
3760                         continue;
3761                 }
3762
3763                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3764                 XMLNode &before = alist->get_state();
3765
3766                 tmp->audio_region()->set_fade_in_length (fade_length);
3767                 tmp->audio_region()->set_fade_in_active (true);
3768
3769                 if (!in_command) {
3770                         _editor->begin_reversible_command (_("change fade in length"));
3771                         in_command = true;
3772                 }
3773                 XMLNode &after = alist->get_state();
3774                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3775         }
3776
3777         if (in_command) {
3778                 _editor->commit_reversible_command ();
3779         }
3780 }
3781
3782 void
3783 FadeInDrag::aborted (bool)
3784 {
3785         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3786                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3787
3788                 if (!tmp) {
3789                         continue;
3790                 }
3791
3792                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3793         }
3794 }
3795
3796 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3797         : RegionDrag (e, i, p, v)
3798 {
3799         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3800 }
3801
3802 void
3803 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3804 {
3805         Drag::start_grab (event, cursor);
3806
3807         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3808         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3809         setup_snap_delta (r->last_frame ());
3810
3811         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3812 }
3813
3814 void
3815 FadeOutDrag::setup_pointer_frame_offset ()
3816 {
3817         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3818         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3819         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3820 }
3821
3822 void
3823 FadeOutDrag::motion (GdkEvent* event, bool)
3824 {
3825         framecnt_t fade_length;
3826
3827         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3828         _editor->snap_to_with_modifier (pos, event);
3829         pos -= snap_delta (event->button.state);
3830
3831         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3832
3833         if (pos > (region->last_frame() - 64)) {
3834                 fade_length = 64; // this should really be a minimum fade defined somewhere
3835         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3836                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3837         } else {
3838                 fade_length = region->last_frame() - pos;
3839         }
3840
3841         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3842
3843                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3844
3845                 if (!tmp) {
3846                         continue;
3847                 }
3848
3849                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3850         }
3851
3852         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3853 }
3854
3855 void
3856 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3857 {
3858         if (!movement_occurred) {
3859                 return;
3860         }
3861
3862         framecnt_t fade_length;
3863
3864         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3865         _editor->snap_to_with_modifier (pos, event);
3866         pos -= snap_delta (event->button.state);
3867
3868         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3869
3870         if (pos > (region->last_frame() - 64)) {
3871                 fade_length = 64; // this should really be a minimum fade defined somewhere
3872         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3873                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3874         } else {
3875                 fade_length = region->last_frame() - pos;
3876         }
3877
3878         bool in_command = false;
3879
3880         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3881
3882                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3883
3884                 if (!tmp) {
3885                         continue;
3886                 }
3887
3888                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3889                 XMLNode &before = alist->get_state();
3890
3891                 tmp->audio_region()->set_fade_out_length (fade_length);
3892                 tmp->audio_region()->set_fade_out_active (true);
3893
3894                 if (!in_command) {
3895                         _editor->begin_reversible_command (_("change fade out length"));
3896                         in_command = true;
3897                 }
3898                 XMLNode &after = alist->get_state();
3899                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3900         }
3901
3902         if (in_command) {
3903                 _editor->commit_reversible_command ();
3904         }
3905 }
3906
3907 void
3908 FadeOutDrag::aborted (bool)
3909 {
3910         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3911                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3912
3913                 if (!tmp) {
3914                         continue;
3915                 }
3916
3917                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3918         }
3919 }
3920
3921 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3922         : Drag (e, i)
3923         , _selection_changed (false)
3924 {
3925         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3926         Gtk::Window* toplevel = _editor->current_toplevel();
3927         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3928
3929         assert (_marker);
3930
3931         _points.push_back (ArdourCanvas::Duple (0, 0));
3932
3933         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3934 }
3935
3936 MarkerDrag::~MarkerDrag ()
3937 {
3938         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3939                 delete i->location;
3940         }
3941 }
3942
3943 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3944 {
3945         location = new Location (*l);
3946         markers.push_back (m);
3947         move_both = false;
3948 }
3949
3950 void
3951 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3952 {
3953         Drag::start_grab (event, cursor);
3954
3955         bool is_start;
3956
3957         Location *location = _editor->find_location_from_marker (_marker, is_start);
3958         _editor->_dragging_edit_point = true;
3959
3960         update_item (location);
3961
3962         // _drag_line->show();
3963         // _line->raise_to_top();
3964
3965         if (is_start) {
3966                 show_verbose_cursor_time (location->start());
3967         } else {
3968                 show_verbose_cursor_time (location->end());
3969         }
3970         setup_snap_delta (is_start ? location->start() : location->end());
3971
3972         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3973
3974         switch (op) {
3975         case Selection::Toggle:
3976                 /* we toggle on the button release */
3977                 break;
3978         case Selection::Set:
3979                 if (!_editor->selection->selected (_marker)) {
3980                         _editor->selection->set (_marker);
3981                         _selection_changed = true;
3982                 }
3983                 break;
3984         case Selection::Extend:
3985         {
3986                 Locations::LocationList ll;
3987                 list<ArdourMarker*> to_add;
3988                 framepos_t s, e;
3989                 _editor->selection->markers.range (s, e);
3990                 s = min (_marker->position(), s);
3991                 e = max (_marker->position(), e);
3992                 s = min (s, e);
3993                 e = max (s, e);
3994                 if (e < max_framepos) {
3995                         ++e;
3996                 }
3997                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3998                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3999                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
4000                         if (lm) {
4001                                 if (lm->start) {
4002                                         to_add.push_back (lm->start);
4003                                 }
4004                                 if (lm->end) {
4005                                         to_add.push_back (lm->end);
4006                                 }
4007                         }
4008                 }
4009                 if (!to_add.empty()) {
4010                         _editor->selection->add (to_add);
4011                         _selection_changed = true;
4012                 }
4013                 break;
4014         }
4015         case Selection::Add:
4016                 _editor->selection->add (_marker);
4017                 _selection_changed = true;
4018
4019                 break;
4020         }
4021
4022         /* Set up copies for us to manipulate during the drag
4023          */
4024
4025         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
4026
4027                 Location* l = _editor->find_location_from_marker (*i, is_start);
4028
4029                 if (!l) {
4030                         continue;
4031                 }
4032
4033                 if (l->is_mark()) {
4034                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4035                 } else {
4036                         /* range: check that the other end of the range isn't
4037                            already there.
4038                         */
4039                         CopiedLocationInfo::iterator x;
4040                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4041                                 if (*(*x).location == *l) {
4042                                         break;
4043                                 }
4044                         }
4045                         if (x == _copied_locations.end()) {
4046                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4047                         } else {
4048                                 (*x).markers.push_back (*i);
4049                                 (*x).move_both = true;
4050                         }
4051                 }
4052
4053         }
4054 }
4055
4056 void
4057 MarkerDrag::setup_pointer_frame_offset ()
4058 {
4059         bool is_start;
4060         Location *location = _editor->find_location_from_marker (_marker, is_start);
4061         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4062 }
4063
4064 void
4065 MarkerDrag::motion (GdkEvent* event, bool)
4066 {
4067         framecnt_t f_delta = 0;
4068         bool is_start;
4069         bool move_both = false;
4070         Location *real_location;
4071         Location *copy_location = 0;
4072         framecnt_t const sd = snap_delta (event->button.state);
4073
4074         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4075         framepos_t next = newframe;
4076
4077         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4078                 move_both = true;
4079         }
4080
4081         CopiedLocationInfo::iterator x;
4082
4083         /* find the marker we're dragging, and compute the delta */
4084
4085         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4086
4087                 copy_location = (*x).location;
4088
4089                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4090
4091                         /* this marker is represented by this
4092                          * CopiedLocationMarkerInfo
4093                          */
4094
4095                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4096                                 /* que pasa ?? */
4097                                 return;
4098                         }
4099
4100                         if (real_location->is_mark()) {
4101                                 f_delta = newframe - copy_location->start();
4102                         } else {
4103
4104
4105                                 switch (_marker->type()) {
4106                                 case ArdourMarker::SessionStart:
4107                                 case ArdourMarker::RangeStart:
4108                                 case ArdourMarker::LoopStart:
4109                                 case ArdourMarker::PunchIn:
4110                                         f_delta = newframe - copy_location->start();
4111                                         break;
4112
4113                                 case ArdourMarker::SessionEnd:
4114                                 case ArdourMarker::RangeEnd:
4115                                 case ArdourMarker::LoopEnd:
4116                                 case ArdourMarker::PunchOut:
4117                                         f_delta = newframe - copy_location->end();
4118                                         break;
4119                                 default:
4120                                         /* what kind of marker is this ? */
4121                                         return;
4122                                 }
4123                         }
4124
4125                         break;
4126                 }
4127         }
4128
4129         if (x == _copied_locations.end()) {
4130                 /* hmm, impossible - we didn't find the dragged marker */
4131                 return;
4132         }
4133
4134         /* now move them all */
4135
4136         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4137
4138                 copy_location = x->location;
4139
4140                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4141                         continue;
4142                 }
4143
4144                 if (real_location->locked()) {
4145                         continue;
4146                 }
4147
4148                 if (copy_location->is_mark()) {
4149
4150                         /* now move it */
4151
4152                         copy_location->set_start (copy_location->start() + f_delta);
4153
4154                 } else {
4155
4156                         framepos_t new_start = copy_location->start() + f_delta;
4157                         framepos_t new_end = copy_location->end() + f_delta;
4158
4159                         if (is_start) { // start-of-range marker
4160
4161                                 if (move_both || (*x).move_both) {
4162                                         copy_location->set_start (new_start);
4163                                         copy_location->set_end (new_end);
4164                                 } else  if (new_start < copy_location->end()) {
4165                                         copy_location->set_start (new_start);
4166                                 } else if (newframe > 0) {
4167                                         //_editor->snap_to (next, RoundUpAlways, true);
4168                                         copy_location->set_end (next);
4169                                         copy_location->set_start (newframe);
4170                                 }
4171
4172                         } else { // end marker
4173
4174                                 if (move_both || (*x).move_both) {
4175                                         copy_location->set_end (new_end);
4176                                         copy_location->set_start (new_start);
4177                                 } else if (new_end > copy_location->start()) {
4178                                         copy_location->set_end (new_end);
4179                                 } else if (newframe > 0) {
4180                                         //_editor->snap_to (next, RoundDownAlways, true);
4181                                         copy_location->set_start (next);
4182                                         copy_location->set_end (newframe);
4183                                 }
4184                         }
4185                 }
4186
4187                 update_item (copy_location);
4188
4189                 /* now lookup the actual GUI items used to display this
4190                  * location and move them to wherever the copy of the location
4191                  * is now. This means that the logic in ARDOUR::Location is
4192                  * still enforced, even though we are not (yet) modifying
4193                  * the real Location itself.
4194                  */
4195
4196                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4197
4198                 if (lm) {
4199                         lm->set_position (copy_location->start(), copy_location->end());
4200                 }
4201
4202         }
4203
4204         assert (!_copied_locations.empty());
4205
4206         show_verbose_cursor_time (newframe);
4207 }
4208
4209 void
4210 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4211 {
4212         if (!movement_occurred) {
4213
4214                 if (was_double_click()) {
4215                         _editor->rename_marker (_marker);
4216                         return;
4217                 }
4218
4219                 /* just a click, do nothing but finish
4220                    off the selection process
4221                 */
4222
4223                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4224                 switch (op) {
4225                 case Selection::Set:
4226                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4227                                 _editor->selection->set (_marker);
4228                                 _selection_changed = true;
4229                         }
4230                         break;
4231
4232                 case Selection::Toggle:
4233                         /* we toggle on the button release, click only */
4234                         _editor->selection->toggle (_marker);
4235                         _selection_changed = true;
4236
4237                         break;
4238
4239                 case Selection::Extend:
4240                 case Selection::Add:
4241                         break;
4242                 }
4243
4244                 if (_selection_changed) {
4245                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4246                         _editor->commit_reversible_selection_op();
4247                 }
4248
4249                 return;
4250         }
4251
4252         _editor->_dragging_edit_point = false;
4253
4254         XMLNode &before = _editor->session()->locations()->get_state();
4255         bool in_command = false;
4256
4257         MarkerSelection::iterator i;
4258         CopiedLocationInfo::iterator x;
4259         bool is_start;
4260
4261         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4262              x != _copied_locations.end() && i != _editor->selection->markers.end();
4263              ++i, ++x) {
4264
4265                 Location * location = _editor->find_location_from_marker (*i, is_start);
4266
4267                 if (location) {
4268
4269                         if (location->locked()) {
4270                                 continue;
4271                         }
4272                         if (!in_command) {
4273                                 _editor->begin_reversible_command ( _("move marker") );
4274                                 in_command = true;
4275                         }
4276                         if (location->is_mark()) {
4277                                 location->set_start (((*x).location)->start());
4278                         } else {
4279                                 location->set (((*x).location)->start(), ((*x).location)->end());
4280                         }
4281                 }
4282         }
4283
4284         if (in_command) {
4285                 XMLNode &after = _editor->session()->locations()->get_state();
4286                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4287                 _editor->commit_reversible_command ();
4288         }
4289 }
4290
4291 void
4292 MarkerDrag::aborted (bool movement_occurred)
4293 {
4294         if (!movement_occurred) {
4295                 return;
4296         }
4297
4298         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4299
4300                 /* move all markers to their original location */
4301
4302
4303                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4304
4305                         bool is_start;
4306                         Location * location = _editor->find_location_from_marker (*m, is_start);
4307
4308                         if (location) {
4309                                 (*m)->set_position (is_start ? location->start() : location->end());
4310                         }
4311                 }
4312         }
4313 }
4314
4315 void
4316 MarkerDrag::update_item (Location*)
4317 {
4318         /* noop */
4319 }
4320
4321 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4322         : Drag (e, i)
4323         , _fixed_grab_x (0.0)
4324         , _fixed_grab_y (0.0)
4325         , _cumulative_x_drag (0.0)
4326         , _cumulative_y_drag (0.0)
4327         , _pushing (false)
4328         , _final_index (0)
4329 {
4330         if (_zero_gain_fraction < 0.0) {
4331                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4332         }
4333
4334         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4335
4336         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4337         assert (_point);
4338 }
4339
4340
4341 void
4342 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4343 {
4344         Drag::start_grab (event, _editor->cursors()->fader);
4345
4346         // start the grab at the center of the control point so
4347         // the point doesn't 'jump' to the mouse after the first drag
4348         _fixed_grab_x = _point->get_x();
4349         _fixed_grab_y = _point->get_y();
4350
4351         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4352         setup_snap_delta (pos);
4353
4354         float const fraction = 1 - (_point->get_y() / _point->line().height());
4355         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4356
4357         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4358
4359         if (!_point->can_slide ()) {
4360                 _x_constrained = true;
4361         }
4362 }
4363
4364 void
4365 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4366 {
4367         double dx = _drags->current_pointer_x() - last_pointer_x();
4368         double dy = current_pointer_y() - last_pointer_y();
4369         bool need_snap = true;
4370
4371         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4372                 dx *= 0.1;
4373                 dy *= 0.1;
4374                 need_snap = false;
4375         }
4376
4377         /* coordinate in pixels relative to the start of the region (for region-based automation)
4378            or track (for track-based automation) */
4379         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4380         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4381
4382         // calculate zero crossing point. back off by .01 to stay on the
4383         // positive side of zero
4384         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4385
4386         if (_x_constrained) {
4387                 cx = _fixed_grab_x;
4388         }
4389         if (_y_constrained) {
4390                 cy = _fixed_grab_y;
4391         }
4392
4393         _cumulative_x_drag = cx - _fixed_grab_x;
4394         _cumulative_y_drag = cy - _fixed_grab_y;
4395
4396         cx = max (0.0, cx);
4397         cy = max (0.0, cy);
4398         cy = min ((double) _point->line().height(), cy);
4399
4400         // make sure we hit zero when passing through
4401         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4402                 cy = zero_gain_y;
4403         }
4404
4405         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4406
4407         if (!_x_constrained && need_snap) {
4408                 _editor->snap_to_with_modifier (cx_frames, event);
4409         }
4410
4411         cx_frames -= snap_delta (event->button.state);
4412         cx_frames = min (cx_frames, _point->line().maximum_time());
4413
4414         float const fraction = 1.0 - (cy / _point->line().height());
4415
4416         if (first_motion) {
4417                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4418                 _editor->begin_reversible_command (_("automation event move"));
4419                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4420         }
4421         pair<double, float> result;
4422         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4423
4424         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4425 }
4426
4427 void
4428 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4429 {
4430         if (!movement_occurred) {
4431
4432                 /* just a click */
4433                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4434                         _editor->reset_point_selection ();
4435                 }
4436
4437         } else {
4438                 _point->line().end_drag (_pushing, _final_index);
4439                 _editor->commit_reversible_command ();
4440         }
4441 }
4442
4443 void
4444 ControlPointDrag::aborted (bool)
4445 {
4446         _point->line().reset ();
4447 }
4448
4449 bool
4450 ControlPointDrag::active (Editing::MouseMode m)
4451 {
4452         if (m == Editing::MouseDraw) {
4453                 /* always active in mouse draw */
4454                 return true;
4455         }
4456
4457         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4458         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4459 }
4460
4461 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4462         : Drag (e, i)
4463         , _line (0)
4464         , _fixed_grab_x (0.0)
4465         , _fixed_grab_y (0.0)
4466         , _cumulative_y_drag (0)
4467         , _before (0)
4468         , _after (0)
4469 {
4470         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4471 }
4472
4473 void
4474 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4475 {
4476         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4477         assert (_line);
4478
4479         _item = &_line->grab_item ();
4480
4481         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4482            origin, and ditto for y.
4483         */
4484
4485         double mx = event->button.x;
4486         double my = event->button.y;
4487
4488         _line->grab_item().canvas_to_item (mx, my);
4489
4490         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4491
4492         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4493                 /* no adjacent points */
4494                 return;
4495         }
4496
4497         Drag::start_grab (event, _editor->cursors()->fader);
4498
4499         /* store grab start in item frame */
4500         double const bx = _line->nth (_before)->get_x();
4501         double const ax = _line->nth (_after)->get_x();
4502         double const click_ratio = (ax - mx) / (ax - bx);
4503
4504         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4505
4506         _fixed_grab_x = mx;
4507         _fixed_grab_y = cy;
4508
4509         double fraction = 1.0 - (cy / _line->height());
4510
4511         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4512 }
4513
4514 void
4515 LineDrag::motion (GdkEvent* event, bool first_move)
4516 {
4517         double dy = current_pointer_y() - last_pointer_y();
4518
4519         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4520                 dy *= 0.1;
4521         }
4522
4523         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4524
4525         _cumulative_y_drag = cy - _fixed_grab_y;
4526
4527         cy = max (0.0, cy);
4528         cy = min ((double) _line->height(), cy);
4529
4530         double const fraction = 1.0 - (cy / _line->height());
4531         uint32_t ignored;
4532
4533         if (first_move) {
4534                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4535
4536                 _editor->begin_reversible_command (_("automation range move"));
4537                 _line->start_drag_line (_before, _after, initial_fraction);
4538         }
4539
4540         /* we are ignoring x position for this drag, so we can just pass in anything */
4541         pair<double, float> result;
4542
4543         result = _line->drag_motion (0, fraction, true, false, ignored);
4544         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4545 }
4546
4547 void
4548 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4549 {
4550         if (movement_occurred) {
4551                 motion (event, false);
4552                 _line->end_drag (false, 0);
4553                 _editor->commit_reversible_command ();
4554         } else {
4555                 /* add a new control point on the line */
4556
4557                 AutomationTimeAxisView* atv;
4558
4559                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4560                         framepos_t where = grab_frame ();
4561
4562                         double cx = 0;
4563                         double cy = _fixed_grab_y;
4564
4565                         _line->grab_item().item_to_canvas (cx, cy);
4566
4567                         atv->add_automation_event (event, where, cy, false);
4568                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4569                         AudioRegionView* arv;
4570
4571                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4572                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4573                         }
4574                 }
4575         }
4576 }
4577
4578 void
4579 LineDrag::aborted (bool)
4580 {
4581         _line->reset ();
4582 }
4583
4584 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4585         : Drag (e, i),
4586           _line (0),
4587           _arv (0),
4588           _region_view_grab_x (0.0),
4589           _cumulative_x_drag (0),
4590           _before (0.0),
4591           _max_x (0)
4592 {
4593         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4594 }
4595
4596 void
4597 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4598 {
4599         Drag::start_grab (event);
4600
4601         _line = reinterpret_cast<Line*> (_item);
4602         assert (_line);
4603
4604         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4605
4606         double cx = event->button.x;
4607         double cy = event->button.y;
4608
4609         _item->parent()->canvas_to_item (cx, cy);
4610
4611         /* store grab start in parent frame */
4612         _region_view_grab_x = cx;
4613
4614         _before = *(float*) _item->get_data ("position");
4615
4616         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4617
4618         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4619 }
4620
4621 void
4622 FeatureLineDrag::motion (GdkEvent*, bool)
4623 {
4624         double dx = _drags->current_pointer_x() - last_pointer_x();
4625
4626         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4627
4628         _cumulative_x_drag += dx;
4629
4630         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4631
4632         if (cx > _max_x){
4633                 cx = _max_x;
4634         }
4635         else if(cx < 0){
4636                 cx = 0;
4637         }
4638
4639         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4640         assert (bbox);
4641         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4642
4643         float *pos = new float;
4644         *pos = cx;
4645
4646         _line->set_data ("position", pos);
4647
4648         _before = cx;
4649 }
4650
4651 void
4652 FeatureLineDrag::finished (GdkEvent*, bool)
4653 {
4654         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4655         _arv->update_transient(_before, _before);
4656 }
4657
4658 void
4659 FeatureLineDrag::aborted (bool)
4660 {
4661         //_line->reset ();
4662 }
4663
4664 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4665         : Drag (e, i)
4666         , _vertical_only (false)
4667 {
4668         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4669 }
4670
4671 void
4672 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4673 {
4674         Drag::start_grab (event);
4675         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4676 }
4677
4678 void
4679 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4680 {
4681         framepos_t start;
4682         framepos_t end;
4683         double y1;
4684         double y2;
4685
4686         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4687
4688         framepos_t grab = grab_frame ();
4689         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4690                 _editor->snap_to_with_modifier (grab, event);
4691         } else {
4692                 grab = raw_grab_frame ();
4693         }
4694
4695         /* base start and end on initial click position */
4696
4697         if (pf < grab) {
4698                 start = pf;
4699                 end = grab;
4700         } else {
4701                 end = pf;
4702                 start = grab;
4703         }
4704
4705         if (current_pointer_y() < grab_y()) {
4706                 y1 = current_pointer_y();
4707                 y2 = grab_y();
4708         } else {
4709                 y2 = current_pointer_y();
4710                 y1 = grab_y();
4711         }
4712
4713         if (start != end || y1 != y2) {
4714
4715                 double x1 = _editor->sample_to_pixel (start);
4716                 double x2 = _editor->sample_to_pixel (end);
4717                 const double min_dimension = 2.0;
4718
4719                 if (_vertical_only) {
4720                         /* fixed 10 pixel width */
4721                         x2 = x1 + 10;
4722                 } else {
4723                         if (x2 < x1) {
4724                                 x2 = min (x1 - min_dimension, x2);
4725                         } else {
4726                                 x2 = max (x1 + min_dimension, x2);
4727                         }
4728                 }
4729
4730                 if (y2 < y1) {
4731                         y2 = min (y1 - min_dimension, y2);
4732                 } else {
4733                         y2 = max (y1 + min_dimension, y2);
4734                 }
4735
4736                 /* translate rect into item space and set */
4737
4738                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4739
4740                 /* this drag is a _trackview_only == true drag, so the y1 and
4741                  * y2 (computed using current_pointer_y() and grab_y()) will be
4742                  * relative to the top of the trackview group). The
4743                  * rubberband rect has the same parent/scroll offset as the
4744                  * the trackview group, so we can use the "r" rect directly
4745                  * to set the shape of the rubberband.
4746                  */
4747
4748                 _editor->rubberband_rect->set (r);
4749                 _editor->rubberband_rect->show();
4750                 _editor->rubberband_rect->raise_to_top();
4751
4752                 show_verbose_cursor_time (pf);
4753
4754                 do_select_things (event, true);
4755         }
4756 }
4757
4758 void
4759 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4760 {
4761         framepos_t x1;
4762         framepos_t x2;
4763         framepos_t grab = grab_frame ();
4764         framepos_t lpf = last_pointer_frame ();
4765
4766         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4767                 grab = raw_grab_frame ();
4768                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4769         }
4770
4771         if (grab < lpf) {
4772                 x1 = grab;
4773                 x2 = lpf;
4774         } else {
4775                 x2 = grab;
4776                 x1 = lpf;
4777         }
4778
4779         double y1;
4780         double y2;
4781
4782         if (current_pointer_y() < grab_y()) {
4783                 y1 = current_pointer_y();
4784                 y2 = grab_y();
4785         } else {
4786                 y2 = current_pointer_y();
4787                 y1 = grab_y();
4788         }
4789
4790         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4791 }
4792
4793 void
4794 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4795 {
4796         if (movement_occurred) {
4797
4798                 motion (event, false);
4799                 do_select_things (event, false);
4800
4801         } else {
4802
4803                 /* just a click */
4804
4805                 bool do_deselect = true;
4806                 MidiTimeAxisView* mtv;
4807
4808                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4809                         /* MIDI track */
4810                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4811                                 /* nothing selected */
4812                                 add_midi_region (mtv, true);
4813                                 do_deselect = false;
4814                         }
4815                 }
4816
4817                 /* do not deselect if Primary or Tertiary (toggle-select or
4818                  * extend-select are pressed.
4819                  */
4820
4821                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4822                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4823                     do_deselect) {
4824                         deselect_things ();
4825                 }
4826
4827         }
4828
4829         _editor->rubberband_rect->hide();
4830 }
4831
4832 void
4833 RubberbandSelectDrag::aborted (bool)
4834 {
4835         _editor->rubberband_rect->hide ();
4836 }
4837
4838 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4839         : RegionDrag (e, i, p, v)
4840 {
4841         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4842 }
4843
4844 void
4845 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4846 {
4847         Drag::start_grab (event, cursor);
4848
4849         _editor->get_selection().add (_primary);
4850
4851         framepos_t where = _primary->region()->position();
4852         setup_snap_delta (where);
4853
4854         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4855 }
4856
4857 void
4858 TimeFXDrag::motion (GdkEvent* event, bool)
4859 {
4860         RegionView* rv = _primary;
4861         StreamView* cv = rv->get_time_axis_view().view ();
4862
4863         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4864         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4865         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4866         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4867         _editor->snap_to_with_modifier (pf, event);
4868         pf -= snap_delta (event->button.state);
4869
4870         if (pf > rv->region()->position()) {
4871                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4872         }
4873
4874         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4875 }
4876
4877 void
4878 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4879 {
4880         /* this may have been a single click, no drag. We still want the dialog
4881            to show up in that case, so that the user can manually edit the
4882            parameters for the timestretch.
4883         */
4884
4885         float fraction = 1.0;
4886
4887         if (movement_occurred) {
4888
4889                 motion (event, false);
4890
4891                 _primary->get_time_axis_view().hide_timestretch ();
4892
4893                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4894
4895                 if (adjusted_frame_pos < _primary->region()->position()) {
4896                         /* backwards drag of the left edge - not usable */
4897                         return;
4898                 }
4899
4900                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4901
4902                 fraction = (double) newlen / (double) _primary->region()->length();
4903
4904 #ifndef USE_RUBBERBAND
4905                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4906                 if (_primary->region()->data_type() == DataType::AUDIO) {
4907                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4908                 }
4909 #endif
4910         }
4911
4912         if (!_editor->get_selection().regions.empty()) {
4913                 /* primary will already be included in the selection, and edit
4914                    group shared editing will propagate selection across
4915                    equivalent regions, so just use the current region
4916                    selection.
4917                 */
4918
4919                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4920                         error << _("An error occurred while executing time stretch operation") << endmsg;
4921                 }
4922         }
4923 }
4924
4925 void
4926 TimeFXDrag::aborted (bool)
4927 {
4928         _primary->get_time_axis_view().hide_timestretch ();
4929 }
4930
4931 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4932         : Drag (e, i)
4933 {
4934         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4935 }
4936
4937 void
4938 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4939 {
4940         Drag::start_grab (event);
4941 }
4942
4943 void
4944 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4945 {
4946         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4947 }
4948
4949 void
4950 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4951 {
4952         if (movement_occurred && _editor->session()) {
4953                 /* make sure we stop */
4954                 _editor->session()->request_transport_speed (0.0);
4955         }
4956 }
4957
4958 void
4959 ScrubDrag::aborted (bool)
4960 {
4961         /* XXX: TODO */
4962 }
4963
4964 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4965         : Drag (e, i)
4966         , _operation (o)
4967         , _add (false)
4968         , _time_selection_at_start (!_editor->get_selection().time.empty())
4969 {
4970         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4971
4972         if (_time_selection_at_start) {
4973                 start_at_start = _editor->get_selection().time.start();
4974                 end_at_start = _editor->get_selection().time.end_frame();
4975         }
4976 }
4977
4978 void
4979 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4980 {
4981         if (_editor->session() == 0) {
4982                 return;
4983         }
4984
4985         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4986
4987         switch (_operation) {
4988         case CreateSelection:
4989                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4990                         _add = true;
4991                 } else {
4992                         _add = false;
4993                 }
4994                 cursor = _editor->cursors()->selector;
4995                 Drag::start_grab (event, cursor);
4996                 break;
4997
4998         case SelectionStartTrim:
4999                 if (_editor->clicked_axisview) {
5000                         _editor->clicked_axisview->order_selection_trims (_item, true);
5001                 }
5002                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
5003                 break;
5004
5005         case SelectionEndTrim:
5006                 if (_editor->clicked_axisview) {
5007                         _editor->clicked_axisview->order_selection_trims (_item, false);
5008                 }
5009                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
5010                 break;
5011
5012         case SelectionMove:
5013                 Drag::start_grab (event, cursor);
5014                 break;
5015
5016         case SelectionExtend:
5017                 Drag::start_grab (event, cursor);
5018                 break;
5019         }
5020
5021         if (_operation == SelectionMove) {
5022                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
5023         } else {
5024                 show_verbose_cursor_time (adjusted_current_frame (event));
5025         }
5026 }
5027
5028 void
5029 SelectionDrag::setup_pointer_frame_offset ()
5030 {
5031         switch (_operation) {
5032         case CreateSelection:
5033                 _pointer_frame_offset = 0;
5034                 break;
5035
5036         case SelectionStartTrim:
5037         case SelectionMove:
5038                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5039                 break;
5040
5041         case SelectionEndTrim:
5042                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5043                 break;
5044
5045         case SelectionExtend:
5046                 break;
5047         }
5048 }
5049
5050 void
5051 SelectionDrag::motion (GdkEvent* event, bool first_move)
5052 {
5053         framepos_t start = 0;
5054         framepos_t end = 0;
5055         framecnt_t length = 0;
5056         framecnt_t distance = 0;
5057
5058         framepos_t const pending_position = adjusted_current_frame (event);
5059
5060         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5061                 return;
5062         }
5063
5064         switch (_operation) {
5065         case CreateSelection:
5066         {
5067                 framepos_t grab = grab_frame ();
5068
5069                 if (first_move) {
5070                         grab = adjusted_current_frame (event, false);
5071                         if (grab < pending_position) {
5072                                 _editor->snap_to (grab, RoundDownMaybe);
5073                         }  else {
5074                                 _editor->snap_to (grab, RoundUpMaybe);
5075                         }
5076                 }
5077
5078                 if (pending_position < grab) {
5079                         start = pending_position;
5080                         end = grab;
5081                 } else {
5082                         end = pending_position;
5083                         start = grab;
5084                 }
5085
5086                 /* first drag: Either add to the selection
5087                    or create a new selection
5088                 */
5089
5090                 if (first_move) {
5091
5092                         if (_add) {
5093
5094                                 /* adding to the selection */
5095                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5096                                 _editor->clicked_selection = _editor->selection->add (start, end);
5097                                 _add = false;
5098
5099                         } else {
5100
5101                                 /* new selection */
5102
5103                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5104                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5105                                 }
5106
5107                                 _editor->clicked_selection = _editor->selection->set (start, end);
5108                         }
5109                 }
5110
5111                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5112                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5113                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5114                 if (atest) {
5115                         _editor->selection->add (atest);
5116                         break;
5117                 }
5118
5119                 /* select all tracks within the rectangle that we've marked out so far */
5120                 TrackViewList new_selection;
5121                 TrackViewList& all_tracks (_editor->track_views);
5122
5123                 ArdourCanvas::Coord const top = grab_y();
5124                 ArdourCanvas::Coord const bottom = current_pointer_y();
5125
5126                 if (top >= 0 && bottom >= 0) {
5127
5128                         //first, find the tracks that are covered in the y range selection
5129                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5130                                 if ((*i)->covered_by_y_range (top, bottom)) {
5131                                         new_selection.push_back (*i);
5132                                 }
5133                         }
5134
5135                         //now find any tracks that are GROUPED with the tracks we selected
5136                         TrackViewList grouped_add = new_selection;
5137                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5138                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5139                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5140                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5141                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5142                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5143                                                         grouped_add.push_back (*j);
5144                                         }
5145                                 }
5146                         }
5147
5148                         //now compare our list with the current selection, and add or remove as necessary
5149                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5150                         TrackViewList tracks_to_add;
5151                         TrackViewList tracks_to_remove;
5152                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5153                                 if ( !_editor->selection->tracks.contains ( *i ) )
5154                                         tracks_to_add.push_back ( *i );
5155                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5156                                 if ( !grouped_add.contains ( *i ) )
5157                                         tracks_to_remove.push_back ( *i );
5158                         _editor->selection->add(tracks_to_add);
5159                         _editor->selection->remove(tracks_to_remove);
5160
5161                 }
5162         }
5163         break;
5164
5165         case SelectionStartTrim:
5166
5167                 end = _editor->selection->time[_editor->clicked_selection].end;
5168
5169                 if (pending_position > end) {
5170                         start = end;
5171                 } else {
5172                         start = pending_position;
5173                 }
5174                 break;
5175
5176         case SelectionEndTrim:
5177
5178                 start = _editor->selection->time[_editor->clicked_selection].start;
5179
5180                 if (pending_position < start) {
5181                         end = start;
5182                 } else {
5183                         end = pending_position;
5184                 }
5185
5186                 break;
5187
5188         case SelectionMove:
5189
5190                 start = _editor->selection->time[_editor->clicked_selection].start;
5191                 end = _editor->selection->time[_editor->clicked_selection].end;
5192
5193                 length = end - start;
5194                 distance = pending_position - start;
5195                 start = pending_position;
5196                 _editor->snap_to (start);
5197
5198                 end = start + length;
5199
5200                 break;
5201
5202         case SelectionExtend:
5203                 break;
5204         }
5205
5206         if (start != end) {
5207                 switch (_operation) {
5208                 case SelectionMove:
5209                         if (_time_selection_at_start) {
5210                                 _editor->selection->move_time (distance);
5211                         }
5212                         break;
5213                 default:
5214                         _editor->selection->replace (_editor->clicked_selection, start, end);
5215                 }
5216         }
5217
5218         if (_operation == SelectionMove) {
5219                 show_verbose_cursor_time(start);
5220         } else {
5221                 show_verbose_cursor_time(pending_position);
5222         }
5223 }
5224
5225 void
5226 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5227 {
5228         Session* s = _editor->session();
5229
5230         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5231         if (movement_occurred) {
5232                 motion (event, false);
5233                 /* XXX this is not object-oriented programming at all. ick */
5234                 if (_editor->selection->time.consolidate()) {
5235                         _editor->selection->TimeChanged ();
5236                 }
5237
5238                 /* XXX what if its a music time selection? */
5239                 if (s) {
5240                         if (s->get_play_range() && s->transport_rolling()) {
5241                                 s->request_play_range (&_editor->selection->time, true);
5242                         } else if (!s->config.get_external_sync()) {
5243                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5244                                         if (_operation == SelectionEndTrim)
5245                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5246                                         else
5247                                                 s->request_locate (_editor->get_selection().time.start());
5248                                 }
5249                         }
5250
5251                         if (_editor->get_selection().time.length() != 0) {
5252                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5253                         } else {
5254                                 s->clear_range_selection ();
5255                         }
5256                 }
5257
5258         } else {
5259                 /* just a click, no pointer movement.
5260                  */
5261
5262                 if (_operation == SelectionExtend) {
5263                         if (_time_selection_at_start) {
5264                                 framepos_t pos = adjusted_current_frame (event, false);
5265                                 framepos_t start = min (pos, start_at_start);
5266                                 framepos_t end = max (pos, end_at_start);
5267                                 _editor->selection->set (start, end);
5268                         }
5269                 } else {
5270                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5271                                 if (_editor->clicked_selection) {
5272                                         _editor->selection->remove (_editor->clicked_selection);
5273                                 }
5274                         } else {
5275                                 if (!_editor->clicked_selection) {
5276                                         _editor->selection->clear_time();
5277                                 }
5278                         }
5279                 }
5280
5281                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5282                         _editor->selection->set (_editor->clicked_axisview);
5283                 }
5284
5285                 if (s && s->get_play_range () && s->transport_rolling()) {
5286                         s->request_stop (false, false);
5287                 }
5288
5289         }
5290
5291         _editor->stop_canvas_autoscroll ();
5292         _editor->clicked_selection = 0;
5293         _editor->commit_reversible_selection_op ();
5294 }
5295
5296 void
5297 SelectionDrag::aborted (bool)
5298 {
5299         /* XXX: TODO */
5300 }
5301
5302 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5303         : Drag (e, i, false),
5304           _operation (o),
5305           _copy (false)
5306 {
5307         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5308
5309         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5310                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5311                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5312         _drag_rect->hide ();
5313
5314         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5315         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5316 }
5317
5318 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5319 {
5320         /* normal canvas items will be cleaned up when their parent group is deleted. But
5321            this item is created as the child of a long-lived parent group, and so we
5322            need to explicitly delete it.
5323         */
5324         delete _drag_rect;
5325 }
5326
5327 void
5328 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5329 {
5330         if (_editor->session() == 0) {
5331                 return;
5332         }
5333
5334         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5335
5336         if (!_editor->temp_location) {
5337                 _editor->temp_location = new Location (*_editor->session());
5338         }
5339
5340         switch (_operation) {
5341         case CreateSkipMarker:
5342         case CreateRangeMarker:
5343         case CreateTransportMarker:
5344         case CreateCDMarker:
5345
5346                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5347                         _copy = true;
5348                 } else {
5349                         _copy = false;
5350                 }
5351                 cursor = _editor->cursors()->selector;
5352                 break;
5353         }
5354
5355         Drag::start_grab (event, cursor);
5356
5357         show_verbose_cursor_time (adjusted_current_frame (event));
5358 }
5359
5360 void
5361 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5362 {
5363         framepos_t start = 0;
5364         framepos_t end = 0;
5365         ArdourCanvas::Rectangle *crect;
5366
5367         switch (_operation) {
5368         case CreateSkipMarker:
5369                 crect = _editor->range_bar_drag_rect;
5370                 break;
5371         case CreateRangeMarker:
5372                 crect = _editor->range_bar_drag_rect;
5373                 break;
5374         case CreateTransportMarker:
5375                 crect = _editor->transport_bar_drag_rect;
5376                 break;
5377         case CreateCDMarker:
5378                 crect = _editor->cd_marker_bar_drag_rect;
5379                 break;
5380         default:
5381                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5382                 return;
5383                 break;
5384         }
5385
5386         framepos_t const pf = adjusted_current_frame (event);
5387
5388         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5389                 framepos_t grab = grab_frame ();
5390                 _editor->snap_to (grab);
5391
5392                 if (pf < grab_frame()) {
5393                         start = pf;
5394                         end = grab;
5395                 } else {
5396                         end = pf;
5397                         start = grab;
5398                 }
5399
5400                 /* first drag: Either add to the selection
5401                    or create a new selection.
5402                 */
5403
5404                 if (first_move) {
5405
5406                         _editor->temp_location->set (start, end);
5407
5408                         crect->show ();
5409
5410                         update_item (_editor->temp_location);
5411                         _drag_rect->show();
5412                         //_drag_rect->raise_to_top();
5413
5414                 }
5415         }
5416
5417         if (start != end) {
5418                 _editor->temp_location->set (start, end);
5419
5420                 double x1 = _editor->sample_to_pixel (start);
5421                 double x2 = _editor->sample_to_pixel (end);
5422                 crect->set_x0 (x1);
5423                 crect->set_x1 (x2);
5424
5425                 update_item (_editor->temp_location);
5426         }
5427
5428         show_verbose_cursor_time (pf);
5429
5430 }
5431
5432 void
5433 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5434 {
5435         Location * newloc = 0;
5436         string rangename;
5437         int flags;
5438
5439         if (movement_occurred) {
5440                 motion (event, false);
5441                 _drag_rect->hide();
5442
5443                 switch (_operation) {
5444                 case CreateSkipMarker:
5445                 case CreateRangeMarker:
5446                 case CreateCDMarker:
5447                     {
5448                         XMLNode &before = _editor->session()->locations()->get_state();
5449                         if (_operation == CreateSkipMarker) {
5450                                 _editor->begin_reversible_command (_("new skip marker"));
5451                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5452                                 flags = Location::IsRangeMarker | Location::IsSkip;
5453                                 _editor->range_bar_drag_rect->hide();
5454                         } else if (_operation == CreateCDMarker) {
5455                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5456                                 _editor->begin_reversible_command (_("new CD marker"));
5457                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5458                                 _editor->cd_marker_bar_drag_rect->hide();
5459                         } else {
5460                                 _editor->begin_reversible_command (_("new skip marker"));
5461                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5462                                 flags = Location::IsRangeMarker;
5463                                 _editor->range_bar_drag_rect->hide();
5464                         }
5465                         newloc = new Location (
5466                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5467                                 );
5468
5469                         _editor->session()->locations()->add (newloc, true);
5470                         XMLNode &after = _editor->session()->locations()->get_state();
5471                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5472                         _editor->commit_reversible_command ();
5473                         break;
5474                     }
5475
5476                 case CreateTransportMarker:
5477                         // popup menu to pick loop or punch
5478                         _editor->new_transport_marker_context_menu (&event->button, _item);
5479                         break;
5480                 }
5481
5482         } else {
5483
5484                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5485
5486                 if (_operation == CreateTransportMarker) {
5487
5488                         /* didn't drag, so just locate */
5489
5490                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5491
5492                 } else if (_operation == CreateCDMarker) {
5493
5494                         /* didn't drag, but mark is already created so do
5495                          * nothing */
5496
5497                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5498
5499                         framepos_t start;
5500                         framepos_t end;
5501
5502                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5503
5504                         if (end == max_framepos) {
5505                                 end = _editor->session()->current_end_frame ();
5506                         }
5507
5508                         if (start == max_framepos) {
5509                                 start = _editor->session()->current_start_frame ();
5510                         }
5511
5512                         switch (_editor->mouse_mode) {
5513                         case MouseObject:
5514                                 /* find the two markers on either side and then make the selection from it */
5515                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5516                                 break;
5517
5518                         case MouseRange:
5519                                 /* find the two markers on either side of the click and make the range out of it */
5520                                 _editor->selection->set (start, end);
5521                                 break;
5522
5523                         default:
5524                                 break;
5525                         }
5526                 }
5527         }
5528
5529         _editor->stop_canvas_autoscroll ();
5530 }
5531
5532 void
5533 RangeMarkerBarDrag::aborted (bool movement_occurred)
5534 {
5535         if (movement_occurred) {
5536                 _drag_rect->hide ();
5537         }
5538 }
5539
5540 void
5541 RangeMarkerBarDrag::update_item (Location* location)
5542 {
5543         double const x1 = _editor->sample_to_pixel (location->start());
5544         double const x2 = _editor->sample_to_pixel (location->end());
5545
5546         _drag_rect->set_x0 (x1);
5547         _drag_rect->set_x1 (x2);
5548 }
5549
5550 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5551         : Drag (e, i)
5552         , _cumulative_dx (0)
5553         , _cumulative_dy (0)
5554         , _was_selected (false)
5555 {
5556         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5557
5558         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5559         assert (_primary);
5560         _region = &_primary->region_view ();
5561         _note_height = _region->midi_stream_view()->note_height ();
5562 }
5563
5564 void
5565 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5566 {
5567         Drag::start_grab (event);
5568         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5569
5570         if (!(_was_selected = _primary->selected())) {
5571
5572                 /* tertiary-click means extend selection - we'll do that on button release,
5573                    so don't add it here, because otherwise we make it hard to figure
5574                    out the "extend-to" range.
5575                 */
5576
5577                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5578
5579                 if (!extend) {
5580                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5581
5582                         if (add) {
5583                                 _region->note_selected (_primary, true);
5584                         } else {
5585                                 _editor->get_selection().clear_points();
5586                                 _region->unique_select (_primary);
5587                         }
5588                 }
5589         }
5590 }
5591
5592 /** @return Current total drag x change in frames */
5593 frameoffset_t
5594 NoteDrag::total_dx (const guint state) const
5595 {
5596         /* dx in frames */
5597         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5598
5599         /* primary note time */
5600         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5601
5602         /* new time of the primary note in session frames */
5603         frameoffset_t st = n + dx + snap_delta (state);
5604
5605         framepos_t const rp = _region->region()->position ();
5606
5607         /* prevent the note being dragged earlier than the region's position */
5608         st = max (st, rp);
5609
5610         /* possibly snap and return corresponding delta */
5611
5612         bool snap = true;
5613
5614         if (ArdourKeyboard::indicates_snap (state)) {
5615                 if (_editor->snap_mode () != SnapOff) {
5616                         snap = false;
5617                 }
5618         } else {
5619                 if (_editor->snap_mode () == SnapOff) {
5620                         snap = false;
5621                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5622                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5623                                 snap = true;
5624                         }
5625                 }
5626         }
5627
5628         frameoffset_t ret;
5629         if (snap) {
5630                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5631                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5632         } else {
5633                 ret = st - n - snap_delta (state);
5634         }
5635         return ret;
5636 }
5637
5638 /** @return Current total drag y change in note number */
5639 int8_t
5640 NoteDrag::total_dy () const
5641 {
5642         MidiStreamView* msv = _region->midi_stream_view ();
5643         double const y = _region->midi_view()->y_position ();
5644         /* new current note */
5645         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5646         /* clamp */
5647         n = max (msv->lowest_note(), n);
5648         n = min (msv->highest_note(), n);
5649         /* and work out delta */
5650         return n - msv->y_to_note (grab_y() - y);
5651 }
5652
5653 void
5654 NoteDrag::motion (GdkEvent * event, bool)
5655 {
5656         /* Total change in x and y since the start of the drag */
5657         frameoffset_t const dx = total_dx (event->button.state);
5658         int8_t const dy = total_dy ();
5659
5660         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5661         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5662         double const tdy = -dy * _note_height - _cumulative_dy;
5663
5664         if (tdx || tdy) {
5665                 _cumulative_dx += tdx;
5666                 _cumulative_dy += tdy;
5667
5668                 int8_t note_delta = total_dy();
5669
5670                 _region->move_selection (tdx, tdy, note_delta);
5671
5672                 /* the new note value may be the same as the old one, but we
5673                  * don't know what that means because the selection may have
5674                  * involved more than one note and we might be doing something
5675                  * odd with them. so show the note value anyway, always.
5676                  */
5677
5678                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5679
5680                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5681         }
5682 }
5683
5684 void
5685 NoteDrag::finished (GdkEvent* ev, bool moved)
5686 {
5687         if (!moved) {
5688                 /* no motion - select note */
5689
5690                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5691                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5692
5693                         bool changed = false;
5694
5695                         if (_was_selected) {
5696                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5697                                 if (add) {
5698                                         _region->note_deselected (_primary);
5699                                         changed = true;
5700                                 } else {
5701                                         _editor->get_selection().clear_points();
5702                                         _region->unique_select (_primary);
5703                                         changed = true;
5704                                 }
5705                         } else {
5706                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5707                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5708
5709                                 if (!extend && !add && _region->selection_size() > 1) {
5710                                         _editor->get_selection().clear_points();
5711                                         _region->unique_select (_primary);
5712                                         changed = true;
5713                                 } else if (extend) {
5714                                         _region->note_selected (_primary, true, true);
5715                                         changed = true;
5716                                 } else {
5717                                         /* it was added during button press */
5718                                         changed = true;
5719
5720                                 }
5721                         }
5722
5723                         if (changed) {
5724                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5725                                 _editor->commit_reversible_selection_op();
5726                         }
5727                 }
5728         } else {
5729                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5730         }
5731 }
5732
5733 void
5734 NoteDrag::aborted (bool)
5735 {
5736         /* XXX: TODO */
5737 }
5738
5739 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5740 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5741         : Drag (editor, atv->base_item ())
5742         , _ranges (r)
5743         , _y_origin (atv->y_position())
5744         , _nothing_to_drag (false)
5745 {
5746         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5747         setup (atv->lines ());
5748 }
5749
5750 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5751 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5752         : Drag (editor, rv->get_canvas_group ())
5753         , _ranges (r)
5754         , _y_origin (rv->get_time_axis_view().y_position())
5755         , _nothing_to_drag (false)
5756         , _integral (false)
5757 {
5758         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5759
5760         list<boost::shared_ptr<AutomationLine> > lines;
5761
5762         AudioRegionView*      audio_view;
5763         AutomationRegionView* automation_view;
5764         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5765                 lines.push_back (audio_view->get_gain_line ());
5766         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5767                 lines.push_back (automation_view->line ());
5768                 _integral = true;
5769         } else {
5770                 error << _("Automation range drag created for invalid region type") << endmsg;
5771         }
5772
5773         setup (lines);
5774 }
5775
5776 /** @param lines AutomationLines to drag.
5777  *  @param offset Offset from the session start to the points in the AutomationLines.
5778  */
5779 void
5780 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5781 {
5782         /* find the lines that overlap the ranges being dragged */
5783         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5784         while (i != lines.end ()) {
5785                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5786                 ++j;
5787
5788                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5789
5790                 /* check this range against all the AudioRanges that we are using */
5791                 list<AudioRange>::const_iterator k = _ranges.begin ();
5792                 while (k != _ranges.end()) {
5793                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5794                                 break;
5795                         }
5796                         ++k;
5797                 }
5798
5799                 /* add it to our list if it overlaps at all */
5800                 if (k != _ranges.end()) {
5801                         Line n;
5802                         n.line = *i;
5803                         n.state = 0;
5804                         n.range = r;
5805                         _lines.push_back (n);
5806                 }
5807
5808                 i = j;
5809         }
5810
5811         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5812 }
5813
5814 double
5815 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5816 {
5817         return 1.0 - ((global_y - _y_origin) / line->height());
5818 }
5819
5820 double
5821 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5822 {
5823         const double v = list->eval(x);
5824         return _integral ? rint(v) : v;
5825 }
5826
5827 void
5828 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5829 {
5830         Drag::start_grab (event, cursor);
5831
5832         /* Get line states before we start changing things */
5833         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5834                 i->state = &i->line->get_state ();
5835                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5836         }
5837
5838         if (_ranges.empty()) {
5839
5840                 /* No selected time ranges: drag all points */
5841                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5842                         uint32_t const N = i->line->npoints ();
5843                         for (uint32_t j = 0; j < N; ++j) {
5844                                 i->points.push_back (i->line->nth (j));
5845                         }
5846                 }
5847
5848         }
5849
5850         if (_nothing_to_drag) {
5851                 return;
5852         }
5853 }
5854
5855 void
5856 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5857 {
5858         if (_nothing_to_drag && !first_move) {
5859                 return;
5860         }
5861
5862         if (first_move) {
5863                 _editor->begin_reversible_command (_("automation range move"));
5864
5865                 if (!_ranges.empty()) {
5866
5867                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5868
5869                                 framecnt_t const half = (i->start + i->end) / 2;
5870
5871                                 /* find the line that this audio range starts in */
5872                                 list<Line>::iterator j = _lines.begin();
5873                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5874                                         ++j;
5875                                 }
5876
5877                                 if (j != _lines.end()) {
5878                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5879
5880                                 /* j is the line that this audio range starts in; fade into it;
5881                                    64 samples length plucked out of thin air.
5882                                 */
5883
5884                                         framepos_t a = i->start + 64;
5885                                         if (a > half) {
5886                                                 a = half;
5887                                         }
5888
5889                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5890                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5891
5892                                         XMLNode &before = the_list->get_state();
5893                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5894                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5895
5896                                         if (add_p || add_q) {
5897                                                 _editor->session()->add_command (
5898                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5899                                         }
5900                                 }
5901
5902                                 /* same thing for the end */
5903
5904                                 j = _lines.begin();
5905                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5906                                         ++j;
5907                                 }
5908
5909                                 if (j != _lines.end()) {
5910                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5911
5912                                         /* j is the line that this audio range starts in; fade out of it;
5913                                            64 samples length plucked out of thin air.
5914                                         */
5915
5916                                         framepos_t b = i->end - 64;
5917                                         if (b < half) {
5918                                                 b = half;
5919                                         }
5920
5921                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5922                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5923
5924                                         XMLNode &before = the_list->get_state();
5925                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5926                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5927
5928                                         if (add_p || add_q) {
5929                                                 _editor->session()->add_command (
5930                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5931                                         }
5932                                 }
5933                         }
5934
5935                         _nothing_to_drag = true;
5936
5937                         /* Find all the points that should be dragged and put them in the relevant
5938                            points lists in the Line structs.
5939                         */
5940
5941                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5942
5943                                 uint32_t const N = i->line->npoints ();
5944                                 for (uint32_t j = 0; j < N; ++j) {
5945
5946                                         /* here's a control point on this line */
5947                                         ControlPoint* p = i->line->nth (j);
5948                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5949
5950                                         /* see if it's inside a range */
5951                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5952                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5953                                                 ++k;
5954                                         }
5955
5956                                         if (k != _ranges.end()) {
5957                                                 /* dragging this point */
5958                                                 _nothing_to_drag = false;
5959                                                 i->points.push_back (p);
5960                                         }
5961                                 }
5962                         }
5963                 }
5964
5965                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5966                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5967                 }
5968         }
5969
5970         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5971                 float const f = y_fraction (l->line, current_pointer_y());
5972                 /* we are ignoring x position for this drag, so we can just pass in anything */
5973                 pair<double, float> result;
5974                 uint32_t ignored;
5975                 result = l->line->drag_motion (0, f, true, false, ignored);
5976                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5977         }
5978 }
5979
5980 void
5981 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5982 {
5983         if (_nothing_to_drag || !motion_occurred) {
5984                 return;
5985         }
5986
5987         motion (event, false);
5988         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5989                 i->line->end_drag (false, 0);
5990         }
5991
5992         _editor->commit_reversible_command ();
5993 }
5994
5995 void
5996 AutomationRangeDrag::aborted (bool)
5997 {
5998         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5999                 i->line->reset ();
6000         }
6001 }
6002
6003 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
6004         : view (v)
6005         , initial_time_axis_view (itav)
6006 {
6007         /* note that time_axis_view may be null if the regionview was created
6008          * as part of a copy operation.
6009          */
6010         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
6011         layer = v->region()->layer ();
6012         initial_y = v->get_canvas_group()->position().y;
6013         initial_playlist = v->region()->playlist ();
6014         initial_position = v->region()->position ();
6015         initial_end = v->region()->position () + v->region()->length ();
6016 }
6017
6018 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
6019         : Drag (e, i->canvas_item ())
6020         , _region_view (r)
6021         , _patch_change (i)
6022         , _cumulative_dx (0)
6023 {
6024         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
6025                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
6026                                                    grab_frame()));
6027 }
6028
6029 void
6030 PatchChangeDrag::motion (GdkEvent* ev, bool)
6031 {
6032         framepos_t f = adjusted_current_frame (ev);
6033         boost::shared_ptr<Region> r = _region_view->region ();
6034         f = max (f, r->position ());
6035         f = min (f, r->last_frame ());
6036
6037         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6038         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6039         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6040         _cumulative_dx = dxu;
6041 }
6042
6043 void
6044 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6045 {
6046         if (!movement_occurred) {
6047                 return;
6048         }
6049
6050         boost::shared_ptr<Region> r (_region_view->region ());
6051         framepos_t f = adjusted_current_frame (ev);
6052         f = max (f, r->position ());
6053         f = min (f, r->last_frame ());
6054
6055         _region_view->move_patch_change (
6056                 *_patch_change,
6057                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6058                 );
6059 }
6060
6061 void
6062 PatchChangeDrag::aborted (bool)
6063 {
6064         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6065 }
6066
6067 void
6068 PatchChangeDrag::setup_pointer_frame_offset ()
6069 {
6070         boost::shared_ptr<Region> region = _region_view->region ();
6071         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6072 }
6073
6074 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6075         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6076         , _region_view (rv)
6077 {
6078
6079 }
6080
6081 void
6082 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6083 {
6084         _region_view->update_drag_selection (
6085                 x1, x2, y1, y2,
6086                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6087 }
6088
6089 void
6090 MidiRubberbandSelectDrag::deselect_things ()
6091 {
6092         /* XXX */
6093 }
6094
6095 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6096         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6097         , _region_view (rv)
6098 {
6099         _vertical_only = true;
6100 }
6101
6102 void
6103 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6104 {
6105         double const y = _region_view->midi_view()->y_position ();
6106
6107         y1 = max (0.0, y1 - y);
6108         y2 = max (0.0, y2 - y);
6109
6110         _region_view->update_vertical_drag_selection (
6111                 y1,
6112                 y2,
6113                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6114                 );
6115 }
6116
6117 void
6118 MidiVerticalSelectDrag::deselect_things ()
6119 {
6120         /* XXX */
6121 }
6122
6123 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6124         : RubberbandSelectDrag (e, i)
6125 {
6126
6127 }
6128
6129 void
6130 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6131 {
6132         if (drag_in_progress) {
6133                 /* We just want to select things at the end of the drag, not during it */
6134                 return;
6135         }
6136
6137         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6138
6139         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6140
6141         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6142
6143         _editor->commit_reversible_selection_op ();
6144 }
6145
6146 void
6147 EditorRubberbandSelectDrag::deselect_things ()
6148 {
6149         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6150
6151         _editor->selection->clear_tracks();
6152         _editor->selection->clear_regions();
6153         _editor->selection->clear_points ();
6154         _editor->selection->clear_lines ();
6155         _editor->selection->clear_midi_notes ();
6156
6157         _editor->commit_reversible_selection_op();
6158 }
6159
6160 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6161         : Drag (e, i)
6162         , _region_view (rv)
6163         , _drag_rect (0)
6164 {
6165         _note[0] = _note[1] = 0;
6166 }
6167
6168 NoteCreateDrag::~NoteCreateDrag ()
6169 {
6170         delete _drag_rect;
6171 }
6172
6173 framecnt_t
6174 NoteCreateDrag::grid_frames (framepos_t t) const
6175 {
6176         bool success;
6177         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6178         if (!success) {
6179                 grid_beats = Evoral::Beats(1);
6180         }
6181
6182         return _region_view->region_beats_to_region_frames (grid_beats);
6183 }
6184
6185 void
6186 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6187 {
6188         Drag::start_grab (event, cursor);
6189
6190         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6191
6192         framepos_t pf = _drags->current_pointer_frame ();
6193         framecnt_t const g = grid_frames (pf);
6194
6195         /* Hack so that we always snap to the note that we are over, instead of snapping
6196            to the next one if we're more than halfway through the one we're over.
6197         */
6198         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6199                 pf -= g / 2;
6200         }
6201
6202         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6203         _note[1] = _note[0];
6204
6205         MidiStreamView* sv = _region_view->midi_stream_view ();
6206         double const x = _editor->sample_to_pixel (_note[0]);
6207         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6208
6209         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6210         _drag_rect->set_outline_all ();
6211         _drag_rect->set_outline_color (0xffffff99);
6212         _drag_rect->set_fill_color (0xffffff66);
6213 }
6214
6215 void
6216 NoteCreateDrag::motion (GdkEvent* event, bool)
6217 {
6218         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6219         double const x0 = _editor->sample_to_pixel (_note[0]);
6220         double const x1 = _editor->sample_to_pixel (_note[1]);
6221         _drag_rect->set_x0 (std::min(x0, x1));
6222         _drag_rect->set_x1 (std::max(x0, x1));
6223 }
6224
6225 void
6226 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6227 {
6228         if (!had_movement) {
6229                 return;
6230         }
6231
6232         framepos_t const start = min (_note[0], _note[1]);
6233         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6234
6235         framecnt_t const g = grid_frames (start);
6236         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6237
6238         if (_editor->snap_mode() == SnapNormal && length < g) {
6239                 length = g;
6240         }
6241
6242         Evoral::Beats length_beats = max (
6243                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6244
6245         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6246 }
6247
6248 double
6249 NoteCreateDrag::y_to_region (double y) const
6250 {
6251         double x = 0;
6252         _region_view->get_canvas_group()->canvas_to_item (x, y);
6253         return y;
6254 }
6255
6256 void
6257 NoteCreateDrag::aborted (bool)
6258 {
6259
6260 }
6261
6262 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6263         : Drag (e, i)
6264         , arv (rv)
6265         , start (start_yn)
6266 {
6267         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6268 }
6269
6270 void
6271 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6272 {
6273         Drag::start_grab (event, cursor);
6274 }
6275
6276 void
6277 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6278 {
6279         double distance;
6280         double new_length;
6281         framecnt_t len;
6282
6283         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6284
6285         if (start) {
6286                 distance = _drags->current_pointer_x() - grab_x();
6287                 len = ar->fade_in()->back()->when;
6288         } else {
6289                 distance = grab_x() - _drags->current_pointer_x();
6290                 len = ar->fade_out()->back()->when;
6291         }
6292
6293         /* how long should it be ? */
6294
6295         new_length = len + _editor->pixel_to_sample (distance);
6296
6297         /* now check with the region that this is legal */
6298
6299         new_length = ar->verify_xfade_bounds (new_length, start);
6300
6301         if (start) {
6302                 arv->reset_fade_in_shape_width (ar, new_length);
6303         } else {
6304                 arv->reset_fade_out_shape_width (ar, new_length);
6305         }
6306 }
6307
6308 void
6309 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6310 {
6311         double distance;
6312         double new_length;
6313         framecnt_t len;
6314
6315         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6316
6317         if (start) {
6318                 distance = _drags->current_pointer_x() - grab_x();
6319                 len = ar->fade_in()->back()->when;
6320         } else {
6321                 distance = grab_x() - _drags->current_pointer_x();
6322                 len = ar->fade_out()->back()->when;
6323         }
6324
6325         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6326
6327         _editor->begin_reversible_command ("xfade trim");
6328         ar->playlist()->clear_owned_changes ();
6329
6330         if (start) {
6331                 ar->set_fade_in_length (new_length);
6332         } else {
6333                 ar->set_fade_out_length (new_length);
6334         }
6335
6336         /* Adjusting the xfade may affect other regions in the playlist, so we need
6337            to get undo Commands from the whole playlist rather than just the
6338            region.
6339         */
6340
6341         vector<Command*> cmds;
6342         ar->playlist()->rdiff (cmds);
6343         _editor->session()->add_commands (cmds);
6344         _editor->commit_reversible_command ();
6345
6346 }
6347
6348 void
6349 CrossfadeEdgeDrag::aborted (bool)
6350 {
6351         if (start) {
6352                 // arv->redraw_start_xfade ();
6353         } else {
6354                 // arv->redraw_end_xfade ();
6355         }
6356 }
6357
6358 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6359         : Drag (e, item, true)
6360         , line (new EditorCursor (*e))
6361 {
6362         line->set_position (pos);
6363         line->show ();
6364 }
6365
6366 RegionCutDrag::~RegionCutDrag ()
6367 {
6368         delete line;
6369 }
6370
6371 void
6372 RegionCutDrag::motion (GdkEvent*, bool)
6373 {
6374         framepos_t where = _drags->current_pointer_frame();
6375         _editor->snap_to (where);
6376
6377         line->set_position (where);
6378 }
6379
6380 void
6381 RegionCutDrag::finished (GdkEvent*, bool)
6382 {
6383         _editor->get_track_canvas()->canvas()->re_enter();
6384
6385         framepos_t pos = _drags->current_pointer_frame();
6386
6387         line->hide ();
6388
6389         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6390
6391         if (rs.empty()) {
6392                 return;
6393         }
6394
6395         _editor->split_regions_at (pos, rs);
6396 }
6397
6398 void
6399 RegionCutDrag::aborted (bool)
6400 {
6401 }