gtk2_ardour/editor_drag.cc

   1 /*
   2     Copyright (C) 2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <stdint.h>
  25 #include <algorithm>
  26
  27 #include "pbd/memento_command.h"
  28 #include "pbd/basename.h"
  29 #include "pbd/stateful_diff_command.h"
  30
  31 #include "gtkmm2ext/utils.h"
  32
  33 #include "ardour/audioengine.h"
  34 #include "ardour/audioregion.h"
  35 #include "ardour/audio_track.h"
  36 #include "ardour/dB.h"
  37 #include "ardour/midi_region.h"
  38 #include "ardour/midi_track.h"
  39 #include "ardour/operations.h"
  40 #include "ardour/region_factory.h"
  41 #include "ardour/session.h"
  42
  43 #include "canvas/canvas.h"
  44 #include "canvas/scroll_group.h"
  45
  46 #include "editor.h"
  47 #include "i18n.h"
  48 #include "keyboard.h"
  49 #include "audio_region_view.h"
  50 #include "automation_region_view.h"
  51 #include "midi_region_view.h"
  52 #include "ardour_ui.h"
  53 #include "gui_thread.h"
  54 #include "control_point.h"
  55 #include "region_gain_line.h"
  56 #include "editor_drag.h"
  57 #include "audio_time_axis.h"
  58 #include "midi_time_axis.h"
  59 #include "selection.h"
  60 #include "midi_selection.h"
  61 #include "automation_time_axis.h"
  62 #include "debug.h"
  63 #include "editor_cursors.h"
  64 #include "mouse_cursors.h"
  65 #include "note_base.h"
  66 #include "patch_change.h"
  67 #include "ui_config.h"
  68 #include "verbose_cursor.h"
  69
  70 using namespace std;
  71 using namespace ARDOUR;
  72 using namespace PBD;
  73 using namespace Gtk;
  74 using namespace Gtkmm2ext;
  75 using namespace Editing;
  76 using namespace ArdourCanvas;
  77
  78 using Gtkmm2ext::Keyboard;
  79
  80 double ControlPointDrag::_zero_gain_fraction = -1.0;
  81
  82 DragManager::DragManager (Editor* e)
  83         : _editor (e)
  84         , _ending (false)
  85         , _current_pointer_x (0.0)
  86         , _current_pointer_y (0.0)
  87         , _current_pointer_frame (0)
  88         , _old_follow_playhead (false)
  89 {
  90 }
  91
  92 DragManager::~DragManager ()
  93 {
  94         abort ();
  95 }
  96
  97 /** Call abort for each active drag */
  98 void
  99 DragManager::abort ()
 100 {
 101         _ending = true;
 102
 103         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 104                 (*i)->abort ();
 105                 delete *i;
 106         }
 107
 108         if (!_drags.empty ()) {
 109                 _editor->set_follow_playhead (_old_follow_playhead, false);
 110         }
 111
 112         _drags.clear ();
 113         _editor->abort_reversible_command();
 114
 115         _ending = false;
 116 }
 117
 118 void
 119 DragManager::add (Drag* d)
 120 {
 121         d->set_manager (this);
 122         _drags.push_back (d);
 123 }
 124
 125 void
 126 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
 127 {
 128         d->set_manager (this);
 129         _drags.push_back (d);
 130         start_grab (e, c);
 131 }
 132
 133 void
 134 DragManager::start_grab (GdkEvent* e, Gdk::Cursor* c)
 135 {
 136         /* Prevent follow playhead during the drag to be nice to the user */
 137         _old_follow_playhead = _editor->follow_playhead ();
 138         _editor->set_follow_playhead (false);
 139
 140         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 141
 142         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 143                 (*i)->start_grab (e, c);
 144         }
 145 }
 146
 147 /** Call end_grab for each active drag.
 148  *  @return true if any drag reported movement having occurred.
 149  */
 150 bool
 151 DragManager::end_grab (GdkEvent* e)
 152 {
 153         _ending = true;
 154
 155         bool r = false;
 156         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 157                 bool const t = (*i)->end_grab (e);
 158                 if (t) {
 159                         r = true;
 160                 }
 161                 delete *i;
 162         }
 163
 164         _drags.clear ();
 165
 166         _ending = false;
 167
 168         _editor->set_follow_playhead (_old_follow_playhead, false);
 169
 170         return r;
 171 }
 172
 173 void
 174 DragManager::mark_double_click ()
 175 {
 176         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 177                 (*i)->set_double_click (true);
 178         }
 179 }
 180
 181 bool
 182 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 183 {
 184         bool r = false;
 185
 186         /* calling this implies that we expect the event to have canvas
 187          * coordinates
 188          *
 189          * Can we guarantee that this is true?
 190          */
 191
 192         _current_pointer_frame = _editor->canvas_event_sample (e, &_current_pointer_x, &_current_pointer_y);
 193
 194         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 195                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 196                 /* run all handlers; return true if at least one of them
 197                    returns true (indicating that the event has been handled).
 198                 */
 199                 if (t) {
 200                         r = true;
 201                 }
 202
 203         }
 204
 205         return r;
 206 }
 207
 208 bool
 209 DragManager::have_item (ArdourCanvas::Item* i) const
 210 {
 211         list<Drag*>::const_iterator j = _drags.begin ();
 212         while (j != _drags.end() && (*j)->item () != i) {
 213                 ++j;
 214         }
 215
 216         return j != _drags.end ();
 217 }
 218
 219 Drag::Drag (Editor* e, ArdourCanvas::Item* i, bool trackview_only)
 220         : _editor (e)
 221         , _drags (0)
 222         , _item (i)
 223         , _pointer_frame_offset (0)
 224         , _x_constrained (false)
 225         , _y_constrained (false)
 226         , _was_rolling (false)
 227         , _trackview_only (trackview_only)
 228         , _move_threshold_passed (false)
 229         , _starting_point_passed (false)
 230         , _initially_vertical (false)
 231         , _was_double_click (false)
 232         , _grab_x (0.0)
 233         , _grab_y (0.0)
 234         , _last_pointer_x (0.0)
 235         , _last_pointer_y (0.0)
 236         , _raw_grab_frame (0)
 237         , _grab_frame (0)
 238         , _last_pointer_frame (0)
 239         , _snap_delta (0)
 240 {
 241
 242 }
 243
 244 void
 245 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t /*time*/)
 246 {
 247         _item->ungrab ();
 248         _item = new_item;
 249
 250         if (!_cursor_ctx) {
 251                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 252         } else {
 253                 _cursor_ctx->change (cursor);
 254         }
 255
 256         _item->grab ();
 257 }
 258
 259 void
 260 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 261 {
 262
 263         /* we set up x/y dragging constraints on first move */
 264
 265         _raw_grab_frame = _editor->canvas_event_sample (event, &_grab_x, &_grab_y);
 266
 267         setup_pointer_frame_offset ();
 268         _grab_frame = adjusted_frame (_raw_grab_frame, event);
 269         _last_pointer_frame = _grab_frame;
 270         _last_pointer_x = _grab_x;
 271
 272         if (_trackview_only) {
 273                 _grab_y = _grab_y - _editor->get_trackview_group()->canvas_origin().y;
 274         }
 275
 276         _last_pointer_y = _grab_y;
 277
 278         _item->grab ();
 279
 280         if (!_editor->cursors()->is_invalid (cursor)) {
 281                 /* CAIROCANVAS need a variant here that passes *cursor */
 282                 _cursor_ctx = CursorContext::create (*_editor, cursor);
 283         }
 284
 285         if (_editor->session() && _editor->session()->transport_rolling()) {
 286                 _was_rolling = true;
 287         } else {
 288                 _was_rolling = false;
 289         }
 290
 291         switch (_editor->snap_type()) {
 292         case SnapToRegionStart:
 293         case SnapToRegionEnd:
 294         case SnapToRegionSync:
 295         case SnapToRegionBoundary:
 296                 _editor->build_region_boundary_cache ();
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 /** Call to end a drag `successfully'.  Ungrabs item and calls
 304  *  subclass' finished() method.
 305  *
 306  *  @param event GDK event, or 0.
 307  *  @return true if some movement occurred, otherwise false.
 308  */
 309 bool
 310 Drag::end_grab (GdkEvent* event)
 311 {
 312         _editor->stop_canvas_autoscroll ();
 313
 314         _item->ungrab ();
 315
 316         finished (event, _move_threshold_passed);
 317
 318         _editor->verbose_cursor()->hide ();
 319         _cursor_ctx.reset();
 320
 321         return _move_threshold_passed;
 322 }
 323
 324 framepos_t
 325 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 326 {
 327         framepos_t pos = 0;
 328
 329         if (f > _pointer_frame_offset) {
 330                 pos = f - _pointer_frame_offset;
 331         }
 332
 333         if (snap) {
 334                 _editor->snap_to_with_modifier (pos, event);
 335         }
 336
 337         return pos;
 338 }
 339
 340 framepos_t
 341 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 342 {
 343         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 344 }
 345
 346 frameoffset_t
 347 Drag::snap_delta (guint state) const
 348 {
 349         if (ArdourKeyboard::indicates_snap_delta (state)) {
 350                 return _snap_delta;
 351         }
 352
 353         return 0;
 354 }
 355
 356 double
 357 Drag::current_pointer_x() const
 358 {
 359         return _drags->current_pointer_x ();
 360 }
 361
 362 double
 363 Drag::current_pointer_y () const
 364 {
 365         if (!_trackview_only) {
 366                 return _drags->current_pointer_y ();
 367         }
 368
 369         return _drags->current_pointer_y () - _editor->get_trackview_group()->canvas_origin().y;
 370 }
 371
 372 void
 373 Drag::setup_snap_delta (framepos_t pos)
 374 {
 375         framepos_t temp = pos;
 376         _editor->snap_to (temp, ARDOUR::RoundNearest, false, true);
 377         _snap_delta = temp - pos;
 378 }
 379
 380 bool
 381 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 382 {
 383         /* check to see if we have moved in any way that matters since the last motion event */
 384         if (_move_threshold_passed &&
 385             (!x_movement_matters() || _last_pointer_x == current_pointer_x ()) &&
 386             (!y_movement_matters() || _last_pointer_y == current_pointer_y ()) ) {
 387                 return false;
 388         }
 389
 390         pair<framecnt_t, int> const threshold = move_threshold ();
 391
 392         bool const old_move_threshold_passed = _move_threshold_passed;
 393
 394         if (!_move_threshold_passed) {
 395
 396                 bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
 397                 bool const yp = (::fabs ((current_pointer_y () - _grab_y)) >= threshold.second);
 398
 399                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 400         }
 401
 402         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 403
 404                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 405
 406                         if (old_move_threshold_passed != _move_threshold_passed) {
 407
 408                                 /* just changed */
 409
 410                                 if (fabs (current_pointer_y() - _grab_y) > fabs (current_pointer_x() - _grab_x)) {
 411                                         _initially_vertical = true;
 412                                 } else {
 413                                         _initially_vertical = false;
 414                                 }
 415                                 /** check constraints for this drag.
 416                                  *  Note that the current convention is to use "contains" for
 417                                  *  key modifiers during motion and "equals" when initiating a drag.
 418                                  *  In this case we haven't moved yet, so "equals" applies here.
 419                                  */
 420                                 if (Config->get_edit_mode() != Lock) {
 421                                         if (event->motion.state & Gdk::BUTTON2_MASK) {
 422                                                 // if dragging with button2, the motion is x constrained, with constraint modifier it is y constrained
 423                                                 if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 424                                                         _x_constrained = false;
 425                                                         _y_constrained = true;
 426                                                 } else {
 427                                                         _x_constrained = true;
 428                                                         _y_constrained = false;
 429                                                 }
 430                                         } else if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::constraint_modifier ())) {
 431                                                 // if dragging normally, the motion is constrained to the first direction of movement.
 432                                                 if (_initially_vertical) {
 433                                                         _x_constrained = true;
 434                                                         _y_constrained = false;
 435                                                 } else {
 436                                                         _x_constrained = false;
 437                                                         _y_constrained = true;
 438                                                 }
 439                                         }
 440                                 } else {
 441                                         if (event->button.state & Gdk::BUTTON2_MASK) {
 442                                                 _x_constrained = false;
 443                                         } else {
 444                                                 _x_constrained = true;
 445                                         }
 446                                         _y_constrained = false;
 447                                 }
 448                         }
 449
 450                         if (!from_autoscroll) {
 451                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll (), false);
 452                         }
 453
 454                         if (!_editor->autoscroll_active() || from_autoscroll) {
 455
 456
 457                                 bool first_move = (_move_threshold_passed != old_move_threshold_passed) || from_autoscroll;
 458
 459                                 motion (event, first_move && !_starting_point_passed);
 460
 461                                 if (first_move && !_starting_point_passed) {
 462                                         _starting_point_passed = true;
 463                                 }
 464
 465                                 _last_pointer_x = _drags->current_pointer_x ();
 466                                 _last_pointer_y = current_pointer_y ();
 467                                 _last_pointer_frame = adjusted_current_frame (event, false);
 468                         }
 469
 470                         return true;
 471                 }
 472         }
 473
 474         return false;
 475 }
 476
 477 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 478 void
 479 Drag::abort ()
 480 {
 481         if (_item) {
 482                 _item->ungrab ();
 483         }
 484
 485         aborted (_move_threshold_passed);
 486
 487         _editor->stop_canvas_autoscroll ();
 488         _editor->verbose_cursor()->hide ();
 489 }
 490
 491 void
 492 Drag::show_verbose_cursor_time (framepos_t frame)
 493 {
 494         _editor->verbose_cursor()->set_time (frame);
 495         _editor->verbose_cursor()->show ();
 496 }
 497
 498 void
 499 Drag::show_verbose_cursor_duration (framepos_t start, framepos_t end, double /*xoffset*/)
 500 {
 501         _editor->verbose_cursor()->set_duration (start, end);
 502         _editor->verbose_cursor()->show ();
 503 }
 504
 505 void
 506 Drag::show_verbose_cursor_text (string const & text)
 507 {
 508         _editor->verbose_cursor()->set (text);
 509         _editor->verbose_cursor()->show ();
 510 }
 511
 512 boost::shared_ptr<Region>
 513 Drag::add_midi_region (MidiTimeAxisView* view, bool commit)
 514 {
 515         if (_editor->session()) {
 516                 const TempoMap& map (_editor->session()->tempo_map());
 517                 framecnt_t pos = grab_frame();
 518                 /* not that the frame rate used here can be affected by pull up/down which
 519                    might be wrong.
 520                 */
 521                 framecnt_t len = map.frame_at_beat (map.beat_at_frame (pos) + 1.0) - pos;
 522                 return view->add_region (grab_frame(), len, commit);
 523         }
 524
 525         return boost::shared_ptr<Region>();
 526 }
 527
 528 struct EditorOrderTimeAxisViewSorter {
 529         bool operator() (TimeAxisView* a, TimeAxisView* b) {
 530                 RouteTimeAxisView* ra = dynamic_cast<RouteTimeAxisView*> (a);
 531                 RouteTimeAxisView* rb = dynamic_cast<RouteTimeAxisView*> (b);
 532                 assert (ra && rb);
 533                 return ra->route()->order_key () < rb->route()->order_key ();
 534         }
 535 };
 536
 537 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 538         : Drag (e, i)
 539         , _primary (p)
 540         , _ntracks (0)
 541 {
 542         _editor->visible_order_range (&_visible_y_low, &_visible_y_high);
 543
 544         /* Make a list of tracks to refer to during the drag; we include hidden tracks,
 545            as some of the regions we are dragging may be on such tracks.
 546         */
 547
 548         TrackViewList track_views = _editor->track_views;
 549         track_views.sort (EditorOrderTimeAxisViewSorter ());
 550
 551         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 552                 _time_axis_views.push_back (*i);
 553
 554                 TimeAxisView::Children children_list = (*i)->get_child_list ();
 555                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 556                         _time_axis_views.push_back (j->get());
 557                 }
 558         }
 559
 560         /* the list of views can be empty at this point if this is a region list-insert drag
 561          */
 562
 563         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 564                 _views.push_back (DraggingView (*i, this, &(*i)->get_time_axis_view()));
 565         }
 566
 567         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), boost::bind (&RegionDrag::region_going_away, this, _1), gui_context());
 568 }
 569
 570 void
 571 RegionDrag::region_going_away (RegionView* v)
 572 {
 573         list<DraggingView>::iterator i = _views.begin ();
 574         while (i != _views.end() && i->view != v) {
 575                 ++i;
 576         }
 577
 578         if (i != _views.end()) {
 579                 _views.erase (i);
 580         }
 581 }
 582
 583 /** Given a TimeAxisView, return the index of it into the _time_axis_views vector,
 584  *  or -1 if it is not found.
 585  */
 586 int
 587 RegionDrag::find_time_axis_view (TimeAxisView* t) const
 588 {
 589         int i = 0;
 590         int const N = _time_axis_views.size ();
 591         while (i < N && _time_axis_views[i] != t) {
 592                 ++i;
 593         }
 594
 595         if (_time_axis_views[i] != t) {
 596                 return -1;
 597         }
 598
 599         return i;
 600 }
 601
 602 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 603         : RegionDrag (e, i, p, v)
 604         , _brushing (b)
 605         , _ignore_video_lock (false)
 606         , _total_x_delta (0)
 607         , _last_pointer_time_axis_view (0)
 608         , _last_pointer_layer (0)
 609         , _ndropzone (0)
 610         , _pdropzone (0)
 611         , _ddropzone (0)
 612 {
 613         DEBUG_TRACE (DEBUG::Drags, "New RegionMotionDrag\n");
 614 }
 615
 616 void
 617 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 618 {
 619         Drag::start_grab (event, cursor);
 620         setup_snap_delta (_last_frame_position);
 621
 622         show_verbose_cursor_time (_last_frame_position);
 623
 624         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (current_pointer_y ());
 625         if (tv.first) {
 626                 _last_pointer_time_axis_view = find_time_axis_view (tv.first);
 627                 assert(_last_pointer_time_axis_view >= 0);
 628                 _last_pointer_layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
 629         }
 630
 631         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
 632                 _ignore_video_lock = true;
 633         }
 634
 635         if (_brushing) {
 636                 /* cross track dragging seems broken here. disabled for now. */
 637                 _y_constrained = true;
 638         }
 639 }
 640
 641 double
 642 RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
 643 {
 644         /* compute the amount of pointer motion in frames, and where
 645            the region would be if we moved it by that much.
 646         */
 647         *pending_region_position = adjusted_frame (_drags->current_pointer_frame (), event, false);
 648
 649         framepos_t sync_frame;
 650         framecnt_t sync_offset;
 651         int32_t sync_dir;
 652
 653         sync_offset = _primary->region()->sync_offset (sync_dir);
 654
 655         /* we don't handle a sync point that lies before zero.
 656          */
 657         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 658
 659                 framecnt_t const sd = snap_delta (event->button.state);
 660                 sync_frame = *pending_region_position + (sync_dir * sync_offset) + sd;
 661
 662                 _editor->snap_to_with_modifier (sync_frame, event);
 663
 664                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame) - sd;
 665
 666         } else {
 667                 *pending_region_position = _last_frame_position;
 668         }
 669
 670         if (*pending_region_position > max_framepos - _primary->region()->length()) {
 671                 *pending_region_position = _last_frame_position;
 672         }
 673
 674         double dx = 0;
 675
 676         bool const x_move_allowed = !_x_constrained;
 677
 678         if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
 679
 680                 /* x movement since last time (in pixels) */
 681                 dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->samples_per_pixel;
 682
 683                 /* total x movement */
 684                 framecnt_t total_dx = *pending_region_position;
 685                 if (regions_came_from_canvas()) {
 686                         total_dx = total_dx - grab_frame ();
 687                 }
 688
 689                 /* check that no regions have gone off the start of the session */
 690                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 691                         if ((i->view->region()->position() + total_dx) < 0) {
 692                                 dx = 0;
 693                                 *pending_region_position = _last_frame_position;
 694                                 break;
 695                         }
 696                 }
 697
 698         }
 699
 700         return dx;
 701 }
 702
 703 int
 704 RegionDrag::apply_track_delta (const int start, const int delta, const int skip, const bool distance_only) const
 705 {
 706         if (delta == 0) {
 707                 return start;
 708         }
 709
 710         const int tavsize  = _time_axis_views.size();
 711         const int dt = delta > 0 ? +1 : -1;
 712         int current  = start;
 713         int target   = start + delta - skip;
 714
 715         assert (current < 0 || current >= tavsize || !_time_axis_views[current]->hidden());
 716         assert (skip == 0 || (skip < 0 && delta < 0) || (skip > 0 && delta > 0));
 717
 718         while (current >= 0 && current != target) {
 719                 current += dt;
 720                 if (current < 0 && dt < 0) {
 721                         break;
 722                 }
 723                 if (current >= tavsize && dt > 0) {
 724                         break;
 725                 }
 726                 if (current < 0 || current >= tavsize) {
 727                         continue;
 728                 }
 729
 730                 RouteTimeAxisView const * rtav = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[current]);
 731                 if (_time_axis_views[current]->hidden() || !rtav || !rtav->is_track()) {
 732                         target += dt;
 733                 }
 734
 735                 if (distance_only && current == start + delta) {
 736                         break;
 737                 }
 738         }
 739         return target;
 740 }
 741
 742 bool
 743 RegionMotionDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
 744 {
 745         if (_y_constrained) {
 746                 return false;
 747         }
 748
 749         const int tavsize  = _time_axis_views.size();
 750         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 751                 int n = apply_track_delta (i->time_axis_view, delta_track, skip_invisible);
 752                 assert (n < 0 || n >= tavsize || !_time_axis_views[n]->hidden());
 753
 754                 if (i->time_axis_view < 0 || i->time_axis_view >= tavsize) {
 755                         /* already in the drop zone */
 756                         if (delta_track >= 0) {
 757                                 /* downward motion - OK if others are still not in the dropzone */
 758                                 continue;
 759                         }
 760
 761                 }
 762
 763                 if (n < 0) {
 764                         /* off the top */
 765                         return false;
 766                 } else if (n >= tavsize) {
 767                         /* downward motion into drop zone. That's fine. */
 768                         continue;
 769                 }
 770
 771                 RouteTimeAxisView const * to = dynamic_cast<RouteTimeAxisView const *> (_time_axis_views[n]);
 772                 if (to == 0 || to->hidden() || !to->is_track() || to->track()->data_type() != i->view->region()->data_type()) {
 773                         /* not a track, or the wrong type */
 774                         return false;
 775                 }
 776
 777                 double const l = i->layer + delta_layer;
 778
 779                 /* Note that we allow layer to be up to 0.5 below zero, as this is used by `Expanded'
 780                    mode to allow the user to place a region below another on layer 0.
 781                 */
 782                 if (delta_track == 0 && (l < -0.5 || l >= int (to->view()->layers()))) {
 783                         /* Off the top or bottom layer; note that we only refuse if the track hasn't changed.
 784                            If it has, the layers will be munged later anyway, so it's ok.
 785                         */
 786                         return false;
 787                 }
 788         }
 789
 790         /* all regions being dragged are ok with this change */
 791         return true;
 792 }
 793
 794 struct DraggingViewSorter {
 795         bool operator() (const DraggingView& a, const DraggingView& b) {
 796                 return a.time_axis_view < b.time_axis_view;
 797         }
 798 };
 799
 800 void
 801 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 802 {
 803         double delta_layer = 0;
 804         int delta_time_axis_view = 0;
 805         int current_pointer_time_axis_view = -1;
 806
 807         assert (!_views.empty ());
 808
 809         /* Note: time axis views in this method are often expressed as an index into the _time_axis_views vector */
 810
 811         /* Find the TimeAxisView that the pointer is now over */
 812         const double cur_y = current_pointer_y ();
 813         pair<TimeAxisView*, double> const r = _editor->trackview_by_y_position (cur_y);
 814         TimeAxisView* tv = r.first;
 815
 816         if (!tv && cur_y < 0) {
 817                 /* above trackview area, autoscroll hasn't moved us since last time, nothing to do */
 818                 return;
 819         }
 820
 821         /* find drop-zone y-position */
 822         Coord last_track_bottom_edge;
 823         last_track_bottom_edge = 0;
 824         for (std::vector<TimeAxisView*>::reverse_iterator t = _time_axis_views.rbegin(); t != _time_axis_views.rend(); ++t) {
 825                 if (!(*t)->hidden()) {
 826                         last_track_bottom_edge = (*t)->canvas_display()->canvas_origin ().y + (*t)->effective_height();
 827                         break;
 828                 }
 829         }
 830
 831         if (tv && tv->view()) {
 832                 /* the mouse is over a track */
 833                 double layer = r.second;
 834
 835                 if (first_move && tv->view()->layer_display() == Stacked) {
 836                         tv->view()->set_layer_display (Expanded);
 837                 }
 838
 839                 /* Here's the current pointer position in terms of time axis view and layer */
 840                 current_pointer_time_axis_view = find_time_axis_view (tv);
 841                 assert(current_pointer_time_axis_view >= 0);
 842
 843                 double const current_pointer_layer = tv->layer_display() == Overlaid ? 0 : layer;
 844
 845                 /* Work out the change in y */
 846
 847                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
 848                 if (!rtv || !rtv->is_track()) {
 849                         /* ignore busses early on. we can't move any regions on them */
 850                 } else if (_last_pointer_time_axis_view < 0) {
 851                         /* Was in the drop-zone, now over a track.
 852                          * Hence it must be an upward move (from the bottom)
 853                          *
 854                          * track_index is still -1, so delta must be set to
 855                          * move up the correct number of tracks from the bottom.
 856                          *
 857                          * This is necessary because steps may be skipped if
 858                          * the bottom-most track is not a valid target and/or
 859                          * if there are hidden tracks at the bottom.
 860                          * Hence the initial offset (_ddropzone) as well as the
 861                          * last valid pointer position (_pdropzone) need to be
 862                          * taken into account.
 863                          */
 864                         delta_time_axis_view = current_pointer_time_axis_view - _time_axis_views.size () + _ddropzone - _pdropzone;
 865                 } else {
 866                         delta_time_axis_view = current_pointer_time_axis_view - _last_pointer_time_axis_view;
 867                 }
 868
 869                 /* TODO needs adjustment per DraggingView,
 870                  *
 871                  * e.g. select one region on the top-layer of a track
 872                  * and one region which is at the bottom-layer of another track
 873                  * drag both.
 874                  *
 875                  * Indicated drop-zones and layering is wrong.
 876                  * and may infer additional layers on the target-track
 877                  * (depending how many layers the original track had).
 878                  *
 879                  * Or select two regions (different layers) on a same track,
 880                  * move across a non-layer track.. -> layering info is lost.
 881                  * on drop either of the regions may be on top.
 882                  *
 883                  * Proposed solution: screw it :) well,
 884                  *   don't use delta_layer, use an absolute value
 885                  *   1) remember DraggingView's layer  as float 0..1  [current layer / all layers of source]
 886                  *   2) calculate current mouse pos, y-pos inside track divided by height of mouse-over track.
 887                  *   3) iterate over all DraggingView, find the one that is over the track with most layers
 888                  *   4) proportionally scale layer to layers available on target
 889                  */
 890                 delta_layer = current_pointer_layer - _last_pointer_layer;
 891
 892         }
 893         /* for automation lanes, there is a TimeAxisView but no ->view()
 894          * if (!tv) -> dropzone
 895          */
 896         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view >= 0) {
 897                 /* Moving into the drop-zone.. */
 898                 delta_time_axis_view = _time_axis_views.size () - _last_pointer_time_axis_view;
 899                 /* delta_time_axis_view may not be sufficient to move into the DZ
 900                  * the mouse may enter it, but it may not be a valid move due to
 901                  * constraints.
 902                  *
 903                  * -> remember the delta needed to move into the dropzone
 904                  */
 905                 _ddropzone = delta_time_axis_view;
 906                 /* ..but subtract hidden tracks (or routes) at the bottom.
 907                  * we silently move mover them
 908                  */
 909                 _ddropzone -= apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 910                               - _time_axis_views.size();
 911         }
 912         else if (!tv && cur_y >= 0 && _last_pointer_time_axis_view < 0) {
 913                 /* move around inside the zone.
 914                  * This allows to move further down until all regions are in the zone.
 915                  */
 916                 const double ptr_y = cur_y + _editor->get_trackview_group()->canvas_origin().y;
 917                 assert(ptr_y >= last_track_bottom_edge);
 918                 assert(_ddropzone > 0);
 919
 920                 /* calculate mouse position in 'tracks' below last track. */
 921                 const double dzi_h = TimeAxisView::preset_height (HeightNormal);
 922                 uint32_t dzpos = _ddropzone + floor((1 + ptr_y - last_track_bottom_edge) / dzi_h);
 923
 924                 if (dzpos > _pdropzone && _ndropzone < _ntracks) {
 925                         // move further down
 926                         delta_time_axis_view =  dzpos - _pdropzone;
 927                 } else if (dzpos < _pdropzone && _ndropzone > 0) {
 928                         // move up inside the DZ
 929                         delta_time_axis_view =  dzpos - _pdropzone;
 930                 }
 931         }
 932
 933         /* Work out the change in x */
 934         framepos_t pending_region_position;
 935         double const x_delta = compute_x_delta (event, &pending_region_position);
 936         _last_frame_position = pending_region_position;
 937
 938         /* calculate hidden tracks in current y-axis delta */
 939         int delta_skip = 0;
 940         if (_last_pointer_time_axis_view < 0 && _pdropzone > 0) {
 941                 /* The mouse is more than one track below the dropzone.
 942                  * distance calculation is not needed (and would not work, either
 943                  * because the dropzone is "packed").
 944                  *
 945                  * Except when [partially] moving regions out of dropzone in a large step.
 946                  * (the mouse may or may not remain in the DZ)
 947                  * Hidden tracks at the bottom of the TAV need to be skipped.
 948                  *
 949                  * This also handles the case if the mouse entered the DZ
 950                  * in a large step (exessive delta), either due to fast-movement,
 951                  * autoscroll, laggy UI. _ddropzone copensates for that (see "move into dz" above)
 952                  */
 953                 if (delta_time_axis_view < 0 && (int)_ddropzone - delta_time_axis_view >= (int)_pdropzone) {
 954                         const int dt = delta_time_axis_view + (int)_pdropzone - (int)_ddropzone;
 955                         assert(dt <= 0);
 956                         delta_skip = apply_track_delta(_time_axis_views.size(), dt, 0, true)
 957                                 -_time_axis_views.size() - dt;
 958                 }
 959         }
 960         else if (_last_pointer_time_axis_view < 0) {
 961                 /* Moving out of the zone. Check for hidden tracks at the bottom. */
 962                 delta_skip = apply_track_delta(_time_axis_views.size(), delta_time_axis_view, 0, true)
 963                              -_time_axis_views.size() - delta_time_axis_view;
 964         } else {
 965                 /* calculate hidden tracks that are skipped by the pointer movement */
 966                 delta_skip = apply_track_delta(_last_pointer_time_axis_view, delta_time_axis_view, 0, true)
 967                              - _last_pointer_time_axis_view
 968                              - delta_time_axis_view;
 969         }
 970
 971         /* Verify change in y */
 972         if (!y_movement_allowed (delta_time_axis_view, delta_layer, delta_skip)) {
 973                 /* this y movement is not allowed, so do no y movement this time */
 974                 delta_time_axis_view = 0;
 975                 delta_layer = 0;
 976                 delta_skip = 0;
 977         }
 978
 979         if (x_delta == 0 && (tv && tv->view() && delta_time_axis_view == 0) && delta_layer == 0 && !first_move) {
 980                 /* haven't reached next snap point, and we're not switching
 981                    trackviews nor layers. nothing to do.
 982                 */
 983                 return;
 984         }
 985
 986         typedef map<boost::shared_ptr<Playlist>, double> PlaylistDropzoneMap;
 987         PlaylistDropzoneMap playlist_dropzone_map;
 988         _ndropzone = 0; // number of elements currently in the dropzone
 989
 990         if (first_move) {
 991                 /* sort views by time_axis.
 992                  * This retains track order in the dropzone, regardless
 993                  * of actual selection order
 994                  */
 995                 _views.sort (DraggingViewSorter());
 996
 997                 /* count number of distinct tracks of all regions
 998                  * being dragged, used for dropzone.
 999                  */
1000                 int prev_track = -1;
1001                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1002                         if (i->time_axis_view != prev_track) {
1003                                 prev_track = i->time_axis_view;
1004                                 ++_ntracks;
1005                         }
1006                 }
1007 #ifndef NDEBUG
1008                 int spread =
1009                         _views.back().time_axis_view -
1010                         _views.front().time_axis_view;
1011
1012                 spread -= apply_track_delta (_views.front().time_axis_view, spread, 0, true)
1013                           -  _views.back().time_axis_view;
1014
1015                 printf("Dragging region(s) from %d different track(s), max dist: %d\n", _ntracks, spread);
1016 #endif
1017         }
1018
1019         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1020
1021                 RegionView* rv = i->view;
1022                 double y_delta;
1023
1024                 y_delta = 0;
1025
1026                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1027                         continue;
1028                 }
1029
1030                 if (first_move) {
1031                         rv->drag_start ();
1032
1033                         /* reparent the regionview into a group above all
1034                          * others
1035                          */
1036
1037                         ArdourCanvas::Item* rvg = rv->get_canvas_group();
1038                         Duple rv_canvas_offset = rvg->parent()->canvas_origin ();
1039                         Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
1040                         rv->get_canvas_group()->reparent (_editor->_drag_motion_group);
1041                         /* move the item so that it continues to appear at the
1042                            same location now that its parent has changed.
1043                            */
1044                         rvg->move (rv_canvas_offset - dmg_canvas_offset);
1045                 }
1046
1047                 /* If we have moved tracks, we'll fudge the layer delta so that the
1048                    region gets moved back onto layer 0 on its new track; this avoids
1049                    confusion when dragging regions from non-zero layers onto different
1050                    tracks.
1051                 */
1052                 double this_delta_layer = delta_layer;
1053                 if (delta_time_axis_view != 0) {
1054                         this_delta_layer = - i->layer;
1055                 }
1056
1057                 int this_delta_time_axis_view = apply_track_delta(i->time_axis_view, delta_time_axis_view, delta_skip) - i->time_axis_view;
1058
1059                 int track_index = i->time_axis_view + this_delta_time_axis_view;
1060                 assert(track_index >= 0);
1061
1062                 if (track_index < 0 || track_index >= (int) _time_axis_views.size()) {
1063                         /* Track is in the Dropzone */
1064
1065                         i->time_axis_view = track_index;
1066                         assert(i->time_axis_view >= (int) _time_axis_views.size());
1067                         if (cur_y >= 0) {
1068
1069                                 double yposition = 0;
1070                                 PlaylistDropzoneMap::iterator pdz = playlist_dropzone_map.find (i->view->region()->playlist());
1071                                 rv->set_height (TimeAxisView::preset_height (HeightNormal));
1072                                 ++_ndropzone;
1073
1074                                 /* store index of each new playlist as a negative count, starting at -1 */
1075
1076                                 if (pdz == playlist_dropzone_map.end()) {
1077                                         /* compute where this new track (which doesn't exist yet) will live
1078                                            on the y-axis.
1079                                         */
1080                                         yposition = last_track_bottom_edge; /* where to place the top edge of the regionview */
1081
1082                                         /* How high is this region view ? */
1083
1084                                         boost::optional<ArdourCanvas::Rect> obbox = rv->get_canvas_group()->bounding_box ();
1085                                         ArdourCanvas::Rect bbox;
1086
1087                                         if (obbox) {
1088                                                 bbox = obbox.get ();
1089                                         }
1090
1091                                         last_track_bottom_edge += bbox.height();
1092
1093                                         playlist_dropzone_map.insert (make_pair (i->view->region()->playlist(), yposition));
1094
1095                                 } else {
1096                                         yposition = pdz->second;
1097                                 }
1098
1099                                 /* values are zero or negative, hence the use of min() */
1100                                 y_delta = yposition - rv->get_canvas_group()->canvas_origin().y;
1101                         }
1102
1103                 } else {
1104
1105                         /* The TimeAxisView that this region is now over */
1106                         TimeAxisView* current_tv = _time_axis_views[track_index];
1107
1108                         /* Ensure it is moved from stacked -> expanded if appropriate */
1109                         if (current_tv->view()->layer_display() == Stacked) {
1110                                 current_tv->view()->set_layer_display (Expanded);
1111                         }
1112
1113                         /* We're only allowed to go -ve in layer on Expanded views */
1114                         if (current_tv->view()->layer_display() != Expanded && (i->layer + this_delta_layer) < 0) {
1115                                 this_delta_layer = - i->layer;
1116                         }
1117
1118                         /* Set height */
1119                         rv->set_height (current_tv->view()->child_height ());
1120
1121                         /* Update show/hidden status as the region view may have come from a hidden track,
1122                            or have moved to one.
1123                         */
1124                         if (current_tv->hidden ()) {
1125                                 rv->get_canvas_group()->hide ();
1126                         } else {
1127                                 rv->get_canvas_group()->show ();
1128                         }
1129
1130                         /* Update the DraggingView */
1131                         i->time_axis_view = track_index;
1132                         i->layer += this_delta_layer;
1133
1134                         if (_brushing) {
1135                                 _editor->mouse_brush_insert_region (rv, pending_region_position);
1136                         } else {
1137                                 Duple track_origin;
1138
1139                                 /* Get the y coordinate of the top of the track that this region is now over */
1140                                 track_origin = current_tv->canvas_display()->item_to_canvas (track_origin);
1141
1142                                 /* And adjust for the layer that it should be on */
1143                                 StreamView* cv = current_tv->view ();
1144                                 switch (cv->layer_display ()) {
1145                                 case Overlaid:
1146                                         break;
1147                                 case Stacked:
1148                                         track_origin.y += (cv->layers() - i->layer - 1) * cv->child_height ();
1149                                         break;
1150                                 case Expanded:
1151                                         track_origin.y += (cv->layers() - i->layer - 0.5) * 2 * cv->child_height ();
1152                                         break;
1153                                 }
1154
1155                                 /* need to get the parent of the regionview
1156                                  * canvas group and get its position in
1157                                  * equivalent coordinate space as the trackview
1158                                  * we are now dragging over.
1159                                  */
1160
1161                                 y_delta = track_origin.y - rv->get_canvas_group()->canvas_origin().y;
1162
1163                         }
1164                 }
1165
1166                 /* Now move the region view */
1167                 rv->move (x_delta, y_delta);
1168
1169         } /* foreach region */
1170
1171         _total_x_delta += x_delta;
1172
1173         if (x_delta != 0 && !_brushing) {
1174                 show_verbose_cursor_time (_last_frame_position);
1175         }
1176
1177         /* keep track of pointer movement */
1178         if (tv) {
1179                 /* the pointer is currently over a time axis view */
1180
1181                 if (_last_pointer_time_axis_view < 0) {
1182                         /* last motion event was not over a time axis view
1183                          * or last y-movement out of the dropzone was not valid
1184                          */
1185                         int dtz = 0;
1186                         if (delta_time_axis_view < 0) {
1187                                 /* in the drop zone, moving up */
1188
1189                                 /* _pdropzone is the last known pointer y-axis position inside the DZ.
1190                                  * We do not use negative _last_pointer_time_axis_view because
1191                                  * the dropzone is "packed" (the actual track offset is ignored)
1192                                  *
1193                                  * As opposed to the actual number
1194                                  * of elements in the dropzone (_ndropzone)
1195                                  * _pdropzone is not constrained. This is necessary
1196                                  * to allow moving multiple regions with y-distance
1197                                  * into the DZ.
1198                                  *
1199                                  * There can be 0 elements in the dropzone,
1200                                  * even though the drag-pointer is inside the DZ.
1201                                  *
1202                                  * example:
1203                                  * [ Audio-track, Midi-track, Audio-track, DZ ]
1204                                  * move regions from both audio tracks at the same time into the
1205                                  * DZ by grabbing the region in the bottom track.
1206                                  */
1207                                 assert(current_pointer_time_axis_view >= 0);
1208                                 dtz = std::min((int)_pdropzone, (int)_ddropzone - delta_time_axis_view);
1209                                 _pdropzone -= dtz;
1210                         }
1211
1212                         /* only move out of the zone if the movement is OK */
1213                         if (_pdropzone == 0 && delta_time_axis_view != 0) {
1214                                 assert(delta_time_axis_view < 0);
1215                                 _last_pointer_time_axis_view = current_pointer_time_axis_view;
1216                                 /* if all logic and maths are correct, there is no need to assign the 'current' pointer.
1217                                  * the current position can be calculated as follows:
1218                                  */
1219                                 // a well placed oofus attack can still throw this off.
1220                                 // likley auto-scroll related, printf() debugging may tell, commented out for now.
1221                                 //assert (current_pointer_time_axis_view == _time_axis_views.size() - dtz + _ddropzone + delta_time_axis_view);
1222                         }
1223                 } else {
1224                         /* last motion event was also over a time axis view */
1225                         _last_pointer_time_axis_view += delta_time_axis_view;
1226                         assert(_last_pointer_time_axis_view >= 0);
1227                 }
1228
1229         } else {
1230
1231                 /* the pointer is not over a time axis view */
1232                 assert ((delta_time_axis_view > 0) || (((int)_pdropzone) >= (delta_skip - delta_time_axis_view)));
1233                 _pdropzone += delta_time_axis_view - delta_skip;
1234                 _last_pointer_time_axis_view = -1; // <0 : we're in the zone, value does not matter.
1235         }
1236
1237         _last_pointer_layer += delta_layer;
1238 }
1239
1240 void
1241 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
1242 {
1243         if (_copy && first_move) {
1244                 if (_x_constrained && !_brushing) {
1245                         _editor->begin_reversible_command (Operations::fixed_time_region_copy);
1246                 } else if (!_brushing) {
1247                         _editor->begin_reversible_command (Operations::region_copy);
1248                 } else if (_brushing) {
1249                         _editor->begin_reversible_command (Operations::drag_region_brush);
1250                 }
1251                 /* duplicate the regionview(s) and region(s) */
1252
1253                 list<DraggingView> new_regionviews;
1254
1255                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1256
1257                         RegionView* rv = i->view;
1258                         AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1259                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1260
1261                         const boost::shared_ptr<const Region> original = rv->region();
1262                         boost::shared_ptr<Region> region_copy = RegionFactory::create (original, true);
1263                         region_copy->set_position (original->position());
1264                         /* need to set this so that the drop zone code can work. This doesn't
1265                            actually put the region into the playlist, but just sets a weak pointer
1266                            to it.
1267                         */
1268                         region_copy->set_playlist (original->playlist());
1269
1270                         RegionView* nrv;
1271                         if (arv) {
1272                                 boost::shared_ptr<AudioRegion> audioregion_copy
1273                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1274
1275                                 nrv = new AudioRegionView (*arv, audioregion_copy);
1276                         } else if (mrv) {
1277                                 boost::shared_ptr<MidiRegion> midiregion_copy
1278                                         = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1279                                 nrv = new MidiRegionView (*mrv, midiregion_copy);
1280                         } else {
1281                                 continue;
1282                         }
1283
1284                         nrv->get_canvas_group()->show ();
1285                         new_regionviews.push_back (DraggingView (nrv, this, i->initial_time_axis_view));
1286
1287                         /* swap _primary to the copy */
1288
1289                         if (rv == _primary) {
1290                                 _primary = nrv;
1291                         }
1292
1293                         /* ..and deselect the one we copied */
1294
1295                         rv->set_selected (false);
1296                 }
1297
1298                 if (!new_regionviews.empty()) {
1299
1300                         /* reflect the fact that we are dragging the copies */
1301
1302                         _views = new_regionviews;
1303
1304                         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1305                 }
1306
1307         } else if (!_copy && first_move) {
1308                 if (_x_constrained && !_brushing) {
1309                         _editor->begin_reversible_command (_("fixed time region drag"));
1310                 } else if (!_brushing) {
1311                         _editor->begin_reversible_command (Operations::region_drag);
1312                 } else if (_brushing) {
1313                         _editor->begin_reversible_command (Operations::drag_region_brush);
1314                 }
1315         }
1316         RegionMotionDrag::motion (event, first_move);
1317 }
1318
1319 void
1320 RegionMotionDrag::finished (GdkEvent *, bool)
1321 {
1322         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1323                 if (!(*i)->view()) {
1324                         continue;
1325                 }
1326
1327                 if ((*i)->view()->layer_display() == Expanded) {
1328                         (*i)->view()->set_layer_display (Stacked);
1329                 }
1330         }
1331 }
1332
1333 void
1334 RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
1335 {
1336         RegionMotionDrag::finished (ev, movement_occurred);
1337
1338         if (!movement_occurred) {
1339
1340                 /* just a click */
1341
1342                 if (was_double_click() && !_views.empty()) {
1343                         DraggingView dv = _views.front();
1344                         dv.view->show_region_editor ();
1345
1346                 }
1347
1348                 return;
1349         }
1350
1351         assert (!_views.empty ());
1352
1353         /* We might have hidden region views so that they weren't visible during the drag
1354            (when they have been reparented).  Now everything can be shown again, as region
1355            views are back in their track parent groups.
1356         */
1357         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1358                 i->view->get_canvas_group()->show ();
1359         }
1360
1361         bool const changed_position = (_last_frame_position != _primary->region()->position());
1362         bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
1363         framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
1364
1365         if (_copy) {
1366
1367                 finished_copy (
1368                         changed_position,
1369                         changed_tracks,
1370                         drag_delta
1371                         );
1372
1373         } else {
1374
1375                 finished_no_copy (
1376                         changed_position,
1377                         changed_tracks,
1378                         drag_delta
1379                         );
1380
1381         }
1382
1383         _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
1384 }
1385
1386 RouteTimeAxisView*
1387 RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region, TimeAxisView* original)
1388 {
1389         /* Add a new track of the correct type, and return the RouteTimeAxisView that is created to display the
1390            new track.
1391          */
1392
1393         try {
1394                 if (boost::dynamic_pointer_cast<AudioRegion> (region)) {
1395                         list<boost::shared_ptr<AudioTrack> > audio_tracks;
1396                         uint32_t output_chan = region->n_channels();
1397                         if ((Config->get_output_auto_connect() & AutoConnectMaster) && _editor->session()->master_out()) {
1398                                 output_chan =  _editor->session()->master_out()->n_inputs().n_audio();
1399                         }
1400                         audio_tracks = _editor->session()->new_audio_track (region->n_channels(), output_chan, ARDOUR::Normal, 0, 1, region->name());
1401                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (audio_tracks.front());
1402                         if (rtav) {
1403                                 rtav->set_height (original->current_height());
1404                         }
1405                         return rtav;
1406                 } else {
1407                         ChanCount one_midi_port (DataType::MIDI, 1);
1408                         list<boost::shared_ptr<MidiTrack> > midi_tracks;
1409                         midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port, boost::shared_ptr<ARDOUR::PluginInfo>(), ARDOUR::Normal, 0, 1, region->name());
1410                         RouteTimeAxisView* rtav = _editor->axis_view_from_route (midi_tracks.front());
1411                         if (rtav) {
1412                                 rtav->set_height (original->current_height());
1413                         }
1414                         return rtav;
1415                 }
1416         } catch (...) {
1417                 error << _("Could not create new track after region placed in the drop zone") << endmsg;
1418                 return 0;
1419         }
1420 }
1421
1422 void
1423 RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta)
1424 {
1425         RegionSelection new_views;
1426         PlaylistSet modified_playlists;
1427         RouteTimeAxisView* new_time_axis_view = 0;
1428
1429         if (_brushing) {
1430                 /* all changes were made during motion event handlers */
1431
1432                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
1433                         delete i->view;
1434                 }
1435
1436                 _editor->commit_reversible_command ();
1437                 return;
1438         }
1439
1440         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1441         PlaylistMapping playlist_mapping;
1442
1443         /* insert the regions into their new playlists */
1444         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1445
1446                 RouteTimeAxisView* dest_rtv = 0;
1447
1448                 if (i->view->region()->locked() || (i->view->region()->video_locked() && !_ignore_video_lock)) {
1449                         continue;
1450                 }
1451
1452                 framepos_t where;
1453
1454                 if (changed_position && !_x_constrained) {
1455                         where = i->view->region()->position() - drag_delta;
1456                 } else {
1457                         where = i->view->region()->position();
1458                 }
1459
1460                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1461                         /* dragged to drop zone */
1462
1463                         PlaylistMapping::iterator pm;
1464
1465                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1466                                 /* first region from this original playlist: create a new track */
1467                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1468                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1469                                 dest_rtv = new_time_axis_view;
1470                         } else {
1471                                 /* we already created a new track for regions from this playlist, use it */
1472                                 dest_rtv = pm->second;
1473                         }
1474                 } else {
1475                         /* destination time axis view is the one we dragged to */
1476                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1477                 }
1478
1479                 if (dest_rtv != 0) {
1480                         RegionView* new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, modified_playlists);
1481                         if (new_view != 0) {
1482                                 new_views.push_back (new_view);
1483                         }
1484                 }
1485
1486                 /* Delete the copy of the view that was used for dragging. Need to play safe with the iterator
1487                    since deletion will automagically remove it from _views, thus invalidating i as an iterator.
1488                  */
1489
1490                 list<DraggingView>::const_iterator next = i;
1491                 ++next;
1492                 delete i->view;
1493                 i = next;
1494         }
1495
1496         /* If we've created new regions either by copying or moving
1497            to a new track, we want to replace the old selection with the new ones
1498         */
1499
1500         if (new_views.size() > 0) {
1501                 _editor->selection->set (new_views);
1502         }
1503
1504         /* write commands for the accumulated diffs for all our modified playlists */
1505         add_stateful_diff_commands_for_playlists (modified_playlists);
1506
1507         _editor->commit_reversible_command ();
1508 }
1509
1510 void
1511 RegionMoveDrag::finished_no_copy (
1512         bool const changed_position,
1513         bool const changed_tracks,
1514         framecnt_t const drag_delta
1515         )
1516 {
1517         RegionSelection new_views;
1518         PlaylistSet modified_playlists;
1519         PlaylistSet frozen_playlists;
1520         set<RouteTimeAxisView*> views_to_update;
1521         RouteTimeAxisView* new_time_axis_view = 0;
1522
1523         typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
1524         PlaylistMapping playlist_mapping;
1525
1526         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
1527
1528                 RegionView* rv = i->view;
1529                 RouteTimeAxisView* dest_rtv = 0;
1530
1531                 if (rv->region()->locked() || (rv->region()->video_locked() && !_ignore_video_lock)) {
1532                         ++i;
1533                         continue;
1534                 }
1535
1536                 if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
1537                         /* dragged to drop zone */
1538
1539                         PlaylistMapping::iterator pm;
1540
1541                         if ((pm = playlist_mapping.find (i->view->region()->playlist())) == playlist_mapping.end()) {
1542                                 /* first region from this original playlist: create a new track */
1543                                 new_time_axis_view = create_destination_time_axis (i->view->region(), i->initial_time_axis_view);
1544                                 playlist_mapping.insert (make_pair (i->view->region()->playlist(), new_time_axis_view));
1545                                 dest_rtv = new_time_axis_view;
1546                         } else {
1547                                 /* we already created a new track for regions from this playlist, use it */
1548                                 dest_rtv = pm->second;
1549                         }
1550
1551                 } else {
1552                         /* destination time axis view is the one we dragged to */
1553                         dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[i->time_axis_view]);
1554                 }
1555
1556                 assert (dest_rtv);
1557
1558                 double const dest_layer = i->layer;
1559
1560                 views_to_update.insert (dest_rtv);
1561
1562                 framepos_t where;
1563
1564                 if (changed_position && !_x_constrained) {
1565                         where = rv->region()->position() - drag_delta;
1566                 } else {
1567                         where = rv->region()->position();
1568                 }
1569
1570                 if (changed_tracks) {
1571
1572                         /* insert into new playlist */
1573
1574                         RegionView* new_view = insert_region_into_playlist (
1575                                 RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, modified_playlists
1576                                 );
1577
1578                         if (new_view == 0) {
1579                                 ++i;
1580                                 continue;
1581                         }
1582
1583                         new_views.push_back (new_view);
1584
1585                         /* remove from old playlist */
1586
1587                         /* the region that used to be in the old playlist is not
1588                            moved to the new one - we use a copy of it. as a result,
1589                            any existing editor for the region should no longer be
1590                            visible.
1591                         */
1592                         rv->hide_region_editor();
1593
1594
1595                         remove_region_from_playlist (rv->region(), i->initial_playlist, modified_playlists);
1596
1597                 } else {
1598
1599                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1600
1601                         /* this movement may result in a crossfade being modified, or a layering change,
1602                            so we need to get undo data from the playlist as well as the region.
1603                         */
1604
1605                         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (playlist);
1606                         if (r.second) {
1607                                 playlist->clear_changes ();
1608                         }
1609
1610                         rv->region()->clear_changes ();
1611
1612                         /*
1613                            motion on the same track. plonk the previously reparented region
1614                            back to its original canvas group (its streamview).
1615                            No need to do anything for copies as they are fake regions which will be deleted.
1616                         */
1617
1618                         rv->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1619                         rv->get_canvas_group()->set_y_position (i->initial_y);
1620                         rv->drag_end ();
1621
1622                         /* just change the model */
1623                         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1624                                 playlist->set_layer (rv->region(), dest_layer);
1625                         }
1626
1627                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
1628
1629                         r = frozen_playlists.insert (playlist);
1630
1631                         if (r.second) {
1632                                 playlist->freeze ();
1633                         }
1634
1635                         rv->region()->set_position (where);
1636                         _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
1637                 }
1638
1639                 if (changed_tracks) {
1640
1641                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1642                            was selected in all of them, then removing it from a playlist will have removed all
1643                            trace of it from _views (i.e. there were N regions selected, we removed 1,
1644                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1645                            corresponding regionview, and _views is now empty).
1646
1647                            This could have invalidated any and all iterators into _views.
1648
1649                            The heuristic we use here is: if the region selection is empty, break out of the loop
1650                            here. if the region selection is not empty, then restart the loop because we know that
1651                            we must have removed at least the region(view) we've just been working on as well as any
1652                            that we processed on previous iterations.
1653
1654                            EXCEPT .... if we are doing a copy drag, then _views hasn't been modified and
1655                            we can just iterate.
1656                         */
1657
1658
1659                         if (_views.empty()) {
1660                                 break;
1661                         } else {
1662                                 i = _views.begin();
1663                         }
1664
1665                 } else {
1666                         ++i;
1667                 }
1668         }
1669
1670         /* If we've created new regions either by copying or moving
1671            to a new track, we want to replace the old selection with the new ones
1672         */
1673
1674         if (new_views.size() > 0) {
1675                 _editor->selection->set (new_views);
1676         }
1677
1678         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1679                 (*p)->thaw();
1680         }
1681
1682         /* write commands for the accumulated diffs for all our modified playlists */
1683         add_stateful_diff_commands_for_playlists (modified_playlists);
1684         /* applies to _brushing */
1685         _editor->commit_reversible_command ();
1686
1687         /* We have futzed with the layering of canvas items on our streamviews.
1688            If any region changed layer, this will have resulted in the stream
1689            views being asked to set up their region views, and all will be well.
1690            If not, we might now have badly-ordered region views.  Ask the StreamViews
1691            involved to sort themselves out, just in case.
1692         */
1693
1694         for (set<RouteTimeAxisView*>::iterator i = views_to_update.begin(); i != views_to_update.end(); ++i) {
1695                 (*i)->view()->playlist_layered ((*i)->track ());
1696         }
1697 }
1698
1699 /** Remove a region from a playlist, clearing the diff history of the playlist first if necessary.
1700  *  @param region Region to remove.
1701  *  @param playlist playlist To remove from.
1702  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1703  *  that clear_changes () is only called once per playlist.
1704  */
1705 void
1706 RegionMoveDrag::remove_region_from_playlist (
1707         boost::shared_ptr<Region> region,
1708         boost::shared_ptr<Playlist> playlist,
1709         PlaylistSet& modified_playlists
1710         )
1711 {
1712         pair<set<boost::shared_ptr<Playlist> >::iterator, bool> r = modified_playlists.insert (playlist);
1713
1714         if (r.second) {
1715                 playlist->clear_changes ();
1716         }
1717
1718         playlist->remove_region (region); // should be no need to ripple; we better already have rippled the playlist in RegionRippleDrag
1719 }
1720
1721
1722 /** Insert a region into a playlist, handling the recovery of the resulting new RegionView, and
1723  *  clearing the playlist's diff history first if necessary.
1724  *  @param region Region to insert.
1725  *  @param dest_rtv Destination RouteTimeAxisView.
1726  *  @param dest_layer Destination layer.
1727  *  @param where Destination position.
1728  *  @param modified_playlists The playlist will be added to this if it is not there already; used to ensure
1729  *  that clear_changes () is only called once per playlist.
1730  *  @return New RegionView, or 0 if no insert was performed.
1731  */
1732 RegionView *
1733 RegionMoveDrag::insert_region_into_playlist (
1734         boost::shared_ptr<Region> region,
1735         RouteTimeAxisView* dest_rtv,
1736         layer_t dest_layer,
1737         framecnt_t where,
1738         PlaylistSet& modified_playlists
1739         )
1740 {
1741         boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
1742         if (!dest_playlist) {
1743                 return 0;
1744         }
1745
1746         /* arrange to collect the new region view that will be created as a result of our playlist insertion */
1747         _new_region_view = 0;
1748         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &RegionMoveDrag::collect_new_region_view));
1749
1750         /* clear history for the playlist we are about to insert to, provided we haven't already done so */
1751         pair<PlaylistSet::iterator, bool> r = modified_playlists.insert (dest_playlist);
1752         if (r.second) {
1753                 dest_playlist->clear_changes ();
1754         }
1755
1756         dest_playlist->add_region (region, where);
1757
1758         if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
1759                 dest_playlist->set_layer (region, dest_layer);
1760         }
1761
1762         c.disconnect ();
1763
1764         assert (_new_region_view);
1765
1766         return _new_region_view;
1767 }
1768
1769 void
1770 RegionMoveDrag::collect_new_region_view (RegionView* rv)
1771 {
1772         _new_region_view = rv;
1773 }
1774
1775 void
1776 RegionMoveDrag::add_stateful_diff_commands_for_playlists (PlaylistSet const & playlists)
1777 {
1778         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1779                 StatefulDiffCommand* c = new StatefulDiffCommand (*i);
1780                 if (!c->empty()) {
1781                         _editor->session()->add_command (c);
1782                 } else {
1783                         delete c;
1784                 }
1785         }
1786 }
1787
1788
1789 void
1790 RegionMoveDrag::aborted (bool movement_occurred)
1791 {
1792         if (_copy) {
1793
1794                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end();) {
1795                         list<DraggingView>::const_iterator next = i;
1796                         ++next;
1797                         delete i->view;
1798                         i = next;
1799                 }
1800
1801                 _views.clear ();
1802
1803         } else {
1804                 RegionMotionDrag::aborted (movement_occurred);
1805         }
1806 }
1807
1808 void
1809 RegionMotionDrag::aborted (bool)
1810 {
1811         for (vector<TimeAxisView*>::iterator i = _time_axis_views.begin(); i != _time_axis_views.end(); ++i) {
1812
1813                 StreamView* sview = (*i)->view();
1814
1815                 if (sview) {
1816                         if (sview->layer_display() == Expanded) {
1817                                 sview->set_layer_display (Stacked);
1818                         }
1819                 }
1820         }
1821
1822         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1823                 RegionView* rv = i->view;
1824                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1825                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1826                 assert (rtv);
1827                 rv->get_canvas_group()->reparent (rtv->view()->canvas_item());
1828                 rv->get_canvas_group()->set_y_position (0);
1829                 rv->drag_end ();
1830                 rv->move (-_total_x_delta, 0);
1831                 rv->set_height (rtv->view()->child_height ());
1832         }
1833 }
1834
1835 /** @param b true to brush, otherwise false.
1836  *  @param c true to make copies of the regions being moved, otherwise false.
1837  */
1838 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1839         : RegionMotionDrag (e, i, p, v, b)
1840         , _copy (c)
1841         , _new_region_view (0)
1842 {
1843         DEBUG_TRACE (DEBUG::Drags, "New RegionMoveDrag\n");
1844
1845         double speed = 1;
1846         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&_primary->get_time_axis_view ());
1847         if (rtv && rtv->is_track()) {
1848                 speed = rtv->track()->speed ();
1849         }
1850
1851         _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
1852 }
1853
1854 void
1855 RegionMoveDrag::setup_pointer_frame_offset ()
1856 {
1857         _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
1858 }
1859
1860 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
1861         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1862 {
1863         DEBUG_TRACE (DEBUG::Drags, "New RegionInsertDrag\n");
1864
1865         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1866                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1867
1868         _primary = v->view()->create_region_view (r, false, false);
1869
1870         _primary->get_canvas_group()->show ();
1871         _primary->set_position (pos, 0);
1872         _views.push_back (DraggingView (_primary, this, v));
1873
1874         _last_frame_position = pos;
1875
1876         _item = _primary->get_canvas_group ();
1877 }
1878
1879 void
1880 RegionInsertDrag::finished (GdkEvent *, bool)
1881 {
1882         int pos = _views.front().time_axis_view;
1883         assert(pos >= 0 && pos < (int)_time_axis_views.size());
1884
1885         RouteTimeAxisView* dest_rtv = dynamic_cast<RouteTimeAxisView*> (_time_axis_views[pos]);
1886
1887         _primary->get_canvas_group()->reparent (dest_rtv->view()->canvas_item());
1888         _primary->get_canvas_group()->set_y_position (0);
1889
1890         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1891
1892         _editor->begin_reversible_command (Operations::insert_region);
1893         playlist->clear_changes ();
1894         playlist->add_region (_primary->region (), _last_frame_position);
1895
1896         // Mixbus doesn't seem to ripple when inserting regions from the list: should we? yes, probably
1897         if (Config->get_edit_mode() == Ripple) {
1898                 playlist->ripple (_last_frame_position, _primary->region()->length(), _primary->region());
1899         }
1900
1901         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1902         _editor->commit_reversible_command ();
1903
1904         delete _primary;
1905         _primary = 0;
1906         _views.clear ();
1907 }
1908
1909 void
1910 RegionInsertDrag::aborted (bool)
1911 {
1912         delete _primary;
1913         _primary = 0;
1914         _views.clear ();
1915 }
1916
1917 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1918         : RegionMoveDrag (e, i, p, v, false, false)
1919 {
1920         DEBUG_TRACE (DEBUG::Drags, "New RegionSpliceDrag\n");
1921 }
1922
1923 struct RegionSelectionByPosition {
1924         bool operator() (RegionView*a, RegionView* b) {
1925                 return a->region()->position () < b->region()->position();
1926         }
1927 };
1928
1929 void
1930 RegionSpliceDrag::motion (GdkEvent* event, bool)
1931 {
1932         /* Which trackview is this ? */
1933
1934         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
1935         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1936
1937         /* The region motion is only processed if the pointer is over
1938            an audio track.
1939         */
1940
1941         if (!tv || !tv->is_track()) {
1942                 /* To make sure we hide the verbose canvas cursor when the mouse is
1943                    not held over an audio track.
1944                 */
1945                 _editor->verbose_cursor()->hide ();
1946                 return;
1947         } else {
1948                 _editor->verbose_cursor()->show ();
1949         }
1950
1951         int dir;
1952
1953         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1954                 dir = 1;
1955         } else {
1956                 dir = -1;
1957         }
1958
1959         RegionSelection copy;
1960         _editor->selection->regions.by_position(copy);
1961
1962         framepos_t const pf = adjusted_current_frame (event);
1963
1964         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1965
1966                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1967
1968                 if (!atv) {
1969                         continue;
1970                 }
1971
1972                 boost::shared_ptr<Playlist> playlist;
1973
1974                 if ((playlist = atv->playlist()) == 0) {
1975                         continue;
1976                 }
1977
1978                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1979                         continue;
1980                 }
1981
1982                 if (dir > 0) {
1983                         if (pf < (*i)->region()->last_frame() + 1) {
1984                                 continue;
1985                         }
1986                 } else {
1987                         if (pf > (*i)->region()->first_frame()) {
1988                                 continue;
1989                         }
1990                 }
1991
1992
1993                 playlist->shuffle ((*i)->region(), dir);
1994         }
1995 }
1996
1997 void
1998 RegionSpliceDrag::finished (GdkEvent* event, bool movement_occurred)
1999 {
2000         RegionMoveDrag::finished (event, movement_occurred);
2001 }
2002
2003 void
2004 RegionSpliceDrag::aborted (bool)
2005 {
2006         /* XXX: TODO */
2007 }
2008
2009 /***
2010  * ripple mode...
2011  */
2012
2013 void
2014 RegionRippleDrag::add_all_after_to_views(TimeAxisView *tav, framepos_t where, const RegionSelection &exclude, bool drag_in_progress)
2015 {
2016
2017         boost::shared_ptr<RegionList> rl = tav->playlist()->regions_with_start_within (Evoral::Range<framepos_t>(where, max_framepos));
2018
2019         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(tav);
2020         RegionSelection to_ripple;
2021         for (RegionList::iterator i = rl->begin(); i != rl->end(); ++i) {
2022                 if ((*i)->position() >= where) {
2023                         to_ripple.push_back (rtv->view()->find_view(*i));
2024                 }
2025         }
2026
2027         for (RegionSelection::iterator i = to_ripple.begin(); i != to_ripple.end(); ++i) {
2028                 if (!exclude.contains (*i)) {
2029                         // the selection has already been added to _views
2030
2031                         if (drag_in_progress) {
2032                                 // do the same things that RegionMotionDrag::motion does when
2033                                 // first_move is true, for the region views that we're adding
2034                                 // to _views this time
2035
2036                                 (*i)->drag_start();
2037                                 ArdourCanvas::Item* rvg = (*i)->get_canvas_group();
2038                                 Duple rv_canvas_offset = rvg->item_to_canvas (Duple (0,0));
2039                                 Duple dmg_canvas_offset = _editor->_drag_motion_group->canvas_origin ();
2040                                 rvg->reparent (_editor->_drag_motion_group);
2041
2042                                 // we only need to move in the y direction
2043                                 Duple fudge = rv_canvas_offset - dmg_canvas_offset;
2044                                 fudge.x = 0;
2045                                 rvg->move (fudge);
2046
2047                         }
2048                         _views.push_back (DraggingView (*i, this, tav));
2049                 }
2050         }
2051 }
2052
2053 void
2054 RegionRippleDrag::remove_unselected_from_views(framecnt_t amount, bool move_regions)
2055 {
2056
2057         for (std::list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ) {
2058                 // we added all the regions after the selection
2059
2060                 std::list<DraggingView>::iterator to_erase = i++;
2061                 if (!_editor->selection->regions.contains (to_erase->view)) {
2062                         // restore the non-selected regions to their original playlist & positions,
2063                         // and then ripple them back by the length of the regions that were dragged away
2064                         // do the same things as RegionMotionDrag::aborted
2065
2066                         RegionView *rv = to_erase->view;
2067                         TimeAxisView* tv = &(rv->get_time_axis_view ());
2068                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
2069                         assert (rtv);
2070
2071                         // plonk them back onto their own track
2072                         rv->get_canvas_group()->reparent(rtv->view()->canvas_item());
2073                         rv->get_canvas_group()->set_y_position (0);
2074                         rv->drag_end ();
2075
2076                         if (move_regions) {
2077                                 // move the underlying region to match the view
2078                                 rv->region()->set_position (rv->region()->position() + amount);
2079                         } else {
2080                                 // restore the view to match the underlying region's original position
2081                                 rv->move(-amount, 0);   // second parameter is y delta - seems 0 is OK
2082                         }
2083
2084                         rv->set_height (rtv->view()->child_height ());
2085                         _views.erase (to_erase);
2086                 }
2087         }
2088 }
2089
2090 bool
2091 RegionRippleDrag::y_movement_allowed (int delta_track, double delta_layer, int skip_invisible) const
2092 {
2093         if (RegionMotionDrag::y_movement_allowed (delta_track, delta_layer, skip_invisible)) {
2094                 if (delta_track) {
2095                         return allow_moves_across_tracks;
2096                 } else {
2097                         return true;
2098                 }
2099         }
2100         return false;
2101 }
2102
2103 RegionRippleDrag::RegionRippleDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2104         : RegionMoveDrag (e, i, p, v, false, false)
2105 {
2106         DEBUG_TRACE (DEBUG::Drags, "New RegionRippleDrag\n");
2107         // compute length of selection
2108         RegionSelection selected_regions = _editor->selection->regions;
2109         selection_length = selected_regions.end_frame() - selected_regions.start();
2110
2111         // we'll only allow dragging to another track in ripple mode if all the regions
2112         // being dragged start off on the same track
2113         allow_moves_across_tracks = (selected_regions.playlists().size() == 1);
2114         prev_tav = NULL;
2115         prev_amount = 0;
2116         exclude = new RegionList;
2117         for (RegionSelection::iterator i =selected_regions.begin(); i != selected_regions.end(); ++i) {
2118                 exclude->push_back((*i)->region());
2119         }
2120
2121         // also add regions before start of selection to exclude, to be consistent with how Mixbus does ripple
2122         RegionSelection copy;
2123         selected_regions.by_position(copy); // get selected regions sorted by position into copy
2124
2125         std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = copy.playlists();
2126         std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2127
2128         for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2129                 // find ripple start point on each applicable playlist
2130                 RegionView *first_selected_on_this_track = NULL;
2131                 for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
2132                         if ((*i)->region()->playlist() == (*pi)) {
2133                                 // region is on this playlist - it's the first, because they're sorted
2134                                 first_selected_on_this_track = *i;
2135                                 break;
2136                         }
2137                 }
2138                 assert (first_selected_on_this_track); // we should always find the region in one of the playlists...
2139                 add_all_after_to_views (
2140                                 &first_selected_on_this_track->get_time_axis_view(),
2141                                 first_selected_on_this_track->region()->position(),
2142                                 selected_regions, false);
2143         }
2144
2145         if (allow_moves_across_tracks) {
2146                 orig_tav = &(*selected_regions.begin())->get_time_axis_view();
2147         } else {
2148                 orig_tav = NULL;
2149         }
2150
2151 }
2152
2153 void
2154 RegionRippleDrag::motion (GdkEvent* event, bool first_move)
2155 {
2156         /* Which trackview is this ? */
2157
2158         pair<TimeAxisView*, double> const tvp = _editor->trackview_by_y_position (current_pointer_y ());
2159         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
2160
2161         /* The region motion is only processed if the pointer is over
2162            an audio track.
2163          */
2164
2165         if (!tv || !tv->is_track()) {
2166                 /* To make sure we hide the verbose canvas cursor when the mouse is
2167                    not held over an audiotrack.
2168                  */
2169                 _editor->verbose_cursor()->hide ();
2170                 return;
2171         }
2172
2173         framepos_t where = adjusted_current_frame (event);
2174         assert (where >= 0);
2175         framepos_t after;
2176         double delta = compute_x_delta (event, &after);
2177
2178         framecnt_t amount = _editor->pixel_to_sample (delta);
2179
2180         if (allow_moves_across_tracks) {
2181                 // all the originally selected regions were on the same track
2182
2183                 framecnt_t adjust = 0;
2184                 if (prev_tav && tv != prev_tav) {
2185                         // dragged onto a different track
2186                         // remove the unselected regions from _views, restore them to their original positions
2187                         // and add the regions after the drop point on the new playlist to _views instead.
2188                         // undo the effect of rippling the previous playlist, and include the effect of removing
2189                         // the dragged region(s) from this track
2190
2191                         remove_unselected_from_views (prev_amount, false);
2192                         // ripple previous playlist according to the regions that have been removed onto the new playlist
2193                         prev_tav->playlist()->ripple(prev_position, -selection_length, exclude);
2194                         prev_amount = 0;
2195
2196                         // move just the selected regions
2197                         RegionMoveDrag::motion(event, first_move);
2198
2199                         // ensure that the ripple operation on the new playlist inserts selection_length time
2200                         adjust = selection_length;
2201                         // ripple the new current playlist
2202                         tv->playlist()->ripple (where, amount+adjust, exclude);
2203
2204                         // add regions after point where drag entered this track to subsequent ripples
2205                         add_all_after_to_views (tv, where, _editor->selection->regions, true);
2206
2207                 } else {
2208                         // motion on same track
2209                         RegionMoveDrag::motion(event, first_move);
2210                 }
2211                 prev_tav = tv;
2212
2213                 // remember what we've done to this playlist so we can undo it if the selection is dragged to another track
2214                 prev_position = where;
2215         } else {
2216                 // selection encompasses multiple tracks - just drag
2217                 // cross-track drags are forbidden
2218                 RegionMoveDrag::motion(event, first_move);
2219         }
2220
2221         if (!_x_constrained) {
2222                 prev_amount += amount;
2223         }
2224
2225         _last_frame_position = after;
2226 }
2227
2228 void
2229 RegionRippleDrag::finished (GdkEvent* event, bool movement_occurred)
2230 {
2231         if (!movement_occurred) {
2232
2233                 /* just a click */
2234
2235                 if (was_double_click() && !_views.empty()) {
2236                         DraggingView dv = _views.front();
2237                         dv.view->show_region_editor ();
2238
2239                 }
2240
2241                 return;
2242         }
2243
2244         _editor->begin_reversible_command(_("Ripple drag"));
2245
2246         // remove the regions being rippled from the dragging view, updating them to
2247         // their new positions
2248         remove_unselected_from_views (prev_amount, true);
2249
2250         if (allow_moves_across_tracks) {
2251                 if (orig_tav) {
2252                         // if regions were dragged across tracks, we've rippled any later
2253                         // regions on the track the regions were dragged off, so we need
2254                         // to add the original track to the undo record
2255                         orig_tav->playlist()->clear_changes();
2256                         vector<Command*> cmds;
2257                         orig_tav->playlist()->rdiff (cmds);
2258                         _editor->session()->add_commands (cmds);
2259                 }
2260                 if (prev_tav && prev_tav != orig_tav) {
2261                         prev_tav->playlist()->clear_changes();
2262                         vector<Command*> cmds;
2263                         prev_tav->playlist()->rdiff (cmds);
2264                         _editor->session()->add_commands (cmds);
2265                 }
2266         } else {
2267                 // selection spanned multiple tracks - all will need adding to undo record
2268
2269                 std::set<boost::shared_ptr<ARDOUR::Playlist> > playlists = _editor->selection->regions.playlists();
2270                 std::set<boost::shared_ptr<ARDOUR::Playlist> >::const_iterator pi;
2271
2272                 for (pi = playlists.begin(); pi != playlists.end(); ++pi) {
2273                         (*pi)->clear_changes();
2274                         vector<Command*> cmds;
2275                         (*pi)->rdiff (cmds);
2276                         _editor->session()->add_commands (cmds);
2277                 }
2278         }
2279
2280         // other modified playlists are added to undo by RegionMoveDrag::finished()
2281         RegionMoveDrag::finished (event, movement_occurred);
2282         _editor->commit_reversible_command();
2283 }
2284
2285 void
2286 RegionRippleDrag::aborted (bool movement_occurred)
2287 {
2288         RegionMoveDrag::aborted (movement_occurred);
2289         _views.clear ();
2290 }
2291
2292
2293 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
2294         : Drag (e, i),
2295           _view (dynamic_cast<MidiTimeAxisView*> (v))
2296 {
2297         DEBUG_TRACE (DEBUG::Drags, "New RegionCreateDrag\n");
2298
2299         assert (_view);
2300 }
2301
2302 void
2303 RegionCreateDrag::motion (GdkEvent* event, bool first_move)
2304 {
2305         if (first_move) {
2306                 _editor->begin_reversible_command (_("create region"));
2307                 _region = add_midi_region (_view, false);
2308                 _view->playlist()->freeze ();
2309         } else {
2310                 if (_region) {
2311                         framepos_t const f = adjusted_current_frame (event);
2312                         if (f < grab_frame()) {
2313                                 _region->set_initial_position (f);
2314                         }
2315
2316                         /* Don't use a zero-length region, and subtract 1 frame from the snapped length
2317                            so that if this region is duplicated, its duplicate starts on
2318                            a snap point rather than 1 frame after a snap point.  Otherwise things get
2319                            a bit confusing as if a region starts 1 frame after a snap point, one cannot
2320                            place snapped notes at the start of the region.
2321                         */
2322
2323                         framecnt_t const len = (framecnt_t) fabs ((double)(f - grab_frame () - 1));
2324                         _region->set_length (len < 1 ? 1 : len);
2325                 }
2326         }
2327 }
2328
2329 void
2330 RegionCreateDrag::finished (GdkEvent*, bool movement_occurred)
2331 {
2332         if (!movement_occurred) {
2333                 add_midi_region (_view, true);
2334         } else {
2335                 _view->playlist()->thaw ();
2336                 _editor->commit_reversible_command();
2337         }
2338 }
2339
2340 void
2341 RegionCreateDrag::aborted (bool)
2342 {
2343         if (_region) {
2344                 _view->playlist()->thaw ();
2345         }
2346
2347         /* XXX */
2348 }
2349
2350 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
2351         : Drag (e, i)
2352         , region (0)
2353         , relative (false)
2354         , at_front (true)
2355         , _was_selected (false)
2356         , _snap_delta (0)
2357 {
2358         DEBUG_TRACE (DEBUG::Drags, "New NoteResizeDrag\n");
2359 }
2360
2361 void
2362 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
2363 {
2364         Gdk::Cursor* cursor;
2365         NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2366         assert (cnote);
2367         float x_fraction = cnote->mouse_x_fraction ();
2368
2369         if (x_fraction > 0.0 && x_fraction < 0.25) {
2370                 cursor = _editor->cursors()->left_side_trim;
2371                 at_front = true;
2372         } else  {
2373                 cursor = _editor->cursors()->right_side_trim;
2374                 at_front = false;
2375         }
2376
2377         Drag::start_grab (event, cursor);
2378
2379         region = &cnote->region_view();
2380
2381         double temp;
2382         temp = region->snap_to_pixel (cnote->x0 (), true);
2383         _snap_delta = temp - cnote->x0 ();
2384
2385         _item->grab ();
2386
2387         if (event->motion.state & ArdourKeyboard::note_size_relative_modifier ()) {
2388                 relative = false;
2389         } else {
2390                 relative = true;
2391         }
2392         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2393         if (ms.size() > 1) {
2394                 /* has to be relative, may make no sense otherwise */
2395                 relative = true;
2396         }
2397
2398         if (!(_was_selected = cnote->selected())) {
2399
2400                 /* tertiary-click means extend selection - we'll do that on button release,
2401                    so don't add it here, because otherwise we make it hard to figure
2402                    out the "extend-to" range.
2403                 */
2404
2405                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2406
2407                 if (!extend) {
2408                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2409
2410                         if (add) {
2411                                 region->note_selected (cnote, true);
2412                         } else {
2413                                 _editor->get_selection().clear_points();
2414                                 region->unique_select (cnote);
2415                         }
2416                 }
2417         }
2418 }
2419
2420 void
2421 NoteResizeDrag::motion (GdkEvent* event, bool first_move)
2422 {
2423         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2424         if (first_move) {
2425                 _editor->begin_reversible_command (_("resize notes"));
2426
2427                 for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
2428                         MidiRegionSelection::iterator next;
2429                         next = r;
2430                         ++next;
2431                         MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2432                         if (mrv) {
2433                                 mrv->begin_resizing (at_front);
2434                         }
2435                         r = next;
2436                 }
2437         }
2438
2439         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2440                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2441                 assert (nb);
2442                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2443                 if (mrv) {
2444                         double sd = 0.0;
2445                         bool snap = true;
2446                         bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2447
2448                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2449                                 if (_editor->snap_mode () != SnapOff) {
2450                                         snap = false;
2451                                 }
2452                         } else {
2453                                 if (_editor->snap_mode () == SnapOff) {
2454                                         snap = false;
2455                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2456                                         if (apply_snap_delta) {
2457                                                 snap = true;
2458                                         }
2459                                 }
2460                         }
2461
2462                         if (apply_snap_delta) {
2463                                 sd = _snap_delta;
2464                         }
2465
2466                         mrv->update_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2467                 }
2468         }
2469 }
2470
2471 void
2472 NoteResizeDrag::finished (GdkEvent* event, bool movement_occurred)
2473 {
2474         if (!movement_occurred) {
2475                 /* no motion - select note */
2476                 NoteBase* cnote = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2477                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
2478                     _editor->current_mouse_mode() == Editing::MouseDraw) {
2479
2480                         bool changed = false;
2481
2482                         if (_was_selected) {
2483                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2484                                 if (add) {
2485                                         region->note_deselected (cnote);
2486                                         changed = true;
2487                                 } else {
2488                                         _editor->get_selection().clear_points();
2489                                         region->unique_select (cnote);
2490                                         changed = true;
2491                                 }
2492                         } else {
2493                                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
2494                                 bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
2495
2496                                 if (!extend && !add && region->selection_size() > 1) {
2497                                         _editor->get_selection().clear_points();
2498                                         region->unique_select (cnote);
2499                                         changed = true;
2500                                 } else if (extend) {
2501                                         region->note_selected (cnote, true, true);
2502                                         changed = true;
2503                                 } else {
2504                                         /* it was added during button press */
2505                                         changed = true;
2506                                 }
2507                         }
2508
2509                         if (changed) {
2510                                 _editor->begin_reversible_selection_op(X_("Resize Select Note Release"));
2511                                 _editor->commit_reversible_selection_op();
2512                         }
2513                 }
2514
2515                 return;
2516         }
2517
2518         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2519         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2520                 NoteBase* nb = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
2521                 assert (nb);
2522                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2523                 double sd = 0.0;
2524                 bool snap = true;
2525                 bool apply_snap_delta = ArdourKeyboard::indicates_snap_delta (event->button.state);
2526                 if (mrv) {
2527                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
2528                                 if (_editor->snap_mode () != SnapOff) {
2529                                         snap = false;
2530                                 }
2531                         } else {
2532                                 if (_editor->snap_mode () == SnapOff) {
2533                                         snap = false;
2534                                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
2535                                         if (apply_snap_delta) {
2536                                                 snap = true;
2537                                         }
2538                                 }
2539                         }
2540
2541                         if (apply_snap_delta) {
2542                                 sd = _snap_delta;
2543                         }
2544
2545                         mrv->commit_resizing (nb, at_front, _drags->current_pointer_x() - grab_x(), relative, sd, snap);
2546                 }
2547         }
2548
2549         _editor->commit_reversible_command ();
2550 }
2551
2552 void
2553 NoteResizeDrag::aborted (bool)
2554 {
2555         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
2556         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
2557                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*r);
2558                 if (mrv) {
2559                         mrv->abort_resizing ();
2560                 }
2561         }
2562 }
2563
2564 AVDraggingView::AVDraggingView (RegionView* v)
2565         : view (v)
2566 {
2567         initial_position = v->region()->position ();
2568 }
2569
2570 VideoTimeLineDrag::VideoTimeLineDrag (Editor* e, ArdourCanvas::Item* i)
2571         : Drag (e, i)
2572 {
2573         DEBUG_TRACE (DEBUG::Drags, "New VideoTimeLineDrag\n");
2574
2575         RegionSelection rs;
2576         TrackViewList empty;
2577         empty.clear();
2578         _editor->get_regions_after(rs, (framepos_t) 0, empty);
2579         std::list<RegionView*> views = rs.by_layer();
2580
2581         _stuck = false;
2582         for (list<RegionView*>::iterator i = views.begin(); i != views.end(); ++i) {
2583                 RegionView* rv = (*i);
2584                 if (!rv->region()->video_locked()) {
2585                         continue;
2586                 }
2587                 if (rv->region()->locked()) {
2588                         _stuck = true;
2589                 }
2590                 _views.push_back (AVDraggingView (rv));
2591         }
2592 }
2593
2594 void
2595 VideoTimeLineDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2596 {
2597         Drag::start_grab (event);
2598         if (_editor->session() == 0) {
2599                 return;
2600         }
2601
2602         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
2603                 _stuck = false;
2604                 _views.clear();
2605         }
2606
2607         if (_stuck) {
2608                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2609                 return;
2610         }
2611
2612         _startdrag_video_offset=ARDOUR_UI::instance()->video_timeline->get_offset();
2613         _max_backwards_drag = (
2614                           ARDOUR_UI::instance()->video_timeline->get_duration()
2615                         + ARDOUR_UI::instance()->video_timeline->get_offset()
2616                         - ceil(ARDOUR_UI::instance()->video_timeline->get_apv())
2617                         );
2618
2619         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2620                 if (i->initial_position < _max_backwards_drag || _max_backwards_drag < 0) {
2621                         _max_backwards_drag = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv (i->initial_position);
2622                 }
2623         }
2624         DEBUG_TRACE (DEBUG::Drags, string_compose("VideoTimeLineDrag: max backwards-drag: %1\n", _max_backwards_drag));
2625
2626         char buf[128];
2627         Timecode::Time timecode;
2628         _editor->session()->sample_to_timecode(abs(_startdrag_video_offset), timecode, true /* use_offset */, false /* use_subframes */ );
2629         snprintf (buf, sizeof (buf), "Video Start:\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, (_startdrag_video_offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
2630         show_verbose_cursor_text (buf);
2631 }
2632
2633 void
2634 VideoTimeLineDrag::motion (GdkEvent* event, bool first_move)
2635 {
2636         if (_editor->session() == 0) {
2637                 return;
2638         }
2639         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2640                 return;
2641         }
2642         if (_stuck) {
2643                 show_verbose_cursor_text (_("One or more Audio Regions\nare both Locked and\nLocked to Video.\nThe video cannot me moved."));
2644                 return;
2645         }
2646
2647         framecnt_t dt = adjusted_current_frame (event) - raw_grab_frame() + _pointer_frame_offset;
2648         dt = ARDOUR_UI::instance()->video_timeline->quantify_frames_to_apv(_startdrag_video_offset+dt) - _startdrag_video_offset;
2649
2650         if (_max_backwards_drag >= 0 && dt <= - _max_backwards_drag) {
2651                 dt = - _max_backwards_drag;
2652         }
2653
2654         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset+dt);
2655         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2656
2657         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2658                 RegionView* rv = i->view;
2659                 DEBUG_TRACE (DEBUG::Drags, string_compose("SHIFT REGION at %1 by %2\n", i->initial_position, dt));
2660                 if (first_move) {
2661                         rv->drag_start ();
2662                         rv->region()->clear_changes ();
2663                         rv->region()->suspend_property_changes();
2664                 }
2665                 rv->region()->set_position(i->initial_position + dt);
2666                 rv->region_changed(ARDOUR::Properties::position);
2667         }
2668
2669         const framepos_t offset = ARDOUR_UI::instance()->video_timeline->get_offset();
2670         Timecode::Time timecode;
2671         Timecode::Time timediff;
2672         char buf[128];
2673         _editor->session()->sample_to_timecode(abs(offset), timecode, true /* use_offset */, false /* use_subframes */ );
2674         _editor->session()->sample_to_timecode(abs(dt), timediff, false /* use_offset */, false /* use_subframes */ );
2675         snprintf (buf, sizeof (buf),
2676                         "%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2677                         "\n%s\n%c%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32
2678                         , _("Video Start:"),
2679                                 (offset<0?'-':' '), timecode.hours, timecode.minutes, timecode.seconds, timecode.frames
2680                         , _("Diff:"),
2681                                 (dt<0?'-':' '), timediff.hours, timediff.minutes, timediff.seconds, timediff.frames
2682                                 );
2683         show_verbose_cursor_text (buf);
2684 }
2685
2686 void
2687 VideoTimeLineDrag::finished (GdkEvent * /*event*/, bool movement_occurred)
2688 {
2689         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2690                 return;
2691         }
2692         if (_stuck) {
2693                 return;
2694         }
2695
2696         if (!movement_occurred || ! _editor->session()) {
2697                 return;
2698         }
2699
2700         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2701
2702         _editor->begin_reversible_command (_("Move Video"));
2703
2704         XMLNode &before = ARDOUR_UI::instance()->video_timeline->get_state();
2705         ARDOUR_UI::instance()->video_timeline->save_undo();
2706         XMLNode &after = ARDOUR_UI::instance()->video_timeline->get_state();
2707         _editor->session()->add_command(new MementoCommand<VideoTimeLine>(*(ARDOUR_UI::instance()->video_timeline), &before, &after));
2708
2709         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2710                 i->view->drag_end();
2711                 i->view->region()->resume_property_changes ();
2712
2713                 _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
2714         }
2715
2716         _editor->session()->maybe_update_session_range(
2717                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset(), (ARDOUR::frameoffset_t) 0),
2718                         std::max(ARDOUR_UI::instance()->video_timeline->get_offset() + ARDOUR_UI::instance()->video_timeline->get_duration(), (ARDOUR::frameoffset_t) 0)
2719                         );
2720
2721
2722         _editor->commit_reversible_command ();
2723 }
2724
2725 void
2726 VideoTimeLineDrag::aborted (bool)
2727 {
2728         if (ARDOUR_UI::instance()->video_timeline->is_offset_locked()) {
2729                 return;
2730         }
2731         ARDOUR_UI::instance()->video_timeline->set_offset(_startdrag_video_offset);
2732         ARDOUR_UI::instance()->flush_videotimeline_cache(true);
2733
2734         for (list<AVDraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2735                 i->view->region()->resume_property_changes ();
2736                 i->view->region()->set_position(i->initial_position);
2737         }
2738 }
2739
2740 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool preserve_fade_anchor)
2741         : RegionDrag (e, i, p, v)
2742         , _operation (StartTrim)
2743         , _preserve_fade_anchor (preserve_fade_anchor)
2744         , _jump_position_when_done (false)
2745 {
2746         DEBUG_TRACE (DEBUG::Drags, "New TrimDrag\n");
2747 }
2748
2749 void
2750 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
2751 {
2752         double speed = 1.0;
2753         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2754         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2755
2756         if (tv && tv->is_track()) {
2757                 speed = tv->track()->speed();
2758         }
2759
2760         framepos_t const region_start = (framepos_t) (_primary->region()->position() / speed);
2761         framepos_t const region_end = (framepos_t) (_primary->region()->last_frame() / speed);
2762         framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
2763
2764         framepos_t const pf = adjusted_current_frame (event);
2765         setup_snap_delta (region_start);
2766
2767         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_contents_modifier ())) {
2768                 /* Move the contents of the region around without changing the region bounds */
2769                 _operation = ContentsTrim;
2770                 Drag::start_grab (event, _editor->cursors()->trimmer);
2771         } else {
2772                 /* These will get overridden for a point trim.*/
2773                 if (pf < (region_start + region_length/2)) {
2774                         /* closer to front */
2775                         _operation = StartTrim;
2776                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2777                                 Drag::start_grab (event, _editor->cursors()->anchored_left_side_trim);
2778                         } else {
2779                                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
2780                         }
2781                 } else {
2782                         /* closer to end */
2783                         _operation = EndTrim;
2784                         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_anchored_modifier ())) {
2785                                 Drag::start_grab (event, _editor->cursors()->anchored_right_side_trim);
2786                         } else {
2787                                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
2788                         }
2789                 }
2790         }
2791         /* jump trim disabled for now
2792         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::trim_jump_modifier ())) {
2793                 _jump_position_when_done = true;
2794         }
2795         */
2796
2797         switch (_operation) {
2798         case StartTrim:
2799                 show_verbose_cursor_time (region_start);
2800                 break;
2801         case EndTrim:
2802                 show_verbose_cursor_duration (region_start, region_end);
2803                 break;
2804         case ContentsTrim:
2805                 show_verbose_cursor_time (pf);
2806                 break;
2807         }
2808
2809         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2810                 i->view->region()->suspend_property_changes ();
2811         }
2812 }
2813
2814 void
2815 TrimDrag::motion (GdkEvent* event, bool first_move)
2816 {
2817         RegionView* rv = _primary;
2818
2819         double speed = 1.0;
2820         TimeAxisView* tvp = &_primary->get_time_axis_view ();
2821         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
2822         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
2823         frameoffset_t frame_delta = 0;
2824
2825         if (tv && tv->is_track()) {
2826                 speed = tv->track()->speed();
2827         }
2828         framecnt_t adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
2829         framecnt_t dt = adj_frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
2830
2831         if (first_move) {
2832
2833                 string trim_type;
2834
2835                 switch (_operation) {
2836                 case StartTrim:
2837                         trim_type = "Region start trim";
2838                         break;
2839                 case EndTrim:
2840                         trim_type = "Region end trim";
2841                         break;
2842                 case ContentsTrim:
2843                         trim_type = "Region content trim";
2844                         break;
2845                 default:
2846                         assert(0);
2847                         break;
2848                 }
2849
2850                 _editor->begin_reversible_command (trim_type);
2851
2852                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2853                         RegionView* rv = i->view;
2854                         rv->enable_display (false);
2855                         rv->region()->playlist()->clear_owned_changes ();
2856
2857                         if (_operation == StartTrim) {
2858                                 rv->trim_front_starting ();
2859                         }
2860
2861                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
2862
2863                         if (arv) {
2864                                 arv->temporarily_hide_envelope ();
2865                                 arv->drag_start ();
2866                         }
2867
2868                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
2869                         insert_result = _editor->motion_frozen_playlists.insert (pl);
2870
2871                         if (insert_result.second) {
2872                                 pl->freeze();
2873                         }
2874                 }
2875         }
2876
2877         bool non_overlap_trim = false;
2878
2879         if (event && Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::trim_overlap_modifier ())) {
2880                 non_overlap_trim = true;
2881         }
2882
2883         /* contstrain trim to fade length */
2884         if (_preserve_fade_anchor) {
2885                 switch (_operation) {
2886                         case StartTrim:
2887                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2888                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2889                                         if (!arv) continue;
2890                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2891                                         if (ar->locked()) continue;
2892                                         framecnt_t len = ar->fade_in()->back()->when;
2893                                         if (len < dt) dt = min(dt, len);
2894                                 }
2895                                 break;
2896                         case EndTrim:
2897                                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2898                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2899                                         if (!arv) continue;
2900                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2901                                         if (ar->locked()) continue;
2902                                         framecnt_t len = ar->fade_out()->back()->when;
2903                                         if (len < -dt) dt = max(dt, -len);
2904                                 }
2905                                 break;
2906                         case ContentsTrim:
2907                                 break;
2908                 }
2909         }
2910
2911
2912         switch (_operation) {
2913         case StartTrim:
2914                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2915                         bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim);
2916                         if (changed && _preserve_fade_anchor) {
2917                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2918                                 if (arv) {
2919                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2920                                         framecnt_t len = ar->fade_in()->back()->when;
2921                                         framecnt_t diff = ar->first_frame() - i->initial_position;
2922                                         framepos_t new_length = len - diff;
2923                                         i->anchored_fade_length = min (ar->length(), new_length);
2924                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, true  /*START*/ );
2925                                         arv->reset_fade_in_shape_width (ar, i->anchored_fade_length, true);
2926                                 }
2927                         }
2928                 }
2929                 break;
2930
2931         case EndTrim:
2932                 for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2933                         bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim);
2934                         if (changed && _preserve_fade_anchor) {
2935                                 AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2936                                 if (arv) {
2937                                         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2938                                         framecnt_t len = ar->fade_out()->back()->when;
2939                                         framecnt_t diff = 1 + ar->last_frame() - i->initial_end;
2940                                         framepos_t new_length = len + diff;
2941                                         i->anchored_fade_length = min (ar->length(), new_length);
2942                                         //i->anchored_fade_length = ar->verify_xfade_bounds (new_length, false  /*END*/ );
2943                                         arv->reset_fade_out_shape_width (ar, i->anchored_fade_length, true);
2944                                 }
2945                         }
2946                 }
2947                 break;
2948
2949         case ContentsTrim:
2950                 {
2951                         frame_delta = (last_pointer_frame() - adjusted_current_frame(event));
2952
2953                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2954                                 i->view->move_contents (frame_delta);
2955                         }
2956                 }
2957                 break;
2958         }
2959
2960         switch (_operation) {
2961         case StartTrim:
2962                 show_verbose_cursor_time ((framepos_t) (rv->region()->position() / speed));
2963                 break;
2964         case EndTrim:
2965                 show_verbose_cursor_duration ((framepos_t)  rv->region()->position() / speed, (framepos_t) rv->region()->last_frame() / speed);
2966                 break;
2967         case ContentsTrim:
2968                 // show_verbose_cursor_time (frame_delta);
2969                 break;
2970         }
2971 }
2972
2973 void
2974 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
2975 {
2976         if (movement_occurred) {
2977                 motion (event, false);
2978
2979                 if (_operation == StartTrim) {
2980                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
2981                                 {
2982                                         /* This must happen before the region's StatefulDiffCommand is created, as it may
2983                                            `correct' (ahem) the region's _start from being negative to being zero.  It
2984                                            needs to be zero in the undo record.
2985                                         */
2986                                         i->view->trim_front_ending ();
2987                                 }
2988                                 if (_preserve_fade_anchor) {
2989                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
2990                                         if (arv) {
2991                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
2992                                                 arv->reset_fade_in_shape_width (ar, i->anchored_fade_length);
2993                                                 ar->set_fade_in_length(i->anchored_fade_length);
2994                                                 ar->set_fade_in_active(true);
2995                                         }
2996                                 }
2997                                 if (_jump_position_when_done) {
2998                                         i->view->region()->set_position (i->initial_position);
2999                                 }
3000                         }
3001                 } else if (_operation == EndTrim) {
3002                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3003                                 if (_preserve_fade_anchor) {
3004                                         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
3005                                         if (arv) {
3006                                                 boost::shared_ptr<AudioRegion> ar (arv->audio_region());
3007                                                 arv->reset_fade_out_shape_width (ar, i->anchored_fade_length);
3008                                                 ar->set_fade_out_length(i->anchored_fade_length);
3009                                                 ar->set_fade_out_active(true);
3010                                         }
3011                                 }
3012                                 if (_jump_position_when_done) {
3013                                         i->view->region()->set_position (i->initial_end - i->view->region()->length());
3014                                 }
3015                         }
3016                 }
3017
3018                 if (!_views.empty()) {
3019                         if (_operation == StartTrim) {
3020                                 _editor->maybe_locate_with_edit_preroll(
3021                                         _views.begin()->view->region()->position());
3022                         }
3023                         if (_operation == EndTrim) {
3024                                 _editor->maybe_locate_with_edit_preroll(
3025                                         _views.begin()->view->region()->position() +
3026                                         _views.begin()->view->region()->length());
3027                         }
3028                 }
3029
3030                 if (!_editor->selection->selected (_primary)) {
3031                         _primary->thaw_after_trim ();
3032                 } else {
3033
3034                         set<boost::shared_ptr<Playlist> > diffed_playlists;
3035
3036                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3037                                 i->view->thaw_after_trim ();
3038                                 i->view->enable_display (true);
3039
3040                                 /* Trimming one region may affect others on the playlist, so we need
3041                                    to get undo Commands from the whole playlist rather than just the
3042                                    region.  Use diffed_playlists to make sure we don't diff a given
3043                                    playlist more than once.
3044                                 */
3045                                 boost::shared_ptr<Playlist> p = i->view->region()->playlist ();
3046                                 if (diffed_playlists.find (p) == diffed_playlists.end()) {
3047                                         vector<Command*> cmds;
3048                                         p->rdiff (cmds);
3049                                         _editor->session()->add_commands (cmds);
3050                                         diffed_playlists.insert (p);
3051                                 }
3052                         }
3053                 }
3054
3055                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
3056                         (*p)->thaw ();
3057                 }
3058
3059                 _editor->motion_frozen_playlists.clear ();
3060                 _editor->commit_reversible_command();
3061
3062         } else {
3063                 /* no mouse movement */
3064                 if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false)) {
3065                         _editor->point_trim (event, adjusted_current_frame (event));
3066                 }
3067         }
3068
3069         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3070                 i->view->region()->resume_property_changes ();
3071         }
3072 }
3073
3074 void
3075 TrimDrag::aborted (bool movement_occurred)
3076 {
3077         /* Our motion method is changing model state, so use the Undo system
3078            to cancel.  Perhaps not ideal, as this will leave an Undo point
3079            behind which may be slightly odd from the user's point of view.
3080         */
3081
3082         finished (0, true);
3083
3084         if (movement_occurred) {
3085                 _editor->undo ();
3086         }
3087
3088         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
3089                 i->view->region()->resume_property_changes ();
3090         }
3091 }
3092
3093 void
3094 TrimDrag::setup_pointer_frame_offset ()
3095 {
3096         list<DraggingView>::iterator i = _views.begin ();
3097         while (i != _views.end() && i->view != _primary) {
3098                 ++i;
3099         }
3100
3101         if (i == _views.end()) {
3102                 return;
3103         }
3104
3105         switch (_operation) {
3106         case StartTrim:
3107                 _pointer_frame_offset = raw_grab_frame() - i->initial_position;
3108                 break;
3109         case EndTrim:
3110                 _pointer_frame_offset = raw_grab_frame() - i->initial_end;
3111                 break;
3112         case ContentsTrim:
3113                 break;
3114         }
3115 }
3116
3117 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3118         : Drag (e, i),
3119           _copy (c)
3120         , before_state (0)
3121 {
3122         DEBUG_TRACE (DEBUG::Drags, "New MeterMarkerDrag\n");
3123         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
3124         assert (_marker);
3125         _real_section = &_marker->meter();
3126
3127 }
3128
3129 void
3130 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3131 {
3132         Drag::start_grab (event, cursor);
3133         show_verbose_cursor_time (adjusted_current_frame(event));
3134 }
3135
3136 void
3137 MeterMarkerDrag::setup_pointer_frame_offset ()
3138 {
3139         _pointer_frame_offset = raw_grab_frame() - _marker->meter().frame();
3140 }
3141
3142 void
3143 MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
3144 {
3145         if (!_marker->meter().movable()) {
3146                 //return;
3147         }
3148
3149         if (first_move) {
3150
3151                 // create a dummy marker to catch events, then hide it.
3152
3153                 char name[64];
3154                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().divisions_per_bar(), _marker->meter().note_divisor ());
3155
3156                 _marker = new MeterMarker (
3157                         *_editor,
3158                         *_editor->meter_group,
3159                         UIConfiguration::instance().color ("meter marker"),
3160                         name,
3161                         *new MeterSection (_marker->meter())
3162                 );
3163
3164                 /* use the new marker for the grab */
3165                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3166                 _marker->hide();
3167
3168                 TempoMap& map (_editor->session()->tempo_map());
3169                 /* get current state */
3170                 before_state = &map.get_state();
3171
3172                 if (!_copy) {
3173                         _editor->begin_reversible_command (_("move meter mark"));
3174                 } else {
3175                         _editor->begin_reversible_command (_("copy meter mark"));
3176
3177                         Timecode::BBT_Time bbt = _real_section->bbt();
3178
3179                         /* we can't add a meter where one currently exists */
3180                         if (_real_section->frame() < adjusted_current_frame (event, false)) {
3181                                 ++bbt.bars;
3182                         } else {
3183                                 --bbt.bars;
3184                         }
3185                         const double beat = map.bbt_to_beats (bbt);
3186
3187                         if (_real_section->position_lock_style() == AudioTime) {
3188                                 _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor())
3189                                                                , map.frame_time (bbt), beat, bbt);
3190                         } else {
3191                                 _real_section = map.add_meter (Meter (_marker->meter().divisions_per_bar(), _marker->meter().note_divisor()), beat, bbt);
3192                         }
3193                 }
3194         }
3195
3196         framepos_t const pf = adjusted_current_frame (event, false);
3197         if (_marker->meter().position_lock_style() == MusicTime) {
3198                 TempoMap& map (_editor->session()->tempo_map());
3199                 Timecode::BBT_Time bbt;
3200                 map.bbt_time (pf, bbt);
3201                 /* round bbt to bars */
3202                 map.round_bbt (bbt, -1, RoundNearest);
3203
3204                 if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3205                         /* adjust previous tempo to match meter frame */
3206                         _editor->session()->tempo_map().gui_dilate_tempo (_real_section, pf);
3207                 } else if ((bbt.bars != _real_section->bbt().bars && pf > last_pointer_frame())
3208                            || (bbt.bars < _real_section->bbt().bars && pf < last_pointer_frame())) {
3209                         /* move meter beat-based */
3210                         _editor->session()->tempo_map().gui_move_meter (_real_section, bbt);
3211                 }
3212         } else {
3213                 /* AudioTime */
3214                 if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3215                         /* currently disabled in the lib for AudioTime */
3216                         if (_real_section->movable()) {
3217                                 _editor->session()->tempo_map().gui_dilate_tempo (_real_section, pf);
3218                         }
3219                 } else {
3220                         _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
3221                 }
3222         }
3223         _marker->set_position (pf);
3224         show_verbose_cursor_time (_real_section->frame());
3225 }
3226
3227 void
3228 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3229 {
3230         if (!movement_occurred) {
3231                 if (was_double_click()) {
3232                         _editor->edit_meter_marker (*_marker);
3233                 }
3234                 return;
3235         }
3236
3237         TempoMap& map (_editor->session()->tempo_map());
3238
3239         XMLNode &after = map.get_state();
3240         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3241         _editor->commit_reversible_command ();
3242
3243         // delete the dummy marker we used for visual representation while moving.
3244         // a new visual marker will show up automatically.
3245         delete _marker;
3246 }
3247
3248 void
3249 MeterMarkerDrag::aborted (bool moved)
3250 {
3251         _marker->set_position (_marker->meter().frame ());
3252         if (moved) {
3253                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3254                 // delete the dummy marker we used for visual representation while moving.
3255                 // a new visual marker will show up automatically.
3256                 delete _marker;
3257         }
3258 }
3259
3260 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
3261         : Drag (e, i)
3262         , _copy (c)
3263         , before_state (0)
3264 {
3265         DEBUG_TRACE (DEBUG::Drags, "New TempoMarkerDrag\n");
3266
3267         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
3268         _real_section = &_marker->tempo();
3269         _movable = _real_section->movable();
3270         assert (_marker);
3271 }
3272
3273 void
3274 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3275 {
3276         Drag::start_grab (event, cursor);
3277         if (!_real_section->active()) {
3278                 show_verbose_cursor_text (_("inactive"));
3279         } else {
3280                 show_verbose_cursor_time (adjusted_current_frame (event));
3281         }
3282 }
3283
3284 void
3285 TempoMarkerDrag::setup_pointer_frame_offset ()
3286 {
3287         _pointer_frame_offset = raw_grab_frame() - _marker->tempo().frame();
3288 }
3289
3290 void
3291 TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
3292 {
3293         if (!_real_section->active()) {
3294                 return;
3295         }
3296         if (first_move) {
3297
3298                 // mvc drag - create a dummy marker to catch events, hide it.
3299
3300                 char name[64];
3301                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
3302
3303                 TempoSection section (_marker->tempo());
3304
3305                 _marker = new TempoMarker (
3306                         *_editor,
3307                         *_editor->tempo_group,
3308                         UIConfiguration::instance().color ("tempo marker"),
3309                         name,
3310                         *new TempoSection (_marker->tempo())
3311                         );
3312
3313                 /* use the new marker for the grab */
3314                 swap_grab (&_marker->the_item(), 0, GDK_CURRENT_TIME);
3315                 _marker->hide();
3316
3317                 TempoMap& map (_editor->session()->tempo_map());
3318                 /* get current state */
3319                 before_state = &map.get_state();
3320                 if (!_copy) {
3321                         _editor->begin_reversible_command (_("move tempo mark"));
3322                 } else {
3323                         _editor->begin_reversible_command (_("copy tempo mark"));
3324                         framepos_t frame;
3325                         bool use_snap = false;
3326
3327                         if (!_editor->snap_musical()) {
3328                                 frame = adjusted_current_frame (event);
3329                         } else {
3330                                 frame = adjusted_current_frame (event, false);
3331                                 if (ArdourKeyboard::indicates_snap (event->button.state)) {
3332                                         if (_editor->snap_mode() == Editing::SnapOff) {
3333                                                 use_snap = true;
3334                                         } else {
3335                                                 use_snap = false;
3336                                         }
3337                                 } else {
3338                                         if (_editor->snap_mode() == Editing::SnapOff) {
3339                                                 use_snap = false;
3340                                         } else {
3341                                                 use_snap = true;
3342                                         }
3343                                 }
3344                         }
3345
3346                         Timecode::BBT_Time bbt;
3347                         map.bbt_time (frame, bbt);
3348
3349                         /* add new tempo section to map, ensuring we don't refer to existing tempos for snap */
3350
3351                         if (_real_section->position_lock_style() == MusicTime) {
3352                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3353                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3354                                 } else if (use_snap) {
3355                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3356                                 }
3357                                 double const pulse = map.predict_tempo_pulse (_real_section, map.frame_time (bbt));
3358                                 _real_section = map.add_tempo (_marker->tempo(), pulse, _real_section->type());
3359                         } else {
3360                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3361                                         map.round_bbt (bbt, -1, (frame > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3362                                 } else if (use_snap) {
3363                                         map.round_bbt (bbt, _editor->get_grid_beat_divisions (0), RoundNearest);
3364                                 }
3365                                 if (use_snap) {
3366                                         frame = map.predict_tempo_frame (_real_section, bbt);
3367                                 }
3368                                 _real_section = map.add_tempo (_marker->tempo(), frame, _real_section->type());
3369                         }
3370                 }
3371
3372         }
3373
3374         framepos_t pf;
3375
3376         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier ())) {
3377                 double new_bpm = _real_section->beats_per_minute() + ((last_pointer_y() - current_pointer_y()) / 5.0);
3378                 _editor->session()->tempo_map().gui_change_tempo (_real_section, Tempo (new_bpm, _real_section->note_type()));
3379                 stringstream strs;
3380                 strs << new_bpm;
3381                 show_verbose_cursor_text (strs.str());
3382         } else if (_movable && !_real_section->locked_to_meter()) {
3383                 if (!_editor->snap_musical()) {
3384                         /* snap normally (this is not self-referential).*/
3385                         pf = adjusted_current_frame (event);
3386                 } else {
3387                         /* but this is.
3388                            we can't use the map for anything related to tempo,
3389                            so we round bbt using meters, which have no dependency
3390                            on pulse for this kind of thing.
3391                         */
3392                         bool use_snap;
3393                         TempoMap& map (_editor->session()->tempo_map());
3394
3395                         pf = adjusted_current_frame (event, false);
3396                         if (ArdourKeyboard::indicates_snap (event->button.state)) {
3397                                 if (_editor->snap_mode() == Editing::SnapOff) {
3398                                         use_snap = true;
3399                                 } else {
3400                                         use_snap = false;
3401                                 }
3402                         } else {
3403                                 if (_editor->snap_mode() == Editing::SnapOff) {
3404                                         use_snap = false;
3405                                 } else {
3406                                         use_snap = true;
3407                                 }
3408                         }
3409
3410                         Timecode::BBT_Time when;
3411                         map.bbt_time (pf, when);
3412
3413                         if (_real_section->position_lock_style() == MusicTime) {
3414
3415                                 const double pulse = map.predict_tempo_pulse (_real_section, pf);
3416                                 when = map.pulse_to_bbt (pulse);
3417                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3418                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3419                                 } else if (use_snap) {
3420                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3421                                 }
3422                                 const double beat = map.bbt_to_beats (when);
3423                                 map.gui_move_tempo_beat (_real_section, beat);
3424                         } else {
3425                                 if (use_snap && _editor->snap_type() == SnapToBar) {
3426                                         map.round_bbt (when, -1, (pf > _real_section->frame()) ? RoundUpMaybe : RoundDownMaybe);
3427                                 } else if (use_snap) {
3428                                         map.round_bbt (when, _editor->get_grid_beat_divisions (0), RoundNearest);
3429                                 }
3430                                 if (use_snap) {
3431                                         pf = map.predict_tempo_frame (_real_section, when);
3432                                 }
3433                                 map.gui_move_tempo_frame (_real_section, pf);
3434                         }
3435                 }
3436
3437                 show_verbose_cursor_time (_real_section->frame());
3438         }
3439         _marker->set_position (pf);
3440 }
3441
3442 void
3443 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
3444 {
3445         if (!_real_section->active()) {
3446                 return;
3447         }
3448         if (!movement_occurred) {
3449                 if (was_double_click()) {
3450                         _editor->edit_tempo_marker (*_marker);
3451                 }
3452                 return;
3453         }
3454
3455         TempoMap& map (_editor->session()->tempo_map());
3456
3457         XMLNode &after = map.get_state();
3458         _editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
3459         _editor->commit_reversible_command ();
3460
3461         // delete the dummy marker we used for visual representation while moving.
3462         // a new visual marker will show up automatically.
3463         delete _marker;
3464 }
3465
3466 void
3467 TempoMarkerDrag::aborted (bool moved)
3468 {
3469         _marker->set_position (_marker->tempo().frame());
3470         if (moved) {
3471                 TempoMap& map (_editor->session()->tempo_map());
3472                 map.set_state (*before_state, Stateful::current_state_version);
3473                 // delete the dummy marker we used for visual representation while moving.
3474                 // a new visual marker will show up automatically.
3475                 delete _marker;
3476         }
3477 }
3478
3479 BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
3480         : Drag (e, i)
3481         , before_state (0)
3482 {
3483         DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
3484 }
3485
3486 void
3487 BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3488 {
3489         Drag::start_grab (event, cursor);
3490         TempoMap& map (_editor->session()->tempo_map());
3491         ostringstream sstr;
3492         sstr << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute();
3493         show_verbose_cursor_text (sstr.str());
3494 }
3495
3496 void
3497 BBTRulerDrag::setup_pointer_frame_offset ()
3498 {
3499         TempoMap& map (_editor->session()->tempo_map());
3500         _pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (ceil (map.beat_at_frame (raw_grab_frame())));
3501 }
3502
3503 void
3504 BBTRulerDrag::motion (GdkEvent* event, bool first_move)
3505 {
3506         TempoMap& map (_editor->session()->tempo_map());
3507
3508         if (first_move) {
3509                 /* get current state */
3510                 before_state = &map.get_state();
3511                 _editor->begin_reversible_command (_("dilate tempo"));
3512         }
3513
3514         framepos_t const pf = adjusted_current_frame (event, false);
3515
3516         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
3517                 /* adjust previous tempo to match pointer frame */
3518                 _editor->session()->tempo_map().gui_dilate_tempo (last_pointer_frame(), pf);
3519         }
3520         ostringstream sstr;
3521         sstr << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute();
3522         show_verbose_cursor_text (sstr.str());
3523 }
3524
3525 void
3526 BBTRulerDrag::finished (GdkEvent* event, bool movement_occurred)
3527 {
3528         if (!movement_occurred) {
3529                 return;
3530         }
3531
3532         TempoMap& map (_editor->session()->tempo_map());
3533
3534         XMLNode &after = map.get_state();
3535         _editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
3536         _editor->commit_reversible_command ();
3537 }
3538
3539 void
3540 BBTRulerDrag::aborted (bool moved)
3541 {
3542         if (moved) {
3543                 _editor->session()->tempo_map().set_state (*before_state, Stateful::current_state_version);
3544         }
3545 }
3546
3547
3548 CursorDrag::CursorDrag (Editor* e, EditorCursor& c, bool s)
3549         : Drag (e, &c.track_canvas_item(), false)
3550         , _cursor (c)
3551         , _stop (s)
3552         , _grab_zoom (0.0)
3553 {
3554         DEBUG_TRACE (DEBUG::Drags, "New CursorDrag\n");
3555 }
3556
3557 /** Do all the things we do when dragging the playhead to make it look as though
3558  *  we have located, without actually doing the locate (because that would cause
3559  *  the diskstream buffers to be refilled, which is too slow).
3560  */
3561 void
3562 CursorDrag::fake_locate (framepos_t t)
3563 {
3564         if (_editor->session () == 0) {
3565                 return;
3566         }
3567
3568         _editor->playhead_cursor->set_position (t);
3569
3570         Session* s = _editor->session ();
3571         if (s->timecode_transmission_suspended ()) {
3572                 framepos_t const f = _editor->playhead_cursor->current_frame ();
3573                 /* This is asynchronous so it will be sent "now"
3574                  */
3575                 s->send_mmc_locate (f);
3576                 /* These are synchronous and will be sent during the next
3577                    process cycle
3578                 */
3579                 s->queue_full_time_code ();
3580                 s->queue_song_position_pointer ();
3581         }
3582
3583         show_verbose_cursor_time (t);
3584         _editor->UpdateAllTransportClocks (t);
3585 }
3586
3587 void
3588 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
3589 {
3590         Drag::start_grab (event, c);
3591         setup_snap_delta (_editor->playhead_cursor->current_frame ());
3592
3593         _grab_zoom = _editor->samples_per_pixel;
3594
3595         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3596
3597         _editor->snap_to_with_modifier (where, event);
3598
3599         _editor->_dragging_playhead = true;
3600
3601         Session* s = _editor->session ();
3602
3603         /* grab the track canvas item as well */
3604
3605         _cursor.track_canvas_item().grab();
3606
3607         if (s) {
3608                 if (_was_rolling && _stop) {
3609                         s->request_stop ();
3610                 }
3611
3612                 if (s->is_auditioning()) {
3613                         s->cancel_audition ();
3614                 }
3615
3616
3617                 if (AudioEngine::instance()->connected()) {
3618
3619                         /* do this only if we're the engine is connected
3620                          * because otherwise this request will never be
3621                          * serviced and we'll busy wait forever. likewise,
3622                          * notice if we are disconnected while waiting for the
3623                          * request to be serviced.
3624                          */
3625
3626                         s->request_suspend_timecode_transmission ();
3627                         while (AudioEngine::instance()->connected() && !s->timecode_transmission_suspended ()) {
3628                                 /* twiddle our thumbs */
3629                         }
3630                 }
3631         }
3632
3633         fake_locate (where - snap_delta (event->button.state));
3634 }
3635
3636 void
3637 CursorDrag::motion (GdkEvent* event, bool)
3638 {
3639         framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3640         _editor->snap_to_with_modifier (where, event);
3641         if (where != last_pointer_frame()) {
3642                 fake_locate (where - snap_delta (event->button.state));
3643         }
3644 }
3645
3646 void
3647 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
3648 {
3649         _editor->_dragging_playhead = false;
3650
3651         _cursor.track_canvas_item().ungrab();
3652
3653         if (!movement_occurred && _stop) {
3654                 return;
3655         }
3656
3657         motion (event, false);
3658
3659         Session* s = _editor->session ();
3660         if (s) {
3661                 s->request_locate (_editor->playhead_cursor->current_frame (), _was_rolling);
3662                 _editor->_pending_locate_request = true;
3663                 s->request_resume_timecode_transmission ();
3664         }
3665 }
3666
3667 void
3668 CursorDrag::aborted (bool)
3669 {
3670         _cursor.track_canvas_item().ungrab();
3671
3672         if (_editor->_dragging_playhead) {
3673                 _editor->session()->request_resume_timecode_transmission ();
3674                 _editor->_dragging_playhead = false;
3675         }
3676
3677         _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
3678 }
3679
3680 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3681         : RegionDrag (e, i, p, v)
3682 {
3683         DEBUG_TRACE (DEBUG::Drags, "New FadeInDrag\n");
3684 }
3685
3686 void
3687 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3688 {
3689         Drag::start_grab (event, cursor);
3690
3691         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3692         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3693         setup_snap_delta (r->position ());
3694
3695         show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
3696 }
3697
3698 void
3699 FadeInDrag::setup_pointer_frame_offset ()
3700 {
3701         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3702         boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
3703         _pointer_frame_offset = raw_grab_frame() - ((framecnt_t) r->fade_in()->back()->when + r->position());
3704 }
3705
3706 void
3707 FadeInDrag::motion (GdkEvent* event, bool)
3708 {
3709         framecnt_t fade_length;
3710
3711         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3712         _editor->snap_to_with_modifier (pos, event);
3713         pos -= snap_delta (event->button.state);
3714
3715         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3716
3717         if (pos < (region->position() + 64)) {
3718                 fade_length = 64; // this should be a minimum defined somewhere
3719         } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
3720                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3721         } else {
3722                 fade_length = pos - region->position();
3723         }
3724
3725         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3726
3727                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3728
3729                 if (!tmp) {
3730                         continue;
3731                 }
3732
3733                 tmp->reset_fade_in_shape_width (tmp->audio_region(), fade_length);
3734         }
3735
3736         show_verbose_cursor_duration (region->position(), region->position() + fade_length, 32);
3737 }
3738
3739 void
3740 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
3741 {
3742         if (!movement_occurred) {
3743                 return;
3744         }
3745
3746         framecnt_t fade_length;
3747         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3748         _editor->snap_to_with_modifier (pos, event);
3749         pos -= snap_delta (event->button.state);
3750
3751         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3752
3753         if (pos < (region->position() + 64)) {
3754                 fade_length = 64; // this should be a minimum defined somewhere
3755         } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
3756                 fade_length = region->length() - region->fade_out()->back()->when - 1;
3757         } else {
3758                 fade_length = pos - region->position();
3759         }
3760
3761         bool in_command = false;
3762
3763         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3764
3765                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3766
3767                 if (!tmp) {
3768                         continue;
3769                 }
3770
3771                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
3772                 XMLNode &before = alist->get_state();
3773
3774                 tmp->audio_region()->set_fade_in_length (fade_length);
3775                 tmp->audio_region()->set_fade_in_active (true);
3776
3777                 if (!in_command) {
3778                         _editor->begin_reversible_command (_("change fade in length"));
3779                         in_command = true;
3780                 }
3781                 XMLNode &after = alist->get_state();
3782                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3783         }
3784
3785         if (in_command) {
3786                 _editor->commit_reversible_command ();
3787         }
3788 }
3789
3790 void
3791 FadeInDrag::aborted (bool)
3792 {
3793         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3794                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3795
3796                 if (!tmp) {
3797                         continue;
3798                 }
3799
3800                 tmp->reset_fade_in_shape_width (tmp->audio_region(), tmp->audio_region()->fade_in()->back()->when);
3801         }
3802 }
3803
3804 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
3805         : RegionDrag (e, i, p, v)
3806 {
3807         DEBUG_TRACE (DEBUG::Drags, "New FadeOutDrag\n");
3808 }
3809
3810 void
3811 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3812 {
3813         Drag::start_grab (event, cursor);
3814
3815         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3816         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3817         setup_snap_delta (r->last_frame ());
3818
3819         show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
3820 }
3821
3822 void
3823 FadeOutDrag::setup_pointer_frame_offset ()
3824 {
3825         AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
3826         boost::shared_ptr<AudioRegion> r = arv->audio_region ();
3827         _pointer_frame_offset = raw_grab_frame() - (r->length() - (framecnt_t) r->fade_out()->back()->when + r->position());
3828 }
3829
3830 void
3831 FadeOutDrag::motion (GdkEvent* event, bool)
3832 {
3833         framecnt_t fade_length;
3834
3835         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3836         _editor->snap_to_with_modifier (pos, event);
3837         pos -= snap_delta (event->button.state);
3838
3839         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3840
3841         if (pos > (region->last_frame() - 64)) {
3842                 fade_length = 64; // this should really be a minimum fade defined somewhere
3843         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3844                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3845         } else {
3846                 fade_length = region->last_frame() - pos;
3847         }
3848
3849         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3850
3851                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3852
3853                 if (!tmp) {
3854                         continue;
3855                 }
3856
3857                 tmp->reset_fade_out_shape_width (tmp->audio_region(), fade_length);
3858         }
3859
3860         show_verbose_cursor_duration (region->last_frame() - fade_length, region->last_frame());
3861 }
3862
3863 void
3864 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
3865 {
3866         if (!movement_occurred) {
3867                 return;
3868         }
3869
3870         framecnt_t fade_length;
3871
3872         framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
3873         _editor->snap_to_with_modifier (pos, event);
3874         pos -= snap_delta (event->button.state);
3875
3876         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
3877
3878         if (pos > (region->last_frame() - 64)) {
3879                 fade_length = 64; // this should really be a minimum fade defined somewhere
3880         } else if (pos <= region->position() + region->fade_in()->back()->when) {
3881                 fade_length = region->length() - region->fade_in()->back()->when - 1;
3882         } else {
3883                 fade_length = region->last_frame() - pos;
3884         }
3885
3886         bool in_command = false;
3887
3888         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3889
3890                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3891
3892                 if (!tmp) {
3893                         continue;
3894                 }
3895
3896                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
3897                 XMLNode &before = alist->get_state();
3898
3899                 tmp->audio_region()->set_fade_out_length (fade_length);
3900                 tmp->audio_region()->set_fade_out_active (true);
3901
3902                 if (!in_command) {
3903                         _editor->begin_reversible_command (_("change fade out length"));
3904                         in_command = true;
3905                 }
3906                 XMLNode &after = alist->get_state();
3907                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
3908         }
3909
3910         if (in_command) {
3911                 _editor->commit_reversible_command ();
3912         }
3913 }
3914
3915 void
3916 FadeOutDrag::aborted (bool)
3917 {
3918         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
3919                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
3920
3921                 if (!tmp) {
3922                         continue;
3923                 }
3924
3925                 tmp->reset_fade_out_shape_width (tmp->audio_region(), tmp->audio_region()->fade_out()->back()->when);
3926         }
3927 }
3928
3929 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
3930         : Drag (e, i)
3931         , _selection_changed (false)
3932 {
3933         DEBUG_TRACE (DEBUG::Drags, "New MarkerDrag\n");
3934         Gtk::Window* toplevel = _editor->current_toplevel();
3935         _marker = reinterpret_cast<ArdourMarker*> (_item->get_data ("marker"));
3936
3937         assert (_marker);
3938
3939         _points.push_back (ArdourCanvas::Duple (0, 0));
3940
3941         _points.push_back (ArdourCanvas::Duple (0, toplevel ? physical_screen_height (toplevel->get_window()) : 900));
3942 }
3943
3944 MarkerDrag::~MarkerDrag ()
3945 {
3946         for (CopiedLocationInfo::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
3947                 delete i->location;
3948         }
3949 }
3950
3951 MarkerDrag::CopiedLocationMarkerInfo::CopiedLocationMarkerInfo (Location* l, ArdourMarker* m)
3952 {
3953         location = new Location (*l);
3954         markers.push_back (m);
3955         move_both = false;
3956 }
3957
3958 void
3959 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3960 {
3961         Drag::start_grab (event, cursor);
3962
3963         bool is_start;
3964
3965         Location *location = _editor->find_location_from_marker (_marker, is_start);
3966         _editor->_dragging_edit_point = true;
3967
3968         update_item (location);
3969
3970         // _drag_line->show();
3971         // _line->raise_to_top();
3972
3973         if (is_start) {
3974                 show_verbose_cursor_time (location->start());
3975         } else {
3976                 show_verbose_cursor_time (location->end());
3977         }
3978         setup_snap_delta (is_start ? location->start() : location->end());
3979
3980         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3981
3982         switch (op) {
3983         case Selection::Toggle:
3984                 /* we toggle on the button release */
3985                 break;
3986         case Selection::Set:
3987                 if (!_editor->selection->selected (_marker)) {
3988                         _editor->selection->set (_marker);
3989                         _selection_changed = true;
3990                 }
3991                 break;
3992         case Selection::Extend:
3993         {
3994                 Locations::LocationList ll;
3995                 list<ArdourMarker*> to_add;
3996                 framepos_t s, e;
3997                 _editor->selection->markers.range (s, e);
3998                 s = min (_marker->position(), s);
3999                 e = max (_marker->position(), e);
4000                 s = min (s, e);
4001                 e = max (s, e);
4002                 if (e < max_framepos) {
4003                         ++e;
4004                 }
4005                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
4006                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
4007                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
4008                         if (lm) {
4009                                 if (lm->start) {
4010                                         to_add.push_back (lm->start);
4011                                 }
4012                                 if (lm->end) {
4013                                         to_add.push_back (lm->end);
4014                                 }
4015                         }
4016                 }
4017                 if (!to_add.empty()) {
4018                         _editor->selection->add (to_add);
4019                         _selection_changed = true;
4020                 }
4021                 break;
4022         }
4023         case Selection::Add:
4024                 _editor->selection->add (_marker);
4025                 _selection_changed = true;
4026
4027                 break;
4028         }
4029
4030         /* Set up copies for us to manipulate during the drag
4031          */
4032
4033         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
4034
4035                 Location* l = _editor->find_location_from_marker (*i, is_start);
4036
4037                 if (!l) {
4038                         continue;
4039                 }
4040
4041                 if (l->is_mark()) {
4042                         _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4043                 } else {
4044                         /* range: check that the other end of the range isn't
4045                            already there.
4046                         */
4047                         CopiedLocationInfo::iterator x;
4048                         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4049                                 if (*(*x).location == *l) {
4050                                         break;
4051                                 }
4052                         }
4053                         if (x == _copied_locations.end()) {
4054                                 _copied_locations.push_back (CopiedLocationMarkerInfo (l, *i));
4055                         } else {
4056                                 (*x).markers.push_back (*i);
4057                                 (*x).move_both = true;
4058                         }
4059                 }
4060
4061         }
4062 }
4063
4064 void
4065 MarkerDrag::setup_pointer_frame_offset ()
4066 {
4067         bool is_start;
4068         Location *location = _editor->find_location_from_marker (_marker, is_start);
4069         _pointer_frame_offset = raw_grab_frame() - (is_start ? location->start() : location->end());
4070 }
4071
4072 void
4073 MarkerDrag::motion (GdkEvent* event, bool)
4074 {
4075         framecnt_t f_delta = 0;
4076         bool is_start;
4077         bool move_both = false;
4078         Location *real_location;
4079         Location *copy_location = 0;
4080         framecnt_t const sd = snap_delta (event->button.state);
4081
4082         framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
4083         framepos_t next = newframe;
4084
4085         if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
4086                 move_both = true;
4087         }
4088
4089         CopiedLocationInfo::iterator x;
4090
4091         /* find the marker we're dragging, and compute the delta */
4092
4093         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4094
4095                 copy_location = (*x).location;
4096
4097                 if (find (x->markers.begin(), x->markers.end(), _marker) != x->markers.end()) {
4098
4099                         /* this marker is represented by this
4100                          * CopiedLocationMarkerInfo
4101                          */
4102
4103                         if ((real_location = _editor->find_location_from_marker (_marker, is_start)) == 0) {
4104                                 /* que pasa ?? */
4105                                 return;
4106                         }
4107
4108                         if (real_location->is_mark()) {
4109                                 f_delta = newframe - copy_location->start();
4110                         } else {
4111
4112
4113                                 switch (_marker->type()) {
4114                                 case ArdourMarker::SessionStart:
4115                                 case ArdourMarker::RangeStart:
4116                                 case ArdourMarker::LoopStart:
4117                                 case ArdourMarker::PunchIn:
4118                                         f_delta = newframe - copy_location->start();
4119                                         break;
4120
4121                                 case ArdourMarker::SessionEnd:
4122                                 case ArdourMarker::RangeEnd:
4123                                 case ArdourMarker::LoopEnd:
4124                                 case ArdourMarker::PunchOut:
4125                                         f_delta = newframe - copy_location->end();
4126                                         break;
4127                                 default:
4128                                         /* what kind of marker is this ? */
4129                                         return;
4130                                 }
4131                         }
4132
4133                         break;
4134                 }
4135         }
4136
4137         if (x == _copied_locations.end()) {
4138                 /* hmm, impossible - we didn't find the dragged marker */
4139                 return;
4140         }
4141
4142         /* now move them all */
4143
4144         for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4145
4146                 copy_location = x->location;
4147
4148                 if ((real_location = _editor->find_location_from_marker (x->markers.front(), is_start)) == 0) {
4149                         continue;
4150                 }
4151
4152                 if (real_location->locked()) {
4153                         continue;
4154                 }
4155
4156                 if (copy_location->is_mark()) {
4157
4158                         /* now move it */
4159
4160                         copy_location->set_start (copy_location->start() + f_delta);
4161
4162                 } else {
4163
4164                         framepos_t new_start = copy_location->start() + f_delta;
4165                         framepos_t new_end = copy_location->end() + f_delta;
4166
4167                         if (is_start) { // start-of-range marker
4168
4169                                 if (move_both || (*x).move_both) {
4170                                         copy_location->set_start (new_start);
4171                                         copy_location->set_end (new_end);
4172                                 } else  if (new_start < copy_location->end()) {
4173                                         copy_location->set_start (new_start);
4174                                 } else if (newframe > 0) {
4175                                         //_editor->snap_to (next, RoundUpAlways, true);
4176                                         copy_location->set_end (next);
4177                                         copy_location->set_start (newframe);
4178                                 }
4179
4180                         } else { // end marker
4181
4182                                 if (move_both || (*x).move_both) {
4183                                         copy_location->set_end (new_end);
4184                                         copy_location->set_start (new_start);
4185                                 } else if (new_end > copy_location->start()) {
4186                                         copy_location->set_end (new_end);
4187                                 } else if (newframe > 0) {
4188                                         //_editor->snap_to (next, RoundDownAlways, true);
4189                                         copy_location->set_start (next);
4190                                         copy_location->set_end (newframe);
4191                                 }
4192                         }
4193                 }
4194
4195                 update_item (copy_location);
4196
4197                 /* now lookup the actual GUI items used to display this
4198                  * location and move them to wherever the copy of the location
4199                  * is now. This means that the logic in ARDOUR::Location is
4200                  * still enforced, even though we are not (yet) modifying
4201                  * the real Location itself.
4202                  */
4203
4204                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
4205
4206                 if (lm) {
4207                         lm->set_position (copy_location->start(), copy_location->end());
4208                 }
4209
4210         }
4211
4212         assert (!_copied_locations.empty());
4213
4214         show_verbose_cursor_time (newframe);
4215 }
4216
4217 void
4218 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
4219 {
4220         if (!movement_occurred) {
4221
4222                 if (was_double_click()) {
4223                         _editor->rename_marker (_marker);
4224                         return;
4225                 }
4226
4227                 /* just a click, do nothing but finish
4228                    off the selection process
4229                 */
4230
4231                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
4232                 switch (op) {
4233                 case Selection::Set:
4234                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
4235                                 _editor->selection->set (_marker);
4236                                 _selection_changed = true;
4237                         }
4238                         break;
4239
4240                 case Selection::Toggle:
4241                         /* we toggle on the button release, click only */
4242                         _editor->selection->toggle (_marker);
4243                         _selection_changed = true;
4244
4245                         break;
4246
4247                 case Selection::Extend:
4248                 case Selection::Add:
4249                         break;
4250                 }
4251
4252                 if (_selection_changed) {
4253                         _editor->begin_reversible_selection_op(X_("Select Marker Release"));
4254                         _editor->commit_reversible_selection_op();
4255                 }
4256
4257                 return;
4258         }
4259
4260         _editor->_dragging_edit_point = false;
4261
4262         XMLNode &before = _editor->session()->locations()->get_state();
4263         bool in_command = false;
4264
4265         MarkerSelection::iterator i;
4266         CopiedLocationInfo::iterator x;
4267         bool is_start;
4268
4269         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
4270              x != _copied_locations.end() && i != _editor->selection->markers.end();
4271              ++i, ++x) {
4272
4273                 Location * location = _editor->find_location_from_marker (*i, is_start);
4274
4275                 if (location) {
4276
4277                         if (location->locked()) {
4278                                 continue;
4279                         }
4280                         if (!in_command) {
4281                                 _editor->begin_reversible_command ( _("move marker") );
4282                                 in_command = true;
4283                         }
4284                         if (location->is_mark()) {
4285                                 location->set_start (((*x).location)->start());
4286                         } else {
4287                                 location->set (((*x).location)->start(), ((*x).location)->end());
4288                         }
4289                 }
4290         }
4291
4292         if (in_command) {
4293                 XMLNode &after = _editor->session()->locations()->get_state();
4294                 _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
4295                 _editor->commit_reversible_command ();
4296         }
4297 }
4298
4299 void
4300 MarkerDrag::aborted (bool movement_occurred)
4301 {
4302         if (!movement_occurred) {
4303                 return;
4304         }
4305
4306         for (CopiedLocationInfo::iterator x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
4307
4308                 /* move all markers to their original location */
4309
4310
4311                 for (vector<ArdourMarker*>::iterator m = x->markers.begin(); m != x->markers.end(); ++m) {
4312
4313                         bool is_start;
4314                         Location * location = _editor->find_location_from_marker (*m, is_start);
4315
4316                         if (location) {
4317                                 (*m)->set_position (is_start ? location->start() : location->end());
4318                         }
4319                 }
4320         }
4321 }
4322
4323 void
4324 MarkerDrag::update_item (Location*)
4325 {
4326         /* noop */
4327 }
4328
4329 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
4330         : Drag (e, i)
4331         , _fixed_grab_x (0.0)
4332         , _fixed_grab_y (0.0)
4333         , _cumulative_x_drag (0.0)
4334         , _cumulative_y_drag (0.0)
4335         , _pushing (false)
4336         , _final_index (0)
4337 {
4338         if (_zero_gain_fraction < 0.0) {
4339                 _zero_gain_fraction = gain_to_slider_position_with_max (dB_to_coefficient (0.0), Config->get_max_gain());
4340         }
4341
4342         DEBUG_TRACE (DEBUG::Drags, "New ControlPointDrag\n");
4343
4344         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
4345         assert (_point);
4346 }
4347
4348
4349 void
4350 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4351 {
4352         Drag::start_grab (event, _editor->cursors()->fader);
4353
4354         // start the grab at the center of the control point so
4355         // the point doesn't 'jump' to the mouse after the first drag
4356         _fixed_grab_x = _point->get_x();
4357         _fixed_grab_y = _point->get_y();
4358
4359         framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
4360         setup_snap_delta (pos);
4361
4362         float const fraction = 1 - (_point->get_y() / _point->line().height());
4363         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
4364
4365         _pushing = Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::push_points_modifier ());
4366
4367         if (!_point->can_slide ()) {
4368                 _x_constrained = true;
4369         }
4370 }
4371
4372 void
4373 ControlPointDrag::motion (GdkEvent* event, bool first_motion)
4374 {
4375         double dx = _drags->current_pointer_x() - last_pointer_x();
4376         double dy = current_pointer_y() - last_pointer_y();
4377         bool need_snap = true;
4378
4379         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4380                 dx *= 0.1;
4381                 dy *= 0.1;
4382                 need_snap = false;
4383         }
4384
4385         /* coordinate in pixels relative to the start of the region (for region-based automation)
4386            or track (for track-based automation) */
4387         double cx = _fixed_grab_x + _cumulative_x_drag + dx;
4388         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4389
4390         // calculate zero crossing point. back off by .01 to stay on the
4391         // positive side of zero
4392         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
4393
4394         if (_x_constrained) {
4395                 cx = _fixed_grab_x;
4396         }
4397         if (_y_constrained) {
4398                 cy = _fixed_grab_y;
4399         }
4400
4401         _cumulative_x_drag = cx - _fixed_grab_x;
4402         _cumulative_y_drag = cy - _fixed_grab_y;
4403
4404         cx = max (0.0, cx);
4405         cy = max (0.0, cy);
4406         cy = min ((double) _point->line().height(), cy);
4407
4408         // make sure we hit zero when passing through
4409         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
4410                 cy = zero_gain_y;
4411         }
4412
4413         framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
4414
4415         if (!_x_constrained && need_snap) {
4416                 _editor->snap_to_with_modifier (cx_frames, event);
4417         }
4418
4419         cx_frames -= snap_delta (event->button.state);
4420         cx_frames = min (cx_frames, _point->line().maximum_time());
4421
4422         float const fraction = 1.0 - (cy / _point->line().height());
4423
4424         if (first_motion) {
4425                 float const initial_fraction = 1.0 - (_fixed_grab_y / _point->line().height());
4426                 _editor->begin_reversible_command (_("automation event move"));
4427                 _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
4428         }
4429         pair<double, float> result;
4430         result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
4431
4432         show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
4433 }
4434
4435 void
4436 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
4437 {
4438         if (!movement_occurred) {
4439
4440                 /* just a click */
4441                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask (Keyboard::TertiaryModifier))) {
4442                         _editor->reset_point_selection ();
4443                 }
4444
4445         } else {
4446                 _point->line().end_drag (_pushing, _final_index);
4447                 _editor->commit_reversible_command ();
4448         }
4449 }
4450
4451 void
4452 ControlPointDrag::aborted (bool)
4453 {
4454         _point->line().reset ();
4455 }
4456
4457 bool
4458 ControlPointDrag::active (Editing::MouseMode m)
4459 {
4460         if (m == Editing::MouseDraw) {
4461                 /* always active in mouse draw */
4462                 return true;
4463         }
4464
4465         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
4466         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
4467 }
4468
4469 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
4470         : Drag (e, i)
4471         , _line (0)
4472         , _fixed_grab_x (0.0)
4473         , _fixed_grab_y (0.0)
4474         , _cumulative_y_drag (0)
4475         , _before (0)
4476         , _after (0)
4477 {
4478         DEBUG_TRACE (DEBUG::Drags, "New LineDrag\n");
4479 }
4480
4481 void
4482 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4483 {
4484         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
4485         assert (_line);
4486
4487         _item = &_line->grab_item ();
4488
4489         /* need to get x coordinate in terms of parent (TimeAxisItemView)
4490            origin, and ditto for y.
4491         */
4492
4493         double mx = event->button.x;
4494         double my = event->button.y;
4495
4496         _line->grab_item().canvas_to_item (mx, my);
4497
4498         framecnt_t const frame_within_region = (framecnt_t) floor (mx * _editor->samples_per_pixel);
4499
4500         if (!_line->control_points_adjacent (frame_within_region, _before, _after)) {
4501                 /* no adjacent points */
4502                 return;
4503         }
4504
4505         Drag::start_grab (event, _editor->cursors()->fader);
4506
4507         /* store grab start in item frame */
4508         double const bx = _line->nth (_before)->get_x();
4509         double const ax = _line->nth (_after)->get_x();
4510         double const click_ratio = (ax - mx) / (ax - bx);
4511
4512         double const cy = ((_line->nth (_before)->get_y() * click_ratio) + (_line->nth (_after)->get_y() * (1 - click_ratio)));
4513
4514         _fixed_grab_x = mx;
4515         _fixed_grab_y = cy;
4516
4517         double fraction = 1.0 - (cy / _line->height());
4518
4519         show_verbose_cursor_text (_line->get_verbose_cursor_string (fraction));
4520 }
4521
4522 void
4523 LineDrag::motion (GdkEvent* event, bool first_move)
4524 {
4525         double dy = current_pointer_y() - last_pointer_y();
4526
4527         if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::fine_adjust_modifier ())) {
4528                 dy *= 0.1;
4529         }
4530
4531         double cy = _fixed_grab_y + _cumulative_y_drag + dy;
4532
4533         _cumulative_y_drag = cy - _fixed_grab_y;
4534
4535         cy = max (0.0, cy);
4536         cy = min ((double) _line->height(), cy);
4537
4538         double const fraction = 1.0 - (cy / _line->height());
4539         uint32_t ignored;
4540
4541         if (first_move) {
4542                 float const initial_fraction = 1.0 - (_fixed_grab_y / _line->height());
4543
4544                 _editor->begin_reversible_command (_("automation range move"));
4545                 _line->start_drag_line (_before, _after, initial_fraction);
4546         }
4547
4548         /* we are ignoring x position for this drag, so we can just pass in anything */
4549         pair<double, float> result;
4550
4551         result = _line->drag_motion (0, fraction, true, false, ignored);
4552         show_verbose_cursor_text (_line->get_verbose_cursor_string (result.second));
4553 }
4554
4555 void
4556 LineDrag::finished (GdkEvent* event, bool movement_occurred)
4557 {
4558         if (movement_occurred) {
4559                 motion (event, false);
4560                 _line->end_drag (false, 0);
4561                 _editor->commit_reversible_command ();
4562         } else {
4563                 /* add a new control point on the line */
4564
4565                 AutomationTimeAxisView* atv;
4566
4567                 if ((atv = dynamic_cast<AutomationTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4568                         framepos_t where = grab_frame ();
4569
4570                         double cx = 0;
4571                         double cy = _fixed_grab_y;
4572
4573                         _line->grab_item().item_to_canvas (cx, cy);
4574
4575                         atv->add_automation_event (event, where, cy, false);
4576                 } else if (dynamic_cast<AudioTimeAxisView*>(_editor->clicked_axisview) != 0) {
4577                         AudioRegionView* arv;
4578
4579                         if ((arv = dynamic_cast<AudioRegionView*>(_editor->clicked_regionview)) != 0) {
4580                                 arv->add_gain_point_event (&arv->get_gain_line()->grab_item(), event, false);
4581                         }
4582                 }
4583         }
4584 }
4585
4586 void
4587 LineDrag::aborted (bool)
4588 {
4589         _line->reset ();
4590 }
4591
4592 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
4593         : Drag (e, i),
4594           _line (0),
4595           _arv (0),
4596           _region_view_grab_x (0.0),
4597           _cumulative_x_drag (0),
4598           _before (0.0),
4599           _max_x (0)
4600 {
4601         DEBUG_TRACE (DEBUG::Drags, "New FeatureLineDrag\n");
4602 }
4603
4604 void
4605 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
4606 {
4607         Drag::start_grab (event);
4608
4609         _line = reinterpret_cast<Line*> (_item);
4610         assert (_line);
4611
4612         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
4613
4614         double cx = event->button.x;
4615         double cy = event->button.y;
4616
4617         _item->parent()->canvas_to_item (cx, cy);
4618
4619         /* store grab start in parent frame */
4620         _region_view_grab_x = cx;
4621
4622         _before = *(float*) _item->get_data ("position");
4623
4624         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4625
4626         _max_x = _editor->sample_to_pixel(_arv->get_duration());
4627 }
4628
4629 void
4630 FeatureLineDrag::motion (GdkEvent*, bool)
4631 {
4632         double dx = _drags->current_pointer_x() - last_pointer_x();
4633
4634         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
4635
4636         _cumulative_x_drag += dx;
4637
4638         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
4639
4640         if (cx > _max_x){
4641                 cx = _max_x;
4642         }
4643         else if(cx < 0){
4644                 cx = 0;
4645         }
4646
4647         boost::optional<ArdourCanvas::Rect> bbox = _line->bounding_box ();
4648         assert (bbox);
4649         _line->set (ArdourCanvas::Duple (cx, 2.0), ArdourCanvas::Duple (cx, bbox.get().height ()));
4650
4651         float *pos = new float;
4652         *pos = cx;
4653
4654         _line->set_data ("position", pos);
4655
4656         _before = cx;
4657 }
4658
4659 void
4660 FeatureLineDrag::finished (GdkEvent*, bool)
4661 {
4662         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
4663         _arv->update_transient(_before, _before);
4664 }
4665
4666 void
4667 FeatureLineDrag::aborted (bool)
4668 {
4669         //_line->reset ();
4670 }
4671
4672 RubberbandSelectDrag::RubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
4673         : Drag (e, i)
4674         , _vertical_only (false)
4675 {
4676         DEBUG_TRACE (DEBUG::Drags, "New RubberbandSelectDrag\n");
4677 }
4678
4679 void
4680 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4681 {
4682         Drag::start_grab (event);
4683         show_verbose_cursor_time (adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid()));
4684 }
4685
4686 void
4687 RubberbandSelectDrag::motion (GdkEvent* event, bool)
4688 {
4689         framepos_t start;
4690         framepos_t end;
4691         double y1;
4692         double y2;
4693
4694         framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
4695
4696         framepos_t grab = grab_frame ();
4697         if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4698                 _editor->snap_to_with_modifier (grab, event);
4699         } else {
4700                 grab = raw_grab_frame ();
4701         }
4702
4703         /* base start and end on initial click position */
4704
4705         if (pf < grab) {
4706                 start = pf;
4707                 end = grab;
4708         } else {
4709                 end = pf;
4710                 start = grab;
4711         }
4712
4713         if (current_pointer_y() < grab_y()) {
4714                 y1 = current_pointer_y();
4715                 y2 = grab_y();
4716         } else {
4717                 y2 = current_pointer_y();
4718                 y1 = grab_y();
4719         }
4720
4721         if (start != end || y1 != y2) {
4722
4723                 double x1 = _editor->sample_to_pixel (start);
4724                 double x2 = _editor->sample_to_pixel (end);
4725                 const double min_dimension = 2.0;
4726
4727                 if (_vertical_only) {
4728                         /* fixed 10 pixel width */
4729                         x2 = x1 + 10;
4730                 } else {
4731                         if (x2 < x1) {
4732                                 x2 = min (x1 - min_dimension, x2);
4733                         } else {
4734                                 x2 = max (x1 + min_dimension, x2);
4735                         }
4736                 }
4737
4738                 if (y2 < y1) {
4739                         y2 = min (y1 - min_dimension, y2);
4740                 } else {
4741                         y2 = max (y1 + min_dimension, y2);
4742                 }
4743
4744                 /* translate rect into item space and set */
4745
4746                 ArdourCanvas::Rect r (x1, y1, x2, y2);
4747
4748                 /* this drag is a _trackview_only == true drag, so the y1 and
4749                  * y2 (computed using current_pointer_y() and grab_y()) will be
4750                  * relative to the top of the trackview group). The
4751                  * rubberband rect has the same parent/scroll offset as the
4752                  * the trackview group, so we can use the "r" rect directly
4753                  * to set the shape of the rubberband.
4754                  */
4755
4756                 _editor->rubberband_rect->set (r);
4757                 _editor->rubberband_rect->show();
4758                 _editor->rubberband_rect->raise_to_top();
4759
4760                 show_verbose_cursor_time (pf);
4761
4762                 do_select_things (event, true);
4763         }
4764 }
4765
4766 void
4767 RubberbandSelectDrag::do_select_things (GdkEvent* event, bool drag_in_progress)
4768 {
4769         framepos_t x1;
4770         framepos_t x2;
4771         framepos_t grab = grab_frame ();
4772         framepos_t lpf = last_pointer_frame ();
4773
4774         if (!UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
4775                 grab = raw_grab_frame ();
4776                 lpf = _editor->pixel_to_sample_from_event (last_pointer_x());
4777         }
4778
4779         if (grab < lpf) {
4780                 x1 = grab;
4781                 x2 = lpf;
4782         } else {
4783                 x2 = grab;
4784                 x1 = lpf;
4785         }
4786
4787         double y1;
4788         double y2;
4789
4790         if (current_pointer_y() < grab_y()) {
4791                 y1 = current_pointer_y();
4792                 y2 = grab_y();
4793         } else {
4794                 y2 = current_pointer_y();
4795                 y1 = grab_y();
4796         }
4797
4798         select_things (event->button.state, x1, x2, y1, y2, drag_in_progress);
4799 }
4800
4801 void
4802 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
4803 {
4804         if (movement_occurred) {
4805
4806                 motion (event, false);
4807                 do_select_things (event, false);
4808
4809         } else {
4810
4811                 /* just a click */
4812
4813                 bool do_deselect = true;
4814                 MidiTimeAxisView* mtv;
4815
4816                 if ((mtv = dynamic_cast<MidiTimeAxisView*>(_editor->clicked_axisview)) != 0) {
4817                         /* MIDI track */
4818                         if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
4819                                 /* nothing selected */
4820                                 add_midi_region (mtv, true);
4821                                 do_deselect = false;
4822                         }
4823                 }
4824
4825                 /* do not deselect if Primary or Tertiary (toggle-select or
4826                  * extend-select are pressed.
4827                  */
4828
4829                 if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier) &&
4830                     !Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier) &&
4831                     do_deselect) {
4832                         deselect_things ();
4833                 }
4834
4835         }
4836
4837         _editor->rubberband_rect->hide();
4838 }
4839
4840 void
4841 RubberbandSelectDrag::aborted (bool)
4842 {
4843         _editor->rubberband_rect->hide ();
4844 }
4845
4846 TimeFXDrag::TimeFXDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, std::list<RegionView*> const & v)
4847         : RegionDrag (e, i, p, v)
4848 {
4849         DEBUG_TRACE (DEBUG::Drags, "New TimeFXDrag\n");
4850 }
4851
4852 void
4853 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
4854 {
4855         Drag::start_grab (event, cursor);
4856
4857         _editor->get_selection().add (_primary);
4858
4859         framepos_t where = _primary->region()->position();
4860         setup_snap_delta (where);
4861
4862         show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
4863 }
4864
4865 void
4866 TimeFXDrag::motion (GdkEvent* event, bool)
4867 {
4868         RegionView* rv = _primary;
4869         StreamView* cv = rv->get_time_axis_view().view ();
4870
4871         pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
4872         int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
4873         int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
4874         framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
4875         _editor->snap_to_with_modifier (pf, event);
4876         pf -= snap_delta (event->button.state);
4877
4878         if (pf > rv->region()->position()) {
4879                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
4880         }
4881
4882         show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
4883 }
4884
4885 void
4886 TimeFXDrag::finished (GdkEvent* event, bool movement_occurred)
4887 {
4888         /* this may have been a single click, no drag. We still want the dialog
4889            to show up in that case, so that the user can manually edit the
4890            parameters for the timestretch.
4891         */
4892
4893         float fraction = 1.0;
4894
4895         if (movement_occurred) {
4896
4897                 motion (event, false);
4898
4899                 _primary->get_time_axis_view().hide_timestretch ();
4900
4901                 framepos_t adjusted_frame_pos = adjusted_current_frame (event);
4902
4903                 if (adjusted_frame_pos < _primary->region()->position()) {
4904                         /* backwards drag of the left edge - not usable */
4905                         return;
4906                 }
4907
4908                 framecnt_t newlen = adjusted_frame_pos - _primary->region()->position();
4909
4910                 fraction = (double) newlen / (double) _primary->region()->length();
4911
4912 #ifndef USE_RUBBERBAND
4913                 // Soundtouch uses fraction / 100 instead of normal (/ 1)
4914                 if (_primary->region()->data_type() == DataType::AUDIO) {
4915                         fraction = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
4916                 }
4917 #endif
4918         }
4919
4920         if (!_editor->get_selection().regions.empty()) {
4921                 /* primary will already be included in the selection, and edit
4922                    group shared editing will propagate selection across
4923                    equivalent regions, so just use the current region
4924                    selection.
4925                 */
4926
4927                 if (_editor->time_stretch (_editor->get_selection().regions, fraction) == -1) {
4928                         error << _("An error occurred while executing time stretch operation") << endmsg;
4929                 }
4930         }
4931 }
4932
4933 void
4934 TimeFXDrag::aborted (bool)
4935 {
4936         _primary->get_time_axis_view().hide_timestretch ();
4937 }
4938
4939 ScrubDrag::ScrubDrag (Editor* e, ArdourCanvas::Item* i)
4940         : Drag (e, i)
4941 {
4942         DEBUG_TRACE (DEBUG::Drags, "New ScrubDrag\n");
4943 }
4944
4945 void
4946 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
4947 {
4948         Drag::start_grab (event);
4949 }
4950
4951 void
4952 ScrubDrag::motion (GdkEvent* /*event*/, bool)
4953 {
4954         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
4955 }
4956
4957 void
4958 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
4959 {
4960         if (movement_occurred && _editor->session()) {
4961                 /* make sure we stop */
4962                 _editor->session()->request_transport_speed (0.0);
4963         }
4964 }
4965
4966 void
4967 ScrubDrag::aborted (bool)
4968 {
4969         /* XXX: TODO */
4970 }
4971
4972 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
4973         : Drag (e, i)
4974         , _operation (o)
4975         , _add (false)
4976         , _time_selection_at_start (!_editor->get_selection().time.empty())
4977 {
4978         DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
4979
4980         if (_time_selection_at_start) {
4981                 start_at_start = _editor->get_selection().time.start();
4982                 end_at_start = _editor->get_selection().time.end_frame();
4983         }
4984 }
4985
4986 void
4987 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
4988 {
4989         if (_editor->session() == 0) {
4990                 return;
4991         }
4992
4993         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
4994
4995         switch (_operation) {
4996         case CreateSelection:
4997                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
4998                         _add = true;
4999                 } else {
5000                         _add = false;
5001                 }
5002                 cursor = _editor->cursors()->selector;
5003                 Drag::start_grab (event, cursor);
5004                 break;
5005
5006         case SelectionStartTrim:
5007                 if (_editor->clicked_axisview) {
5008                         _editor->clicked_axisview->order_selection_trims (_item, true);
5009                 }
5010                 Drag::start_grab (event, _editor->cursors()->left_side_trim);
5011                 break;
5012
5013         case SelectionEndTrim:
5014                 if (_editor->clicked_axisview) {
5015                         _editor->clicked_axisview->order_selection_trims (_item, false);
5016                 }
5017                 Drag::start_grab (event, _editor->cursors()->right_side_trim);
5018                 break;
5019
5020         case SelectionMove:
5021                 Drag::start_grab (event, cursor);
5022                 break;
5023
5024         case SelectionExtend:
5025                 Drag::start_grab (event, cursor);
5026                 break;
5027         }
5028
5029         if (_operation == SelectionMove) {
5030                 show_verbose_cursor_time (_editor->selection->time[_editor->clicked_selection].start);
5031         } else {
5032                 show_verbose_cursor_time (adjusted_current_frame (event));
5033         }
5034 }
5035
5036 void
5037 SelectionDrag::setup_pointer_frame_offset ()
5038 {
5039         switch (_operation) {
5040         case CreateSelection:
5041                 _pointer_frame_offset = 0;
5042                 break;
5043
5044         case SelectionStartTrim:
5045         case SelectionMove:
5046                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].start;
5047                 break;
5048
5049         case SelectionEndTrim:
5050                 _pointer_frame_offset = raw_grab_frame() - _editor->selection->time[_editor->clicked_selection].end;
5051                 break;
5052
5053         case SelectionExtend:
5054                 break;
5055         }
5056 }
5057
5058 void
5059 SelectionDrag::motion (GdkEvent* event, bool first_move)
5060 {
5061         framepos_t start = 0;
5062         framepos_t end = 0;
5063         framecnt_t length = 0;
5064         framecnt_t distance = 0;
5065
5066         framepos_t const pending_position = adjusted_current_frame (event);
5067
5068         if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
5069                 return;
5070         }
5071
5072         switch (_operation) {
5073         case CreateSelection:
5074         {
5075                 framepos_t grab = grab_frame ();
5076
5077                 if (first_move) {
5078                         grab = adjusted_current_frame (event, false);
5079                         if (grab < pending_position) {
5080                                 _editor->snap_to (grab, RoundDownMaybe);
5081                         }  else {
5082                                 _editor->snap_to (grab, RoundUpMaybe);
5083                         }
5084                 }
5085
5086                 if (pending_position < grab) {
5087                         start = pending_position;
5088                         end = grab;
5089                 } else {
5090                         end = pending_position;
5091                         start = grab;
5092                 }
5093
5094                 /* first drag: Either add to the selection
5095                    or create a new selection
5096                 */
5097
5098                 if (first_move) {
5099
5100                         if (_add) {
5101
5102                                 /* adding to the selection */
5103                                 _editor->set_selected_track_as_side_effect (Selection::Add);
5104                                 _editor->clicked_selection = _editor->selection->add (start, end);
5105                                 _add = false;
5106
5107                         } else {
5108
5109                                 /* new selection */
5110
5111                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5112                                         _editor->set_selected_track_as_side_effect (Selection::Set);
5113                                 }
5114
5115                                 _editor->clicked_selection = _editor->selection->set (start, end);
5116                         }
5117                 }
5118
5119                 //if user is selecting a range on an automation track, bail out here before we get to the grouped stuff,
5120                 // because the grouped stuff will start working on tracks (routeTAVs), and end up removing this
5121                 AutomationTimeAxisView *atest = dynamic_cast<AutomationTimeAxisView *>(_editor->clicked_axisview);
5122                 if (atest) {
5123                         _editor->selection->add (atest);
5124                         break;
5125                 }
5126
5127                 /* select all tracks within the rectangle that we've marked out so far */
5128                 TrackViewList new_selection;
5129                 TrackViewList& all_tracks (_editor->track_views);
5130
5131                 ArdourCanvas::Coord const top = grab_y();
5132                 ArdourCanvas::Coord const bottom = current_pointer_y();
5133
5134                 if (top >= 0 && bottom >= 0) {
5135
5136                         //first, find the tracks that are covered in the y range selection
5137                         for (TrackViewList::const_iterator i = all_tracks.begin(); i != all_tracks.end(); ++i) {
5138                                 if ((*i)->covered_by_y_range (top, bottom)) {
5139                                         new_selection.push_back (*i);
5140                                 }
5141                         }
5142
5143                         //now find any tracks that are GROUPED with the tracks we selected
5144                         TrackViewList grouped_add = new_selection;
5145                         for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
5146                                 RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
5147                                 if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::select.property_id) ) {
5148                                         for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
5149                                                 RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
5150                                                 if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
5151                                                         grouped_add.push_back (*j);
5152                                         }
5153                                 }
5154                         }
5155
5156                         //now compare our list with the current selection, and add or remove as necessary
5157                         //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
5158                         TrackViewList tracks_to_add;
5159                         TrackViewList tracks_to_remove;
5160                         for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
5161                                 if ( !_editor->selection->tracks.contains ( *i ) )
5162                                         tracks_to_add.push_back ( *i );
5163                         for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
5164                                 if ( !grouped_add.contains ( *i ) )
5165                                         tracks_to_remove.push_back ( *i );
5166                         _editor->selection->add(tracks_to_add);
5167                         _editor->selection->remove(tracks_to_remove);
5168
5169                 }
5170         }
5171         break;
5172
5173         case SelectionStartTrim:
5174
5175                 end = _editor->selection->time[_editor->clicked_selection].end;
5176
5177                 if (pending_position > end) {
5178                         start = end;
5179                 } else {
5180                         start = pending_position;
5181                 }
5182                 break;
5183
5184         case SelectionEndTrim:
5185
5186                 start = _editor->selection->time[_editor->clicked_selection].start;
5187
5188                 if (pending_position < start) {
5189                         end = start;
5190                 } else {
5191                         end = pending_position;
5192                 }
5193
5194                 break;
5195
5196         case SelectionMove:
5197
5198                 start = _editor->selection->time[_editor->clicked_selection].start;
5199                 end = _editor->selection->time[_editor->clicked_selection].end;
5200
5201                 length = end - start;
5202                 distance = pending_position - start;
5203                 start = pending_position;
5204                 _editor->snap_to (start);
5205
5206                 end = start + length;
5207
5208                 break;
5209
5210         case SelectionExtend:
5211                 break;
5212         }
5213
5214         if (start != end) {
5215                 switch (_operation) {
5216                 case SelectionMove:
5217                         if (_time_selection_at_start) {
5218                                 _editor->selection->move_time (distance);
5219                         }
5220                         break;
5221                 default:
5222                         _editor->selection->replace (_editor->clicked_selection, start, end);
5223                 }
5224         }
5225
5226         if (_operation == SelectionMove) {
5227                 show_verbose_cursor_time(start);
5228         } else {
5229                 show_verbose_cursor_time(pending_position);
5230         }
5231 }
5232
5233 void
5234 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
5235 {
5236         Session* s = _editor->session();
5237
5238         _editor->begin_reversible_selection_op (X_("Change Time Selection"));
5239         if (movement_occurred) {
5240                 motion (event, false);
5241                 /* XXX this is not object-oriented programming at all. ick */
5242                 if (_editor->selection->time.consolidate()) {
5243                         _editor->selection->TimeChanged ();
5244                 }
5245
5246                 /* XXX what if its a music time selection? */
5247                 if (s) {
5248                         if (s->get_play_range() && s->transport_rolling()) {
5249                                 s->request_play_range (&_editor->selection->time, true);
5250                         } else if (!s->config.get_external_sync()) {
5251                                 if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
5252                                         if (_operation == SelectionEndTrim)
5253                                                 _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
5254                                         else
5255                                                 s->request_locate (_editor->get_selection().time.start());
5256                                 }
5257                         }
5258
5259                         if (_editor->get_selection().time.length() != 0) {
5260                                 s->set_range_selection (_editor->get_selection().time.start(), _editor->get_selection().time.end_frame());
5261                         } else {
5262                                 s->clear_range_selection ();
5263                         }
5264                 }
5265
5266         } else {
5267                 /* just a click, no pointer movement.
5268                  */
5269
5270                 if (_operation == SelectionExtend) {
5271                         if (_time_selection_at_start) {
5272                                 framepos_t pos = adjusted_current_frame (event, false);
5273                                 framepos_t start = min (pos, start_at_start);
5274                                 framepos_t end = max (pos, end_at_start);
5275                                 _editor->selection->set (start, end);
5276                         }
5277                 } else {
5278                         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5279                                 if (_editor->clicked_selection) {
5280                                         _editor->selection->remove (_editor->clicked_selection);
5281                                 }
5282                         } else {
5283                                 if (!_editor->clicked_selection) {
5284                                         _editor->selection->clear_time();
5285                                 }
5286                         }
5287                 }
5288
5289                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
5290                         _editor->selection->set (_editor->clicked_axisview);
5291                 }
5292
5293                 if (s && s->get_play_range () && s->transport_rolling()) {
5294                         s->request_stop (false, false);
5295                 }
5296
5297         }
5298
5299         _editor->stop_canvas_autoscroll ();
5300         _editor->clicked_selection = 0;
5301         _editor->commit_reversible_selection_op ();
5302 }
5303
5304 void
5305 SelectionDrag::aborted (bool)
5306 {
5307         /* XXX: TODO */
5308 }
5309
5310 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
5311         : Drag (e, i, false),
5312           _operation (o),
5313           _copy (false)
5314 {
5315         DEBUG_TRACE (DEBUG::Drags, "New RangeMarkerBarDrag\n");
5316
5317         _drag_rect = new ArdourCanvas::Rectangle (_editor->time_line_group,
5318                                                   ArdourCanvas::Rect (0.0, 0.0, 0.0,
5319                                                                       physical_screen_height (_editor->current_toplevel()->get_window())));
5320         _drag_rect->hide ();
5321
5322         _drag_rect->set_fill_color (UIConfiguration::instance().color ("range drag rect"));
5323         _drag_rect->set_outline_color (UIConfiguration::instance().color ("range drag rect"));
5324 }
5325
5326 RangeMarkerBarDrag::~RangeMarkerBarDrag()
5327 {
5328         /* normal canvas items will be cleaned up when their parent group is deleted. But
5329            this item is created as the child of a long-lived parent group, and so we
5330            need to explicitly delete it.
5331         */
5332         delete _drag_rect;
5333 }
5334
5335 void
5336 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5337 {
5338         if (_editor->session() == 0) {
5339                 return;
5340         }
5341
5342         Gdk::Cursor* cursor = MouseCursors::invalid_cursor();
5343
5344         if (!_editor->temp_location) {
5345                 _editor->temp_location = new Location (*_editor->session());
5346         }
5347
5348         switch (_operation) {
5349         case CreateSkipMarker:
5350         case CreateRangeMarker:
5351         case CreateTransportMarker:
5352         case CreateCDMarker:
5353
5354                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::CopyModifier)) {
5355                         _copy = true;
5356                 } else {
5357                         _copy = false;
5358                 }
5359                 cursor = _editor->cursors()->selector;
5360                 break;
5361         }
5362
5363         Drag::start_grab (event, cursor);
5364
5365         show_verbose_cursor_time (adjusted_current_frame (event));
5366 }
5367
5368 void
5369 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
5370 {
5371         framepos_t start = 0;
5372         framepos_t end = 0;
5373         ArdourCanvas::Rectangle *crect;
5374
5375         switch (_operation) {
5376         case CreateSkipMarker:
5377                 crect = _editor->range_bar_drag_rect;
5378                 break;
5379         case CreateRangeMarker:
5380                 crect = _editor->range_bar_drag_rect;
5381                 break;
5382         case CreateTransportMarker:
5383                 crect = _editor->transport_bar_drag_rect;
5384                 break;
5385         case CreateCDMarker:
5386                 crect = _editor->cd_marker_bar_drag_rect;
5387                 break;
5388         default:
5389                 error << string_compose (_("programming_error: %1"), "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()") << endmsg;
5390                 return;
5391                 break;
5392         }
5393
5394         framepos_t const pf = adjusted_current_frame (event);
5395
5396         if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
5397                 framepos_t grab = grab_frame ();
5398                 _editor->snap_to (grab);
5399
5400                 if (pf < grab_frame()) {
5401                         start = pf;
5402                         end = grab;
5403                 } else {
5404                         end = pf;
5405                         start = grab;
5406                 }
5407
5408                 /* first drag: Either add to the selection
5409                    or create a new selection.
5410                 */
5411
5412                 if (first_move) {
5413
5414                         _editor->temp_location->set (start, end);
5415
5416                         crect->show ();
5417
5418                         update_item (_editor->temp_location);
5419                         _drag_rect->show();
5420                         //_drag_rect->raise_to_top();
5421
5422                 }
5423         }
5424
5425         if (start != end) {
5426                 _editor->temp_location->set (start, end);
5427
5428                 double x1 = _editor->sample_to_pixel (start);
5429                 double x2 = _editor->sample_to_pixel (end);
5430                 crect->set_x0 (x1);
5431                 crect->set_x1 (x2);
5432
5433                 update_item (_editor->temp_location);
5434         }
5435
5436         show_verbose_cursor_time (pf);
5437
5438 }
5439
5440 void
5441 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
5442 {
5443         Location * newloc = 0;
5444         string rangename;
5445         int flags;
5446
5447         if (movement_occurred) {
5448                 motion (event, false);
5449                 _drag_rect->hide();
5450
5451                 switch (_operation) {
5452                 case CreateSkipMarker:
5453                 case CreateRangeMarker:
5454                 case CreateCDMarker:
5455                     {
5456                         XMLNode &before = _editor->session()->locations()->get_state();
5457                         if (_operation == CreateSkipMarker) {
5458                                 _editor->begin_reversible_command (_("new skip marker"));
5459                                 _editor->session()->locations()->next_available_name(rangename,_("skip"));
5460                                 flags = Location::IsRangeMarker | Location::IsSkip;
5461                                 _editor->range_bar_drag_rect->hide();
5462                         } else if (_operation == CreateCDMarker) {
5463                                 _editor->session()->locations()->next_available_name(rangename, _("CD"));
5464                                 _editor->begin_reversible_command (_("new CD marker"));
5465                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
5466                                 _editor->cd_marker_bar_drag_rect->hide();
5467                         } else {
5468                                 _editor->begin_reversible_command (_("new skip marker"));
5469                                 _editor->session()->locations()->next_available_name(rangename, _("unnamed"));
5470                                 flags = Location::IsRangeMarker;
5471                                 _editor->range_bar_drag_rect->hide();
5472                         }
5473                         newloc = new Location (
5474                                 *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
5475                                 );
5476
5477                         _editor->session()->locations()->add (newloc, true);
5478                         XMLNode &after = _editor->session()->locations()->get_state();
5479                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
5480                         _editor->commit_reversible_command ();
5481                         break;
5482                     }
5483
5484                 case CreateTransportMarker:
5485                         // popup menu to pick loop or punch
5486                         _editor->new_transport_marker_context_menu (&event->button, _item);
5487                         break;
5488                 }
5489
5490         } else {
5491
5492                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
5493
5494                 if (_operation == CreateTransportMarker) {
5495
5496                         /* didn't drag, so just locate */
5497
5498                         _editor->session()->request_locate (grab_frame(), _editor->session()->transport_rolling());
5499
5500                 } else if (_operation == CreateCDMarker) {
5501
5502                         /* didn't drag, but mark is already created so do
5503                          * nothing */
5504
5505                 } else { /* operation == CreateRangeMarker || CreateSkipMarker */
5506
5507                         framepos_t start;
5508                         framepos_t end;
5509
5510                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
5511
5512                         if (end == max_framepos) {
5513                                 end = _editor->session()->current_end_frame ();
5514                         }
5515
5516                         if (start == max_framepos) {
5517                                 start = _editor->session()->current_start_frame ();
5518                         }
5519
5520                         switch (_editor->mouse_mode) {
5521                         case MouseObject:
5522                                 /* find the two markers on either side and then make the selection from it */
5523                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set, false);
5524                                 break;
5525
5526                         case MouseRange:
5527                                 /* find the two markers on either side of the click and make the range out of it */
5528                                 _editor->selection->set (start, end);
5529                                 break;
5530
5531                         default:
5532                                 break;
5533                         }
5534                 }
5535         }
5536
5537         _editor->stop_canvas_autoscroll ();
5538 }
5539
5540 void
5541 RangeMarkerBarDrag::aborted (bool movement_occurred)
5542 {
5543         if (movement_occurred) {
5544                 _drag_rect->hide ();
5545         }
5546 }
5547
5548 void
5549 RangeMarkerBarDrag::update_item (Location* location)
5550 {
5551         double const x1 = _editor->sample_to_pixel (location->start());
5552         double const x2 = _editor->sample_to_pixel (location->end());
5553
5554         _drag_rect->set_x0 (x1);
5555         _drag_rect->set_x1 (x2);
5556 }
5557
5558 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
5559         : Drag (e, i)
5560         , _cumulative_dx (0)
5561         , _cumulative_dy (0)
5562         , _was_selected (false)
5563 {
5564         DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
5565
5566         _primary = reinterpret_cast<NoteBase*> (_item->get_data ("notebase"));
5567         assert (_primary);
5568         _region = &_primary->region_view ();
5569         _note_height = _region->midi_stream_view()->note_height ();
5570 }
5571
5572 void
5573 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
5574 {
5575         Drag::start_grab (event);
5576         setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
5577
5578         if (!(_was_selected = _primary->selected())) {
5579
5580                 /* tertiary-click means extend selection - we'll do that on button release,
5581                    so don't add it here, because otherwise we make it hard to figure
5582                    out the "extend-to" range.
5583                 */
5584
5585                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
5586
5587                 if (!extend) {
5588                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
5589
5590                         if (add) {
5591                                 _region->note_selected (_primary, true);
5592                         } else {
5593                                 _editor->get_selection().clear_points();
5594                                 _region->unique_select (_primary);
5595                         }
5596                 }
5597         }
5598 }
5599
5600 /** @return Current total drag x change in frames */
5601 frameoffset_t
5602 NoteDrag::total_dx (const guint state) const
5603 {
5604         /* dx in frames */
5605         frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
5606
5607         /* primary note time */
5608         frameoffset_t const n = _region->source_beats_to_absolute_frames (_primary->note()->time ());
5609
5610         /* new time of the primary note in session frames */
5611         frameoffset_t st = n + dx + snap_delta (state);
5612
5613         framepos_t const rp = _region->region()->position ();
5614
5615         /* prevent the note being dragged earlier than the region's position */
5616         st = max (st, rp);
5617
5618         /* possibly snap and return corresponding delta */
5619
5620         bool snap = true;
5621
5622         if (ArdourKeyboard::indicates_snap (state)) {
5623                 if (_editor->snap_mode () != SnapOff) {
5624                         snap = false;
5625                 }
5626         } else {
5627                 if (_editor->snap_mode () == SnapOff) {
5628                         snap = false;
5629                         /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
5630                         if (ArdourKeyboard::indicates_snap_delta (state)) {
5631                                 snap = true;
5632                         }
5633                 }
5634         }
5635
5636         frameoffset_t ret;
5637         if (snap) {
5638                 bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
5639                 ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
5640         } else {
5641                 ret = st - n - snap_delta (state);
5642         }
5643         return ret;
5644 }
5645
5646 /** @return Current total drag y change in note number */
5647 int8_t
5648 NoteDrag::total_dy () const
5649 {
5650         MidiStreamView* msv = _region->midi_stream_view ();
5651         double const y = _region->midi_view()->y_position ();
5652         /* new current note */
5653         uint8_t n = msv->y_to_note (current_pointer_y () - y);
5654         /* clamp */
5655         n = max (msv->lowest_note(), n);
5656         n = min (msv->highest_note(), n);
5657         /* and work out delta */
5658         return n - msv->y_to_note (grab_y() - y);
5659 }
5660
5661 void
5662 NoteDrag::motion (GdkEvent * event, bool)
5663 {
5664         /* Total change in x and y since the start of the drag */
5665         frameoffset_t const dx = total_dx (event->button.state);
5666         int8_t const dy = total_dy ();
5667
5668         /* Now work out what we have to do to the note canvas items to set this new drag delta */
5669         double const tdx = _editor->sample_to_pixel (dx) - _cumulative_dx;
5670         double const tdy = -dy * _note_height - _cumulative_dy;
5671
5672         if (tdx || tdy) {
5673                 _cumulative_dx += tdx;
5674                 _cumulative_dy += tdy;
5675
5676                 int8_t note_delta = total_dy();
5677
5678                 _region->move_selection (tdx, tdy, note_delta);
5679
5680                 /* the new note value may be the same as the old one, but we
5681                  * don't know what that means because the selection may have
5682                  * involved more than one note and we might be doing something
5683                  * odd with them. so show the note value anyway, always.
5684                  */
5685
5686                 uint8_t new_note = min (max (_primary->note()->note() + note_delta, 0), 127);
5687
5688                 _region->show_verbose_cursor_for_new_note_value (_primary->note(), new_note);
5689         }
5690 }
5691
5692 void
5693 NoteDrag::finished (GdkEvent* ev, bool moved)
5694 {
5695         if (!moved) {
5696                 /* no motion - select note */
5697
5698                 if (_editor->current_mouse_mode() == Editing::MouseContent ||
5699                     _editor->current_mouse_mode() == Editing::MouseDraw) {
5700
5701                         bool changed = false;
5702
5703                         if (_was_selected) {
5704                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5705                                 if (add) {
5706                                         _region->note_deselected (_primary);
5707                                         changed = true;
5708                                 } else {
5709                                         _editor->get_selection().clear_points();
5710                                         _region->unique_select (_primary);
5711                                         changed = true;
5712                                 }
5713                         } else {
5714                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
5715                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
5716
5717                                 if (!extend && !add && _region->selection_size() > 1) {
5718                                         _editor->get_selection().clear_points();
5719                                         _region->unique_select (_primary);
5720                                         changed = true;
5721                                 } else if (extend) {
5722                                         _region->note_selected (_primary, true, true);
5723                                         changed = true;
5724                                 } else {
5725                                         /* it was added during button press */
5726                                         changed = true;
5727
5728                                 }
5729                         }
5730
5731                         if (changed) {
5732                                 _editor->begin_reversible_selection_op(X_("Select Note Release"));
5733                                 _editor->commit_reversible_selection_op();
5734                         }
5735                 }
5736         } else {
5737                 _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
5738         }
5739 }
5740
5741 void
5742 NoteDrag::aborted (bool)
5743 {
5744         /* XXX: TODO */
5745 }
5746
5747 /** Make an AutomationRangeDrag for lines in an AutomationTimeAxisView */
5748 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, AutomationTimeAxisView* atv, list<AudioRange> const & r)
5749         : Drag (editor, atv->base_item ())
5750         , _ranges (r)
5751         , _y_origin (atv->y_position())
5752         , _nothing_to_drag (false)
5753 {
5754         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5755         setup (atv->lines ());
5756 }
5757
5758 /** Make an AutomationRangeDrag for region gain lines or MIDI controller regions */
5759 AutomationRangeDrag::AutomationRangeDrag (Editor* editor, RegionView* rv, list<AudioRange> const & r)
5760         : Drag (editor, rv->get_canvas_group ())
5761         , _ranges (r)
5762         , _y_origin (rv->get_time_axis_view().y_position())
5763         , _nothing_to_drag (false)
5764         , _integral (false)
5765 {
5766         DEBUG_TRACE (DEBUG::Drags, "New AutomationRangeDrag\n");
5767
5768         list<boost::shared_ptr<AutomationLine> > lines;
5769
5770         AudioRegionView*      audio_view;
5771         AutomationRegionView* automation_view;
5772         if ((audio_view = dynamic_cast<AudioRegionView*>(rv))) {
5773                 lines.push_back (audio_view->get_gain_line ());
5774         } else if ((automation_view = dynamic_cast<AutomationRegionView*>(rv))) {
5775                 lines.push_back (automation_view->line ());
5776                 _integral = true;
5777         } else {
5778                 error << _("Automation range drag created for invalid region type") << endmsg;
5779         }
5780
5781         setup (lines);
5782 }
5783
5784 /** @param lines AutomationLines to drag.
5785  *  @param offset Offset from the session start to the points in the AutomationLines.
5786  */
5787 void
5788 AutomationRangeDrag::setup (list<boost::shared_ptr<AutomationLine> > const & lines)
5789 {
5790         /* find the lines that overlap the ranges being dragged */
5791         list<boost::shared_ptr<AutomationLine> >::const_iterator i = lines.begin ();
5792         while (i != lines.end ()) {
5793                 list<boost::shared_ptr<AutomationLine> >::const_iterator j = i;
5794                 ++j;
5795
5796                 pair<framepos_t, framepos_t> r = (*i)->get_point_x_range ();
5797
5798                 /* check this range against all the AudioRanges that we are using */
5799                 list<AudioRange>::const_iterator k = _ranges.begin ();
5800                 while (k != _ranges.end()) {
5801                         if (k->coverage (r.first, r.second) != Evoral::OverlapNone) {
5802                                 break;
5803                         }
5804                         ++k;
5805                 }
5806
5807                 /* add it to our list if it overlaps at all */
5808                 if (k != _ranges.end()) {
5809                         Line n;
5810                         n.line = *i;
5811                         n.state = 0;
5812                         n.range = r;
5813                         _lines.push_back (n);
5814                 }
5815
5816                 i = j;
5817         }
5818
5819         /* Now ::lines contains the AutomationLines that somehow overlap our drag */
5820 }
5821
5822 double
5823 AutomationRangeDrag::y_fraction (boost::shared_ptr<AutomationLine> line, double global_y) const
5824 {
5825         return 1.0 - ((global_y - _y_origin) / line->height());
5826 }
5827
5828 double
5829 AutomationRangeDrag::value (boost::shared_ptr<AutomationList> list, double x) const
5830 {
5831         const double v = list->eval(x);
5832         return _integral ? rint(v) : v;
5833 }
5834
5835 void
5836 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
5837 {
5838         Drag::start_grab (event, cursor);
5839
5840         /* Get line states before we start changing things */
5841         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5842                 i->state = &i->line->get_state ();
5843                 i->original_fraction = y_fraction (i->line, current_pointer_y());
5844         }
5845
5846         if (_ranges.empty()) {
5847
5848                 /* No selected time ranges: drag all points */
5849                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5850                         uint32_t const N = i->line->npoints ();
5851                         for (uint32_t j = 0; j < N; ++j) {
5852                                 i->points.push_back (i->line->nth (j));
5853                         }
5854                 }
5855
5856         }
5857
5858         if (_nothing_to_drag) {
5859                 return;
5860         }
5861 }
5862
5863 void
5864 AutomationRangeDrag::motion (GdkEvent*, bool first_move)
5865 {
5866         if (_nothing_to_drag && !first_move) {
5867                 return;
5868         }
5869
5870         if (first_move) {
5871                 _editor->begin_reversible_command (_("automation range move"));
5872
5873                 if (!_ranges.empty()) {
5874
5875                         for (list<AudioRange>::const_iterator i = _ranges.begin(); i != _ranges.end(); ++i) {
5876
5877                                 framecnt_t const half = (i->start + i->end) / 2;
5878
5879                                 /* find the line that this audio range starts in */
5880                                 list<Line>::iterator j = _lines.begin();
5881                                 while (j != _lines.end() && (j->range.first > i->start || j->range.second < i->start)) {
5882                                         ++j;
5883                                 }
5884
5885                                 if (j != _lines.end()) {
5886                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5887
5888                                 /* j is the line that this audio range starts in; fade into it;
5889                                    64 samples length plucked out of thin air.
5890                                 */
5891
5892                                         framepos_t a = i->start + 64;
5893                                         if (a > half) {
5894                                                 a = half;
5895                                         }
5896
5897                                         double const p = j->line->time_converter().from (i->start - j->line->time_converter().origin_b ());
5898                                         double const q = j->line->time_converter().from (a - j->line->time_converter().origin_b ());
5899
5900                                         XMLNode &before = the_list->get_state();
5901                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5902                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5903
5904                                         if (add_p || add_q) {
5905                                                 _editor->session()->add_command (
5906                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5907                                         }
5908                                 }
5909
5910                                 /* same thing for the end */
5911
5912                                 j = _lines.begin();
5913                                 while (j != _lines.end() && (j->range.first > i->end || j->range.second < i->end)) {
5914                                         ++j;
5915                                 }
5916
5917                                 if (j != _lines.end()) {
5918                                         boost::shared_ptr<AutomationList> the_list = j->line->the_list ();
5919
5920                                         /* j is the line that this audio range starts in; fade out of it;
5921                                            64 samples length plucked out of thin air.
5922                                         */
5923
5924                                         framepos_t b = i->end - 64;
5925                                         if (b < half) {
5926                                                 b = half;
5927                                         }
5928
5929                                         double const p = j->line->time_converter().from (b - j->line->time_converter().origin_b ());
5930                                         double const q = j->line->time_converter().from (i->end - j->line->time_converter().origin_b ());
5931
5932                                         XMLNode &before = the_list->get_state();
5933                                         bool const add_p = the_list->editor_add (p, value (the_list, p), false);
5934                                         bool const add_q = the_list->editor_add (q, value (the_list, q), false);
5935
5936                                         if (add_p || add_q) {
5937                                                 _editor->session()->add_command (
5938                                                         new MementoCommand<AutomationList>(*the_list.get (), &before, &the_list->get_state()));
5939                                         }
5940                                 }
5941                         }
5942
5943                         _nothing_to_drag = true;
5944
5945                         /* Find all the points that should be dragged and put them in the relevant
5946                            points lists in the Line structs.
5947                         */
5948
5949                         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5950
5951                                 uint32_t const N = i->line->npoints ();
5952                                 for (uint32_t j = 0; j < N; ++j) {
5953
5954                                         /* here's a control point on this line */
5955                                         ControlPoint* p = i->line->nth (j);
5956                                         double const w = i->line->time_converter().to ((*p->model())->when) + i->line->time_converter().origin_b ();
5957
5958                                         /* see if it's inside a range */
5959                                         list<AudioRange>::const_iterator k = _ranges.begin ();
5960                                         while (k != _ranges.end() && (k->start >= w || k->end <= w)) {
5961                                                 ++k;
5962                                         }
5963
5964                                         if (k != _ranges.end()) {
5965                                                 /* dragging this point */
5966                                                 _nothing_to_drag = false;
5967                                                 i->points.push_back (p);
5968                                         }
5969                                 }
5970                         }
5971                 }
5972
5973                 for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5974                         i->line->start_drag_multiple (i->points, y_fraction (i->line, current_pointer_y()), i->state);
5975                 }
5976         }
5977
5978         for (list<Line>::iterator l = _lines.begin(); l != _lines.end(); ++l) {
5979                 float const f = y_fraction (l->line, current_pointer_y());
5980                 /* we are ignoring x position for this drag, so we can just pass in anything */
5981                 pair<double, float> result;
5982                 uint32_t ignored;
5983                 result = l->line->drag_motion (0, f, true, false, ignored);
5984                 show_verbose_cursor_text (l->line->get_verbose_cursor_relative_string (l->original_fraction, result.second));
5985         }
5986 }
5987
5988 void
5989 AutomationRangeDrag::finished (GdkEvent* event, bool motion_occurred)
5990 {
5991         if (_nothing_to_drag || !motion_occurred) {
5992                 return;
5993         }
5994
5995         motion (event, false);
5996         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
5997                 i->line->end_drag (false, 0);
5998         }
5999
6000         _editor->commit_reversible_command ();
6001 }
6002
6003 void
6004 AutomationRangeDrag::aborted (bool)
6005 {
6006         for (list<Line>::iterator i = _lines.begin(); i != _lines.end(); ++i) {
6007                 i->line->reset ();
6008         }
6009 }
6010
6011 DraggingView::DraggingView (RegionView* v, RegionDrag* parent, TimeAxisView* itav)
6012         : view (v)
6013         , initial_time_axis_view (itav)
6014 {
6015         /* note that time_axis_view may be null if the regionview was created
6016          * as part of a copy operation.
6017          */
6018         time_axis_view = parent->find_time_axis_view (&v->get_time_axis_view ());
6019         layer = v->region()->layer ();
6020         initial_y = v->get_canvas_group()->position().y;
6021         initial_playlist = v->region()->playlist ();
6022         initial_position = v->region()->position ();
6023         initial_end = v->region()->position () + v->region()->length ();
6024 }
6025
6026 PatchChangeDrag::PatchChangeDrag (Editor* e, PatchChange* i, MidiRegionView* r)
6027         : Drag (e, i->canvas_item ())
6028         , _region_view (r)
6029         , _patch_change (i)
6030         , _cumulative_dx (0)
6031 {
6032         DEBUG_TRACE (DEBUG::Drags, string_compose ("New PatchChangeDrag, patch @ %1, grab @ %2\n",
6033                                                    _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time()),
6034                                                    grab_frame()));
6035 }
6036
6037 void
6038 PatchChangeDrag::motion (GdkEvent* ev, bool)
6039 {
6040         framepos_t f = adjusted_current_frame (ev);
6041         boost::shared_ptr<Region> r = _region_view->region ();
6042         f = max (f, r->position ());
6043         f = min (f, r->last_frame ());
6044
6045         framecnt_t const dxf = f - grab_frame(); // permitted dx in frames
6046         double const dxu = _editor->sample_to_pixel (dxf); // permitted fx in units
6047         _patch_change->move (ArdourCanvas::Duple (dxu - _cumulative_dx, 0));
6048         _cumulative_dx = dxu;
6049 }
6050
6051 void
6052 PatchChangeDrag::finished (GdkEvent* ev, bool movement_occurred)
6053 {
6054         if (!movement_occurred) {
6055                 return;
6056         }
6057
6058         boost::shared_ptr<Region> r (_region_view->region ());
6059         framepos_t f = adjusted_current_frame (ev);
6060         f = max (f, r->position ());
6061         f = min (f, r->last_frame ());
6062
6063         _region_view->move_patch_change (
6064                 *_patch_change,
6065                 _region_view->region_frames_to_region_beats (f - (r->position() - r->start()))
6066                 );
6067 }
6068
6069 void
6070 PatchChangeDrag::aborted (bool)
6071 {
6072         _patch_change->move (ArdourCanvas::Duple (-_cumulative_dx, 0));
6073 }
6074
6075 void
6076 PatchChangeDrag::setup_pointer_frame_offset ()
6077 {
6078         boost::shared_ptr<Region> region = _region_view->region ();
6079         _pointer_frame_offset = raw_grab_frame() - _region_view->source_beats_to_absolute_frames (_patch_change->patch()->time());
6080 }
6081
6082 MidiRubberbandSelectDrag::MidiRubberbandSelectDrag (Editor* e, MidiRegionView* rv)
6083         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6084         , _region_view (rv)
6085 {
6086
6087 }
6088
6089 void
6090 MidiRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool /*drag_in_progress*/)
6091 {
6092         _region_view->update_drag_selection (
6093                 x1, x2, y1, y2,
6094                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier));
6095 }
6096
6097 void
6098 MidiRubberbandSelectDrag::deselect_things ()
6099 {
6100         /* XXX */
6101 }
6102
6103 MidiVerticalSelectDrag::MidiVerticalSelectDrag (Editor* e, MidiRegionView* rv)
6104         : RubberbandSelectDrag (e, rv->get_canvas_group ())
6105         , _region_view (rv)
6106 {
6107         _vertical_only = true;
6108 }
6109
6110 void
6111 MidiVerticalSelectDrag::select_things (int button_state, framepos_t /*x1*/, framepos_t /*x2*/, double y1, double y2, bool /*drag_in_progress*/)
6112 {
6113         double const y = _region_view->midi_view()->y_position ();
6114
6115         y1 = max (0.0, y1 - y);
6116         y2 = max (0.0, y2 - y);
6117
6118         _region_view->update_vertical_drag_selection (
6119                 y1,
6120                 y2,
6121                 Keyboard::modifier_state_contains (button_state, Keyboard::TertiaryModifier)
6122                 );
6123 }
6124
6125 void
6126 MidiVerticalSelectDrag::deselect_things ()
6127 {
6128         /* XXX */
6129 }
6130
6131 EditorRubberbandSelectDrag::EditorRubberbandSelectDrag (Editor* e, ArdourCanvas::Item* i)
6132         : RubberbandSelectDrag (e, i)
6133 {
6134
6135 }
6136
6137 void
6138 EditorRubberbandSelectDrag::select_things (int button_state, framepos_t x1, framepos_t x2, double y1, double y2, bool drag_in_progress)
6139 {
6140         if (drag_in_progress) {
6141                 /* We just want to select things at the end of the drag, not during it */
6142                 return;
6143         }
6144
6145         Selection::Operation op = ArdourKeyboard::selection_type (button_state);
6146
6147         _editor->begin_reversible_selection_op (X_("rubberband selection"));
6148
6149         _editor->select_all_within (x1, x2 - 1, y1, y2, _editor->track_views, op, false);
6150
6151         _editor->commit_reversible_selection_op ();
6152 }
6153
6154 void
6155 EditorRubberbandSelectDrag::deselect_things ()
6156 {
6157         _editor->begin_reversible_selection_op (X_("Clear Selection (rubberband)"));
6158
6159         _editor->selection->clear_tracks();
6160         _editor->selection->clear_regions();
6161         _editor->selection->clear_points ();
6162         _editor->selection->clear_lines ();
6163         _editor->selection->clear_midi_notes ();
6164
6165         _editor->commit_reversible_selection_op();
6166 }
6167
6168 NoteCreateDrag::NoteCreateDrag (Editor* e, ArdourCanvas::Item* i, MidiRegionView* rv)
6169         : Drag (e, i)
6170         , _region_view (rv)
6171         , _drag_rect (0)
6172 {
6173         _note[0] = _note[1] = 0;
6174 }
6175
6176 NoteCreateDrag::~NoteCreateDrag ()
6177 {
6178         delete _drag_rect;
6179 }
6180
6181 framecnt_t
6182 NoteCreateDrag::grid_frames (framepos_t t) const
6183 {
6184         bool success;
6185         Evoral::Beats grid_beats = _editor->get_grid_type_as_beats (success, t);
6186         if (!success) {
6187                 grid_beats = Evoral::Beats(1);
6188         }
6189
6190         return _region_view->region_beats_to_region_frames (grid_beats);
6191 }
6192
6193 void
6194 NoteCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
6195 {
6196         Drag::start_grab (event, cursor);
6197
6198         _drag_rect = new ArdourCanvas::Rectangle (_region_view->get_canvas_group ());
6199
6200         framepos_t pf = _drags->current_pointer_frame ();
6201         framecnt_t const g = grid_frames (pf);
6202
6203         /* Hack so that we always snap to the note that we are over, instead of snapping
6204            to the next one if we're more than halfway through the one we're over.
6205         */
6206         if (_editor->snap_mode() == SnapNormal && pf > g / 2) {
6207                 pf -= g / 2;
6208         }
6209
6210         _note[0] = adjusted_frame (pf, event) - _region_view->region()->position ();
6211         _note[1] = _note[0];
6212
6213         MidiStreamView* sv = _region_view->midi_stream_view ();
6214         double const x = _editor->sample_to_pixel (_note[0]);
6215         double const y = sv->note_to_y (sv->y_to_note (y_to_region (event->button.y)));
6216
6217         _drag_rect->set (ArdourCanvas::Rect (x, y, x, y + floor (_region_view->midi_stream_view()->note_height ())));
6218         _drag_rect->set_outline_all ();
6219         _drag_rect->set_outline_color (0xffffff99);
6220         _drag_rect->set_fill_color (0xffffff66);
6221 }
6222
6223 void
6224 NoteCreateDrag::motion (GdkEvent* event, bool)
6225 {
6226         _note[1] = max ((framepos_t)0, adjusted_current_frame (event) - _region_view->region()->position ());
6227         double const x0 = _editor->sample_to_pixel (_note[0]);
6228         double const x1 = _editor->sample_to_pixel (_note[1]);
6229         _drag_rect->set_x0 (std::min(x0, x1));
6230         _drag_rect->set_x1 (std::max(x0, x1));
6231 }
6232
6233 void
6234 NoteCreateDrag::finished (GdkEvent*, bool had_movement)
6235 {
6236         if (!had_movement) {
6237                 return;
6238         }
6239
6240         framepos_t const start = min (_note[0], _note[1]);
6241         framecnt_t length = (framecnt_t) fabs ((double)(_note[0] - _note[1]));
6242
6243         framecnt_t const g = grid_frames (start);
6244         Evoral::Beats const one_tick = Evoral::Beats::ticks(1);
6245
6246         if (_editor->snap_mode() == SnapNormal && length < g) {
6247                 length = g;
6248         }
6249
6250         Evoral::Beats length_beats = max (
6251                 one_tick, _region_view->region_frames_to_region_beats (length) - one_tick);
6252
6253         _region_view->create_note_at (start, _drag_rect->y0(), length_beats, false);
6254 }
6255
6256 double
6257 NoteCreateDrag::y_to_region (double y) const
6258 {
6259         double x = 0;
6260         _region_view->get_canvas_group()->canvas_to_item (x, y);
6261         return y;
6262 }
6263
6264 void
6265 NoteCreateDrag::aborted (bool)
6266 {
6267
6268 }
6269
6270 CrossfadeEdgeDrag::CrossfadeEdgeDrag (Editor* e, AudioRegionView* rv, ArdourCanvas::Item* i, bool start_yn)
6271         : Drag (e, i)
6272         , arv (rv)
6273         , start (start_yn)
6274 {
6275         std::cout << ("CrossfadeEdgeDrag is DEPRECATED.  See TrimDrag::preserve_fade_anchor") << endl;
6276 }
6277
6278 void
6279 CrossfadeEdgeDrag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
6280 {
6281         Drag::start_grab (event, cursor);
6282 }
6283
6284 void
6285 CrossfadeEdgeDrag::motion (GdkEvent*, bool)
6286 {
6287         double distance;
6288         double new_length;
6289         framecnt_t len;
6290
6291         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6292
6293         if (start) {
6294                 distance = _drags->current_pointer_x() - grab_x();
6295                 len = ar->fade_in()->back()->when;
6296         } else {
6297                 distance = grab_x() - _drags->current_pointer_x();
6298                 len = ar->fade_out()->back()->when;
6299         }
6300
6301         /* how long should it be ? */
6302
6303         new_length = len + _editor->pixel_to_sample (distance);
6304
6305         /* now check with the region that this is legal */
6306
6307         new_length = ar->verify_xfade_bounds (new_length, start);
6308
6309         if (start) {
6310                 arv->reset_fade_in_shape_width (ar, new_length);
6311         } else {
6312                 arv->reset_fade_out_shape_width (ar, new_length);
6313         }
6314 }
6315
6316 void
6317 CrossfadeEdgeDrag::finished (GdkEvent*, bool)
6318 {
6319         double distance;
6320         double new_length;
6321         framecnt_t len;
6322
6323         boost::shared_ptr<AudioRegion> ar (arv->audio_region());
6324
6325         if (start) {
6326                 distance = _drags->current_pointer_x() - grab_x();
6327                 len = ar->fade_in()->back()->when;
6328         } else {
6329                 distance = grab_x() - _drags->current_pointer_x();
6330                 len = ar->fade_out()->back()->when;
6331         }
6332
6333         new_length = ar->verify_xfade_bounds (len + _editor->pixel_to_sample (distance), start);
6334
6335         _editor->begin_reversible_command ("xfade trim");
6336         ar->playlist()->clear_owned_changes ();
6337
6338         if (start) {
6339                 ar->set_fade_in_length (new_length);
6340         } else {
6341                 ar->set_fade_out_length (new_length);
6342         }
6343
6344         /* Adjusting the xfade may affect other regions in the playlist, so we need
6345            to get undo Commands from the whole playlist rather than just the
6346            region.
6347         */
6348
6349         vector<Command*> cmds;
6350         ar->playlist()->rdiff (cmds);
6351         _editor->session()->add_commands (cmds);
6352         _editor->commit_reversible_command ();
6353
6354 }
6355
6356 void
6357 CrossfadeEdgeDrag::aborted (bool)
6358 {
6359         if (start) {
6360                 // arv->redraw_start_xfade ();
6361         } else {
6362                 // arv->redraw_end_xfade ();
6363         }
6364 }
6365
6366 RegionCutDrag::RegionCutDrag (Editor* e, ArdourCanvas::Item* item, framepos_t pos)
6367         : Drag (e, item, true)
6368         , line (new EditorCursor (*e))
6369 {
6370         line->set_position (pos);
6371         line->show ();
6372 }
6373
6374 RegionCutDrag::~RegionCutDrag ()
6375 {
6376         delete line;
6377 }
6378
6379 void
6380 RegionCutDrag::motion (GdkEvent*, bool)
6381 {
6382         framepos_t where = _drags->current_pointer_frame();
6383         _editor->snap_to (where);
6384
6385         line->set_position (where);
6386 }
6387
6388 void
6389 RegionCutDrag::finished (GdkEvent*, bool)
6390 {
6391         _editor->get_track_canvas()->canvas()->re_enter();
6392
6393         framepos_t pos = _drags->current_pointer_frame();
6394
6395         line->hide ();
6396
6397         RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
6398
6399         if (rs.empty()) {
6400                 return;
6401         }
6402
6403         _editor->split_regions_at (pos, rs);
6404 }
6405
6406 void
6407 RegionCutDrag::aborted (bool)
6408 {
6409 }