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         , _old_snap_type (e->snap_type())
3121         , before_state (0)
3122 {
3123         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3124         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3125         assert (_marker);
3126         _real_section = &_marker->meter();
3127
3128 }
3129
3130 void
3131 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3132 {
3133         Drag::start_grab (event, cursor);
3134         show_verbose_cursor_time (adjusted_current_frame(event));
3135 }
3136
3137 void
3138 MeterMarkerDrag::setup_pointer_frame_offset ()
3139 {
3140         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3141 }
3142
3143 void
3144 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3145 {
3146         if (first_move) {
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_at_bbt (bbt), _real_section->position_lock_style());
3184
3185                 }
3186                 /* only snap to bars */
3187                 _editor->set_snap_to (SnapToBar);
3188         }
3189
3190         framepos_t pf = adjusted_current_frame (event);
3191
3192         if (_real_section->position_lock_style() == AudioTime && _editor->snap_musical()) {
3193                 /* never snap to music for audio locked */
3194                 pf = adjusted_current_frame (event, false);
3195         }
3196
3197         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3198
3199         /* fake marker meeds to stay under the mouse, unlike the real one. */
3200         _marker->set_position (adjusted_current_frame (event, false));
3201
3202         show_verbose_cursor_time (_real_section->frame());
3203 }
3204
3205 void
3206 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3207 {
3208         if (!movement_occurred) {
3209                 if (was_double_click()) {
3210                         _editor->edit_meter_marker (*_marker);
3211                 }
3212                 return;
3213         }
3214
3215         /* reinstate old snap setting */
3216         _editor->set_snap_to (_old_snap_type);
3217
3218         TempoMap& map (_editor->session()->tempo_map());
3219
3220         XMLNode &after = map.get_state();
3221         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3222         _editor->commit_reversible_command ();
3223
3224         // delete the dummy marker we used for visual representation while moving.
3225         // a new visual marker will show up automatically.
3226         delete _marker;
3227 }
3228
3229 void
3230 MeterMarkerDrag::aborted (bool moved)
3231 {
3232         _marker->set_position (_marker->meter().frame ());
3233         if (moved) {
3234                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3235                 // delete the dummy marker we used for visual representation while moving.
3236                 // a new visual marker will show up automatically.
3237                 delete _marker;
3238         }
3239 }
3240
3241 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3242         : Drag (e, i)
3243         , _copy (c)
3244         , before_state (0)
3245 {
3246         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3247
3248         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3249         _real_section = &_marker->tempo();
3250         _movable = _real_section->movable();
3251         assert (_marker);
3252 }
3253
3254 void
3255 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3256 {
3257         Drag::start_grab (event, cursor);
3258         if (!_real_section->active()) {
3259                 show_verbose_cursor_text (_("inactive"));
3260         } else {
3261                 show_verbose_cursor_time (adjusted_current_frame (event));
3262         }
3263 }
3264
3265 void
3266 TempoMarkerDrag::setup_pointer_frame_offset ()
3267 {
3268         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3269 }
3270
3271 void
3272 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3273 {
3274         if (!_real_section->active()) {
3275                 return;
3276         }
3277
3278         if (first_move) {
3279
3280                 // mvc drag - create a dummy marker to catch events, hide it.
3281
3282                 char name[64];
3283                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3284
3285                 TempoSection section (_marker->tempo());
3286
3287                 _marker = new TempoMarker (
3288                         *_editor,
3289                         *_editor->tempo_group,
3290                         UIConfiguration::instance().color ("tempo marker"),
3291                         name,
3292                         *new TempoSection (_marker->tempo())
3293                         );
3294
3295                 /* use the new marker for the grab */
3296                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3297                 _marker->hide();
3298
3299                 TempoMap& map (_editor->session()->tempo_map());
3300                 /* get current state */
3301                 before_state = &map.get_state();
3302
3303                 if (!_copy) {
3304                         _editor->begin_reversible_command (_("move tempo mark"));
3305
3306                 } else {
3307                         const framepos_t frame = adjusted_current_frame (event) + 1;
3308
3309                         _editor->begin_reversible_command (_("copy tempo mark"));
3310
3311                         if (_real_section->position_lock_style() == MusicTime) {
3312                                 _real_section = map.add_tempo (_marker->tempo(), map.pulse_at_frame (frame), 0, _real_section->type(), MusicTime);
3313                         } else {
3314                                 _real_section = map.add_tempo (_marker->tempo(), 0.0, frame, _real_section->type(), AudioTime);
3315                         }
3316                 }
3317
3318         }
3319
3320         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3321                 /* use vertical movement to alter tempo .. should be log */
3322                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3323                 stringstream strs;
3324
3325                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3326                 strs << new_bpm;
3327                 show_verbose_cursor_text (strs.str());
3328
3329         } else if (_movable && !_real_section->locked_to_meter()) {
3330                 TempoMap& map (_editor->session()->tempo_map());
3331                 const bool was_music = _real_section->position_lock_style() == MusicTime;
3332
3333                 const framepos_t pf = adjusted_current_frame (event);
3334
3335                 if (!_editor->snap_musical()) {
3336
3337                         if (was_music) {
3338                                 _real_section->set_position_lock_style (AudioTime);
3339                         }
3340
3341                         map.gui_move_tempo (_real_section, pf);
3342
3343                         if (was_music) {
3344                                 _real_section->set_position_lock_style (MusicTime);
3345                         }
3346
3347                 } else {
3348
3349                         if (!was_music) {
3350                                 _real_section->set_position_lock_style (MusicTime);
3351                         }
3352
3353                         map.gui_move_tempo (_real_section, pf);
3354
3355                         if (!was_music) {
3356                                 _real_section->set_position_lock_style (AudioTime);
3357                         }
3358                 }
3359
3360                 show_verbose_cursor_time (_real_section->frame());
3361         }
3362
3363         /* this has moved the bar lines themselves, so recalibrate the offset */
3364         setup_pointer_frame_offset();
3365
3366         _marker->set_position (adjusted_current_frame (event, false));
3367 }
3368
3369 void
3370 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3371 {
3372         if (!_real_section->active()) {
3373                 return;
3374         }
3375         if (!movement_occurred) {
3376                 if (was_double_click()) {
3377                         _editor->edit_tempo_marker (*_marker);
3378                 }
3379                 return;
3380         }
3381
3382         TempoMap& map (_editor->session()->tempo_map());
3383
3384         XMLNode &after = map.get_state();
3385         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3386         _editor->commit_reversible_command ();
3387
3388         // delete the dummy marker we used for visual representation while moving.
3389         // a new visual marker will show up automatically.
3390         delete _marker;
3391 }
3392
3393 void
3394 TempoMarkerDrag::aborted (bool moved)
3395 {
3396         _marker->set_position (_marker->tempo().frame());
3397         if (moved) {
3398                 TempoMap& map (_editor->session()->tempo_map());
3399                 map.set_state (*before_state, Stateful::current_state_version);
3400                 // delete the dummy marker we used for visual representation while moving.
3401                 // a new visual marker will show up automatically.
3402                 delete _marker;
3403         }
3404 }
3405
3406 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3407         : Drag (e, i)
3408         , _pulse (0.0)
3409         , _beat (0.0)
3410         , _tempo (0)
3411         , before_state (0)
3412 {
3413         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3414
3415 }
3416
3417 void
3418 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3419 {
3420         Drag::start_grab (event, cursor);
3421
3422         TempoMap& map (_editor->session()->tempo_map());
3423         ostringstream sstr;
3424
3425         _tempo = const_cast<TempoSection*> (&map.tempo_section_at_frame (raw_grab_frame()));
3426         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (adjusted_current_frame (event)).beats_per_minute() << "\n";
3427         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3428         show_verbose_cursor_text (sstr.str());
3429         finished (event, false);
3430 }
3431
3432 void
3433 BBTRulerDrag::setup_pointer_frame_offset ()
3434 {
3435         TempoMap& map (_editor->session()->tempo_map());
3436         const double beat_at_frame = map.beat_at_frame (raw_grab_frame());
3437         const uint32_t divisions = _editor->get_grid_beat_divisions (0);
3438         if (divisions > 0) {
3439                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * divisions)) / divisions);
3440         } else {
3441                 /* while it makes some sense for the user to determine the division to 'grab',
3442                    grabbing a bar often leads to confusing results wrt the actual tempo section being altered
3443                    and the result over steep tempo curves. Use sixteenths.
3444                 */
3445                 _beat = floor (beat_at_frame) + (floor (((beat_at_frame - floor (beat_at_frame)) * 4)) / 4);
3446         }
3447         _pulse = map.pulse_at_beat (_beat);
3448         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (_beat);
3449 }
3450
3451 void
3452 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3453 {
3454         TempoMap& map (_editor->session()->tempo_map());
3455
3456         if (first_move) {
3457                 /* get current state */
3458                 before_state = &map.get_state();
3459                 _editor->begin_reversible_command (_("dilate tempo"));
3460         }
3461
3462         framepos_t const pf = adjusted_current_frame (event, false);
3463
3464         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3465                 /* adjust previous tempo to match pointer frame */
3466                 _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_pulse (_pulse), pf, _pulse);
3467         }
3468         ostringstream sstr;
3469         sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (pf).beats_per_minute() << "\n";
3470         sstr << "<" << fixed << setprecision(3) << _tempo->beats_per_minute();
3471         show_verbose_cursor_text (sstr.str());
3472 }
3473
3474 void
3475 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3476 {
3477         if (!movement_occurred) {
3478                 return;
3479         }
3480
3481         TempoMap& map (_editor->session()->tempo_map());
3482
3483         XMLNode &after = map.get_state();
3484         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3485         _editor->commit_reversible_command ();
3486 }
3487
3488 void
3489 BBTRulerDrag::aborted (bool moved)
3490 {
3491         if (moved) {
3492                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3493         }
3494 }
3495
3496
3497 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3498         : Drag (e, &c.track_canvas_item(), false)
3499         , _cursor (c)
3500         , _stop (s)
3501         , _grab_zoom (0.0)
3502 {
3503         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3504 }
3505
3506 /** Do all the things we do when dragging the playhead to make it look as though
3507  *  we have located, without actually doing the locate (because that would cause
3508  *  the diskstream buffers to be refilled, which is too slow).
3509  */
3510 void
3511 CursorDrag::fake_locate (framepos_t t)
3512 {
3513         if (_editor->session () == 0) {
3514                 return;
3515         }
3516
3517         _editor->playhead_cursor->set_position (t);
3518
3519         Session* s = _editor->session ();
3520         if (s->timecode_transmission_suspended ()) {
3521                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3522                 /* This is asynchronous so it will be sent "now"
3523                  */
3524                 s->send_mmc_locate (f);
3525                 /* These are synchronous and will be sent during the next
3526                    process cycle
3527                 */
3528                 s->queue_full_time_code ();
3529                 s->queue_song_position_pointer ();
3530         }
3531
3532         show_verbose_cursor_time (t);
3533         _editor->UpdateAllTransportClocks (t);
3534 }
3535
3536 void
3537 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3538 {
3539         Drag::start_grab (event, c);
3540         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3541
3542         _grab_zoom = _editor->samples_per_pixel;
3543
3544         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3545
3546         _editor->snap_to_with_modifier (where, event);
3547
3548         _editor->_dragging_playhead = true;
3549
3550         Session* s = _editor->session ();
3551
3552         /* grab the track canvas item as well */
3553
3554         _cursor.track_canvas_item().grab();
3555
3556         if (s) {
3557                 if (_was_rolling && _stop) {
3558                         s->request_stop ();
3559                 }
3560
3561                 if (s->is_auditioning()) {
3562                         s->cancel_audition ();
3563                 }
3564
3565
3566                 if (AudioEngine::instance()->connected()) {
3567
3568                         /* do this only if we're the engine is connected
3569                          * because otherwise this request will never be
3570                          * serviced and we'll busy wait forever. likewise,
3571                          * notice if we are disconnected while waiting for the
3572                          * request to be serviced.
3573                          */
3574
3575                         s->request_suspend_timecode_transmission ();
3576                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3577                                 /* twiddle our thumbs */
3578                         }
3579                 }
3580         }
3581
3582         fake_locate (where - snap_delta (event->button.state));
3583 }
3584
3585 void
3586 CursorDrag::motion (GdkEvent* event, bool)
3587 {
3588         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3589         _editor->snap_to_with_modifier (where, event);
3590         if (where != last_pointer_frame()) {
3591                 fake_locate (where - snap_delta (event->button.state));
3592         }
3593 }
3594
3595 void
3596 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3597 {
3598         _editor->_dragging_playhead = false;
3599
3600         _cursor.track_canvas_item().ungrab();
3601
3602         if (!movement_occurred && _stop) {
3603                 return;
3604         }
3605
3606         motion (event, false);
3607
3608         Session* s = _editor->session ();
3609         if (s) {
3610                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3611                 _editor->_pending_locate_request = true;
3612                 s->request_resume_timecode_transmission ();
3613         }
3614 }
3615
3616 void
3617 CursorDrag::aborted (bool)
3618 {
3619         _cursor.track_canvas_item().ungrab();
3620
3621         if (_editor->_dragging_playhead) {
3622                 _editor->session()->request_resume_timecode_transmission ();
3623                 _editor->_dragging_playhead = false;
3624         }
3625
3626         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3627 }
3628
3629 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3630         : RegionDrag (e, i, p, v)
3631 {
3632         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3633 }
3634
3635 void
3636 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3637 {
3638         Drag::start_grab (event, cursor);
3639
3640         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3641         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3642         setup_snap_delta (r->position ());
3643
3644         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3645 }
3646
3647 void
3648 FadeInDrag::setup_pointer_frame_offset ()
3649 {
3650         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3651         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3652         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3653 }
3654
3655 void
3656 FadeInDrag::motion (GdkEvent* event, bool)
3657 {
3658         framecnt_t fade_length;
3659
3660         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3661         _editor->snap_to_with_modifier (pos, event);
3662         pos -= snap_delta (event->button.state);
3663
3664         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3665
3666         if (pos < (region->position() + 64)) {
3667                 fade_length = 64; // this should be a minimum defined somewhere
3668         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3669                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3670         } else {
3671                 fade_length = pos - region->position();
3672         }
3673
3674         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3675
3676                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3677
3678                 if (!tmp) {
3679                         continue;
3680                 }
3681
3682                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3683         }
3684
3685         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3686 }
3687
3688 void
3689 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3690 {
3691         if (!movement_occurred) {
3692                 return;
3693         }
3694
3695         framecnt_t fade_length;
3696         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3697         _editor->snap_to_with_modifier (pos, event);
3698         pos -= snap_delta (event->button.state);
3699
3700         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3701
3702         if (pos < (region->position() + 64)) {
3703                 fade_length = 64; // this should be a minimum defined somewhere
3704         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3705                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3706         } else {
3707                 fade_length = pos - region->position();
3708         }
3709
3710         bool in_command = false;
3711
3712         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3713
3714                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3715
3716                 if (!tmp) {
3717                         continue;
3718                 }
3719
3720                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3721                 XMLNode &before = alist->get_state();
3722
3723                 tmp->audio_region()->set_fade_in_length (fade_length);
3724                 tmp->audio_region()->set_fade_in_active (true);
3725
3726                 if (!in_command) {
3727                         _editor->begin_reversible_command (_("change fade in length"));
3728                         in_command = true;
3729                 }
3730                 XMLNode &after = alist->get_state();
3731                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3732         }
3733
3734         if (in_command) {
3735                 _editor->commit_reversible_command ();
3736         }
3737 }
3738
3739 void
3740 FadeInDrag::aborted (bool)
3741 {
3742         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3743                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3744
3745                 if (!tmp) {
3746                         continue;
3747                 }
3748
3749                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3750         }
3751 }
3752
3753 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3754         : RegionDrag (e, i, p, v)
3755 {
3756         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3757 }
3758
3759 void
3760 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3761 {
3762         Drag::start_grab (event, cursor);
3763
3764         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3765         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3766         setup_snap_delta (r->last_frame ());
3767
3768         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3769 }
3770
3771 void
3772 FadeOutDrag::setup_pointer_frame_offset ()
3773 {
3774         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3775         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3776         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3777 }
3778
3779 void
3780 FadeOutDrag::motion (GdkEvent* event, bool)
3781 {
3782         framecnt_t fade_length;
3783
3784         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3785         _editor->snap_to_with_modifier (pos, event);
3786         pos -= snap_delta (event->button.state);
3787
3788         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3789
3790         if (pos > (region->last_frame() - 64)) {
3791                 fade_length = 64; // this should really be a minimum fade defined somewhere
3792         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3793                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3794         } else {
3795                 fade_length = region->last_frame() - pos;
3796         }
3797
3798         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3799
3800                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3801
3802                 if (!tmp) {
3803                         continue;
3804                 }
3805
3806                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3807         }
3808
3809         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3810 }
3811
3812 void
3813 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3814 {
3815         if (!movement_occurred) {
3816                 return;
3817         }
3818
3819         framecnt_t fade_length;
3820
3821         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3822         _editor->snap_to_with_modifier (pos, event);
3823         pos -= snap_delta (event->button.state);
3824
3825         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3826
3827         if (pos > (region->last_frame() - 64)) {
3828                 fade_length = 64; // this should really be a minimum fade defined somewhere
3829         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3830                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3831         } else {
3832                 fade_length = region->last_frame() - pos;
3833         }
3834
3835         bool in_command = false;
3836
3837         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3838
3839                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3840
3841                 if (!tmp) {
3842                         continue;
3843                 }
3844
3845                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3846                 XMLNode &before = alist->get_state();
3847
3848                 tmp->audio_region()->set_fade_out_length (fade_length);
3849                 tmp->audio_region()->set_fade_out_active (true);
3850
3851                 if (!in_command) {
3852                         _editor->begin_reversible_command (_("change fade out length"));
3853                         in_command = true;
3854                 }
3855                 XMLNode &after = alist->get_state();
3856                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3857         }
3858
3859         if (in_command) {
3860                 _editor->commit_reversible_command ();
3861         }
3862 }
3863
3864 void
3865 FadeOutDrag::aborted (bool)
3866 {
3867         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3868                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3869
3870                 if (!tmp) {
3871                         continue;
3872                 }
3873
3874                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3875         }
3876 }
3877
3878 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3879         : Drag (e, i)
3880         , _selection_changed (false)
3881 {
3882         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3883         Gtk::Window* toplevel = _editor->current_toplevel();
3884         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3885
3886         assert (_marker);
3887
3888         _points.push_back (ArdourCanvas::Duple (0, 0));
3889
3890         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3891 }
3892
3893 MarkerDrag::~MarkerDrag ()
3894 {
3895         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3896                 delete i->location;
3897         }
3898 }
3899
3900 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3901 {
3902         location = new Location (*l);
3903         markers.push_back (m);
3904         move_both = false;
3905 }
3906
3907 void
3908 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3909 {
3910         Drag::start_grab (event, cursor);
3911
3912         bool is_start;
3913
3914         Location *location = _editor->find_location_from_marker (_marker, is_start);
3915         _editor->_dragging_edit_point = true;
3916
3917         update_item (location);
3918
3919         // _drag_line->show();
3920         // _line->raise_to_top();
3921
3922         if (is_start) {
3923                 show_verbose_cursor_time (location->start());
3924         } else {
3925                 show_verbose_cursor_time (location->end());
3926         }
3927         setup_snap_delta (is_start ? location->start() : location->end());
3928
3929         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3930
3931         switch (op) {
3932         case Selection::Toggle:
3933                 /* we toggle on the button release */
3934                 break;
3935         case Selection::Set:
3936                 if (!_editor->selection->selected (_marker)) {
3937                         _editor->selection->set (_marker);
3938                         _selection_changed = true;
3939                 }
3940                 break;
3941         case Selection::Extend:
3942         {
3943                 Locations::LocationList ll;
3944                 list<ArdourMarker*> to_add;
3945                 framepos_t s, e;
3946                 _editor->selection->markers.range (s, e);
3947                 s = min (_marker->position(), s);
3948                 e = max (_marker->position(), e);
3949                 s = min (s, e);
3950                 e = max (s, e);
3951                 if (e < max_framepos) {
3952                         ++e;
3953                 }
3954                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
3955                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
3956                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
3957                         if (lm) {
3958                                 if (lm->start) {
3959                                         to_add.push_back (lm->start);
3960                                 }
3961                                 if (lm->end) {
3962                                         to_add.push_back (lm->end);
3963                                 }
3964                         }
3965                 }
3966                 if (!to_add.empty()) {
3967                         _editor->selection->add (to_add);
3968                         _selection_changed = true;
3969                 }
3970                 break;
3971         }
3972         case Selection::Add:
3973                 _editor->selection->add (_marker);
3974                 _selection_changed = true;
3975
3976                 break;
3977         }
3978
3979         /* Set up copies for us to manipulate during the drag
3980          */
3981
3982         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
3983
3984                 Location* l = _editor->find_location_from_marker (*i, is_start);
3985
3986                 if (!l) {
3987                         continue;
3988                 }
3989
3990                 if (l->is_mark()) {
3991                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
3992                 } else {
3993                         /* range: check that the other end of the range isn't
3994                            already there.
3995                         */
3996                         CopiedLocationInfo::iterator x;
3997                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
3998                                 if (*(*x).location == *l) {
3999                                         break;
4000                                 }
4001                         }
4002                         if (x == _copied_locations.end()) {
4003                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4004                         } else {
4005                                 (*x).markers.push_back (*i);
4006                                 (*x).move_both = true;
4007                         }
4008                 }
4009
4010         }
4011 }
4012
4013 void
4014 MarkerDrag::setup_pointer_frame_offset ()
4015 {
4016         bool is_start;
4017         Location *location = _editor->find_location_from_marker (_marker, is_start);
4018         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4019 }
4020
4021 void
4022 MarkerDrag::motion (GdkEvent* event, bool)
4023 {
4024         framecnt_t f_delta = 0;
4025         bool is_start;
4026         bool move_both = false;
4027         Location *real_location;
4028         Location *copy_location = 0;
4029         framecnt_t const sd = snap_delta (event->button.state);
4030
4031         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4032         framepos_t next = newframe;
4033
4034         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4035                 move_both = true;
4036         }
4037
4038         CopiedLocationInfo::iterator x;
4039
4040         /* find the marker we're dragging, and compute the delta */
4041
4042         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4043
4044                 copy_location = (*x).location;
4045
4046                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4047
4048                         /* this marker is represented by this
4049                          * CopiedLocationMarkerInfo
4050                          */
4051
4052                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4053                                 /* que pasa ?? */
4054                                 return;
4055                         }
4056
4057                         if (real_location->is_mark()) {
4058                                 f_delta = newframe - copy_location->start();
4059                         } else {
4060
4061
4062                                 switch (_marker->type()) {
4063                                 case ArdourMarker::SessionStart:
4064                                 case ArdourMarker::RangeStart:
4065                                 case ArdourMarker::LoopStart:
4066                                 case ArdourMarker::PunchIn:
4067                                         f_delta = newframe - copy_location->start();
4068                                         break;
4069
4070                                 case ArdourMarker::SessionEnd:
4071                                 case ArdourMarker::RangeEnd:
4072                                 case ArdourMarker::LoopEnd:
4073                                 case ArdourMarker::PunchOut:
4074                                         f_delta = newframe - copy_location->end();
4075                                         break;
4076                                 default:
4077                                         /* what kind of marker is this ? */
4078                                         return;
4079                                 }
4080                         }
4081
4082                         break;
4083                 }
4084         }
4085
4086         if (x == _copied_locations.end()) {
4087                 /* hmm, impossible - we didn't find the dragged marker */
4088                 return;
4089         }
4090
4091         /* now move them all */
4092
4093         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4094
4095                 copy_location = x->location;
4096
4097                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4098                         continue;
4099                 }
4100
4101                 if (real_location->locked()) {
4102                         continue;
4103                 }
4104
4105                 if (copy_location->is_mark()) {
4106
4107                         /* now move it */
4108
4109                         copy_location->set_start (copy_location->start() + f_delta);
4110
4111                 } else {
4112
4113                         framepos_t new_start = copy_location->start() + f_delta;
4114                         framepos_t new_end = copy_location->end() + f_delta;
4115
4116                         if (is_start) { // start-of-range marker
4117
4118                                 if (move_both || (*x).move_both) {
4119                                         copy_location->set_start (new_start);
4120                                         copy_location->set_end (new_end);
4121                                 } else  if (new_start < copy_location->end()) {
4122                                         copy_location->set_start (new_start);
4123                                 } else if (newframe > 0) {
4124                                         //_editor->snap_to (next, RoundUpAlways, true);
4125                                         copy_location->set_end (next);
4126                                         copy_location->set_start (newframe);
4127                                 }
4128
4129                         } else { // end marker
4130
4131                                 if (move_both || (*x).move_both) {
4132                                         copy_location->set_end (new_end);
4133                                         copy_location->set_start (new_start);
4134                                 } else if (new_end > copy_location->start()) {
4135                                         copy_location->set_end (new_end);
4136                                 } else if (newframe > 0) {
4137                                         //_editor->snap_to (next, RoundDownAlways, true);
4138                                         copy_location->set_start (next);
4139                                         copy_location->set_end (newframe);
4140                                 }
4141                         }
4142                 }
4143
4144                 update_item (copy_location);
4145
4146                 /* now lookup the actual GUI items used to display this
4147                  * location and move them to wherever the copy of the location
4148                  * is now. This means that the logic in ARDOUR::Location is
4149                  * still enforced, even though we are not (yet) modifying
4150                  * the real Location itself.
4151                  */
4152
4153                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4154
4155                 if (lm) {
4156                         lm->set_position (copy_location->start(), copy_location->end());
4157                 }
4158
4159         }
4160
4161         assert (!_copied_locations.empty());
4162
4163         show_verbose_cursor_time (newframe);
4164 }
4165
4166 void
4167 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4168 {
4169         if (!movement_occurred) {
4170
4171                 if (was_double_click()) {
4172                         _editor->rename_marker (_marker);
4173                         return;
4174                 }
4175
4176                 /* just a click, do nothing but finish
4177                    off the selection process
4178                 */
4179
4180                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4181                 switch (op) {
4182                 case Selection::Set:
4183                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4184                                 _editor->selection->set (_marker);
4185                                 _selection_changed = true;
4186                         }
4187                         break;
4188
4189                 case Selection::Toggle:
4190                         /* we toggle on the button release, click only */
4191                         _editor->selection->toggle (_marker);
4192                         _selection_changed = true;
4193
4194                         break;
4195
4196                 case Selection::Extend:
4197                 case Selection::Add:
4198                         break;
4199                 }
4200
4201                 if (_selection_changed) {
4202                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4203                         _editor->commit_reversible_selection_op();
4204                 }
4205
4206                 return;
4207         }
4208
4209         _editor->_dragging_edit_point = false;
4210
4211         XMLNode &before = _editor->session()->locations()->get_state();
4212         bool in_command = false;
4213
4214         MarkerSelection::iterator i;
4215         CopiedLocationInfo::iterator x;
4216         bool is_start;
4217
4218         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4219              x != _copied_locations.end() && i != _editor->selection->markers.end();
4220              ++i, ++x) {
4221
4222                 Location * location = _editor->find_location_from_marker (*i, is_start);
4223
4224                 if (location) {
4225
4226                         if (location->locked()) {
4227                                 continue;
4228                         }
4229                         if (!in_command) {
4230                                 _editor->begin_reversible_command ( _("move marker") );
4231                                 in_command = true;
4232                         }
4233                         if (location->is_mark()) {
4234                                 location->set_start (((*x).location)->start());
4235                         } else {
4236                                 location->set (((*x).location)->start(), ((*x).location)->end());
4237                         }
4238                 }
4239         }
4240
4241         if (in_command) {
4242                 XMLNode &after = _editor->session()->locations()->get_state();
4243                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4244                 _editor->commit_reversible_command ();
4245         }
4246 }
4247
4248 void
4249 MarkerDrag::aborted (bool movement_occurred)
4250 {
4251         if (!movement_occurred) {
4252                 return;
4253         }
4254
4255         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4256
4257                 /* move all markers to their original location */
4258
4259
4260                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4261
4262                         bool is_start;
4263                         Location * location = _editor->find_location_from_marker (*m, is_start);
4264
4265                         if (location) {
4266                                 (*m)->set_position (is_start ? location->start() : location->end());
4267                         }
4268                 }
4269         }
4270 }
4271
4272 void
4273 MarkerDrag::update_item (Location*)
4274 {
4275         /* noop */
4276 }
4277
4278 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4279         : Drag (e, i)
4280         , _fixed_grab_x (0.0)
4281         , _fixed_grab_y (0.0)
4282         , _cumulative_x_drag (0.0)
4283         , _cumulative_y_drag (0.0)
4284         , _pushing (false)
4285         , _final_index (0)
4286 {
4287         if (_zero_gain_fraction < 0.0) {
4288                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4289         }
4290
4291         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4292
4293         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4294         assert (_point);
4295 }
4296
4297
4298 void
4299 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4300 {
4301         Drag::start_grab (event, _editor->cursors()->fader);
4302
4303         // start the grab at the center of the control point so
4304         // the point doesn't 'jump' to the mouse after the first drag
4305         _fixed_grab_x = _point->get_x();
4306         _fixed_grab_y = _point->get_y();
4307
4308         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4309         setup_snap_delta (pos);
4310
4311         float const fraction = 1 - (_point->get_y() / _point->line().height());
4312         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4313
4314         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4315
4316         if (!_point->can_slide ()) {
4317                 _x_constrained = true;
4318         }
4319 }
4320
4321 void
4322 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4323 {
4324         double dx = _drags->current_pointer_x() - last_pointer_x();
4325         double dy = current_pointer_y() - last_pointer_y();
4326         bool need_snap = true;
4327
4328         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4329                 dx *= 0.1;
4330                 dy *= 0.1;
4331                 need_snap = false;
4332         }
4333
4334         /* coordinate in pixels relative to the start of the region (for region-based automation)
4335            or track (for track-based automation) */
4336         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4337         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4338
4339         // calculate zero crossing point. back off by .01 to stay on the
4340         // positive side of zero
4341         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4342
4343         if (_x_constrained) {
4344                 cx = _fixed_grab_x;
4345         }
4346         if (_y_constrained) {
4347                 cy = _fixed_grab_y;
4348         }
4349
4350         _cumulative_x_drag = cx - _fixed_grab_x;
4351         _cumulative_y_drag = cy - _fixed_grab_y;
4352
4353         cx = max (0.0, cx);
4354         cy = max (0.0, cy);
4355         cy = min ((double) _point->line().height(), cy);
4356
4357         // make sure we hit zero when passing through
4358         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4359                 cy = zero_gain_y;
4360         }
4361
4362         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4363
4364         if (!_x_constrained && need_snap) {
4365                 _editor->snap_to_with_modifier (cx_frames, event);
4366         }
4367
4368         cx_frames -= snap_delta (event->button.state);
4369         cx_frames = min (cx_frames, _point->line().maximum_time());
4370
4371         float const fraction = 1.0 - (cy / _point->line().height());
4372
4373         if (first_motion) {
4374                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4375                 _editor->begin_reversible_command (_("automation event move"));
4376                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4377         }
4378         pair<double, float> result;
4379         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4380
4381         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4382 }
4383
4384 void
4385 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4386 {
4387         if (!movement_occurred) {
4388
4389                 /* just a click */
4390                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4391                         _editor->reset_point_selection ();
4392                 }
4393
4394         } else {
4395                 _point->line().end_drag (_pushing, _final_index);
4396                 _editor->commit_reversible_command ();
4397         }
4398 }
4399
4400 void
4401 ControlPointDrag::aborted (bool)
4402 {
4403         _point->line().reset ();
4404 }
4405
4406 bool
4407 ControlPointDrag::active (Editing::MouseMode m)
4408 {
4409         if (m == Editing::MouseDraw) {
4410                 /* always active in mouse draw */
4411                 return true;
4412         }
4413
4414         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4415         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4416 }
4417
4418 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4419         : Drag (e, i)
4420         , _line (0)
4421         , _fixed_grab_x (0.0)
4422         , _fixed_grab_y (0.0)
4423         , _cumulative_y_drag (0)
4424         , _before (0)
4425         , _after (0)
4426 {
4427         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4428 }
4429
4430 void
4431 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4432 {
4433         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4434         assert (_line);
4435
4436         _item = &_line->grab_item ();
4437
4438         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4439            origin, and ditto for y.
4440         */
4441
4442         double mx = event->button.x;
4443         double my = event->button.y;
4444
4445         _line->grab_item().canvas_to_item (mx, my);
4446
4447         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4448
4449         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4450                 /* no adjacent points */
4451                 return;
4452         }
4453
4454         Drag::start_grab (event, _editor->cursors()->fader);
4455
4456         /* store grab start in item frame */
4457         double const bx = _line->nth (_before)->get_x();
4458         double const ax = _line->nth (_after)->get_x();
4459         double const click_ratio = (ax - mx) / (ax - bx);
4460
4461         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4462
4463         _fixed_grab_x = mx;
4464         _fixed_grab_y = cy;
4465
4466         double fraction = 1.0 - (cy / _line->height());
4467
4468         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4469 }
4470
4471 void
4472 LineDrag::motion (GdkEvent* event, bool first_move)
4473 {
4474         double dy = current_pointer_y() - last_pointer_y();
4475
4476         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4477                 dy *= 0.1;
4478         }
4479
4480         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4481
4482         _cumulative_y_drag = cy - _fixed_grab_y;
4483
4484         cy = max (0.0, cy);
4485         cy = min ((double) _line->height(), cy);
4486
4487         double const fraction = 1.0 - (cy / _line->height());
4488         uint32_t ignored;
4489
4490         if (first_move) {
4491                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4492
4493                 _editor->begin_reversible_command (_("automation range move"));
4494                 _line->start_drag_line (_before, _after, initial_fraction);
4495         }
4496
4497         /* we are ignoring x position for this drag, so we can just pass in anything */
4498         pair<double, float> result;
4499
4500         result = _line->drag_motion (0, fraction, true, false, ignored);
4501         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4502 }
4503
4504 void
4505 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4506 {
4507         if (movement_occurred) {
4508                 motion (event, false);
4509                 _line->end_drag (false, 0);
4510                 _editor->commit_reversible_command ();
4511         } else {
4512                 /* add a new control point on the line */
4513
4514                 AutomationTimeAxisView* atv;
4515
4516                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4517                         framepos_t where = grab_frame ();
4518
4519                         double cx = 0;
4520                         double cy = _fixed_grab_y;
4521
4522                         _line->grab_item().item_to_canvas (cx, cy);
4523
4524                         atv->add_automation_event (event, where, cy, false);
4525                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4526                         AudioRegionView* arv;
4527
4528                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4529                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4530                         }
4531                 }
4532         }
4533 }
4534
4535 void
4536 LineDrag::aborted (bool)
4537 {
4538         _line->reset ();
4539 }
4540
4541 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4542         : Drag (e, i),
4543           _line (0),
4544           _arv (0),
4545           _region_view_grab_x (0.0),
4546           _cumulative_x_drag (0),
4547           _before (0.0),
4548           _max_x (0)
4549 {
4550         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4551 }
4552
4553 void
4554 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4555 {
4556         Drag::start_grab (event);
4557
4558         _line = reinterpret_cast<Line*> (_item);
4559         assert (_line);
4560
4561         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4562
4563         double cx = event->button.x;
4564         double cy = event->button.y;
4565
4566         _item->parent()->canvas_to_item (cx, cy);
4567
4568         /* store grab start in parent frame */
4569         _region_view_grab_x = cx;
4570
4571         _before = *(float*) _item->get_data ("position");
4572
4573         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4574
4575         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4576 }
4577
4578 void
4579 FeatureLineDrag::motion (GdkEvent*, bool)
4580 {
4581         double dx = _drags->current_pointer_x() - last_pointer_x();
4582
4583         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4584
4585         _cumulative_x_drag += dx;
4586
4587         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4588
4589         if (cx > _max_x){
4590                 cx = _max_x;
4591         }
4592         else if(cx < 0){
4593                 cx = 0;
4594         }
4595
4596         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4597         assert (bbox);
4598         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4599
4600         float *pos = new float;
4601         *pos = cx;
4602
4603         _line->set_data ("position", pos);
4604
4605         _before = cx;
4606 }
4607
4608 void
4609 FeatureLineDrag::finished (GdkEvent*, bool)
4610 {
4611         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4612         _arv->update_transient(_before, _before);
4613 }
4614
4615 void
4616 FeatureLineDrag::aborted (bool)
4617 {
4618         //_line->reset ();
4619 }
4620
4621 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4622         : Drag (e, i)
4623         , _vertical_only (false)
4624 {
4625         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4626 }
4627
4628 void
4629 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4630 {
4631         Drag::start_grab (event);
4632         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4633 }
4634
4635 void
4636 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4637 {
4638         framepos_t start;
4639         framepos_t end;
4640         double y1;
4641         double y2;
4642
4643         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4644
4645         framepos_t grab = grab_frame ();
4646         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4647                 _editor->snap_to_with_modifier (grab, event);
4648         } else {
4649                 grab = raw_grab_frame ();
4650         }
4651
4652         /* base start and end on initial click position */
4653
4654         if (pf < grab) {
4655                 start = pf;
4656                 end = grab;
4657         } else {
4658                 end = pf;
4659                 start = grab;
4660         }
4661
4662         if (current_pointer_y() < grab_y()) {
4663                 y1 = current_pointer_y();
4664                 y2 = grab_y();
4665         } else {
4666                 y2 = current_pointer_y();
4667                 y1 = grab_y();
4668         }
4669
4670         if (start != end || y1 != y2) {
4671
4672                 double x1 = _editor->sample_to_pixel (start);
4673                 double x2 = _editor->sample_to_pixel (end);
4674                 const double min_dimension = 2.0;
4675
4676                 if (_vertical_only) {
4677                         /* fixed 10 pixel width */
4678                         x2 = x1 + 10;
4679                 } else {
4680                         if (x2 < x1) {
4681                                 x2 = min (x1 - min_dimension, x2);
4682                         } else {
4683                                 x2 = max (x1 + min_dimension, x2);
4684                         }
4685                 }
4686
4687                 if (y2 < y1) {
4688                         y2 = min (y1 - min_dimension, y2);
4689                 } else {
4690                         y2 = max (y1 + min_dimension, y2);
4691                 }
4692
4693                 /* translate rect into item space and set */
4694
4695                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4696
4697                 /* this drag is a _trackview_only == true drag, so the y1 and
4698                  * y2 (computed using current_pointer_y() and grab_y()) will be
4699                  * relative to the top of the trackview group). The
4700                  * rubberband rect has the same parent/scroll offset as the
4701                  * the trackview group, so we can use the "r" rect directly
4702                  * to set the shape of the rubberband.
4703                  */
4704
4705                 _editor->rubberband_rect->set (r);
4706                 _editor->rubberband_rect->show();
4707                 _editor->rubberband_rect->raise_to_top();
4708
4709                 show_verbose_cursor_time (pf);
4710
4711                 do_select_things (event, true);
4712         }
4713 }
4714
4715 void
4716 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4717 {
4718         framepos_t x1;
4719         framepos_t x2;
4720         framepos_t grab = grab_frame ();
4721         framepos_t lpf = last_pointer_frame ();
4722
4723         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4724                 grab = raw_grab_frame ();
4725                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4726         }
4727
4728         if (grab < lpf) {
4729                 x1 = grab;
4730                 x2 = lpf;
4731         } else {
4732                 x2 = grab;
4733                 x1 = lpf;
4734         }
4735
4736         double y1;
4737         double y2;
4738
4739         if (current_pointer_y() < grab_y()) {
4740                 y1 = current_pointer_y();
4741                 y2 = grab_y();
4742         } else {
4743                 y2 = current_pointer_y();
4744                 y1 = grab_y();
4745         }
4746
4747         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4748 }
4749
4750 void
4751 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4752 {
4753         if (movement_occurred) {
4754
4755                 motion (event, false);
4756                 do_select_things (event, false);
4757
4758         } else {
4759
4760                 /* just a click */
4761
4762                 bool do_deselect = true;
4763                 MidiTimeAxisView* mtv;
4764
4765                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4766                         /* MIDI track */
4767                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4768                                 /* nothing selected */
4769                                 add_midi_region (mtv, true);
4770                                 do_deselect = false;
4771                         }
4772                 }
4773
4774                 /* do not deselect if Primary or Tertiary (toggle-select or
4775                  * extend-select are pressed.
4776                  */
4777
4778                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4779                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4780                     do_deselect) {
4781                         deselect_things ();
4782                 }
4783
4784         }
4785
4786         _editor->rubberband_rect->hide();
4787 }
4788
4789 void
4790 RubberbandSelectDrag::aborted (bool)
4791 {
4792         _editor->rubberband_rect->hide ();
4793 }
4794
4795 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4796         : RegionDrag (e, i, p, v)
4797 {
4798         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4799 }
4800
4801 void
4802 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4803 {
4804         Drag::start_grab (event, cursor);
4805
4806         _editor->get_selection().add (_primary);
4807
4808         framepos_t where = _primary->region()->position();
4809         setup_snap_delta (where);
4810
4811         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4812 }
4813
4814 void
4815 TimeFXDrag::motion (GdkEvent* event, bool)
4816 {
4817         RegionView* rv = _primary;
4818         StreamView* cv = rv->get_time_axis_view().view ();
4819
4820         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4821         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4822         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4823         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4824         _editor->snap_to_with_modifier (pf, event);
4825         pf -= snap_delta (event->button.state);
4826
4827         if (pf > rv->region()->position()) {
4828                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4829         }
4830
4831         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4832 }
4833
4834 void
4835 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4836 {
4837         /* this may have been a single click, no drag. We still want the dialog
4838            to show up in that case, so that the user can manually edit the
4839            parameters for the timestretch.
4840         */
4841
4842         float fraction = 1.0;
4843
4844         if (movement_occurred) {
4845
4846                 motion (event, false);
4847
4848                 _primary->get_time_axis_view().hide_timestretch ();
4849
4850                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4851
4852                 if (adjusted_frame_pos < _primary->region()->position()) {
4853                         /* backwards drag of the left edge - not usable */
4854                         return;
4855                 }
4856
4857                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4858
4859                 fraction = (double) newlen / (double) _primary->region()->length();
4860
4861 #ifndef USE_RUBBERBAND
4862                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4863                 if (_primary->region()->data_type() == DataType::AUDIO) {
4864                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4865                 }
4866 #endif
4867         }
4868
4869         if (!_editor->get_selection().regions.empty()) {
4870                 /* primary will already be included in the selection, and edit
4871                    group shared editing will propagate selection across
4872                    equivalent regions, so just use the current region
4873                    selection.
4874                 */
4875
4876                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4877                         error << _("An error occurred while executing time stretch operation") << endmsg;
4878                 }
4879         }
4880 }
4881
4882 void
4883 TimeFXDrag::aborted (bool)
4884 {
4885         _primary->get_time_axis_view().hide_timestretch ();
4886 }
4887
4888 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4889         : Drag (e, i)
4890 {
4891         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4892 }
4893
4894 void
4895 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4896 {
4897         Drag::start_grab (event);
4898 }
4899
4900 void
4901 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4902 {
4903         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4904 }
4905
4906 void
4907 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4908 {
4909         if (movement_occurred && _editor->session()) {
4910                 /* make sure we stop */
4911                 _editor->session()->request_transport_speed (0.0);
4912         }
4913 }
4914
4915 void
4916 ScrubDrag::aborted (bool)
4917 {
4918         /* XXX: TODO */
4919 }
4920
4921 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4922         : Drag (e, i)
4923         , _operation (o)
4924         , _add (false)
4925         , _time_selection_at_start (!_editor->get_selection().time.empty())
4926 {
4927         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4928
4929         if (_time_selection_at_start) {
4930                 start_at_start = _editor->get_selection().time.start();
4931                 end_at_start = _editor->get_selection().time.end_frame();
4932         }
4933 }
4934
4935 void
4936 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4937 {
4938         if (_editor->session() == 0) {
4939                 return;
4940         }
4941
4942         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4943
4944         switch (_operation) {
4945         case CreateSelection:
4946                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4947                         _add = true;
4948                 } else {
4949                         _add = false;
4950                 }
4951                 cursor = _editor->cursors()->selector;
4952                 Drag::start_grab (event, cursor);
4953                 break;
4954
4955         case SelectionStartTrim:
4956                 if (_editor->clicked_axisview) {
4957                         _editor->clicked_axisview->order_selection_trims (_item, true);
4958                 }
4959                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
4960                 break;
4961
4962         case SelectionEndTrim:
4963                 if (_editor->clicked_axisview) {
4964                         _editor->clicked_axisview->order_selection_trims (_item, false);
4965                 }
4966                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
4967                 break;
4968
4969         case SelectionMove:
4970                 Drag::start_grab (event, cursor);
4971                 break;
4972
4973         case SelectionExtend:
4974                 Drag::start_grab (event, cursor);
4975                 break;
4976         }
4977
4978         if (_operation == SelectionMove) {
4979                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
4980         } else {
4981                 show_verbose_cursor_time (adjusted_current_frame (event));
4982         }
4983 }
4984
4985 void
4986 SelectionDrag::setup_pointer_frame_offset ()
4987 {
4988         switch (_operation) {
4989         case CreateSelection:
4990                 _pointer_frame_offset = 0;
4991                 break;
4992
4993         case SelectionStartTrim:
4994         case SelectionMove:
4995                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
4996                 break;
4997
4998         case SelectionEndTrim:
4999                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5000                 break;
5001
5002         case SelectionExtend:
5003                 break;
5004         }
5005 }
5006
5007 void
5008 SelectionDrag::motion (GdkEvent* event, bool first_move)
5009 {
5010         framepos_t start = 0;
5011         framepos_t end = 0;
5012         framecnt_t length = 0;
5013         framecnt_t distance = 0;
5014
5015         framepos_t const pending_position = adjusted_current_frame (event);
5016
5017         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5018                 return;
5019         }
5020
5021         switch (_operation) {
5022         case CreateSelection:
5023         {
5024                 framepos_t grab = grab_frame ();
5025
5026                 if (first_move) {
5027                         grab = adjusted_current_frame (event, false);
5028                         if (grab < pending_position) {
5029                                 _editor->snap_to (grab, RoundDownMaybe);
5030                         }  else {
5031                                 _editor->snap_to (grab, RoundUpMaybe);
5032                         }
5033                 }
5034
5035                 if (pending_position < grab) {
5036                         start = pending_position;
5037                         end = grab;
5038                 } else {
5039                         end = pending_position;
5040                         start = grab;
5041                 }
5042
5043                 /* first drag: Either add to the selection
5044                    or create a new selection
5045                 */
5046
5047                 if (first_move) {
5048
5049                         if (_add) {
5050
5051                                 /* adding to the selection */
5052                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5053                                 _editor->clicked_selection = _editor->selection->add (start, end);
5054                                 _add = false;
5055
5056                         } else {
5057
5058                                 /* new selection */
5059
5060                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5061                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5062                                 }
5063
5064                                 _editor->clicked_selection = _editor->selection->set (start, end);
5065                         }
5066                 }
5067
5068                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5069                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5070                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5071                 if (atest) {
5072                         _editor->selection->add (atest);
5073                         break;
5074                 }
5075
5076                 /* select all tracks within the rectangle that we've marked out so far */
5077                 TrackViewList new_selection;
5078                 TrackViewList& all_tracks (_editor->track_views);
5079
5080                 ArdourCanvas::Coord const top = grab_y();
5081                 ArdourCanvas::Coord const bottom = current_pointer_y();
5082
5083                 if (top >= 0 && bottom >= 0) {
5084
5085                         //first, find the tracks that are covered in the y range selection
5086                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5087                                 if ((*i)->covered_by_y_range (top, bottom)) {
5088                                         new_selection.push_back (*i);
5089                                 }
5090                         }
5091
5092                         //now find any tracks that are GROUPED with the tracks we selected
5093                         TrackViewList grouped_add = new_selection;
5094                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5095                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5096                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5097                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5098                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5099                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5100                                                         grouped_add.push_back (*j);
5101                                         }
5102                                 }
5103                         }
5104
5105                         //now compare our list with the current selection, and add or remove as necessary
5106                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5107                         TrackViewList tracks_to_add;
5108                         TrackViewList tracks_to_remove;
5109                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5110                                 if ( !_editor->selection->tracks.contains ( *i ) )
5111                                         tracks_to_add.push_back ( *i );
5112                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5113                                 if ( !grouped_add.contains ( *i ) )
5114                                         tracks_to_remove.push_back ( *i );
5115                         _editor->selection->add(tracks_to_add);
5116                         _editor->selection->remove(tracks_to_remove);
5117
5118                 }
5119         }
5120         break;
5121
5122         case SelectionStartTrim:
5123
5124                 end = _editor->selection->time[_editor->clicked_selection].end;
5125
5126                 if (pending_position > end) {
5127                         start = end;
5128                 } else {
5129                         start = pending_position;
5130                 }
5131                 break;
5132
5133         case SelectionEndTrim:
5134
5135                 start = _editor->selection->time[_editor->clicked_selection].start;
5136
5137                 if (pending_position < start) {
5138                         end = start;
5139                 } else {
5140                         end = pending_position;
5141                 }
5142
5143                 break;
5144
5145         case SelectionMove:
5146
5147                 start = _editor->selection->time[_editor->clicked_selection].start;
5148                 end = _editor->selection->time[_editor->clicked_selection].end;
5149
5150                 length = end - start;
5151                 distance = pending_position - start;
5152                 start = pending_position;
5153                 _editor->snap_to (start);
5154
5155                 end = start + length;
5156
5157                 break;
5158
5159         case SelectionExtend:
5160                 break;
5161         }
5162
5163         if (start != end) {
5164                 switch (_operation) {
5165                 case SelectionMove:
5166                         if (_time_selection_at_start) {
5167                                 _editor->selection->move_time (distance);
5168                         }
5169                         break;
5170                 default:
5171                         _editor->selection->replace (_editor->clicked_selection, start, end);
5172                 }
5173         }
5174
5175         if (_operation == SelectionMove) {
5176                 show_verbose_cursor_time(start);
5177         } else {
5178                 show_verbose_cursor_time(pending_position);
5179         }
5180 }
5181
5182 void
5183 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5184 {
5185         Session* s = _editor->session();
5186
5187         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5188         if (movement_occurred) {
5189                 motion (event, false);
5190                 /* XXX this is not object-oriented programming at all. ick */
5191                 if (_editor->selection->time.consolidate()) {
5192                         _editor->selection->TimeChanged ();
5193                 }
5194
5195                 /* XXX what if its a music time selection? */
5196                 if (s) {
5197                         if (s->get_play_range() && s->transport_rolling()) {
5198                                 s->request_play_range (&_editor->selection->time, true);
5199                         } else if (!s->config.get_external_sync()) {
5200                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5201                                         if (_operation == SelectionEndTrim)
5202                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5203                                         else
5204                                                 s->request_locate (_editor->get_selection().time.start());
5205                                 }
5206                         }
5207
5208                         if (_editor->get_selection().time.length() != 0) {
5209                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5210                         } else {
5211                                 s->clear_range_selection ();
5212                         }
5213                 }
5214
5215         } else {
5216                 /* just a click, no pointer movement.
5217                  */
5218
5219                 if (_operation == SelectionExtend) {
5220                         if (_time_selection_at_start) {
5221                                 framepos_t pos = adjusted_current_frame (event, false);
5222                                 framepos_t start = min (pos, start_at_start);
5223                                 framepos_t end = max (pos, end_at_start);
5224                                 _editor->selection->set (start, end);
5225                         }
5226                 } else {
5227                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5228                                 if (_editor->clicked_selection) {
5229                                         _editor->selection->remove (_editor->clicked_selection);
5230                                 }
5231                         } else {
5232                                 if (!_editor->clicked_selection) {
5233                                         _editor->selection->clear_time();
5234                                 }
5235                         }
5236                 }
5237
5238                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5239                         _editor->selection->set (_editor->clicked_axisview);
5240                 }
5241
5242                 if (s && s->get_play_range () && s->transport_rolling()) {
5243                         s->request_stop (false, false);
5244                 }
5245
5246         }
5247
5248         _editor->stop_canvas_autoscroll ();
5249         _editor->clicked_selection = 0;
5250         _editor->commit_reversible_selection_op ();
5251 }
5252
5253 void
5254 SelectionDrag::aborted (bool)
5255 {
5256         /* XXX: TODO */
5257 }
5258
5259 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5260         : Drag (e, i, false),
5261           _operation (o),
5262           _copy (false)
5263 {
5264         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5265
5266         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5267                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5268                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5269         _drag_rect->hide ();
5270
5271         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5272         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5273 }
5274
5275 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5276 {
5277         /* normal canvas items will be cleaned up when their parent group is deleted. But
5278            this item is created as the child of a long-lived parent group, and so we
5279            need to explicitly delete it.
5280         */
5281         delete _drag_rect;
5282 }
5283
5284 void
5285 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5286 {
5287         if (_editor->session() == 0) {
5288                 return;
5289         }
5290
5291         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5292
5293         if (!_editor->temp_location) {
5294                 _editor->temp_location = new Location (*_editor->session());
5295         }
5296
5297         switch (_operation) {
5298         case CreateSkipMarker:
5299         case CreateRangeMarker:
5300         case CreateTransportMarker:
5301         case CreateCDMarker:
5302
5303                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5304                         _copy = true;
5305                 } else {
5306                         _copy = false;
5307                 }
5308                 cursor = _editor->cursors()->selector;
5309                 break;
5310         }
5311
5312         Drag::start_grab (event, cursor);
5313
5314         show_verbose_cursor_time (adjusted_current_frame (event));
5315 }
5316
5317 void
5318 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5319 {
5320         framepos_t start = 0;
5321         framepos_t end = 0;
5322         ArdourCanvas::Rectangle *crect;
5323
5324         switch (_operation) {
5325         case CreateSkipMarker:
5326                 crect = _editor->range_bar_drag_rect;
5327                 break;
5328         case CreateRangeMarker:
5329                 crect = _editor->range_bar_drag_rect;
5330                 break;
5331         case CreateTransportMarker:
5332                 crect = _editor->transport_bar_drag_rect;
5333                 break;
5334         case CreateCDMarker:
5335                 crect = _editor->cd_marker_bar_drag_rect;
5336                 break;
5337         default:
5338                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5339                 return;
5340                 break;
5341         }
5342
5343         framepos_t const pf = adjusted_current_frame (event);
5344
5345         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5346                 framepos_t grab = grab_frame ();
5347                 _editor->snap_to (grab);
5348
5349                 if (pf < grab_frame()) {
5350                         start = pf;
5351                         end = grab;
5352                 } else {
5353                         end = pf;
5354                         start = grab;
5355                 }
5356
5357                 /* first drag: Either add to the selection
5358                    or create a new selection.
5359                 */
5360
5361                 if (first_move) {
5362
5363                         _editor->temp_location->set (start, end);
5364
5365                         crect->show ();
5366
5367                         update_item (_editor->temp_location);
5368                         _drag_rect->show();
5369                         //_drag_rect->raise_to_top();
5370
5371                 }
5372         }
5373
5374         if (start != end) {
5375                 _editor->temp_location->set (start, end);
5376
5377                 double x1 = _editor->sample_to_pixel (start);
5378                 double x2 = _editor->sample_to_pixel (end);
5379                 crect->set_x0 (x1);
5380                 crect->set_x1 (x2);
5381
5382                 update_item (_editor->temp_location);
5383         }
5384
5385         show_verbose_cursor_time (pf);
5386
5387 }
5388
5389 void
5390 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5391 {
5392         Location * newloc = 0;
5393         string rangename;
5394         int flags;
5395
5396         if (movement_occurred) {
5397                 motion (event, false);
5398                 _drag_rect->hide();
5399
5400                 switch (_operation) {
5401                 case CreateSkipMarker:
5402                 case CreateRangeMarker:
5403                 case CreateCDMarker:
5404                     {
5405                         XMLNode &before = _editor->session()->locations()->get_state();
5406                         if (_operation == CreateSkipMarker) {
5407                                 _editor->begin_reversible_command (_("new skip marker"));
5408                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5409                                 flags = Location::IsRangeMarker | Location::IsSkip;
5410                                 _editor->range_bar_drag_rect->hide();
5411                         } else if (_operation == CreateCDMarker) {
5412                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5413                                 _editor->begin_reversible_command (_("new CD marker"));
5414                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5415                                 _editor->cd_marker_bar_drag_rect->hide();
5416                         } else {
5417                                 _editor->begin_reversible_command (_("new skip marker"));
5418                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5419                                 flags = Location::IsRangeMarker;
5420                                 _editor->range_bar_drag_rect->hide();
5421                         }
5422                         newloc = new Location (
5423                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5424                                 );
5425
5426                         _editor->session()->locations()->add (newloc, true);
5427                         XMLNode &after = _editor->session()->locations()->get_state();
5428                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5429                         _editor->commit_reversible_command ();
5430                         break;
5431                     }
5432
5433                 case CreateTransportMarker:
5434                         // popup menu to pick loop or punch
5435                         _editor->new_transport_marker_context_menu (&event->button, _item);
5436                         break;
5437                 }
5438
5439         } else {
5440
5441                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5442
5443                 if (_operation == CreateTransportMarker) {
5444
5445                         /* didn't drag, so just locate */
5446
5447                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5448
5449                 } else if (_operation == CreateCDMarker) {
5450
5451                         /* didn't drag, but mark is already created so do
5452                          * nothing */
5453
5454                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5455
5456                         framepos_t start;
5457                         framepos_t end;
5458
5459                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5460
5461                         if (end == max_framepos) {
5462                                 end = _editor->session()->current_end_frame ();
5463                         }
5464
5465                         if (start == max_framepos) {
5466                                 start = _editor->session()->current_start_frame ();
5467                         }
5468
5469                         switch (_editor->mouse_mode) {
5470                         case MouseObject:
5471                                 /* find the two markers on either side and then make the selection from it */
5472                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5473                                 break;
5474
5475                         case MouseRange:
5476                                 /* find the two markers on either side of the click and make the range out of it */
5477                                 _editor->selection->set (start, end);
5478                                 break;
5479
5480                         default:
5481                                 break;
5482                         }
5483                 }
5484         }
5485
5486         _editor->stop_canvas_autoscroll ();
5487 }
5488
5489 void
5490 RangeMarkerBarDrag::aborted (bool movement_occurred)
5491 {
5492         if (movement_occurred) {
5493                 _drag_rect->hide ();
5494         }
5495 }
5496
5497 void
5498 RangeMarkerBarDrag::update_item (Location* location)
5499 {
5500         double const x1 = _editor->sample_to_pixel (location->start());
5501         double const x2 = _editor->sample_to_pixel (location->end());
5502
5503         _drag_rect->set_x0 (x1);
5504         _drag_rect->set_x1 (x2);
5505 }
5506
5507 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5508         : Drag (e, i)
5509         , _cumulative_dx (0)
5510         , _cumulative_dy (0)
5511         , _was_selected (false)
5512 {
5513         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5514
5515         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5516         assert (_primary);
5517         _region = &_primary->region_view ();
5518         _note_height = _region->midi_stream_view()->note_height ();
5519 }
5520
5521 void
5522 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5523 {
5524         Drag::start_grab (event);
5525         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5526
5527         if (!(_was_selected = _primary->selected())) {
5528
5529                 /* tertiary-click means extend selection - we'll do that on button release,
5530                    so don't add it here, because otherwise we make it hard to figure
5531                    out the "extend-to" range.
5532                 */
5533
5534                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5535
5536                 if (!extend) {
5537                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5538
5539                         if (add) {
5540                                 _region->note_selected (_primary, true);
5541                         } else {
5542                                 _editor->get_selection().clear_points();
5543                                 _region->unique_select (_primary);
5544                         }
5545                 }
5546         }
5547 }
5548
5549 /** @return Current total drag x change in frames */
5550 frameoffset_t
5551 NoteDrag::total_dx (const guint state) const
5552 {
5553         /* dx in frames */
5554         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5555
5556         /* primary note time */
5557         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5558
5559         /* new time of the primary note in session frames */
5560         frameoffset_t st = n + dx + snap_delta (state);
5561
5562         framepos_t const rp = _region->region()->position ();
5563
5564         /* prevent the note being dragged earlier than the region's position */
5565         st = max (st, rp);
5566
5567         /* possibly snap and return corresponding delta */
5568
5569         bool snap = true;
5570
5571         if (ArdourKeyboard::indicates_snap (state)) {
5572                 if (_editor->snap_mode () != SnapOff) {
5573                         snap = false;
5574                 }
5575         } else {
5576                 if (_editor->snap_mode () == SnapOff) {
5577                         snap = false;
5578                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5579                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5580                                 snap = true;
5581                         }
5582                 }
5583         }
5584
5585         frameoffset_t ret;
5586         if (snap) {
5587                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5588                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5589         } else {
5590                 ret = st - n - snap_delta (state);
5591         }
5592         return ret;
5593 }
5594
5595 /** @return Current total drag y change in note number */
5596 int8_t
5597 NoteDrag::total_dy () const
5598 {
5599         MidiStreamView* msv = _region->midi_stream_view ();
5600         double const y = _region->midi_view()->y_position ();
5601         /* new current note */
5602         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5603         /* clamp */
5604         n = max (msv->lowest_note(), n);
5605         n = min (msv->highest_note(), n);
5606         /* and work out delta */
5607         return n - msv->y_to_note (grab_y() - y);
5608 }
5609
5610 void
5611 NoteDrag::motion (GdkEvent * event, bool)
5612 {
5613         /* Total change in x and y since the start of the drag */
5614         frameoffset_t const dx = total_dx (event->button.state);
5615         int8_t const dy = total_dy ();
5616
5617         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5618         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5619         double const tdy = -dy * _note_height - _cumulative_dy;
5620
5621         if (tdx || tdy) {
5622                 _cumulative_dx += tdx;
5623                 _cumulative_dy += tdy;
5624
5625                 int8_t note_delta = total_dy();
5626
5627                 _region->move_selection (tdx, tdy, note_delta);
5628
5629                 /* the new note value may be the same as the old one, but we
5630                  * don't know what that means because the selection may have
5631                  * involved more than one note and we might be doing something
5632                  * odd with them. so show the note value anyway, always.
5633                  */
5634
5635                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5636
5637                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5638         }
5639 }
5640
5641 void
5642 NoteDrag::finished (GdkEvent* ev, bool moved)
5643 {
5644         if (!moved) {
5645                 /* no motion - select note */
5646
5647                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5648                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5649
5650                         bool changed = false;
5651
5652                         if (_was_selected) {
5653                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5654                                 if (add) {
5655                                         _region->note_deselected (_primary);
5656                                         changed = true;
5657                                 } else {
5658                                         _editor->get_selection().clear_points();
5659                                         _region->unique_select (_primary);
5660                                         changed = true;
5661                                 }
5662                         } else {
5663                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5664                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5665
5666                                 if (!extend && !add && _region->selection_size() > 1) {
5667                                         _editor->get_selection().clear_points();
5668                                         _region->unique_select (_primary);
5669                                         changed = true;
5670                                 } else if (extend) {
5671                                         _region->note_selected (_primary, true, true);
5672                                         changed = true;
5673                                 } else {
5674                                         /* it was added during button press */
5675                                         changed = true;
5676
5677                                 }
5678                         }
5679
5680                         if (changed) {
5681                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5682                                 _editor->commit_reversible_selection_op();
5683                         }
5684                 }
5685         } else {
5686                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5687         }
5688 }
5689
5690 void
5691 NoteDrag::aborted (bool)
5692 {
5693         /* XXX: TODO */
5694 }
5695
5696 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5697 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5698         : Drag (editor, atv->base_item ())
5699         , _ranges (r)
5700         , _y_origin (atv->y_position())
5701         , _nothing_to_drag (false)
5702 {
5703         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5704         setup (atv->lines ());
5705 }
5706
5707 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5708 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5709         : Drag (editor, rv->get_canvas_group ())
5710         , _ranges (r)
5711         , _y_origin (rv->get_time_axis_view().y_position())
5712         , _nothing_to_drag (false)
5713         , _integral (false)
5714 {
5715         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5716
5717         list<boost::shared_ptr<AutomationLine> > lines;
5718
5719         AudioRegionView*      audio_view;
5720         AutomationRegionView* automation_view;
5721         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5722                 lines.push_back (audio_view->get_gain_line ());
5723         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5724                 lines.push_back (automation_view->line ());
5725                 _integral = true;
5726         } else {
5727                 error << _("Automation range drag created for invalid region type") << endmsg;
5728         }
5729
5730         setup (lines);
5731 }
5732
5733 /** @param lines AutomationLines to drag.
5734  *  @param offset Offset from the session start to the points in the AutomationLines.
5735  */
5736 void
5737 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5738 {
5739         /* find the lines that overlap the ranges being dragged */
5740         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5741         while (i != lines.end ()) {
5742                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5743                 ++j;
5744
5745                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5746
5747                 /* check this range against all the AudioRanges that we are using */
5748                 list<AudioRange>::const_iterator k = _ranges.begin ();
5749                 while (k != _ranges.end()) {
5750                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5751                                 break;
5752                         }
5753                         ++k;
5754                 }
5755
5756                 /* add it to our list if it overlaps at all */
5757                 if (k != _ranges.end()) {
5758                         Line n;
5759                         n.line = *i;
5760                         n.state = 0;
5761                         n.range = r;
5762                         _lines.push_back (n);
5763                 }
5764
5765                 i = j;
5766         }
5767
5768         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5769 }
5770
5771 double
5772 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5773 {
5774         return 1.0 - ((global_y - _y_origin) / line->height());
5775 }
5776
5777 double
5778 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5779 {
5780         const double v = list->eval(x);
5781         return _integral ? rint(v) : v;
5782 }
5783
5784 void
5785 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5786 {
5787         Drag::start_grab (event, cursor);
5788
5789         /* Get line states before we start changing things */
5790         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5791                 i->state = &i->line->get_state ();
5792                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5793         }
5794
5795         if (_ranges.empty()) {
5796
5797                 /* No selected time ranges: drag all points */
5798                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5799                         uint32_t const N = i->line->npoints ();
5800                         for (uint32_t j = 0; j < N; ++j) {
5801                                 i->points.push_back (i->line->nth (j));
5802                         }
5803                 }
5804
5805         }
5806
5807         if (_nothing_to_drag) {
5808                 return;
5809         }
5810 }
5811
5812 void
5813 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5814 {
5815         if (_nothing_to_drag && !first_move) {
5816                 return;
5817         }
5818
5819         if (first_move) {
5820                 _editor->begin_reversible_command (_("automation range move"));
5821
5822                 if (!_ranges.empty()) {
5823
5824                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5825
5826                                 framecnt_t const half = (i->start + i->end) / 2;
5827
5828                                 /* find the line that this audio range starts in */
5829                                 list<Line>::iterator j = _lines.begin();
5830                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5831                                         ++j;
5832                                 }
5833
5834                                 if (j != _lines.end()) {
5835                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5836
5837                                 /* j is the line that this audio range starts in; fade into it;
5838                                    64 samples length plucked out of thin air.
5839                                 */
5840
5841                                         framepos_t a = i->start + 64;
5842                                         if (a > half) {
5843                                                 a = half;
5844                                         }
5845
5846                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5847                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5848
5849                                         XMLNode &before = the_list->get_state();
5850                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5851                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5852
5853                                         if (add_p || add_q) {
5854                                                 _editor->session()->add_command (
5855                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5856                                         }
5857                                 }
5858
5859                                 /* same thing for the end */
5860
5861                                 j = _lines.begin();
5862                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5863                                         ++j;
5864                                 }
5865
5866                                 if (j != _lines.end()) {
5867                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5868
5869                                         /* j is the line that this audio range starts in; fade out of it;
5870                                            64 samples length plucked out of thin air.
5871                                         */
5872
5873                                         framepos_t b = i->end - 64;
5874                                         if (b < half) {
5875                                                 b = half;
5876                                         }
5877
5878                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5879                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5880
5881                                         XMLNode &before = the_list->get_state();
5882                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5883                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5884
5885                                         if (add_p || add_q) {
5886                                                 _editor->session()->add_command (
5887                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5888                                         }
5889                                 }
5890                         }
5891
5892                         _nothing_to_drag = true;
5893
5894                         /* Find all the points that should be dragged and put them in the relevant
5895                            points lists in the Line structs.
5896                         */
5897
5898                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5899
5900                                 uint32_t const N = i->line->npoints ();
5901                                 for (uint32_t j = 0; j < N; ++j) {
5902
5903                                         /* here's a control point on this line */
5904                                         ControlPoint* p = i->line->nth (j);
5905                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5906
5907                                         /* see if it's inside a range */
5908                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5909                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5910                                                 ++k;
5911                                         }
5912
5913                                         if (k != _ranges.end()) {
5914                                                 /* dragging this point */
5915                                                 _nothing_to_drag = false;
5916                                                 i->points.push_back (p);
5917                                         }
5918                                 }
5919                         }
5920                 }
5921
5922                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5923                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5924                 }
5925         }
5926
5927         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5928                 float const f = y_fraction (l->line, current_pointer_y());
5929                 /* we are ignoring x position for this drag, so we can just pass in anything */
5930                 pair<double, float> result;
5931                 uint32_t ignored;
5932                 result = l->line->drag_motion (0, f, true, false, ignored);
5933                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5934         }
5935 }
5936
5937 void
5938 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5939 {
5940         if (_nothing_to_drag || !motion_occurred) {
5941                 return;
5942         }
5943
5944         motion (event, false);
5945         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5946                 i->line->end_drag (false, 0);
5947         }
5948
5949         _editor->commit_reversible_command ();
5950 }
5951
5952 void
5953 AutomationRangeDrag::aborted (bool)
5954 {
5955         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5956                 i->line->reset ();
5957         }
5958 }
5959
5960 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
5961         : view (v)
5962         , initial_time_axis_view (itav)
5963 {
5964         /* note that time_axis_view may be null if the regionview was created
5965          * as part of a copy operation.
5966          */
5967         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
5968         layer = v->region()->layer ();
5969         initial_y = v->get_canvas_group()->position().y;
5970         initial_playlist = v->region()->playlist ();
5971         initial_position = v->region()->position ();
5972         initial_end = v->region()->position () + v->region()->length ();
5973 }
5974
5975 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
5976         : Drag (e, i->canvas_item ())
5977         , _region_view (r)
5978         , _patch_change (i)
5979         , _cumulative_dx (0)
5980 {
5981         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
5982                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
5983                                                    grab_frame()));
5984 }
5985
5986 void
5987 PatchChangeDrag::motion (GdkEvent* ev, bool)
5988 {
5989         framepos_t f = adjusted_current_frame (ev);
5990         boost::shared_ptr<Region> r = _region_view->region ();
5991         f = max (f, r->position ());
5992         f = min (f, r->last_frame ());
5993
5994         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
5995         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
5996         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
5997         _cumulative_dx = dxu;
5998 }
5999
6000 void
6001 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6002 {
6003         if (!movement_occurred) {
6004                 return;
6005         }
6006
6007         boost::shared_ptr<Region> r (_region_view->region ());
6008         framepos_t f = adjusted_current_frame (ev);
6009         f = max (f, r->position ());
6010         f = min (f, r->last_frame ());
6011
6012         _region_view->move_patch_change (
6013                 *_patch_change,
6014                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6015                 );
6016 }
6017
6018 void
6019 PatchChangeDrag::aborted (bool)
6020 {
6021         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6022 }
6023
6024 void
6025 PatchChangeDrag::setup_pointer_frame_offset ()
6026 {
6027         boost::shared_ptr<Region> region = _region_view->region ();
6028         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6029 }
6030
6031 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6032         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6033         , _region_view (rv)
6034 {
6035
6036 }
6037
6038 void
6039 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6040 {
6041         _region_view->update_drag_selection (
6042                 x1, x2, y1, y2,
6043                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6044 }
6045
6046 void
6047 MidiRubberbandSelectDrag::deselect_things ()
6048 {
6049         /* XXX */
6050 }
6051
6052 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6053         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6054         , _region_view (rv)
6055 {
6056         _vertical_only = true;
6057 }
6058
6059 void
6060 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6061 {
6062         double const y = _region_view->midi_view()->y_position ();
6063
6064         y1 = max (0.0, y1 - y);
6065         y2 = max (0.0, y2 - y);
6066
6067         _region_view->update_vertical_drag_selection (
6068                 y1,
6069                 y2,
6070                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6071                 );
6072 }
6073
6074 void
6075 MidiVerticalSelectDrag::deselect_things ()
6076 {
6077         /* XXX */
6078 }
6079
6080 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6081         : RubberbandSelectDrag (e, i)
6082 {
6083
6084 }
6085
6086 void
6087 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6088 {
6089         if (drag_in_progress) {
6090                 /* We just want to select things at the end of the drag, not during it */
6091                 return;
6092         }
6093
6094         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6095
6096         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6097
6098         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6099
6100         _editor->commit_reversible_selection_op ();
6101 }
6102
6103 void
6104 EditorRubberbandSelectDrag::deselect_things ()
6105 {
6106         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6107
6108         _editor->selection->clear_tracks();
6109         _editor->selection->clear_regions();
6110         _editor->selection->clear_points ();
6111         _editor->selection->clear_lines ();
6112         _editor->selection->clear_midi_notes ();
6113
6114         _editor->commit_reversible_selection_op();
6115 }
6116
6117 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6118         : Drag (e, i)
6119         , _region_view (rv)
6120         , _drag_rect (0)
6121 {
6122         _note[0] = _note[1] = 0;
6123 }
6124
6125 NoteCreateDrag::~NoteCreateDrag ()
6126 {
6127         delete _drag_rect;
6128 }
6129
6130 framecnt_t
6131 NoteCreateDrag::grid_frames (framepos_t t) const
6132 {
6133         bool success;
6134         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6135         if (!success) {
6136                 grid_beats = Evoral::Beats(1);
6137         }
6138
6139         return _region_view->region_beats_to_region_frames (grid_beats);
6140 }
6141
6142 void
6143 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6144 {
6145         Drag::start_grab (event, cursor);
6146
6147         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6148
6149         framepos_t pf = _drags->current_pointer_frame ();
6150         framecnt_t const g = grid_frames (pf);
6151
6152         /* Hack so that we always snap to the note that we are over, instead of snapping
6153            to the next one if we're more than halfway through the one we're over.
6154         */
6155         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6156                 pf -= g / 2;
6157         }
6158
6159         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6160         _note[1] = _note[0];
6161
6162         MidiStreamView* sv = _region_view->midi_stream_view ();
6163         double const x = _editor->sample_to_pixel (_note[0]);
6164         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6165
6166         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6167         _drag_rect->set_outline_all ();
6168         _drag_rect->set_outline_color (0xffffff99);
6169         _drag_rect->set_fill_color (0xffffff66);
6170 }
6171
6172 void
6173 NoteCreateDrag::motion (GdkEvent* event, bool)
6174 {
6175         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6176         double const x0 = _editor->sample_to_pixel (_note[0]);
6177         double const x1 = _editor->sample_to_pixel (_note[1]);
6178         _drag_rect->set_x0 (std::min(x0, x1));
6179         _drag_rect->set_x1 (std::max(x0, x1));
6180 }
6181
6182 void
6183 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6184 {
6185         if (!had_movement) {
6186                 return;
6187         }
6188
6189         framepos_t const start = min (_note[0], _note[1]);
6190         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6191
6192         framecnt_t const g = grid_frames (start);
6193         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6194
6195         if (_editor->snap_mode() == SnapNormal && length < g) {
6196                 length = g;
6197         }
6198
6199         Evoral::Beats length_beats = max (
6200                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6201
6202         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6203 }
6204
6205 double
6206 NoteCreateDrag::y_to_region (double y) const
6207 {
6208         double x = 0;
6209         _region_view->get_canvas_group()->canvas_to_item (x, y);
6210         return y;
6211 }
6212
6213 void
6214 NoteCreateDrag::aborted (bool)
6215 {
6216
6217 }
6218
6219 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6220         : Drag (e, i)
6221         , arv (rv)
6222         , start (start_yn)
6223 {
6224         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6225 }
6226
6227 void
6228 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6229 {
6230         Drag::start_grab (event, cursor);
6231 }
6232
6233 void
6234 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6235 {
6236         double distance;
6237         double new_length;
6238         framecnt_t len;
6239
6240         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6241
6242         if (start) {
6243                 distance = _drags->current_pointer_x() - grab_x();
6244                 len = ar->fade_in()->back()->when;
6245         } else {
6246                 distance = grab_x() - _drags->current_pointer_x();
6247                 len = ar->fade_out()->back()->when;
6248         }
6249
6250         /* how long should it be ? */
6251
6252         new_length = len + _editor->pixel_to_sample (distance);
6253
6254         /* now check with the region that this is legal */
6255
6256         new_length = ar->verify_xfade_bounds (new_length, start);
6257
6258         if (start) {
6259                 arv->reset_fade_in_shape_width (ar, new_length);
6260         } else {
6261                 arv->reset_fade_out_shape_width (ar, new_length);
6262         }
6263 }
6264
6265 void
6266 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6267 {
6268         double distance;
6269         double new_length;
6270         framecnt_t len;
6271
6272         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6273
6274         if (start) {
6275                 distance = _drags->current_pointer_x() - grab_x();
6276                 len = ar->fade_in()->back()->when;
6277         } else {
6278                 distance = grab_x() - _drags->current_pointer_x();
6279                 len = ar->fade_out()->back()->when;
6280         }
6281
6282         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6283
6284         _editor->begin_reversible_command ("xfade trim");
6285         ar->playlist()->clear_owned_changes ();
6286
6287         if (start) {
6288                 ar->set_fade_in_length (new_length);
6289         } else {
6290                 ar->set_fade_out_length (new_length);
6291         }
6292
6293         /* Adjusting the xfade may affect other regions in the playlist, so we need
6294            to get undo Commands from the whole playlist rather than just the
6295            region.
6296         */
6297
6298         vector<Command*> cmds;
6299         ar->playlist()->rdiff (cmds);
6300         _editor->session()->add_commands (cmds);
6301         _editor->commit_reversible_command ();
6302
6303 }
6304
6305 void
6306 CrossfadeEdgeDrag::aborted (bool)
6307 {
6308         if (start) {
6309                 // arv->redraw_start_xfade ();
6310         } else {
6311                 // arv->redraw_end_xfade ();
6312         }
6313 }
6314
6315 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6316         : Drag (e, item, true)
6317         , line (new EditorCursor (*e))
6318 {
6319         line->set_position (pos);
6320         line->show ();
6321 }
6322
6323 RegionCutDrag::~RegionCutDrag ()
6324 {
6325         delete line;
6326 }
6327
6328 void
6329 RegionCutDrag::motion (GdkEvent*, bool)
6330 {
6331         framepos_t where = _drags->current_pointer_frame();
6332         _editor->snap_to (where);
6333
6334         line->set_position (where);
6335 }
6336
6337 void
6338 RegionCutDrag::finished (GdkEvent*, bool)
6339 {
6340         _editor->get_track_canvas()->canvas()->re_enter();
6341
6342         framepos_t pos = _drags->current_pointer_frame();
6343
6344         line->hide ();
6345
6346         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6347
6348         if (rs.empty()) {
6349                 return;
6350         }
6351
6352         _editor->split_regions_at (pos, rs);
6353 }
6354
6355 void
6356 RegionCutDrag::aborted (bool)
6357 {
6358 }