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 #define __STDC_LIMIT_MACROS 1
  21 #include <stdint.h>
  22 #include "pbd/memento_command.h"
  23 #include "pbd/basename.h"
  24 #include "pbd/stateful_diff_command.h"
  25 #include "ardour/session.h"
  26 #include "ardour/dB.h"
  27 #include "ardour/region_factory.h"
  28 #include "editor.h"
  29 #include "i18n.h"
  30 #include "keyboard.h"
  31 #include "audio_region_view.h"
  32 #include "midi_region_view.h"
  33 #include "ardour_ui.h"
  34 #include "gui_thread.h"
  35 #include "control_point.h"
  36 #include "utils.h"
  37 #include "region_gain_line.h"
  38 #include "editor_drag.h"
  39 #include "audio_time_axis.h"
  40 #include "midi_time_axis.h"
  41 #include "canvas-note.h"
  42 #include "selection.h"
  43 #include "midi_selection.h"
  44 #include "automation_time_axis.h"
  45
  46 using namespace std;
  47 using namespace ARDOUR;
  48 using namespace PBD;
  49 using namespace Gtk;
  50 using namespace Editing;
  51 using namespace ArdourCanvas;
  52
  53 using Gtkmm2ext::Keyboard;
  54
  55 double const ControlPointDrag::_zero_gain_fraction = gain_to_slider_position (dB_to_coefficient (0.0));
  56
  57 DragManager::DragManager (Editor* e)
  58         : _editor (e)
  59         , _ending (false)
  60         , _current_pointer_frame (0)
  61 {
  62
  63 }
  64
  65 DragManager::~DragManager ()
  66 {
  67         abort ();
  68 }
  69
  70 /** Call abort for each active drag */
  71 void
  72 DragManager::abort ()
  73 {
  74         _ending = true;
  75
  76         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
  77                 (*i)->abort ();
  78                 delete *i;
  79         }
  80
  81         _drags.clear ();
  82
  83         _ending = false;
  84 }
  85
  86 void
  87 DragManager::add (Drag* d)
  88 {
  89         d->set_manager (this);
  90         _drags.push_back (d);
  91 }
  92
  93 void
  94 DragManager::set (Drag* d, GdkEvent* e, Gdk::Cursor* c)
  95 {
  96         assert (_drags.empty ());
  97         d->set_manager (this);
  98         _drags.push_back (d);
  99         start_grab (e);
 100 }
 101
 102 void
 103 DragManager::start_grab (GdkEvent* e)
 104 {
 105         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
 106
 107         for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
 108                 (*i)->start_grab (e);
 109         }
 110 }
 111
 112 /** Call end_grab for each active drag.
 113  *  @return true if any drag reported movement having occurred.
 114  */
 115 bool
 116 DragManager::end_grab (GdkEvent* e)
 117 {
 118         _ending = true;
 119
 120         bool r = false;
 121         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 122                 bool const t = (*i)->end_grab (e);
 123                 if (t) {
 124                         r = true;
 125                 }
 126                 delete *i;
 127         }
 128
 129         _drags.clear ();
 130
 131         _ending = false;
 132
 133         return r;
 134 }
 135
 136 bool
 137 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 138 {
 139         bool r = false;
 140
 141         _current_pointer_frame = _editor->event_frame (e, &_current_pointer_x, &_current_pointer_y);
 142
 143         for (list<Drag*>::iterator i = _drags.begin(); i != _drags.end(); ++i) {
 144                 bool const t = (*i)->motion_handler (e, from_autoscroll);
 145                 if (t) {
 146                         r = true;
 147                 }
 148
 149         }
 150
 151         return r;
 152 }
 153
 154 bool
 155 DragManager::have_item (ArdourCanvas::Item* i) const
 156 {
 157         list<Drag*>::const_iterator j = _drags.begin ();
 158         while (j != _drags.end() && (*j)->item () != i) {
 159                 ++j;
 160         }
 161
 162         return j != _drags.end ();
 163 }
 164
 165 Drag::Drag (Editor* e, ArdourCanvas::Item* i)
 166         : _editor (e)
 167         , _item (i)
 168         , _pointer_frame_offset (0)
 169         , _move_threshold_passed (false)
 170         , _grab_frame (0)
 171         , _last_pointer_frame (0)
 172 {
 173
 174 }
 175
 176 void
 177 Drag::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t time)
 178 {
 179         _item->ungrab (0);
 180         _item = new_item;
 181
 182         if (cursor == 0) {
 183                 cursor = _editor->which_grabber_cursor ();
 184         }
 185
 186         _item->grab (Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK, *cursor, time);
 187 }
 188
 189 void
 190 Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
 191 {
 192         if (cursor == 0) {
 193                 cursor = _editor->which_grabber_cursor ();
 194         }
 195
 196         // if dragging with button2, the motion is x constrained, with Alt-button2 it is y constrained
 197
 198         if (Keyboard::is_button2_event (&event->button)) {
 199                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::SecondaryModifier)) {
 200                         _y_constrained = true;
 201                         _x_constrained = false;
 202                 } else {
 203                         _y_constrained = false;
 204                         _x_constrained = true;
 205                 }
 206         } else {
 207                 _x_constrained = false;
 208                 _y_constrained = false;
 209         }
 210
 211         _grab_frame = _editor->event_frame (event, &_grab_x, &_grab_y);
 212         _grab_frame = adjusted_frame (_grab_frame, event);
 213         _last_pointer_frame = _grab_frame;
 214         _last_pointer_x = _grab_x;
 215         _last_pointer_y = _grab_y;
 216
 217         _item->grab (Gdk::POINTER_MOTION_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK,
 218                      *cursor,
 219                      event->button.time);
 220
 221         if (_editor->session() && _editor->session()->transport_rolling()) {
 222                 _was_rolling = true;
 223         } else {
 224                 _was_rolling = false;
 225         }
 226
 227         switch (_editor->snap_type()) {
 228         case SnapToRegionStart:
 229         case SnapToRegionEnd:
 230         case SnapToRegionSync:
 231         case SnapToRegionBoundary:
 232                 _editor->build_region_boundary_cache ();
 233                 break;
 234         default:
 235                 break;
 236         }
 237 }
 238
 239 /** Call to end a drag `successfully'.  Ungrabs item and calls
 240  *  subclass' finished() method.
 241  *
 242  *  @param event GDK event, or 0.
 243  *  @return true if some movement occurred, otherwise false.
 244  */
 245 bool
 246 Drag::end_grab (GdkEvent* event)
 247 {
 248         _editor->stop_canvas_autoscroll ();
 249
 250         _item->ungrab (event ? event->button.time : 0);
 251
 252         finished (event, _move_threshold_passed);
 253
 254         _editor->hide_verbose_canvas_cursor();
 255
 256         return _move_threshold_passed;
 257 }
 258
 259 nframes64_t
 260 Drag::adjusted_frame (nframes64_t f, GdkEvent const * event, bool snap) const
 261 {
 262         nframes64_t pos = 0;
 263
 264         if (f > _pointer_frame_offset) {
 265                 pos = f - _pointer_frame_offset;
 266         }
 267
 268         if (snap) {
 269                 _editor->snap_to_with_modifier (pos, event);
 270         }
 271
 272         return pos;
 273 }
 274
 275 nframes64_t
 276 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 277 {
 278         return adjusted_frame (_drags->current_pointer_frame (), event, snap);
 279 }
 280
 281 bool
 282 Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 283 {
 284         /* check to see if we have moved in any way that matters since the last motion event */
 285         if ( (!x_movement_matters() || _last_pointer_frame == adjusted_current_frame (event)) &&
 286              (!y_movement_matters() || _last_pointer_y == _drags->current_pointer_y ()) ) {
 287                 return false;
 288         }
 289
 290         pair<nframes64_t, int> const threshold = move_threshold ();
 291
 292         bool const old_move_threshold_passed = _move_threshold_passed;
 293
 294         if (!from_autoscroll && !_move_threshold_passed) {
 295
 296                 bool const xp = (::llabs (adjusted_current_frame (event) - _grab_frame) >= threshold.first);
 297                 bool const yp = (::fabs ((_drags->current_pointer_y () - _grab_y)) >= threshold.second);
 298
 299                 _move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 300         }
 301
 302         if (active (_editor->mouse_mode) && _move_threshold_passed) {
 303
 304                 if (event->motion.state & Gdk::BUTTON1_MASK || event->motion.state & Gdk::BUTTON2_MASK) {
 305                         if (!from_autoscroll) {
 306                                 _editor->maybe_autoscroll (true, allow_vertical_autoscroll ());
 307                         }
 308
 309                         motion (event, _move_threshold_passed != old_move_threshold_passed);
 310
 311                         _last_pointer_x = _drags->current_pointer_x ();
 312                         _last_pointer_y = _drags->current_pointer_y ();
 313                         _last_pointer_frame = adjusted_current_frame (event);
 314
 315                         return true;
 316                 }
 317         }
 318         return false;
 319 }
 320
 321 /** Call to abort a drag.  Ungrabs item and calls subclass's aborted () */
 322 void
 323 Drag::abort ()
 324 {
 325         if (_item) {
 326                 _item->ungrab (0);
 327         }
 328
 329         aborted ();
 330
 331         _editor->stop_canvas_autoscroll ();
 332         _editor->hide_verbose_canvas_cursor ();
 333 }
 334
 335 RegionDrag::RegionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
 336         : Drag (e, i),
 337           _primary (p)
 338 {
 339         for (list<RegionView*>::const_iterator i = v.begin(); i != v.end(); ++i) {
 340                 _views.push_back (DraggingView (*i));
 341         }
 342
 343         RegionView::RegionViewGoingAway.connect (death_connection, invalidator (*this), ui_bind (&RegionDrag::region_going_away, this, _1), gui_context());
 344 }
 345
 346 void
 347 RegionDrag::region_going_away (RegionView* v)
 348 {
 349         list<DraggingView>::iterator i = _views.begin ();
 350         while (i != _views.end() && i->view != v) {
 351                 ++i;
 352         }
 353
 354         if (i != _views.end()) {
 355                 _views.erase (i);
 356         }
 357 }
 358
 359 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
 360         : RegionDrag (e, i, p, v),
 361           _dest_trackview (0),
 362           _dest_layer (0),
 363           _brushing (b),
 364           _total_x_delta (0)
 365 {
 366
 367 }
 368
 369
 370 void
 371 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
 372 {
 373         Drag::start_grab (event);
 374
 375         _editor->show_verbose_time_cursor (_last_frame_position, 10);
 376 }
 377
 378 RegionMotionDrag::TimeAxisViewSummary
 379 RegionMotionDrag::get_time_axis_view_summary ()
 380 {
 381         int32_t children = 0;
 382         TimeAxisViewSummary sum;
 383
 384         _editor->visible_order_range (&sum.visible_y_low, &sum.visible_y_high);
 385
 386         /* get a bitmask representing the visible tracks */
 387
 388         for (TrackViewList::iterator i = _editor->track_views.begin(); i != _editor->track_views.end(); ++i) {
 389                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (*i);
 390                 TimeAxisView::Children children_list;
 391
 392                 /* zeroes are audio/MIDI tracks. ones are other types. */
 393
 394                 if (!rtv->hidden()) {
 395
 396                         if (!rtv->is_track()) {
 397                                 /* not an audio nor MIDI track */
 398                                 sum.tracks = sum.tracks |= (0x01 << rtv->order());
 399                         }
 400
 401                         sum.height_list[rtv->order()] = (*i)->current_height();
 402                         children = 1;
 403
 404                         if ((children_list = rtv->get_child_list()).size() > 0) {
 405                                 for (TimeAxisView::Children::iterator j = children_list.begin(); j != children_list.end(); ++j) {
 406                                         sum.tracks = sum.tracks |= (0x01 << (rtv->order() + children));
 407                                         sum.height_list[rtv->order() + children] = (*j)->current_height();
 408                                         children++;
 409                                 }
 410                         }
 411                 }
 412         }
 413
 414         return sum;
 415 }
 416
 417 bool
 418 RegionMotionDrag::compute_y_delta (
 419         TimeAxisView const * last_pointer_view, TimeAxisView* current_pointer_view,
 420         int32_t last_pointer_layer, int32_t current_pointer_layer,
 421         TimeAxisViewSummary const & tavs,
 422         int32_t* pointer_order_span, int32_t* pointer_layer_span,
 423         int32_t* canvas_pointer_order_span
 424         )
 425 {
 426         if (_brushing) {
 427                 *pointer_order_span = 0;
 428                 *pointer_layer_span = 0;
 429                 return true;
 430         }
 431
 432         bool clamp_y_axis = false;
 433
 434         /* the change in track order between this callback and the last */
 435         *pointer_order_span = last_pointer_view->order() - current_pointer_view->order();
 436         /* the change in layer between this callback and the last;
 437            only meaningful if pointer_order_span == 0 (ie we've not moved tracks) */
 438         *pointer_layer_span = last_pointer_layer - current_pointer_layer;
 439
 440         if (*pointer_order_span != 0) {
 441
 442                 /* find the actual pointer span, in terms of the number of visible tracks;
 443                    to do this, we reduce |pointer_order_span| by the number of hidden tracks
 444                    over the span */
 445
 446                 *canvas_pointer_order_span = *pointer_order_span;
 447                 if (last_pointer_view->order() >= current_pointer_view->order()) {
 448                         for (int32_t y = current_pointer_view->order(); y < last_pointer_view->order(); y++) {
 449                                 if (tavs.height_list[y] == 0) {
 450                                         *canvas_pointer_order_span--;
 451                                 }
 452                         }
 453                 } else {
 454                         for (int32_t y = last_pointer_view->order(); y <= current_pointer_view->order(); y++) {
 455                                 if (tavs.height_list[y] == 0) {
 456                                         *canvas_pointer_order_span++;
 457                                 }
 458                         }
 459                 }
 460
 461                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 462
 463                         RegionView* rv = i->view;
 464
 465                         if (rv->region()->locked()) {
 466                                 continue;
 467                         }
 468
 469                         double ix1, ix2, iy1, iy2;
 470                         rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
 471                         rv->get_canvas_frame()->i2w (ix1, iy1);
 472                         iy1 += _editor->vertical_adjustment.get_value() - _editor->canvas_timebars_vsize;
 473
 474                         /* get the new trackview for this particular region */
 475                         pair<TimeAxisView*, int> const tvp = _editor->trackview_by_y_position (iy1);
 476                         assert (tvp.first);
 477                         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
 478
 479                         /* XXX: not sure that we should be passing canvas_pointer_order_span in here,
 480                            as surely this is a per-region thing... */
 481
 482                         clamp_y_axis = y_movement_disallowed (
 483                                 rtv->order(), last_pointer_view->order(), *canvas_pointer_order_span, tavs
 484                                 );
 485
 486                         if (clamp_y_axis) {
 487                                 break;
 488                         }
 489                 }
 490
 491         } else if (_dest_trackview == current_pointer_view) {
 492
 493                 if (current_pointer_layer == last_pointer_layer) {
 494                         /* No movement; clamp */
 495                         clamp_y_axis = true;
 496                 }
 497         }
 498
 499         if (!clamp_y_axis) {
 500                 _dest_trackview = current_pointer_view;
 501                 _dest_layer = current_pointer_layer;
 502         }
 503
 504         return clamp_y_axis;
 505 }
 506
 507
 508 double
 509 RegionMotionDrag::compute_x_delta (GdkEvent const * event, nframes64_t* pending_region_position)
 510 {
 511         /* compute the amount of pointer motion in frames, and where
 512            the region would be if we moved it by that much.
 513         */
 514         *pending_region_position = adjusted_current_frame (event);
 515
 516         nframes64_t sync_frame;
 517         nframes64_t sync_offset;
 518         int32_t sync_dir;
 519
 520         sync_offset = _primary->region()->sync_offset (sync_dir);
 521
 522         /* we don't handle a sync point that lies before zero.
 523          */
 524         if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
 525
 526                 sync_frame = *pending_region_position + (sync_dir*sync_offset);
 527
 528                 _editor->snap_to_with_modifier (sync_frame, event);
 529
 530                 *pending_region_position = _primary->region()->adjust_to_sync (sync_frame);
 531
 532         } else {
 533                 *pending_region_position = _last_frame_position;
 534         }
 535
 536         if (*pending_region_position > max_frames - _primary->region()->length()) {
 537                 *pending_region_position = _last_frame_position;
 538         }
 539
 540         double x_delta = 0;
 541
 542         if ((*pending_region_position != _last_frame_position) && x_move_allowed ()) {
 543
 544                 /* now compute the canvas unit distance we need to move the regionview
 545                    to make it appear at the new location.
 546                 */
 547
 548                 x_delta = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->frames_per_unit;
 549
 550                 if (*pending_region_position <= _last_frame_position) {
 551
 552                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 553
 554                                 RegionView* rv = i->view;
 555
 556                                 // If any regionview is at zero, we need to know so we can stop further leftward motion.
 557
 558                                 double ix1, ix2, iy1, iy2;
 559                                 rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
 560                                 rv->get_canvas_frame()->i2w (ix1, iy1);
 561
 562                                 if (-x_delta > ix1 + _editor->horizontal_position()) {
 563                                         x_delta = 0;
 564                                         *pending_region_position = _last_frame_position;
 565                                         break;
 566                                 }
 567                         }
 568
 569                 }
 570
 571                 _last_frame_position = *pending_region_position;
 572         }
 573
 574         return x_delta;
 575 }
 576
 577 void
 578 RegionMotionDrag::motion (GdkEvent* event, bool first_move)
 579 {
 580         double y_delta = 0;
 581
 582         TimeAxisViewSummary tavs = get_time_axis_view_summary ();
 583
 584         vector<int32_t>::iterator j;
 585
 586         /* *pointer* variables reflect things about the pointer; as we may be moving
 587            multiple regions, much detail must be computed per-region */
 588
 589         /* current_pointer_view will become the TimeAxisView that we're currently pointing at, and
 590            current_pointer_layer the current layer on that TimeAxisView; in this code layer numbers
 591            are with respect to how the view's layers are displayed; if we are in Overlaid mode, layer
 592            is always 0 regardless of what the region's "real" layer is */
 593         RouteTimeAxisView* current_pointer_view;
 594         layer_t current_pointer_layer;
 595         if (!check_possible (&current_pointer_view, &current_pointer_layer)) {
 596                 return;
 597         }
 598
 599         /* TimeAxisView that we were pointing at last time we entered this method */
 600         TimeAxisView const * const last_pointer_view = _dest_trackview;
 601         /* the order of the track that we were pointing at last time we entered this method */
 602         int32_t const last_pointer_order = last_pointer_view->order ();
 603         /* the layer that we were pointing at last time we entered this method */
 604         layer_t const last_pointer_layer = _dest_layer;
 605
 606         int32_t pointer_order_span;
 607         int32_t pointer_layer_span;
 608         int32_t canvas_pointer_order_span;
 609
 610         bool const clamp_y_axis = compute_y_delta (
 611                 last_pointer_view, current_pointer_view,
 612                 last_pointer_layer, current_pointer_layer, tavs,
 613                 &pointer_order_span, &pointer_layer_span,
 614                 &canvas_pointer_order_span
 615                 );
 616
 617         nframes64_t pending_region_position;
 618         double const x_delta = compute_x_delta (event, &pending_region_position);
 619
 620         /*************************************************************
 621             PREPARE TO MOVE
 622         ************************************************************/
 623
 624         if (x_delta == 0 && pointer_order_span == 0 && pointer_layer_span == 0 && !first_move) {
 625                 /* haven't reached next snap point, and we're not switching
 626                    trackviews nor layers. nothing to do.
 627                 */
 628                 return;
 629         }
 630
 631         /*************************************************************
 632             MOTION
 633         ************************************************************/
 634
 635         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
 636
 637         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 638
 639                 RegionView* rv = i->view;
 640
 641                 if (rv->region()->locked()) {
 642                         continue;
 643                 }
 644
 645                 /* here we are calculating the y distance from the
 646                    top of the first track view to the top of the region
 647                    area of the track view that we're working on */
 648
 649                 /* this x value is just a dummy value so that we have something
 650                    to pass to i2w () */
 651
 652                 double ix1 = 0;
 653
 654                 /* distance from the top of this track view to the region area
 655                    of our track view is always 1 */
 656
 657                 double iy1 = 1;
 658
 659                 /* convert to world coordinates, ie distance from the top of
 660                    the ruler section */
 661
 662                 rv->get_canvas_frame()->i2w (ix1, iy1);
 663
 664                 /* compensate for the ruler section and the vertical scrollbar position */
 665                 iy1 += _editor->get_trackview_group_vertical_offset ();
 666
 667                 if (first_move) {
 668
 669                         // hide any dependent views
 670
 671                         rv->get_time_axis_view().hide_dependent_views (*rv);
 672
 673                         /*
 674                            reparent to a non scrolling group so that we can keep the
 675                            region selection above all time axis views.
 676                            reparenting means we have to move the rv as the two
 677                            parent groups have different coordinates.
 678                         */
 679
 680                         rv->get_canvas_group()->property_y() = iy1 - 1;
 681                         rv->get_canvas_group()->reparent(*(_editor->_region_motion_group));
 682
 683                         rv->fake_set_opaque (true);
 684                 }
 685
 686                 /* current view for this particular region */
 687                 pair<TimeAxisView*, int> pos = _editor->trackview_by_y_position (iy1);
 688                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (pos.first);
 689
 690                 if (pointer_order_span != 0 && !clamp_y_axis) {
 691
 692                         /* INTER-TRACK MOVEMENT */
 693
 694                         /* move through the height list to the track that the region is currently on */
 695                         vector<int32_t>::iterator j = tavs.height_list.begin ();
 696                         int32_t x = 0;
 697                         while (j != tavs.height_list.end () && x != rtv->order ()) {
 698                                 ++x;
 699                                 ++j;
 700                         }
 701
 702                         y_delta = 0;
 703                         int32_t temp_pointer_order_span = canvas_pointer_order_span;
 704
 705                         if (j != tavs.height_list.end ()) {
 706
 707                                 /* Account for layers in the original and
 708                                    destination tracks.  If we're moving around in layers we assume
 709                                    that only one track is involved, so it's ok to use *pointer*
 710                                    variables here. */
 711
 712                                 StreamView* lv = last_pointer_view->view ();
 713                                 assert (lv);
 714
 715                                 /* move to the top of the last trackview */
 716                                 if (lv->layer_display () == Stacked) {
 717                                         y_delta -= (lv->layers() - last_pointer_layer - 1) * lv->child_height ();
 718                                 }
 719
 720                                 StreamView* cv = current_pointer_view->view ();
 721                                 assert (cv);
 722
 723                                 /* move to the right layer on the current trackview */
 724                                 if (cv->layer_display () == Stacked) {
 725                                         y_delta += (cv->layers() - current_pointer_layer - 1) * cv->child_height ();
 726                                 }
 727
 728                                 /* And for being on a non-topmost layer on the new
 729                                    track */
 730
 731                                 while (temp_pointer_order_span > 0) {
 732                                         /* we're moving up canvas-wise,
 733                                            so we need to find the next track height
 734                                         */
 735                                         if (j != tavs.height_list.begin()) {
 736                                                 j--;
 737                                         }
 738
 739                                         if (x != last_pointer_order) {
 740                                                 if ((*j) == 0) {
 741                                                         ++temp_pointer_order_span;
 742                                                 }
 743                                         }
 744
 745                                         y_delta -= (*j);
 746                                         temp_pointer_order_span--;
 747                                 }
 748
 749                                 while (temp_pointer_order_span < 0) {
 750
 751                                         y_delta += (*j);
 752
 753                                         if (x != last_pointer_order) {
 754                                                 if ((*j) == 0) {
 755                                                         --temp_pointer_order_span;
 756                                                 }
 757                                         }
 758
 759                                         if (j != tavs.height_list.end()) {
 760                                                 j++;
 761                                         }
 762
 763                                         temp_pointer_order_span++;
 764                                 }
 765
 766
 767                                 /* find out where we'll be when we move and set height accordingly */
 768
 769                                 pair<TimeAxisView*, int> const pos = _editor->trackview_by_y_position (iy1 + y_delta);
 770                                 RouteTimeAxisView const * temp_rtv = dynamic_cast<RouteTimeAxisView*> (pos.first);
 771                                 rv->set_height (temp_rtv->view()->child_height());
 772
 773                                 /* if you un-comment the following, the region colours will follow
 774                                    the track colours whilst dragging; personally
 775                                    i think this can confuse things, but never mind.
 776                                 */
 777
 778                                 //const GdkColor& col (temp_rtv->view->get_region_color());
 779                                 //rv->set_color (const_cast<GdkColor&>(col));
 780                         }
 781                 }
 782
 783                 if (pointer_order_span == 0 && pointer_layer_span != 0 && !clamp_y_axis) {
 784
 785                         /* INTER-LAYER MOVEMENT in the same track */
 786                         y_delta = rtv->view()->child_height () * pointer_layer_span;
 787                 }
 788
 789
 790                 if (_brushing) {
 791                         _editor->mouse_brush_insert_region (rv, pending_region_position);
 792                 } else {
 793                         rv->move (x_delta, y_delta);
 794                 }
 795
 796         } /* foreach region */
 797
 798         _total_x_delta += x_delta;
 799
 800         if (first_move) {
 801                 _editor->cursor_group->raise_to_top();
 802         }
 803
 804         if (x_delta != 0 && !_brushing) {
 805                 _editor->show_verbose_time_cursor (_last_frame_position, 10);
 806         }
 807 }
 808
 809 void
 810 RegionMoveDrag::motion (GdkEvent* event, bool first_move)
 811 {
 812         if (_copy && first_move) {
 813                 copy_regions (event);
 814         }
 815
 816         RegionMotionDrag::motion (event, first_move);
 817 }
 818
 819 void
 820 RegionMoveDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
 821 {
 822         vector<RegionView*> copies;
 823         boost::shared_ptr<Track> tr;
 824         boost::shared_ptr<Playlist> from_playlist;
 825         boost::shared_ptr<Playlist> to_playlist;
 826         RegionSelection new_views;
 827         typedef set<boost::shared_ptr<Playlist> > PlaylistSet;
 828         PlaylistSet modified_playlists;
 829         PlaylistSet frozen_playlists;
 830         list <sigc::connection> modified_playlist_connections;
 831         pair<PlaylistSet::iterator,bool> insert_result, frozen_insert_result;
 832         nframes64_t drag_delta;
 833         bool changed_tracks, changed_position;
 834         map<RegionView*, pair<RouteTimeAxisView*, int> > final;
 835         RouteTimeAxisView* source_tv;
 836         vector<StatefulDiffCommand*> sdc;
 837
 838         if (!movement_occurred) {
 839                 /* just a click */
 840                 return;
 841         }
 842
 843         if (_brushing) {
 844                 /* all changes were made during motion event handlers */
 845
 846                 if (_copy) {
 847                         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
 848                                 copies.push_back (i->view);
 849                         }
 850                 }
 851
 852                 goto out;
 853         }
 854
 855         /* reverse this here so that we have the correct logic to finalize
 856            the drag.
 857         */
 858
 859         if (Config->get_edit_mode() == Lock) {
 860                 _x_constrained = !_x_constrained;
 861         }
 862
 863         if (_copy) {
 864                 if (_x_constrained) {
 865                         _editor->begin_reversible_command (_("fixed time region copy"));
 866                 } else {
 867                         _editor->begin_reversible_command (_("region copy"));
 868                 }
 869         } else {
 870                 if (_x_constrained) {
 871                         _editor->begin_reversible_command (_("fixed time region drag"));
 872                 } else {
 873                         _editor->begin_reversible_command (_("region drag"));
 874                 }
 875         }
 876
 877         changed_position = (_last_frame_position != (nframes64_t) (_primary->region()->position()));
 878         changed_tracks = (_dest_trackview != &_primary->get_time_axis_view());
 879
 880         drag_delta = _primary->region()->position() - _last_frame_position;
 881
 882         _editor->update_canvas_now ();
 883
 884         /* make a list of where each region ended up */
 885         final = find_time_axis_views_and_layers ();
 886
 887         cerr << "Iterate over " << _views.size() << " views\n";
 888
 889         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
 890
 891                 RegionView* rv = i->view;
 892                 RouteTimeAxisView* dest_rtv = final[rv].first;
 893                 layer_t dest_layer = final[rv].second;
 894
 895                 nframes64_t where;
 896
 897                 from_playlist.reset ();
 898                 to_playlist.reset ();
 899
 900                 if (rv->region()->locked()) {
 901                         ++i;
 902                         continue;
 903                 }
 904
 905                 if (changed_position && !_x_constrained) {
 906                         where = rv->region()->position() - drag_delta;
 907                 } else {
 908                         where = rv->region()->position();
 909                 }
 910
 911                 boost::shared_ptr<Region> new_region;
 912
 913                 if (_copy) {
 914                         /* we already made a copy */
 915                         new_region = rv->region();
 916
 917                         /* undo the previous hide_dependent_views so that xfades don't
 918                            disappear on copying regions
 919                         */
 920
 921                         //rv->get_time_axis_view().reveal_dependent_views (*rv);
 922
 923                 } else if (changed_tracks && dest_rtv->playlist()) {
 924                         new_region = RegionFactory::create (rv->region());
 925                 }
 926
 927                 if (changed_tracks || _copy) {
 928
 929                         to_playlist = dest_rtv->playlist();
 930
 931                         if (!to_playlist) {
 932                                 ++i;
 933                                 continue;
 934                         }
 935
 936                         _editor->latest_regionviews.clear ();
 937
 938                         sigc::connection c = dest_rtv->view()->RegionViewAdded.connect (sigc::mem_fun(*_editor, &Editor::collect_new_region_view));
 939
 940                         insert_result = modified_playlists.insert (to_playlist);
 941
 942                         if (insert_result.second) {
 943                                 to_playlist->clear_history ();
 944                         }
 945
 946                         cerr << "To playlist " << to_playlist->name() << " region history contains "
 947                              << to_playlist->region_list().change().added.size() << " adds and "
 948                              << to_playlist->region_list().change().removed.size() << " removes\n";
 949
 950                         cerr << "Adding new region " << new_region->id() << " based on "
 951                              << rv->region()->id() << endl;
 952
 953                         to_playlist->add_region (new_region, where);
 954
 955                         if (dest_rtv->view()->layer_display() == Stacked) {
 956                                 new_region->set_layer (dest_layer);
 957                                 new_region->set_pending_explicit_relayer (true);
 958                         }
 959
 960                         c.disconnect ();
 961
 962                         if (!_editor->latest_regionviews.empty()) {
 963                                 // XXX why just the first one ? we only expect one
 964                                 // commented out in nick_m's canvas reworking. is that intended?
 965                                 //dest_atv->reveal_dependent_views (*latest_regionviews.front());
 966                                 new_views.push_back (_editor->latest_regionviews.front());
 967                         }
 968
 969                 } else {
 970                         rv->region()->clear_history ();
 971
 972                         /*
 973                            motion on the same track. plonk the previously reparented region
 974                            back to its original canvas group (its streamview).
 975                            No need to do anything for copies as they are fake regions which will be deleted.
 976                         */
 977
 978                         rv->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
 979                         rv->get_canvas_group()->property_y() = i->initial_y;
 980                         rv->get_time_axis_view().reveal_dependent_views (*rv);
 981
 982                         /* just change the model */
 983
 984                         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
 985
 986                         if (dest_rtv->view()->layer_display() == Stacked) {
 987                                 rv->region()->set_layer (dest_layer);
 988                                 rv->region()->set_pending_explicit_relayer (true);
 989                         }
 990
 991                         /* freeze playlist to avoid lots of relayering in the case of a multi-region drag */
 992
 993                         frozen_insert_result = frozen_playlists.insert(playlist);
 994
 995                         if (frozen_insert_result.second) {
 996                                 playlist->freeze();
 997                         }
 998
 999                         cerr << "Moving region " << rv->region()->id() << endl;
1000
1001                         rv->region()->set_position (where, (void*) this);
1002
1003                         sdc.push_back (new StatefulDiffCommand (rv->region()));
1004                 }
1005
1006                 if (changed_tracks && !_copy) {
1007
1008                         /* get the playlist where this drag started. we can't use rv->region()->playlist()
1009                            because we may have copied the region and it has not been attached to a playlist.
1010                         */
1011
1012                         source_tv = dynamic_cast<RouteTimeAxisView*> (&rv->get_time_axis_view());
1013                         tr = source_tv->track();
1014                         from_playlist = tr->playlist();
1015
1016                         assert (source_tv);
1017                         assert (tr);
1018                         assert (from_playlist);
1019
1020                         /* moved to a different audio track, without copying */
1021
1022                         /* the region that used to be in the old playlist is not
1023                            moved to the new one - we use a copy of it. as a result,
1024                            any existing editor for the region should no longer be
1025                            visible.
1026                         */
1027
1028                         rv->hide_region_editor();
1029                         rv->fake_set_opaque (false);
1030
1031                         /* remove the region from the old playlist */
1032
1033                         insert_result = modified_playlists.insert (from_playlist);
1034
1035                         if (insert_result.second) {
1036                                 from_playlist->clear_history ();
1037                         }
1038
1039                         cerr << "From playlist " << from_playlist->name() << " region history contains "
1040                              << from_playlist->region_list().change().added.size() << " adds and "
1041                              << from_playlist->region_list().change().removed.size() << " removes\n";
1042
1043                         cerr << "removing region " << rv->region() << endl;
1044
1045                         from_playlist->remove_region (rv->region());
1046
1047                         /* OK, this is where it gets tricky. If the playlist was being used by >1 tracks, and the region
1048                            was selected in all of them, then removing it from a playlist will have removed all
1049                            trace of it from the selection (i.e. there were N regions selected, we removed 1,
1050                            but since its the same playlist for N tracks, all N tracks updated themselves, removed the
1051                            corresponding regionview, and the selection is now empty).
1052
1053                            this could have invalidated any and all iterators into the region selection.
1054
1055                            the heuristic we use here is: if the region selection is empty, break out of the loop
1056                            here. if the region selection is not empty, then restart the loop because we know that
1057                            we must have removed at least the region(view) we've just been working on as well as any
1058                            that we processed on previous iterations.
1059
1060                            EXCEPT .... if we are doing a copy drag, then the selection hasn't been modified and
1061                            we can just iterate.
1062                         */
1063
1064                         if (_views.empty()) {
1065                                 if (to_playlist) {
1066                                         sdc.push_back (new StatefulDiffCommand (to_playlist));
1067                                         cerr << "Saved diff for to:" << to_playlist->name() << endl;
1068                                 }
1069
1070                                 if (from_playlist && (from_playlist != to_playlist)) {
1071                                         sdc.push_back (new StatefulDiffCommand (from_playlist));
1072                                         cerr << "Saved diff for from:" << from_playlist->name() << endl;
1073                                 }
1074                                 break;
1075                         } else {
1076                                 i = _views.begin();
1077                         }
1078
1079                 } else {
1080                         ++i;
1081                 }
1082
1083                 if (_copy) {
1084                         copies.push_back (rv);
1085                 }
1086
1087                 cerr << "Done with TV, top = " << to_playlist << " from = " << from_playlist << endl;
1088
1089                 if (to_playlist) {
1090                         sdc.push_back (new StatefulDiffCommand (to_playlist));
1091                         cerr << "Saved diff for to:" << to_playlist->name() << endl;
1092                 }
1093
1094                 if (from_playlist && (from_playlist != to_playlist)) {
1095                         sdc.push_back (new StatefulDiffCommand (from_playlist));
1096                         cerr << "Saved diff for from:" << from_playlist->name() << endl;
1097                 }
1098         }
1099
1100         /*
1101            if we've created new regions either by copying or moving
1102            to a new track, we want to replace the old selection with the new ones
1103         */
1104
1105         if (new_views.size() > 0) {
1106                 _editor->selection->set (new_views);
1107         }
1108
1109         for (set<boost::shared_ptr<Playlist> >::iterator p = frozen_playlists.begin(); p != frozen_playlists.end(); ++p) {
1110                 (*p)->thaw();
1111         }
1112
1113   out:
1114         for (vector<StatefulDiffCommand*>::iterator i = sdc.begin(); i != sdc.end(); ++i) {
1115                 _editor->session()->add_command (*i);
1116         }
1117
1118         _editor->commit_reversible_command ();
1119
1120         for (vector<RegionView*>::iterator x = copies.begin(); x != copies.end(); ++x) {
1121                 delete *x;
1122         }
1123 }
1124
1125 void
1126 RegionMoveDrag::aborted ()
1127 {
1128         if (_copy) {
1129
1130                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1131                         delete i->view;
1132                 }
1133
1134                 _views.clear ();
1135
1136         } else {
1137                 RegionMotionDrag::aborted ();
1138         }
1139 }
1140
1141 void
1142 RegionMotionDrag::aborted ()
1143 {
1144         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1145                 RegionView* rv = i->view;
1146                 TimeAxisView* tv = &(rv->get_time_axis_view ());
1147                 RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1148                 assert (rtv);
1149                 rv->get_canvas_group()->reparent (*rtv->view()->canvas_item());
1150                 rv->get_canvas_group()->property_y() = 0;
1151                 rv->get_time_axis_view().reveal_dependent_views (*rv);
1152                 rv->fake_set_opaque (false);
1153                 rv->move (-_total_x_delta, 0);
1154                 rv->set_height (rtv->view()->child_height ());
1155         }
1156
1157         _editor->update_canvas_now ();
1158 }
1159
1160
1161 bool
1162 RegionMotionDrag::x_move_allowed () const
1163 {
1164         if (Config->get_edit_mode() == Lock) {
1165                 /* in locked edit mode, reverse the usual meaning of _x_constrained */
1166                 return _x_constrained;
1167         }
1168
1169         return !_x_constrained;
1170 }
1171
1172 void
1173 RegionMotionDrag::copy_regions (GdkEvent* event)
1174 {
1175         /* duplicate the regionview(s) and region(s) */
1176
1177         list<DraggingView> new_regionviews;
1178
1179         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1180
1181                 RegionView* rv = i->view;
1182                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
1183                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(rv);
1184
1185                 const boost::shared_ptr<const Region> original = rv->region();
1186                 boost::shared_ptr<Region> region_copy = RegionFactory::create (original);
1187                 region_copy->set_position (original->position(), this);
1188
1189                 RegionView* nrv;
1190                 if (arv) {
1191                         boost::shared_ptr<AudioRegion> audioregion_copy
1192                                 = boost::dynamic_pointer_cast<AudioRegion>(region_copy);
1193
1194                         nrv = new AudioRegionView (*arv, audioregion_copy);
1195                 } else if (mrv) {
1196                         boost::shared_ptr<MidiRegion> midiregion_copy
1197                                 = boost::dynamic_pointer_cast<MidiRegion>(region_copy);
1198                         nrv = new MidiRegionView (*mrv, midiregion_copy);
1199                 } else {
1200                         continue;
1201                 }
1202
1203                 nrv->get_canvas_group()->show ();
1204                 new_regionviews.push_back (DraggingView (nrv));
1205
1206                 /* swap _primary to the copy */
1207
1208                 if (rv == _primary) {
1209                         _primary = nrv;
1210                 }
1211
1212                 /* ..and deselect the one we copied */
1213
1214                 rv->set_selected (false);
1215         }
1216
1217         if (new_regionviews.empty()) {
1218                 return;
1219         }
1220
1221         /* reflect the fact that we are dragging the copies */
1222
1223         _views = new_regionviews;
1224
1225         swap_grab (new_regionviews.front().view->get_canvas_group (), 0, event ? event->motion.time : 0);
1226
1227         /*
1228            sync the canvas to what we think is its current state
1229            without it, the canvas seems to
1230            "forget" to update properly after the upcoming reparent()
1231            ..only if the mouse is in rapid motion at the time of the grab.
1232            something to do with regionview creation taking so long?
1233         */
1234         _editor->update_canvas_now();
1235 }
1236
1237 bool
1238 RegionMotionDrag::check_possible (RouteTimeAxisView** tv, layer_t* layer)
1239 {
1240         /* Which trackview is this ? */
1241
1242         pair<TimeAxisView*, int> const tvp = _editor->trackview_by_y_position (_drags->current_pointer_y ());
1243         (*tv) = dynamic_cast<RouteTimeAxisView*> (tvp.first);
1244         (*layer) = tvp.second;
1245
1246         if (*tv && (*tv)->layer_display() == Overlaid) {
1247                 *layer = 0;
1248         }
1249
1250         /* The region motion is only processed if the pointer is over
1251            an audio track.
1252         */
1253
1254         if (!(*tv) || !(*tv)->is_track()) {
1255                 /* To make sure we hide the verbose canvas cursor when the mouse is
1256                    not held over and audiotrack.
1257                 */
1258                 _editor->hide_verbose_canvas_cursor ();
1259                 return false;
1260         }
1261
1262         return true;
1263 }
1264
1265 /** @param new_order New track order.
1266  *  @param old_order Old track order.
1267  *  @param visible_y_low Lowest visible order.
1268  *  @return true if y movement should not happen, otherwise false.
1269  */
1270 bool
1271 RegionMotionDrag::y_movement_disallowed (int new_order, int old_order, int y_span, TimeAxisViewSummary const & tavs) const
1272 {
1273         if (new_order != old_order) {
1274
1275                 /* this isn't the pointer track */
1276
1277                 if (y_span > 0) {
1278
1279                         /* moving up the canvas */
1280                         if ( (new_order - y_span) >= tavs.visible_y_low) {
1281
1282                                 int32_t n = 0;
1283
1284                                 /* work out where we'll end up with this y span, taking hidden TimeAxisViews into account */
1285                                 int32_t visible_tracks = 0;
1286                                 while (visible_tracks < y_span ) {
1287                                         visible_tracks++;
1288                                         while (tavs.height_list[new_order - (visible_tracks - n)] == 0) {
1289                                                 /* passing through a hidden track */
1290                                                 n--;
1291                                         }
1292                                 }
1293
1294                                 if (tavs.tracks[new_order - (y_span - n)] != 0x00) {
1295                                         /* moving to a non-track; disallow */
1296                                         return true;
1297                                 }
1298
1299
1300                         } else {
1301                                 /* moving beyond the lowest visible track; disallow */
1302                                 return true;
1303                         }
1304
1305                 } else if (y_span < 0) {
1306
1307                         /* moving down the canvas */
1308                         if ((new_order - y_span) <= tavs.visible_y_high) {
1309
1310                                 int32_t visible_tracks = 0;
1311                                 int32_t n = 0;
1312                                 while (visible_tracks > y_span ) {
1313                                         visible_tracks--;
1314
1315                                         while (tavs.height_list[new_order - (visible_tracks - n)] == 0) {
1316                                                 /* passing through a hidden track */
1317                                                 n++;
1318                                         }
1319                                 }
1320
1321                                 if (tavs.tracks[new_order - (y_span - n)] != 0x00) {
1322                                         /* moving to a non-track; disallow */
1323                                         return true;
1324                                 }
1325
1326
1327                         } else {
1328
1329                                 /* moving beyond the highest visible track; disallow */
1330                                 return true;
1331                         }
1332                 }
1333
1334         } else {
1335
1336                 /* this is the pointer's track */
1337
1338                 if ((new_order - y_span) > tavs.visible_y_high) {
1339                         /* we will overflow */
1340                         return true;
1341                 } else if ((new_order - y_span) < tavs.visible_y_low) {
1342                         /* we will overflow */
1343                         return true;
1344                 }
1345         }
1346
1347         return false;
1348 }
1349
1350
1351 RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b, bool c)
1352         : RegionMotionDrag (e, i, p, v, b),
1353           _copy (c)
1354 {
1355         TimeAxisView* const tv = &_primary->get_time_axis_view ();
1356
1357         _dest_trackview = tv;
1358         if (tv->layer_display() == Overlaid) {
1359                 _dest_layer = 0;
1360         } else {
1361                 _dest_layer = _primary->region()->layer ();
1362         }
1363
1364         double speed = 1;
1365         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tv);
1366         if (rtv && rtv->is_track()) {
1367                 speed = rtv->track()->speed ();
1368         }
1369
1370         _last_frame_position = static_cast<nframes64_t> (_primary->region()->position() / speed);
1371 }
1372
1373 void
1374 RegionMoveDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
1375 {
1376         RegionMotionDrag::start_grab (event, c);
1377
1378         _pointer_frame_offset = grab_frame() - _last_frame_position;
1379 }
1380
1381 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, nframes64_t pos)
1382         : RegionMotionDrag (e, 0, 0, list<RegionView*> (), false)
1383 {
1384         assert ((boost::dynamic_pointer_cast<AudioRegion> (r) && dynamic_cast<AudioTimeAxisView*> (v)) ||
1385                 (boost::dynamic_pointer_cast<MidiRegion> (r) && dynamic_cast<MidiTimeAxisView*> (v)));
1386
1387         _primary = v->view()->create_region_view (r, false, false);
1388
1389         _primary->get_canvas_group()->show ();
1390         _primary->set_position (pos, 0);
1391         _views.push_back (DraggingView (_primary));
1392
1393         _last_frame_position = pos;
1394
1395         _item = _primary->get_canvas_group ();
1396         _dest_trackview = v;
1397         _dest_layer = _primary->region()->layer ();
1398 }
1399
1400 map<RegionView*, pair<RouteTimeAxisView*, int> >
1401 RegionMotionDrag::find_time_axis_views_and_layers ()
1402 {
1403         map<RegionView*, pair<RouteTimeAxisView*, int> > tav;
1404
1405         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1406
1407                 double ix1, ix2, iy1, iy2;
1408                 RegionView* rv = i->view;
1409                 rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
1410                 rv->get_canvas_frame()->i2w (ix1, iy1);
1411                 iy1 += _editor->vertical_adjustment.get_value() - _editor->canvas_timebars_vsize;
1412
1413                 pair<TimeAxisView*, int> tv = _editor->trackview_by_y_position (iy1);
1414                 tav[rv] = make_pair (dynamic_cast<RouteTimeAxisView*> (tv.first), tv.second);
1415         }
1416
1417         return tav;
1418 }
1419
1420
1421 void
1422 RegionInsertDrag::finished (GdkEvent* /*event*/, bool /*movement_occurred*/)
1423 {
1424         _editor->update_canvas_now ();
1425
1426         map<RegionView*, pair<RouteTimeAxisView*, int> > final = find_time_axis_views_and_layers ();
1427
1428         RouteTimeAxisView* dest_rtv = final[_primary].first;
1429
1430         _primary->get_canvas_group()->reparent (*dest_rtv->view()->canvas_item());
1431         _primary->get_canvas_group()->property_y() = 0;
1432
1433         boost::shared_ptr<Playlist> playlist = dest_rtv->playlist();
1434
1435         _editor->begin_reversible_command (_("insert region"));
1436         playlist->clear_history ();
1437         playlist->add_region (_primary->region (), _last_frame_position);
1438         _editor->session()->add_command (new StatefulDiffCommand (playlist));
1439         _editor->commit_reversible_command ();
1440
1441         delete _primary;
1442         _primary = 0;
1443         _views.clear ();
1444 }
1445
1446 void
1447 RegionInsertDrag::aborted ()
1448 {
1449         delete _primary;
1450         _primary = 0;
1451         _views.clear ();
1452 }
1453
1454 RegionSpliceDrag::RegionSpliceDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1455         : RegionMoveDrag (e, i, p, v, false, false)
1456 {
1457
1458 }
1459
1460 struct RegionSelectionByPosition {
1461     bool operator() (RegionView*a, RegionView* b) {
1462             return a->region()->position () < b->region()->position();
1463     }
1464 };
1465
1466 void
1467 RegionSpliceDrag::motion (GdkEvent* event, bool)
1468 {
1469         RouteTimeAxisView* tv;
1470         layer_t layer;
1471
1472         if (!check_possible (&tv, &layer)) {
1473                 return;
1474         }
1475
1476         int dir;
1477
1478         if ((_drags->current_pointer_x() - last_pointer_x()) > 0) {
1479                 dir = 1;
1480         } else {
1481                 dir = -1;
1482         }
1483
1484         RegionSelection copy (_editor->selection->regions);
1485
1486         RegionSelectionByPosition cmp;
1487         copy.sort (cmp);
1488
1489         nframes64_t const pf = adjusted_current_frame (event);
1490
1491         for (RegionSelection::iterator i = copy.begin(); i != copy.end(); ++i) {
1492
1493                 RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*> (&(*i)->get_time_axis_view());
1494
1495                 if (!atv) {
1496                         continue;
1497                 }
1498
1499                 boost::shared_ptr<Playlist> playlist;
1500
1501                 if ((playlist = atv->playlist()) == 0) {
1502                         continue;
1503                 }
1504
1505                 if (!playlist->region_is_shuffle_constrained ((*i)->region())) {
1506                         continue;
1507                 }
1508
1509                 if (dir > 0) {
1510                         if (pf < (*i)->region()->last_frame() + 1) {
1511                                 continue;
1512                         }
1513                 } else {
1514                         if (pf > (*i)->region()->first_frame()) {
1515                                 continue;
1516                         }
1517                 }
1518
1519
1520                 playlist->shuffle ((*i)->region(), dir);
1521         }
1522 }
1523
1524 void
1525 RegionSpliceDrag::finished (GdkEvent* /*event*/, bool)
1526 {
1527
1528 }
1529
1530 void
1531 RegionSpliceDrag::aborted ()
1532 {
1533         /* XXX: TODO */
1534 }
1535
1536 RegionCreateDrag::RegionCreateDrag (Editor* e, ArdourCanvas::Item* i, TimeAxisView* v)
1537         : Drag (e, i),
1538           _view (v)
1539 {
1540
1541 }
1542
1543 void
1544 RegionCreateDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
1545 {
1546         _dest_trackview = _view;
1547
1548         Drag::start_grab (event);
1549 }
1550
1551
1552 void
1553 RegionCreateDrag::motion (GdkEvent* /*event*/, bool first_move)
1554 {
1555         if (first_move) {
1556                 // TODO: create region-create-drag region view here
1557         }
1558
1559         // TODO: resize region-create-drag region view here
1560 }
1561
1562 void
1563 RegionCreateDrag::finished (GdkEvent* event, bool movement_occurred)
1564 {
1565         MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (_dest_trackview);
1566
1567         if (!mtv) {
1568                 return;
1569         }
1570
1571         if (!movement_occurred) {
1572                 mtv->add_region (grab_frame ());
1573         } else {
1574                 motion (event, false);
1575                 // TODO: create region-create-drag region here
1576         }
1577 }
1578
1579 void
1580 RegionCreateDrag::aborted ()
1581 {
1582         /* XXX: TODO */
1583 }
1584
1585 NoteResizeDrag::NoteResizeDrag (Editor* e, ArdourCanvas::Item* i)
1586         : Drag (e, i)
1587         , region (0)
1588 {
1589
1590 }
1591
1592 void
1593 NoteResizeDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*ignored*/)
1594 {
1595         Gdk::Cursor* cursor;
1596         ArdourCanvas::CanvasNote* cnote = dynamic_cast<ArdourCanvas::CanvasNote*>(_item);
1597
1598         Drag::start_grab (event);
1599
1600         region = &cnote->region_view();
1601
1602         double const region_start = region->get_position_pixels();
1603         double const middle_point = region_start + cnote->x1() + (cnote->x2() - cnote->x1()) / 2.0L;
1604
1605         if (grab_x() <= middle_point) {
1606                 cursor = _editor->left_side_trim_cursor;
1607                 at_front = true;
1608         } else {
1609                 cursor = _editor->right_side_trim_cursor;
1610                 at_front = false;
1611         }
1612
1613         _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, *cursor, event->motion.time);
1614
1615         if (event->motion.state & Keyboard::PrimaryModifier) {
1616                 relative = false;
1617         } else {
1618                 relative = true;
1619         }
1620
1621         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1622
1623         if (ms.size() > 1) {
1624                 /* has to be relative, may make no sense otherwise */
1625                 relative = true;
1626         }
1627
1628         /* select this note; if it is already selected, preserve the existing selection,
1629            otherwise make this note the only one selected.
1630         */
1631         region->note_selected (cnote, cnote->selected ());
1632
1633         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ) {
1634                 MidiRegionSelection::iterator next;
1635                 next = r;
1636                 ++next;
1637                 (*r)->begin_resizing (at_front);
1638                 r = next;
1639         }
1640 }
1641
1642 void
1643 NoteResizeDrag::motion (GdkEvent* /*event*/, bool /*first_move*/)
1644 {
1645         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1646         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1647                 (*r)->update_resizing (dynamic_cast<ArdourCanvas::CanvasNote*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1648         }
1649 }
1650
1651 void
1652 NoteResizeDrag::finished (GdkEvent*, bool /*movement_occurred*/)
1653 {
1654         MidiRegionSelection& ms (_editor->get_selection().midi_regions);
1655         for (MidiRegionSelection::iterator r = ms.begin(); r != ms.end(); ++r) {
1656                 (*r)->commit_resizing (dynamic_cast<ArdourCanvas::CanvasNote*>(_item), at_front, _drags->current_pointer_x() - grab_x(), relative);
1657         }
1658 }
1659
1660 void
1661 NoteResizeDrag::aborted ()
1662 {
1663         /* XXX: TODO */
1664 }
1665
1666 void
1667 RegionGainDrag::motion (GdkEvent* /*event*/, bool)
1668 {
1669
1670 }
1671
1672 void
1673 RegionGainDrag::finished (GdkEvent *, bool)
1674 {
1675
1676 }
1677
1678 void
1679 RegionGainDrag::aborted ()
1680 {
1681         /* XXX: TODO */
1682 }
1683
1684 TrimDrag::TrimDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
1685         : RegionDrag (e, i, p, v)
1686         , _have_transaction (false)
1687 {
1688
1689 }
1690
1691 void
1692 TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
1693 {
1694         double speed = 1.0;
1695         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1696         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1697
1698         if (tv && tv->is_track()) {
1699                 speed = tv->track()->speed();
1700         }
1701
1702         nframes64_t const region_start = (nframes64_t) (_primary->region()->position() / speed);
1703         nframes64_t const region_end = (nframes64_t) (_primary->region()->last_frame() / speed);
1704         nframes64_t const region_length = (nframes64_t) (_primary->region()->length() / speed);
1705
1706         nframes64_t const pf = adjusted_current_frame (event);
1707
1708         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1709                 _operation = ContentsTrim;
1710                 Drag::start_grab (event, _editor->trimmer_cursor);
1711         } else {
1712                 /* These will get overridden for a point trim.*/
1713                 if (pf < (region_start + region_length/2)) {
1714                         /* closer to start */
1715                         _operation = StartTrim;
1716                         Drag::start_grab (event, _editor->left_side_trim_cursor);
1717                 } else {
1718                         /* closer to end */
1719                         _operation = EndTrim;
1720                         Drag::start_grab (event, _editor->right_side_trim_cursor);
1721                 }
1722         }
1723
1724         switch (_operation) {
1725         case StartTrim:
1726                 _editor->show_verbose_time_cursor (region_start, 10);
1727                 break;
1728         case EndTrim:
1729                 _editor->show_verbose_time_cursor (region_end, 10);
1730                 break;
1731         case ContentsTrim:
1732                 _editor->show_verbose_time_cursor (pf, 10);
1733                 break;
1734         }
1735 }
1736
1737 void
1738 TrimDrag::motion (GdkEvent* event, bool first_move)
1739 {
1740         RegionView* rv = _primary;
1741
1742         /* snap modifier works differently here..
1743            its current state has to be passed to the
1744            various trim functions in order to work properly
1745         */
1746
1747         double speed = 1.0;
1748         TimeAxisView* tvp = &_primary->get_time_axis_view ();
1749         RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
1750         pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
1751
1752         if (tv && tv->is_track()) {
1753                 speed = tv->track()->speed();
1754         }
1755
1756         nframes64_t const pf = adjusted_current_frame (event);
1757
1758         if (first_move) {
1759
1760                 string trim_type;
1761
1762                 switch (_operation) {
1763                 case StartTrim:
1764                         trim_type = "Region start trim";
1765                         break;
1766                 case EndTrim:
1767                         trim_type = "Region end trim";
1768                         break;
1769                 case ContentsTrim:
1770                         trim_type = "Region content trim";
1771                         break;
1772                 }
1773
1774                 _editor->begin_reversible_command (trim_type);
1775                 _have_transaction = true;
1776
1777                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1778                         RegionView* rv = i->view;
1779                         rv->fake_set_opaque(false);
1780                         rv->enable_display (false);
1781                         rv->region()->clear_history ();
1782                         rv->region()->suspend_property_changes ();
1783
1784                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*> (rv);
1785
1786                         if (arv){
1787                                 arv->temporarily_hide_envelope ();
1788                         }
1789
1790                         boost::shared_ptr<Playlist> pl = rv->region()->playlist();
1791                         insert_result = _editor->motion_frozen_playlists.insert (pl);
1792
1793                         if (insert_result.second) {
1794                                 pl->freeze();
1795                         }
1796                 }
1797         }
1798
1799         bool non_overlap_trim = false;
1800
1801         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
1802                 non_overlap_trim = true;
1803         }
1804
1805         switch (_operation) {
1806         case StartTrim:
1807                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1808                         _editor->single_start_trim (*i->view, pf, non_overlap_trim);
1809                 }
1810                 break;
1811
1812         case EndTrim:
1813                 for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1814                         _editor->single_end_trim (*i->view, pf, non_overlap_trim);
1815                 }
1816                 break;
1817
1818         case ContentsTrim:
1819                 {
1820                         bool swap_direction = false;
1821
1822                         if (event && Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
1823                                 swap_direction = true;
1824                         }
1825
1826                         nframes64_t frame_delta = 0;
1827
1828                         bool left_direction = false;
1829                         if (last_pointer_frame() > pf) {
1830                                 left_direction = true;
1831                         }
1832
1833                         if (left_direction) {
1834                                 frame_delta = (last_pointer_frame() - pf);
1835                         } else {
1836                                 frame_delta = (pf - last_pointer_frame());
1837                         }
1838
1839                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1840                                 _editor->single_contents_trim (*i->view, frame_delta, left_direction, swap_direction);
1841                         }
1842                 }
1843                 break;
1844         }
1845
1846         switch (_operation) {
1847         case StartTrim:
1848                 _editor->show_verbose_time_cursor((nframes64_t) (rv->region()->position()/speed), 10);
1849                 break;
1850         case EndTrim:
1851                 _editor->show_verbose_time_cursor((nframes64_t) (rv->region()->last_frame()/speed), 10);
1852                 break;
1853         case ContentsTrim:
1854                 _editor->show_verbose_time_cursor (pf, 10);
1855                 break;
1856         }
1857 }
1858
1859
1860 void
1861 TrimDrag::finished (GdkEvent* event, bool movement_occurred)
1862 {
1863         if (movement_occurred) {
1864                 motion (event, false);
1865
1866                 if (!_editor->selection->selected (_primary)) {
1867                         _editor->thaw_region_after_trim (*_primary);
1868                 } else {
1869
1870                         for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
1871                                 _editor->thaw_region_after_trim (*i->view);
1872                                 i->view->enable_display (true);
1873                                 i->view->fake_set_opaque (true);
1874                                 if (_have_transaction) {
1875                                         _editor->session()->add_command (new StatefulDiffCommand (i->view->region()));
1876                                 }
1877                         }
1878                 }
1879                 for (set<boost::shared_ptr<Playlist> >::iterator p = _editor->motion_frozen_playlists.begin(); p != _editor->motion_frozen_playlists.end(); ++p) {
1880                         (*p)->thaw ();
1881                 }
1882
1883                 _editor->motion_frozen_playlists.clear ();
1884
1885                 if (_have_transaction) {
1886                         _editor->commit_reversible_command();
1887                 }
1888
1889         } else {
1890                 /* no mouse movement */
1891                 _editor->point_trim (event, adjusted_current_frame (event));
1892         }
1893 }
1894
1895 void
1896 TrimDrag::aborted ()
1897 {
1898         /* Our motion method is changing model state, so use the Undo system
1899            to cancel.  Perhaps not ideal, as this will leave an Undo point
1900            behind which may be slightly odd from the user's point of view.
1901         */
1902
1903         finished (0, true);
1904
1905         if (_have_transaction) {
1906                 _editor->undo ();
1907         }
1908 }
1909
1910 MeterMarkerDrag::MeterMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
1911         : Drag (e, i),
1912           _copy (c)
1913 {
1914         _marker = reinterpret_cast<MeterMarker*> (_item->get_data ("marker"));
1915         assert (_marker);
1916 }
1917
1918 void
1919 MeterMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
1920 {
1921         if (_copy) {
1922                 // create a dummy marker for visual representation of moving the copy.
1923                 // The actual copying is not done before we reach the finish callback.
1924                 char name[64];
1925                 snprintf (name, sizeof(name), "%g/%g", _marker->meter().beats_per_bar(), _marker->meter().note_divisor ());
1926                 MeterMarker* new_marker = new MeterMarker(*_editor, *_editor->meter_group, ARDOUR_UI::config()->canvasvar_MeterMarker.get(), name,
1927                                                           *new MeterSection (_marker->meter()));
1928
1929                 _item = &new_marker->the_item ();
1930                 _marker = new_marker;
1931
1932         } else {
1933
1934                 MetricSection& section (_marker->meter());
1935
1936                 if (!section.movable()) {
1937                         return;
1938                 }
1939
1940         }
1941
1942         Drag::start_grab (event, cursor);
1943
1944         _pointer_frame_offset = grab_frame() - _marker->meter().frame();
1945
1946         _editor->show_verbose_time_cursor (adjusted_current_frame(event), 10);
1947 }
1948
1949 void
1950 MeterMarkerDrag::motion (GdkEvent* event, bool)
1951 {
1952         nframes64_t const pf = adjusted_current_frame (event);
1953
1954         _marker->set_position (pf);
1955
1956         _editor->show_verbose_time_cursor (pf, 10);
1957 }
1958
1959 void
1960 MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
1961 {
1962         if (!movement_occurred) {
1963                 return;
1964         }
1965
1966         motion (event, false);
1967
1968         BBT_Time when;
1969
1970         TempoMap& map (_editor->session()->tempo_map());
1971         map.bbt_time (last_pointer_frame(), when);
1972
1973         if (_copy == true) {
1974                 _editor->begin_reversible_command (_("copy meter mark"));
1975                 XMLNode &before = map.get_state();
1976                 map.add_meter (_marker->meter(), when);
1977                 XMLNode &after = map.get_state();
1978                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
1979                 _editor->commit_reversible_command ();
1980
1981                 // delete the dummy marker we used for visual representation of copying.
1982                 // a new visual marker will show up automatically.
1983                 delete _marker;
1984         } else {
1985                 _editor->begin_reversible_command (_("move meter mark"));
1986                 XMLNode &before = map.get_state();
1987                 map.move_meter (_marker->meter(), when);
1988                 XMLNode &after = map.get_state();
1989                 _editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
1990                 _editor->commit_reversible_command ();
1991         }
1992 }
1993
1994 void
1995 MeterMarkerDrag::aborted ()
1996 {
1997         _marker->set_position (_marker->meter().frame ());
1998 }
1999
2000 TempoMarkerDrag::TempoMarkerDrag (Editor* e, ArdourCanvas::Item* i, bool c)
2001         : Drag (e, i),
2002           _copy (c)
2003 {
2004         _marker = reinterpret_cast<TempoMarker*> (_item->get_data ("marker"));
2005         assert (_marker);
2006 }
2007
2008 void
2009 TempoMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2010 {
2011
2012         if (_copy) {
2013
2014                 // create a dummy marker for visual representation of moving the copy.
2015                 // The actual copying is not done before we reach the finish callback.
2016                 char name[64];
2017                 snprintf (name, sizeof (name), "%.2f", _marker->tempo().beats_per_minute());
2018                 TempoMarker* new_marker = new TempoMarker(*_editor, *_editor->tempo_group, ARDOUR_UI::config()->canvasvar_TempoMarker.get(), name,
2019                                                           *new TempoSection (_marker->tempo()));
2020
2021                 _item = &new_marker->the_item ();
2022                 _marker = new_marker;
2023
2024         } else {
2025
2026                 MetricSection& section (_marker->tempo());
2027
2028                 if (!section.movable()) {
2029                         return;
2030                 }
2031         }
2032
2033         Drag::start_grab (event, cursor);
2034
2035         _pointer_frame_offset = grab_frame() - _marker->tempo().frame();
2036         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
2037 }
2038
2039 void
2040 TempoMarkerDrag::motion (GdkEvent* event, bool)
2041 {
2042         nframes64_t const pf = adjusted_current_frame (event);
2043         _marker->set_position (pf);
2044         _editor->show_verbose_time_cursor (pf, 10);
2045 }
2046
2047 void
2048 TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2049 {
2050         if (!movement_occurred) {
2051                 return;
2052         }
2053
2054         motion (event, false);
2055
2056         BBT_Time when;
2057
2058         TempoMap& map (_editor->session()->tempo_map());
2059         map.bbt_time (last_pointer_frame(), when);
2060
2061         if (_copy == true) {
2062                 _editor->begin_reversible_command (_("copy tempo mark"));
2063                 XMLNode &before = map.get_state();
2064                 map.add_tempo (_marker->tempo(), when);
2065                 XMLNode &after = map.get_state();
2066                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
2067                 _editor->commit_reversible_command ();
2068
2069                 // delete the dummy marker we used for visual representation of copying.
2070                 // a new visual marker will show up automatically.
2071                 delete _marker;
2072         } else {
2073                 _editor->begin_reversible_command (_("move tempo mark"));
2074                 XMLNode &before = map.get_state();
2075                 map.move_tempo (_marker->tempo(), when);
2076                 XMLNode &after = map.get_state();
2077                 _editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
2078                 _editor->commit_reversible_command ();
2079         }
2080 }
2081
2082 void
2083 TempoMarkerDrag::aborted ()
2084 {
2085         _marker->set_position (_marker->tempo().frame());
2086 }
2087
2088 CursorDrag::CursorDrag (Editor* e, ArdourCanvas::Item* i, bool s)
2089         : Drag (e, i),
2090           _stop (s)
2091 {
2092         _cursor = reinterpret_cast<EditorCursor*> (_item->get_data ("cursor"));
2093         assert (_cursor);
2094 }
2095
2096 void
2097 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
2098 {
2099         Drag::start_grab (event, c);
2100
2101         if (!_stop) {
2102
2103                 nframes64_t where = _editor->event_frame (event, 0, 0);
2104
2105                 _editor->snap_to_with_modifier (where, event);
2106                 _editor->playhead_cursor->set_position (where);
2107
2108         }
2109
2110         if (_cursor == _editor->playhead_cursor) {
2111                 _editor->_dragging_playhead = true;
2112
2113                 if (_editor->session() && _was_rolling && _stop) {
2114                         _editor->session()->request_stop ();
2115                 }
2116
2117                 if (_editor->session() && _editor->session()->is_auditioning()) {
2118                         _editor->session()->cancel_audition ();
2119                 }
2120         }
2121
2122         _pointer_frame_offset = grab_frame() - _cursor->current_frame;
2123
2124         _editor->show_verbose_time_cursor (_cursor->current_frame, 10);
2125 }
2126
2127 void
2128 CursorDrag::motion (GdkEvent* event, bool)
2129 {
2130         nframes64_t const adjusted_frame = adjusted_current_frame (event);
2131
2132         if (adjusted_frame == last_pointer_frame()) {
2133                 return;
2134         }
2135
2136         _cursor->set_position (adjusted_frame);
2137
2138         _editor->show_verbose_time_cursor (_cursor->current_frame, 10);
2139
2140         if (_editor->session() && _item == &_editor->playhead_cursor->canvas_item) {
2141                 _editor->session()->send_mmc_locate (_editor->playhead_cursor->current_frame);
2142         }
2143
2144
2145 #ifdef GTKOSX
2146         _editor->update_canvas_now ();
2147 #endif
2148         _editor->UpdateAllTransportClocks (_cursor->current_frame);
2149 }
2150
2151 void
2152 CursorDrag::finished (GdkEvent* event, bool movement_occurred)
2153 {
2154         _editor->_dragging_playhead = false;
2155
2156         if (!movement_occurred && _stop) {
2157                 return;
2158         }
2159
2160         motion (event, false);
2161
2162         if (_item == &_editor->playhead_cursor->canvas_item) {
2163                 if (_editor->session()) {
2164                         _editor->session()->request_locate (_editor->playhead_cursor->current_frame, _was_rolling);
2165                         _editor->_pending_locate_request = true;
2166                 }
2167         }
2168 }
2169
2170 void
2171 CursorDrag::aborted ()
2172 {
2173         _editor->_dragging_playhead = false;
2174         _cursor->set_position (adjusted_frame (grab_frame (), 0, false));
2175 }
2176
2177 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2178         : RegionDrag (e, i, p, v)
2179 {
2180
2181 }
2182
2183 void
2184 FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2185 {
2186         Drag::start_grab (event, cursor);
2187
2188         AudioRegionView* a = dynamic_cast<AudioRegionView*> (_primary);
2189         boost::shared_ptr<AudioRegion> const r = a->audio_region ();
2190
2191         _pointer_frame_offset = grab_frame() - ((nframes64_t) r->fade_in()->back()->when + r->position());
2192         _editor->show_verbose_duration_cursor (r->position(), r->position() + r->fade_in()->back()->when, 10);
2193
2194 }
2195
2196 void
2197 FadeInDrag::motion (GdkEvent* event, bool)
2198 {
2199         nframes64_t fade_length;
2200
2201         nframes64_t const pos = adjusted_current_frame (event);
2202
2203         boost::shared_ptr<Region> region = _primary->region ();
2204
2205         if (pos < (region->position() + 64)) {
2206                 fade_length = 64; // this should be a minimum defined somewhere
2207         } else if (pos > region->last_frame()) {
2208                 fade_length = region->length();
2209         } else {
2210                 fade_length = pos - region->position();
2211         }
2212
2213         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2214
2215                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2216
2217                 if (!tmp) {
2218                         continue;
2219                 }
2220
2221                 tmp->reset_fade_in_shape_width (fade_length);
2222         }
2223
2224         _editor->show_verbose_duration_cursor (region->position(), region->position() + fade_length, 10);
2225 }
2226
2227 void
2228 FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
2229 {
2230         if (!movement_occurred) {
2231                 return;
2232         }
2233
2234         nframes64_t fade_length;
2235
2236         nframes64_t const pos = adjusted_current_frame (event);
2237
2238         boost::shared_ptr<Region> region = _primary->region ();
2239
2240         if (pos < (region->position() + 64)) {
2241                 fade_length = 64; // this should be a minimum defined somewhere
2242         } else if (pos > region->last_frame()) {
2243                 fade_length = region->length();
2244         } else {
2245                 fade_length = pos - region->position();
2246         }
2247
2248         _editor->begin_reversible_command (_("change fade in length"));
2249
2250         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2251
2252                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2253
2254                 if (!tmp) {
2255                         continue;
2256                 }
2257
2258                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_in();
2259                 XMLNode &before = alist->get_state();
2260
2261                 tmp->audio_region()->set_fade_in_length (fade_length);
2262                 tmp->audio_region()->set_fade_in_active (true);
2263
2264                 XMLNode &after = alist->get_state();
2265                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2266         }
2267
2268         _editor->commit_reversible_command ();
2269 }
2270
2271 void
2272 FadeInDrag::aborted ()
2273 {
2274         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2275                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2276
2277                 if (!tmp) {
2278                         continue;
2279                 }
2280
2281                 tmp->reset_fade_in_shape_width (tmp->audio_region()->fade_in()->back()->when);
2282         }
2283 }
2284
2285 FadeOutDrag::FadeOutDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
2286         : RegionDrag (e, i, p, v)
2287 {
2288
2289 }
2290
2291 void
2292 FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2293 {
2294         Drag::start_grab (event, cursor);
2295
2296         AudioRegionView* a = dynamic_cast<AudioRegionView*> (_primary);
2297         boost::shared_ptr<AudioRegion> r = a->audio_region ();
2298
2299         _pointer_frame_offset = grab_frame() - (r->length() - (nframes64_t) r->fade_out()->back()->when + r->position());
2300         _editor->show_verbose_duration_cursor (r->last_frame() - r->fade_out()->back()->when, r->last_frame(), 10);
2301 }
2302
2303 void
2304 FadeOutDrag::motion (GdkEvent* event, bool)
2305 {
2306         nframes64_t fade_length;
2307
2308         nframes64_t const pos = adjusted_current_frame (event);
2309
2310         boost::shared_ptr<Region> region = _primary->region ();
2311
2312         if (pos > (region->last_frame() - 64)) {
2313                 fade_length = 64; // this should really be a minimum fade defined somewhere
2314         }
2315         else if (pos < region->position()) {
2316                 fade_length = region->length();
2317         }
2318         else {
2319                 fade_length = region->last_frame() - pos;
2320         }
2321
2322         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2323
2324                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2325
2326                 if (!tmp) {
2327                         continue;
2328                 }
2329
2330                 tmp->reset_fade_out_shape_width (fade_length);
2331         }
2332
2333         _editor->show_verbose_duration_cursor (region->last_frame() - fade_length, region->last_frame(), 10);
2334 }
2335
2336 void
2337 FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
2338 {
2339         if (!movement_occurred) {
2340                 return;
2341         }
2342
2343         nframes64_t fade_length;
2344
2345         nframes64_t const pos = adjusted_current_frame (event);
2346
2347         boost::shared_ptr<Region> region = _primary->region ();
2348
2349         if (pos > (region->last_frame() - 64)) {
2350                 fade_length = 64; // this should really be a minimum fade defined somewhere
2351         }
2352         else if (pos < region->position()) {
2353                 fade_length = region->length();
2354         }
2355         else {
2356                 fade_length = region->last_frame() - pos;
2357         }
2358
2359         _editor->begin_reversible_command (_("change fade out length"));
2360
2361         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2362
2363                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2364
2365                 if (!tmp) {
2366                         continue;
2367                 }
2368
2369                 boost::shared_ptr<AutomationList> alist = tmp->audio_region()->fade_out();
2370                 XMLNode &before = alist->get_state();
2371
2372                 tmp->audio_region()->set_fade_out_length (fade_length);
2373                 tmp->audio_region()->set_fade_out_active (true);
2374
2375                 XMLNode &after = alist->get_state();
2376                 _editor->session()->add_command(new MementoCommand<AutomationList>(*alist.get(), &before, &after));
2377         }
2378
2379         _editor->commit_reversible_command ();
2380 }
2381
2382 void
2383 FadeOutDrag::aborted ()
2384 {
2385         for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
2386                 AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (i->view);
2387
2388                 if (!tmp) {
2389                         continue;
2390                 }
2391
2392                 tmp->reset_fade_out_shape_width (tmp->audio_region()->fade_out()->back()->when);
2393         }
2394 }
2395
2396 MarkerDrag::MarkerDrag (Editor* e, ArdourCanvas::Item* i)
2397         : Drag (e, i)
2398 {
2399         _marker = reinterpret_cast<Marker*> (_item->get_data ("marker"));
2400         assert (_marker);
2401
2402         _points.push_back (Gnome::Art::Point (0, 0));
2403         _points.push_back (Gnome::Art::Point (0, _editor->physical_screen_height));
2404
2405         _line = new ArdourCanvas::Line (*_editor->timebar_group);
2406         _line->property_width_pixels() = 1;
2407         _line->property_points () = _points;
2408         _line->hide ();
2409
2410         _line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MarkerDragLine.get();
2411 }
2412
2413 MarkerDrag::~MarkerDrag ()
2414 {
2415         for (list<Location*>::iterator i = _copied_locations.begin(); i != _copied_locations.end(); ++i) {
2416                 delete *i;
2417         }
2418 }
2419
2420 void
2421 MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
2422 {
2423         Drag::start_grab (event, cursor);
2424
2425         bool is_start;
2426
2427         Location *location = _editor->find_location_from_marker (_marker, is_start);
2428         _editor->_dragging_edit_point = true;
2429
2430         _pointer_frame_offset = grab_frame() - (is_start ? location->start() : location->end());
2431
2432         update_item (location);
2433
2434         // _drag_line->show();
2435         // _line->raise_to_top();
2436
2437         if (is_start) {
2438                 _editor->show_verbose_time_cursor (location->start(), 10);
2439         } else {
2440                 _editor->show_verbose_time_cursor (location->end(), 10);
2441         }
2442
2443         Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2444
2445         switch (op) {
2446         case Selection::Toggle:
2447                 _editor->selection->toggle (_marker);
2448                 break;
2449         case Selection::Set:
2450                 if (!_editor->selection->selected (_marker)) {
2451                         _editor->selection->set (_marker);
2452                 }
2453                 break;
2454         case Selection::Extend:
2455         {
2456                 Locations::LocationList ll;
2457                 list<Marker*> to_add;
2458                 nframes64_t s, e;
2459                 _editor->selection->markers.range (s, e);
2460                 s = min (_marker->position(), s);
2461                 e = max (_marker->position(), e);
2462                 s = min (s, e);
2463                 e = max (s, e);
2464                 if (e < max_frames) {
2465                         ++e;
2466                 }
2467                 _editor->session()->locations()->find_all_between (s, e, ll, Location::Flags (0));
2468                 for (Locations::LocationList::iterator i = ll.begin(); i != ll.end(); ++i) {
2469                         Editor::LocationMarkers* lm = _editor->find_location_markers (*i);
2470                         if (lm) {
2471                                 if (lm->start) {
2472                                         to_add.push_back (lm->start);
2473                                 }
2474                                 if (lm->end) {
2475                                         to_add.push_back (lm->end);
2476                                 }
2477                         }
2478                 }
2479                 if (!to_add.empty()) {
2480                         _editor->selection->add (to_add);
2481                 }
2482                 break;
2483         }
2484         case Selection::Add:
2485                 _editor->selection->add (_marker);
2486                 break;
2487         }
2488
2489         /* Set up copies for us to manipulate during the drag */
2490
2491         for (MarkerSelection::iterator i = _editor->selection->markers.begin(); i != _editor->selection->markers.end(); ++i) {
2492                 Location* l = _editor->find_location_from_marker (*i, is_start);
2493                 _copied_locations.push_back (new Location (*l));
2494         }
2495 }
2496
2497 void
2498 MarkerDrag::motion (GdkEvent* event, bool)
2499 {
2500         nframes64_t f_delta = 0;
2501         bool is_start;
2502         bool move_both = false;
2503         Marker* marker;
2504         Location *real_location;
2505         Location *copy_location = 0;
2506
2507         nframes64_t const newframe = adjusted_current_frame (event);
2508
2509         nframes64_t next = newframe;
2510
2511         if (newframe == last_pointer_frame()) {
2512                 return;
2513         }
2514
2515         if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
2516                 move_both = true;
2517         }
2518
2519         MarkerSelection::iterator i;
2520         list<Location*>::iterator x;
2521
2522         /* find the marker we're dragging, and compute the delta */
2523
2524         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2525              x != _copied_locations.end() && i != _editor->selection->markers.end();
2526              ++i, ++x) {
2527
2528                 copy_location = *x;
2529                 marker = *i;
2530
2531                 if (marker == _marker) {
2532
2533                         if ((real_location = _editor->find_location_from_marker (marker, is_start)) == 0) {
2534                                 /* que pasa ?? */
2535                                 return;
2536                         }
2537
2538                         if (real_location->is_mark()) {
2539                                 f_delta = newframe - copy_location->start();
2540                         } else {
2541
2542
2543                                 switch (marker->type()) {
2544                                 case Marker::Start:
2545                                 case Marker::LoopStart:
2546                                 case Marker::PunchIn:
2547                                         f_delta = newframe - copy_location->start();
2548                                         break;
2549
2550                                 case Marker::End:
2551                                 case Marker::LoopEnd:
2552                                 case Marker::PunchOut:
2553                                         f_delta = newframe - copy_location->end();
2554                                         break;
2555                                 default:
2556                                         /* what kind of marker is this ? */
2557                                         return;
2558                                 }
2559                         }
2560                         break;
2561                 }
2562         }
2563
2564         if (i == _editor->selection->markers.end()) {
2565                 /* hmm, impossible - we didn't find the dragged marker */
2566                 return;
2567         }
2568
2569         /* now move them all */
2570
2571         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2572              x != _copied_locations.end() && i != _editor->selection->markers.end();
2573              ++i, ++x) {
2574
2575                 copy_location = *x;
2576                 marker = *i;
2577
2578                 /* call this to find out if its the start or end */
2579
2580                 if ((real_location = _editor->find_location_from_marker (marker, is_start)) == 0) {
2581                         continue;
2582                 }
2583
2584                 if (real_location->locked()) {
2585                         continue;
2586                 }
2587
2588                 if (copy_location->is_mark()) {
2589
2590                         /* now move it */
2591
2592                         copy_location->set_start (copy_location->start() + f_delta);
2593
2594                 } else {
2595
2596                         nframes64_t new_start = copy_location->start() + f_delta;
2597                         nframes64_t new_end = copy_location->end() + f_delta;
2598
2599                         if (is_start) { // start-of-range marker
2600
2601                                 if (move_both) {
2602                                         copy_location->set_start (new_start);
2603                                         copy_location->set_end (new_end);
2604                                 } else  if (new_start < copy_location->end()) {
2605                                         copy_location->set_start (new_start);
2606                                 } else {
2607                                         _editor->snap_to (next, 1, true);
2608                                         copy_location->set_end (next);
2609                                         copy_location->set_start (newframe);
2610                                 }
2611
2612                         } else { // end marker
2613
2614                                 if (move_both) {
2615                                         copy_location->set_end (new_end);
2616                                         copy_location->set_start (new_start);
2617                                 } else if (new_end > copy_location->start()) {
2618                                         copy_location->set_end (new_end);
2619                                 } else if (newframe > 0) {
2620                                         _editor->snap_to (next, -1, true);
2621                                         copy_location->set_start (next);
2622                                         copy_location->set_end (newframe);
2623                                 }
2624                         }
2625                 }
2626
2627                 update_item (copy_location);
2628
2629                 Editor::LocationMarkers* lm = _editor->find_location_markers (real_location);
2630
2631                 if (lm) {
2632                         lm->set_position (copy_location->start(), copy_location->end());
2633                 }
2634         }
2635
2636         assert (!_copied_locations.empty());
2637
2638         _editor->show_verbose_time_cursor (newframe, 10);
2639
2640 #ifdef GTKOSX
2641         _editor->update_canvas_now ();
2642 #endif
2643 }
2644
2645 void
2646 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
2647 {
2648         if (!movement_occurred) {
2649
2650                 /* just a click, do nothing but finish
2651                    off the selection process
2652                 */
2653
2654                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
2655
2656                 switch (op) {
2657                 case Selection::Set:
2658                         if (_editor->selection->selected (_marker) && _editor->selection->markers.size() > 1) {
2659                                 _editor->selection->set (_marker);
2660                         }
2661                         break;
2662
2663                 case Selection::Toggle:
2664                 case Selection::Extend:
2665                 case Selection::Add:
2666                         break;
2667                 }
2668
2669                 return;
2670         }
2671
2672         _editor->_dragging_edit_point = false;
2673
2674         _editor->begin_reversible_command ( _("move marker") );
2675         XMLNode &before = _editor->session()->locations()->get_state();
2676
2677         MarkerSelection::iterator i;
2678         list<Location*>::iterator x;
2679         bool is_start;
2680
2681         for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
2682              x != _copied_locations.end() && i != _editor->selection->markers.end();
2683              ++i, ++x) {
2684
2685                 Location * location = _editor->find_location_from_marker (*i, is_start);
2686
2687                 if (location) {
2688
2689                         if (location->locked()) {
2690                                 return;
2691                         }
2692
2693                         if (location->is_mark()) {
2694                                 location->set_start ((*x)->start());
2695                         } else {
2696                                 location->set ((*x)->start(), (*x)->end());
2697                         }
2698                 }
2699         }
2700
2701         XMLNode &after = _editor->session()->locations()->get_state();
2702         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
2703         _editor->commit_reversible_command ();
2704
2705         _line->hide();
2706 }
2707
2708 void
2709 MarkerDrag::aborted ()
2710 {
2711         /* XXX: TODO */
2712 }
2713
2714 void
2715 MarkerDrag::update_item (Location* location)
2716 {
2717         double const x1 = _editor->frame_to_pixel (location->start());
2718
2719         _points.front().set_x(x1);
2720         _points.back().set_x(x1);
2721         _line->property_points() = _points;
2722 }
2723
2724 ControlPointDrag::ControlPointDrag (Editor* e, ArdourCanvas::Item* i)
2725         : Drag (e, i),
2726           _cumulative_x_drag (0),
2727           _cumulative_y_drag (0)
2728 {
2729         _point = reinterpret_cast<ControlPoint*> (_item->get_data ("control_point"));
2730         assert (_point);
2731 }
2732
2733
2734 void
2735 ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2736 {
2737         Drag::start_grab (event, _editor->fader_cursor);
2738
2739         // start the grab at the center of the control point so
2740         // the point doesn't 'jump' to the mouse after the first drag
2741         _time_axis_view_grab_x = _point->get_x();
2742         _time_axis_view_grab_y = _point->get_y();
2743
2744         float const fraction = 1 - (_point->get_y() / _point->line().height());
2745
2746         _point->line().start_drag_single (_point, _time_axis_view_grab_x, fraction);
2747
2748         _editor->set_verbose_canvas_cursor (_point->line().get_verbose_cursor_string (fraction),
2749                                             event->button.x + 10, event->button.y + 10);
2750
2751         _editor->show_verbose_canvas_cursor ();
2752 }
2753
2754 void
2755 ControlPointDrag::motion (GdkEvent* event, bool)
2756 {
2757         double dx = _drags->current_pointer_x() - last_pointer_x();
2758         double dy = _drags->current_pointer_y() - last_pointer_y();
2759
2760         if (event->button.state & Keyboard::SecondaryModifier) {
2761                 dx *= 0.1;
2762                 dy *= 0.1;
2763         }
2764
2765         /* coordinate in TimeAxisView's space */
2766         double cx = _time_axis_view_grab_x + _cumulative_x_drag + dx;
2767         double cy = _time_axis_view_grab_y + _cumulative_y_drag + dy;
2768
2769         // calculate zero crossing point. back off by .01 to stay on the
2770         // positive side of zero
2771         double const zero_gain_y = (1.0 - _zero_gain_fraction) * _point->line().height() - .01;
2772
2773         // make sure we hit zero when passing through
2774         if ((cy < zero_gain_y && (cy - dy) > zero_gain_y) || (cy > zero_gain_y && (cy - dy) < zero_gain_y)) {
2775                 cy = zero_gain_y;
2776         }
2777
2778         if (_x_constrained) {
2779                 cx = _time_axis_view_grab_x;
2780         }
2781         if (_y_constrained) {
2782                 cy = _time_axis_view_grab_y;
2783         }
2784
2785         _cumulative_x_drag = cx - _time_axis_view_grab_x;
2786         _cumulative_y_drag = cy - _time_axis_view_grab_y;
2787
2788         cx = max (0.0, cx);
2789         cy = max (0.0, cy);
2790         cy = min ((double) _point->line().height(), cy);
2791
2792         nframes64_t cx_frames = _editor->unit_to_frame (cx);
2793
2794         if (!_x_constrained) {
2795                 _editor->snap_to_with_modifier (cx_frames, event);
2796         }
2797
2798         float const fraction = 1.0 - (cy / _point->line().height());
2799
2800         bool const push = Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier);
2801
2802         _point->line().drag_motion (_editor->frame_to_unit (cx_frames), fraction, false, push);
2803
2804         _editor->set_verbose_canvas_cursor_text (_point->line().get_verbose_cursor_string (fraction));
2805 }
2806
2807 void
2808 ControlPointDrag::finished (GdkEvent* event, bool movement_occurred)
2809 {
2810         if (!movement_occurred) {
2811
2812                 /* just a click */
2813
2814                 if ((event->type == GDK_BUTTON_RELEASE) && (event->button.button == 1) && Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
2815                         _editor->reset_point_selection ();
2816                 }
2817
2818         } else {
2819                 motion (event, false);
2820         }
2821         _point->line().end_drag ();
2822 }
2823
2824 void
2825 ControlPointDrag::aborted ()
2826 {
2827         _point->line().reset ();
2828 }
2829
2830 bool
2831 ControlPointDrag::active (Editing::MouseMode m)
2832 {
2833         if (m == Editing::MouseGain) {
2834                 /* always active in mouse gain */
2835                 return true;
2836         }
2837
2838         /* otherwise active if the point is on an automation line (ie not if its on a region gain line) */
2839         return dynamic_cast<AutomationLine*> (&(_point->line())) != 0;
2840 }
2841
2842 LineDrag::LineDrag (Editor* e, ArdourCanvas::Item* i)
2843         : Drag (e, i),
2844           _line (0),
2845           _cumulative_y_drag (0)
2846 {
2847
2848 }
2849 void
2850 LineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2851 {
2852         _line = reinterpret_cast<AutomationLine*> (_item->get_data ("line"));
2853         assert (_line);
2854
2855         _item = &_line->grab_item ();
2856
2857         /* need to get x coordinate in terms of parent (TimeAxisItemView)
2858            origin, and ditto for y.
2859         */
2860
2861         double cx = event->button.x;
2862         double cy = event->button.y;
2863
2864         _line->parent_group().w2i (cx, cy);
2865
2866         nframes64_t const frame_within_region = (nframes64_t) floor (cx * _editor->frames_per_unit);
2867
2868         uint32_t before;
2869         uint32_t after;
2870
2871         if (!_line->control_points_adjacent (frame_within_region, before, after)) {
2872                 /* no adjacent points */
2873                 return;
2874         }
2875
2876         Drag::start_grab (event, _editor->fader_cursor);
2877
2878         /* store grab start in parent frame */
2879
2880         _time_axis_view_grab_x = cx;
2881         _time_axis_view_grab_y = cy;
2882
2883         double fraction = 1.0 - (cy / _line->height());
2884
2885         _line->start_drag_line (before, after, fraction);
2886
2887         _editor->set_verbose_canvas_cursor (_line->get_verbose_cursor_string (fraction),
2888                                             event->button.x + 10, event->button.y + 10);
2889
2890         _editor->show_verbose_canvas_cursor ();
2891 }
2892
2893 void
2894 LineDrag::motion (GdkEvent* event, bool)
2895 {
2896         double dy = _drags->current_pointer_y() - last_pointer_y();
2897
2898         if (event->button.state & Keyboard::SecondaryModifier) {
2899                 dy *= 0.1;
2900         }
2901
2902         double cy = _time_axis_view_grab_y + _cumulative_y_drag + dy;
2903
2904         _cumulative_y_drag = cy - _time_axis_view_grab_y;
2905
2906         cy = max (0.0, cy);
2907         cy = min ((double) _line->height(), cy);
2908
2909         double const fraction = 1.0 - (cy / _line->height());
2910
2911         bool push;
2912
2913         if (Keyboard::modifier_state_contains (event->button.state, Keyboard::PrimaryModifier)) {
2914                 push = false;
2915         } else {
2916                 push = true;
2917         }
2918
2919         /* we are ignoring x position for this drag, so we can just pass in anything */
2920         _line->drag_motion (0, fraction, true, push);
2921
2922         _editor->set_verbose_canvas_cursor_text (_line->get_verbose_cursor_string (fraction));
2923 }
2924
2925 void
2926 LineDrag::finished (GdkEvent* event, bool)
2927 {
2928         motion (event, false);
2929         _line->end_drag ();
2930 }
2931
2932 void
2933 LineDrag::aborted ()
2934 {
2935         _line->reset ();
2936 }
2937
2938 FeatureLineDrag::FeatureLineDrag (Editor* e, ArdourCanvas::Item* i)
2939         : Drag (e, i),
2940           _line (0),
2941           _cumulative_x_drag (0)
2942 {
2943
2944 }
2945 void
2946 FeatureLineDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
2947 {
2948
2949         Drag::start_grab (event);
2950
2951         _line = reinterpret_cast<SimpleLine*> (_item);
2952         assert (_line);
2953
2954         /* need to get x coordinate in terms of parent (AudioRegionView) origin. */
2955
2956         double cx = event->button.x;
2957         double cy = event->button.y;
2958
2959         _item->property_parent().get_value()->w2i(cx, cy);
2960
2961         /* store grab start in parent frame */
2962         _region_view_grab_x = cx;
2963
2964         _before = _line->property_x1();
2965
2966         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
2967
2968         _max_x = _editor->frame_to_pixel(_arv->get_duration());
2969 }
2970
2971 void
2972 FeatureLineDrag::motion (GdkEvent* event, bool)
2973 {
2974         double dx = _drags->current_pointer_x() - last_pointer_x();
2975
2976         double cx = _region_view_grab_x + _cumulative_x_drag + dx;
2977
2978         _cumulative_x_drag += dx;
2979
2980         /* Clamp the min and max extent of the drag to keep it within the region view bounds */
2981
2982         if (cx > _max_x){
2983                 cx = _max_x;
2984         }
2985         else if(cx < 0){
2986                 cx = 0;
2987         }
2988
2989         _line->property_x1() = cx;
2990         _line->property_x2() = cx;
2991
2992         _before = _line->property_x1();
2993 }
2994
2995 void
2996 FeatureLineDrag::finished (GdkEvent* event, bool)
2997 {
2998         _arv = reinterpret_cast<AudioRegionView*> (_item->get_data ("regionview"));
2999         _arv->update_transient(_before, _line->property_x1());
3000 }
3001
3002 void
3003 FeatureLineDrag::aborted ()
3004 {
3005         //_line->reset ();
3006 }
3007
3008 void
3009 RubberbandSelectDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3010 {
3011         Drag::start_grab (event);
3012         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3013 }
3014
3015 void
3016 RubberbandSelectDrag::motion (GdkEvent* event, bool)
3017 {
3018         nframes64_t start;
3019         nframes64_t end;
3020         double y1;
3021         double y2;
3022
3023         nframes64_t const pf = adjusted_current_frame (event, Config->get_rubberbanding_snaps_to_grid ());
3024
3025         nframes64_t grab = grab_frame ();
3026         if (Config->get_rubberbanding_snaps_to_grid ()) {
3027                 _editor->snap_to_with_modifier (grab, event);
3028         }
3029
3030         /* base start and end on initial click position */
3031
3032         if (pf < grab) {
3033                 start = pf;
3034                 end = grab;
3035         } else {
3036                 end = pf;
3037                 start = grab;
3038         }
3039
3040         if (_drags->current_pointer_y() < grab_y()) {
3041                 y1 = _drags->current_pointer_y();
3042                 y2 = grab_y();
3043         } else {
3044                 y2 = _drags->current_pointer_y();
3045                 y1 = grab_y();
3046         }
3047
3048
3049         if (start != end || y1 != y2) {
3050
3051                 double x1 = _editor->frame_to_pixel (start);
3052                 double x2 = _editor->frame_to_pixel (end);
3053
3054                 _editor->rubberband_rect->property_x1() = x1;
3055                 _editor->rubberband_rect->property_y1() = y1;
3056                 _editor->rubberband_rect->property_x2() = x2;
3057                 _editor->rubberband_rect->property_y2() = y2;
3058
3059                 _editor->rubberband_rect->show();
3060                 _editor->rubberband_rect->raise_to_top();
3061
3062                 _editor->show_verbose_time_cursor (pf, 10);
3063         }
3064 }
3065
3066 void
3067 RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
3068 {
3069         if (movement_occurred) {
3070
3071                 motion (event, false);
3072
3073                 double y1,y2;
3074                 if (_drags->current_pointer_y() < grab_y()) {
3075                         y1 = _drags->current_pointer_y();
3076                         y2 = grab_y();
3077                 } else {
3078                         y2 = _drags->current_pointer_y();
3079                         y1 = grab_y();
3080                 }
3081
3082
3083                 Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
3084                 bool committed;
3085
3086                 _editor->begin_reversible_command (_("rubberband selection"));
3087
3088                 if (grab_frame() < last_pointer_frame()) {
3089                         committed = _editor->select_all_within (grab_frame(), last_pointer_frame() - 1, y1, y2, _editor->track_views, op);
3090                 } else {
3091                         committed = _editor->select_all_within (last_pointer_frame(), grab_frame() - 1, y1, y2, _editor->track_views, op);
3092                 }
3093
3094                 if (!committed) {
3095                         _editor->commit_reversible_command ();
3096                 }
3097
3098         } else {
3099                 if (!getenv("ARDOUR_SAE")) {
3100                         _editor->selection->clear_tracks();
3101                 }
3102                 _editor->selection->clear_regions();
3103                 _editor->selection->clear_points ();
3104                 _editor->selection->clear_lines ();
3105         }
3106
3107         _editor->rubberband_rect->hide();
3108 }
3109
3110 void
3111 RubberbandSelectDrag::aborted ()
3112 {
3113         _editor->rubberband_rect->hide ();
3114 }
3115
3116 void
3117 TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3118 {
3119         Drag::start_grab (event);
3120
3121         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3122 }
3123
3124 void
3125 TimeFXDrag::motion (GdkEvent* event, bool)
3126 {
3127         RegionView* rv = _primary;
3128
3129         nframes64_t const pf = adjusted_current_frame (event);
3130
3131         if (pf > rv->region()->position()) {
3132                 rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf);
3133         }
3134
3135         _editor->show_verbose_time_cursor (pf, 10);
3136 }
3137
3138 void
3139 TimeFXDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3140 {
3141         _primary->get_time_axis_view().hide_timestretch ();
3142
3143         if (!movement_occurred) {
3144                 return;
3145         }
3146
3147         if (last_pointer_frame() < _primary->region()->position()) {
3148                 /* backwards drag of the left edge - not usable */
3149                 return;
3150         }
3151
3152         nframes64_t newlen = last_pointer_frame() - _primary->region()->position();
3153
3154         float percentage = (double) newlen / (double) _primary->region()->length();
3155
3156 #ifndef USE_RUBBERBAND
3157         // Soundtouch uses percentage / 100 instead of normal (/ 1)
3158         if (_primary->region()->data_type() == DataType::AUDIO) {
3159                 percentage = (float) ((double) newlen - (double) _primary->region()->length()) / ((double) newlen) * 100.0f;
3160         }
3161 #endif
3162
3163         _editor->begin_reversible_command (_("timestretch"));
3164
3165         // XXX how do timeFX on multiple regions ?
3166
3167         RegionSelection rs;
3168         rs.add (_primary);
3169
3170         if (_editor->time_stretch (rs, percentage) == -1) {
3171                 error << _("An error occurred while executing time stretch operation") << endmsg;
3172         }
3173 }
3174
3175 void
3176 TimeFXDrag::aborted ()
3177 {
3178         _primary->get_time_axis_view().hide_timestretch ();
3179 }
3180
3181
3182 void
3183 ScrubDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3184 {
3185         Drag::start_grab (event);
3186 }
3187
3188 void
3189 ScrubDrag::motion (GdkEvent* /*event*/, bool)
3190 {
3191         _editor->scrub (adjusted_current_frame (0, false), _drags->current_pointer_x ());
3192 }
3193
3194 void
3195 ScrubDrag::finished (GdkEvent* /*event*/, bool movement_occurred)
3196 {
3197         if (movement_occurred && _editor->session()) {
3198                 /* make sure we stop */
3199                 _editor->session()->request_transport_speed (0.0);
3200         }
3201 }
3202
3203 void
3204 ScrubDrag::aborted ()
3205 {
3206         /* XXX: TODO */
3207 }
3208
3209 SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3210         : Drag (e, i)
3211         , _operation (o)
3212         , _copy (false)
3213         , _original_pointer_time_axis (-1)
3214         , _last_pointer_time_axis (-1)
3215 {
3216
3217 }
3218
3219 void
3220 SelectionDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
3221 {
3222         nframes64_t start = 0;
3223         nframes64_t end = 0;
3224
3225         if (_editor->session() == 0) {
3226                 return;
3227         }
3228
3229         Gdk::Cursor* cursor = 0;
3230
3231         switch (_operation) {
3232         case CreateSelection:
3233                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3234                         _copy = true;
3235                 } else {
3236                         _copy = false;
3237                 }
3238                 cursor = _editor->selector_cursor;
3239                 Drag::start_grab (event, cursor);
3240                 break;
3241
3242         case SelectionStartTrim:
3243                 if (_editor->clicked_axisview) {
3244                         _editor->clicked_axisview->order_selection_trims (_item, true);
3245                 }
3246                 Drag::start_grab (event, _editor->left_side_trim_cursor);
3247                 start = _editor->selection->time[_editor->clicked_selection].start;
3248                 _pointer_frame_offset = grab_frame() - start;
3249                 break;
3250
3251         case SelectionEndTrim:
3252                 if (_editor->clicked_axisview) {
3253                         _editor->clicked_axisview->order_selection_trims (_item, false);
3254                 }
3255                 Drag::start_grab (event, _editor->right_side_trim_cursor);
3256                 end = _editor->selection->time[_editor->clicked_selection].end;
3257                 _pointer_frame_offset = grab_frame() - end;
3258                 break;
3259
3260         case SelectionMove:
3261                 start = _editor->selection->time[_editor->clicked_selection].start;
3262                 Drag::start_grab (event, cursor);
3263                 _pointer_frame_offset = grab_frame() - start;
3264                 break;
3265         }
3266
3267         if (_operation == SelectionMove) {
3268                 _editor->show_verbose_time_cursor (start, 10);
3269         } else {
3270                 _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3271         }
3272
3273         _original_pointer_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ()).first->order ();
3274 }
3275
3276 void
3277 SelectionDrag::motion (GdkEvent* event, bool first_move)
3278 {
3279         nframes64_t start = 0;
3280         nframes64_t end = 0;
3281         nframes64_t length;
3282
3283         pair<TimeAxisView*, int> const pending_time_axis = _editor->trackview_by_y_position (_drags->current_pointer_y ());
3284         if (pending_time_axis.first == 0) {
3285                 return;
3286         }
3287
3288         nframes64_t const pending_position = adjusted_current_frame (event);
3289
3290         /* only alter selection if things have changed */
3291
3292         if (pending_time_axis.first->order() == _last_pointer_time_axis && pending_position == last_pointer_frame()) {
3293                 return;
3294         }
3295
3296         switch (_operation) {
3297         case CreateSelection:
3298         {
3299                 nframes64_t grab = grab_frame ();
3300
3301                 if (first_move) {
3302                         _editor->snap_to (grab);
3303                 }
3304
3305                 if (pending_position < grab_frame()) {
3306                         start = pending_position;
3307                         end = grab;
3308                 } else {
3309                         end = pending_position;
3310                         start = grab;
3311                 }
3312
3313                 /* first drag: Either add to the selection
3314                    or create a new selection
3315                 */
3316
3317                 if (first_move) {
3318
3319                         if (_copy) {
3320                                 /* adding to the selection */
3321                                 _editor->selection->add (_editor->clicked_axisview);
3322                                 _editor->clicked_selection = _editor->selection->add (start, end);
3323                                 _copy = false;
3324                         } else {
3325                                 /* new selection */
3326
3327                                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3328                                         _editor->selection->set (_editor->clicked_axisview);
3329                                 }
3330
3331                                 _editor->clicked_selection = _editor->selection->set (start, end);
3332                         }
3333                 }
3334
3335                 /* select the track that we're in */
3336                 if (find (_added_time_axes.begin(), _added_time_axes.end(), pending_time_axis.first) == _added_time_axes.end()) {
3337                         _editor->selection->add (pending_time_axis.first);
3338                         _added_time_axes.push_back (pending_time_axis.first);
3339                 }
3340
3341                 /* deselect any tracks that this drag no longer includes, being careful to only deselect
3342                    tracks that we selected in the first place.
3343                 */
3344
3345                 int min_order = min (_original_pointer_time_axis, pending_time_axis.first->order());
3346                 int max_order = max (_original_pointer_time_axis, pending_time_axis.first->order());
3347
3348                 list<TimeAxisView*>::iterator i = _added_time_axes.begin();
3349                 while (i != _added_time_axes.end()) {
3350
3351                         list<TimeAxisView*>::iterator tmp = i;
3352                         ++tmp;
3353
3354                         if ((*i)->order() < min_order || (*i)->order() > max_order) {
3355                                 _editor->selection->remove (*i);
3356                                 _added_time_axes.remove (*i);
3357                         }
3358
3359                         i = tmp;
3360                 }
3361
3362         }
3363         break;
3364
3365         case SelectionStartTrim:
3366
3367                 start = _editor->selection->time[_editor->clicked_selection].start;
3368                 end = _editor->selection->time[_editor->clicked_selection].end;
3369
3370                 if (pending_position > end) {
3371                         start = end;
3372                 } else {
3373                         start = pending_position;
3374                 }
3375                 break;
3376
3377         case SelectionEndTrim:
3378
3379                 start = _editor->selection->time[_editor->clicked_selection].start;
3380                 end = _editor->selection->time[_editor->clicked_selection].end;
3381
3382                 if (pending_position < start) {
3383                         end = start;
3384                 } else {
3385                         end = pending_position;
3386                 }
3387
3388                 break;
3389
3390         case SelectionMove:
3391
3392                 start = _editor->selection->time[_editor->clicked_selection].start;
3393                 end = _editor->selection->time[_editor->clicked_selection].end;
3394
3395                 length = end - start;
3396
3397                 start = pending_position;
3398                 _editor->snap_to (start);
3399
3400                 end = start + length;
3401
3402                 break;
3403         }
3404
3405         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3406                 _editor->start_canvas_autoscroll (1, 0);
3407         }
3408
3409         if (start != end) {
3410                 _editor->selection->replace (_editor->clicked_selection, start, end);
3411         }
3412
3413         if (_operation == SelectionMove) {
3414                 _editor->show_verbose_time_cursor(start, 10);
3415         } else {
3416                 _editor->show_verbose_time_cursor(pending_position, 10);
3417         }
3418 }
3419
3420 void
3421 SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
3422 {
3423         Session* s = _editor->session();
3424
3425         if (movement_occurred) {
3426                 motion (event, false);
3427                 /* XXX this is not object-oriented programming at all. ick */
3428                 if (_editor->selection->time.consolidate()) {
3429                         _editor->selection->TimeChanged ();
3430                 }
3431
3432                 /* XXX what if its a music time selection? */
3433                 if (s && (s->config.get_auto_play() || (s->get_play_range() && s->transport_rolling()))) {
3434                         s->request_play_range (&_editor->selection->time, true);
3435                 }
3436
3437
3438         } else {
3439                 /* just a click, no pointer movement.*/
3440
3441                 if (Keyboard::no_modifier_keys_pressed (&event->button)) {
3442                         _editor->selection->clear_time();
3443                 }
3444
3445                 if (_editor->clicked_axisview && !_editor->selection->selected (_editor->clicked_axisview)) {
3446                         _editor->selection->set (_editor->clicked_axisview);
3447                 }
3448
3449                 if (s && s->get_play_range () && s->transport_rolling()) {
3450                         s->request_stop (false, false);
3451                 }
3452
3453         }
3454
3455         _editor->stop_canvas_autoscroll ();
3456 }
3457
3458 void
3459 SelectionDrag::aborted ()
3460 {
3461         /* XXX: TODO */
3462 }
3463
3464 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
3465         : Drag (e, i),
3466           _operation (o),
3467           _copy (false)
3468 {
3469         _drag_rect = new ArdourCanvas::SimpleRect (*_editor->time_line_group, 0.0, 0.0, 0.0, _editor->physical_screen_height);
3470         _drag_rect->hide ();
3471
3472         _drag_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3473         _drag_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RangeDragRect.get();
3474 }
3475
3476 void
3477 RangeMarkerBarDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3478 {
3479         if (_editor->session() == 0) {
3480                 return;
3481         }
3482
3483         Gdk::Cursor* cursor = 0;
3484
3485         if (!_editor->temp_location) {
3486                 _editor->temp_location = new Location;
3487         }
3488
3489         switch (_operation) {
3490         case CreateRangeMarker:
3491         case CreateTransportMarker:
3492         case CreateCDMarker:
3493
3494                 if (Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier)) {
3495                         _copy = true;
3496                 } else {
3497                         _copy = false;
3498                 }
3499                 cursor = _editor->selector_cursor;
3500                 break;
3501         }
3502
3503         Drag::start_grab (event, cursor);
3504
3505         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3506 }
3507
3508 void
3509 RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
3510 {
3511         nframes64_t start = 0;
3512         nframes64_t end = 0;
3513         ArdourCanvas::SimpleRect *crect;
3514
3515         switch (_operation) {
3516         case CreateRangeMarker:
3517                 crect = _editor->range_bar_drag_rect;
3518                 break;
3519         case CreateTransportMarker:
3520                 crect = _editor->transport_bar_drag_rect;
3521                 break;
3522         case CreateCDMarker:
3523                 crect = _editor->cd_marker_bar_drag_rect;
3524                 break;
3525         default:
3526                 cerr << "Error: unknown range marker op passed to Editor::drag_range_markerbar_op ()" << endl;
3527                 return;
3528                 break;
3529         }
3530
3531         nframes64_t const pf = adjusted_current_frame (event);
3532
3533         if (_operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
3534                 nframes64_t grab = grab_frame ();
3535                 _editor->snap_to (grab);
3536
3537                 if (pf < grab_frame()) {
3538                         start = pf;
3539                         end = grab;
3540                 } else {
3541                         end = pf;
3542                         start = grab;
3543                 }
3544
3545                 /* first drag: Either add to the selection
3546                    or create a new selection.
3547                 */
3548
3549                 if (first_move) {
3550
3551                         _editor->temp_location->set (start, end);
3552
3553                         crect->show ();
3554
3555                         update_item (_editor->temp_location);
3556                         _drag_rect->show();
3557                         //_drag_rect->raise_to_top();
3558
3559                 }
3560         }
3561
3562         if (event->button.x >= _editor->horizontal_position() + _editor->_canvas_width) {
3563                 _editor->start_canvas_autoscroll (1, 0);
3564         }
3565
3566         if (start != end) {
3567                 _editor->temp_location->set (start, end);
3568
3569                 double x1 = _editor->frame_to_pixel (start);
3570                 double x2 = _editor->frame_to_pixel (end);
3571                 crect->property_x1() = x1;
3572                 crect->property_x2() = x2;
3573
3574                 update_item (_editor->temp_location);
3575         }
3576
3577         _editor->show_verbose_time_cursor (pf, 10);
3578
3579 }
3580
3581 void
3582 RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
3583 {
3584         Location * newloc = 0;
3585         string rangename;
3586         int flags;
3587
3588         if (movement_occurred) {
3589                 motion (event, false);
3590                 _drag_rect->hide();
3591
3592                 switch (_operation) {
3593                 case CreateRangeMarker:
3594                 case CreateCDMarker:
3595                     {
3596                         _editor->begin_reversible_command (_("new range marker"));
3597                         XMLNode &before = _editor->session()->locations()->get_state();
3598                         _editor->session()->locations()->next_available_name(rangename,"unnamed");
3599                         if (_operation == CreateCDMarker) {
3600                                 flags = Location::IsRangeMarker | Location::IsCDMarker;
3601                                 _editor->cd_marker_bar_drag_rect->hide();
3602                         }
3603                         else {
3604                                 flags = Location::IsRangeMarker;
3605                                 _editor->range_bar_drag_rect->hide();
3606                         }
3607                         newloc = new Location(_editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags);
3608                         _editor->session()->locations()->add (newloc, true);
3609                         XMLNode &after = _editor->session()->locations()->get_state();
3610                         _editor->session()->add_command(new MementoCommand<Locations>(*(_editor->session()->locations()), &before, &after));
3611                         _editor->commit_reversible_command ();
3612                         break;
3613                     }
3614
3615                 case CreateTransportMarker:
3616                         // popup menu to pick loop or punch
3617                         _editor->new_transport_marker_context_menu (&event->button, _item);
3618                         break;
3619                 }
3620         } else {
3621                 /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
3622
3623                 if (Keyboard::no_modifier_keys_pressed (&event->button) && _operation != CreateCDMarker) {
3624
3625                         nframes64_t start;
3626                         nframes64_t end;
3627
3628                         _editor->session()->locations()->marks_either_side (grab_frame(), start, end);
3629
3630                         if (end == max_frames) {
3631                                 end = _editor->session()->current_end_frame ();
3632                         }
3633
3634                         if (start == max_frames) {
3635                                 start = _editor->session()->current_start_frame ();
3636                         }
3637
3638                         switch (_editor->mouse_mode) {
3639                         case MouseObject:
3640                                 /* find the two markers on either side and then make the selection from it */
3641                                 _editor->select_all_within (start, end, 0.0f, FLT_MAX, _editor->track_views, Selection::Set);
3642                                 break;
3643
3644                         case MouseRange:
3645                                 /* find the two markers on either side of the click and make the range out of it */
3646                                 _editor->selection->set (start, end);
3647                                 break;
3648
3649                         default:
3650                                 break;
3651                         }
3652                 }
3653         }
3654
3655         _editor->stop_canvas_autoscroll ();
3656 }
3657
3658 void
3659 RangeMarkerBarDrag::aborted ()
3660 {
3661         /* XXX: TODO */
3662 }
3663
3664 void
3665 RangeMarkerBarDrag::update_item (Location* location)
3666 {
3667         double const x1 = _editor->frame_to_pixel (location->start());
3668         double const x2 = _editor->frame_to_pixel (location->end());
3669
3670         _drag_rect->property_x1() = x1;
3671         _drag_rect->property_x2() = x2;
3672 }
3673
3674 void
3675 MouseZoomDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3676 {
3677         Drag::start_grab (event, _editor->zoom_cursor);
3678         _editor->show_verbose_time_cursor (adjusted_current_frame (event), 10);
3679 }
3680
3681 void
3682 MouseZoomDrag::motion (GdkEvent* event, bool first_move)
3683 {
3684         nframes64_t start;
3685         nframes64_t end;
3686
3687         nframes64_t const pf = adjusted_current_frame (event);
3688
3689         nframes64_t grab = grab_frame ();
3690         _editor->snap_to_with_modifier (grab, event);
3691
3692         /* base start and end on initial click position */
3693         if (pf < grab) {
3694                 start = pf;
3695                 end = grab;
3696         } else {
3697                 end = pf;
3698                 start = grab;
3699         }
3700
3701         if (start != end) {
3702
3703                 if (first_move) {
3704                         _editor->zoom_rect->show();
3705                         _editor->zoom_rect->raise_to_top();
3706                 }
3707
3708                 _editor->reposition_zoom_rect(start, end);
3709
3710                 _editor->show_verbose_time_cursor (pf, 10);
3711         }
3712 }
3713
3714 void
3715 MouseZoomDrag::finished (GdkEvent* event, bool movement_occurred)
3716 {
3717         if (movement_occurred) {
3718                 motion (event, false);
3719
3720                 if (grab_frame() < last_pointer_frame()) {
3721                         _editor->temporal_zoom_by_frame (grab_frame(), last_pointer_frame(), "mouse zoom");
3722                 } else {
3723                         _editor->temporal_zoom_by_frame (last_pointer_frame(), grab_frame(), "mouse zoom");
3724                 }
3725         } else {
3726                 _editor->temporal_zoom_to_frame (false, grab_frame());
3727                 /*
3728                 temporal_zoom_step (false);
3729                 center_screen (grab_frame());
3730                 */
3731         }
3732
3733         _editor->zoom_rect->hide();
3734 }
3735
3736 void
3737 MouseZoomDrag::aborted ()
3738 {
3739         _editor->zoom_rect->hide ();
3740 }
3741
3742 NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
3743         : Drag (e, i)
3744 {
3745         CanvasNoteEvent*     cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3746         region = &cnote->region_view();
3747 }
3748
3749 void
3750 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
3751 {
3752         Drag::start_grab (event);
3753
3754         drag_delta_x = 0;
3755         drag_delta_note = 0;
3756
3757         double event_x;
3758         double event_y;
3759
3760         event_x = _drags->current_pointer_x();
3761         event_y = _drags->current_pointer_y();
3762
3763         _item->property_parent().get_value()->w2i(event_x, event_y);
3764
3765         last_x = region->snap_to_pixel(event_x);
3766         last_y = event_y;
3767
3768         CanvasNoteEvent* cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3769
3770         if (!(was_selected = cnote->selected())) {
3771
3772                 /* tertiary-click means extend selection - we'll do that on button release,
3773                    so don't add it here, because otherwise we make it hard to figure
3774                    out the "extend-to" range.
3775                 */
3776
3777                 bool extend = Keyboard::modifier_state_equals (event->button.state, Keyboard::TertiaryModifier);
3778
3779                 if (!extend) {
3780                         bool add = Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier);
3781
3782                         if (add) {
3783                                 region->note_selected (cnote, true);
3784                         } else {
3785                                 region->unique_select (cnote);
3786                         }
3787                 }
3788         }
3789 }
3790
3791 void
3792 NoteDrag::motion (GdkEvent*, bool)
3793 {
3794         MidiStreamView* streamview = region->midi_stream_view();
3795         double event_x;
3796         double event_y;
3797
3798         event_x = _drags->current_pointer_x();
3799         event_y = _drags->current_pointer_y();
3800
3801         _item->property_parent().get_value()->w2i(event_x, event_y);
3802
3803         event_x = region->snap_to_pixel(event_x);
3804
3805         double dx     = event_x - last_x;
3806         double dy     = event_y - last_y;
3807         last_x = event_x;
3808
3809         drag_delta_x += dx;
3810
3811         // Snap to note rows
3812
3813         if (abs (dy) < streamview->note_height()) {
3814                 dy = 0.0;
3815         } else {
3816                 int8_t this_delta_note;
3817                 if (dy > 0) {
3818                         this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
3819                 } else {
3820                         this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
3821                 }
3822                 drag_delta_note -= this_delta_note;
3823                 dy = streamview->note_height() * this_delta_note;
3824                 last_y = last_y + dy;
3825         }
3826
3827         if (dx || dy) {
3828
3829                 CanvasNoteEvent* cnote = dynamic_cast<CanvasNoteEvent*>(_item);
3830                 Evoral::MusicalTime new_time;
3831
3832                 if (drag_delta_x) {
3833                         nframes64_t start_frames = region->beats_to_frames(cnote->note()->time());
3834                         if (drag_delta_x >= 0) {
3835                                 start_frames += region->snap_frame_to_frame(_editor->pixel_to_frame(drag_delta_x));
3836                         } else {
3837                                 start_frames -= region->snap_frame_to_frame(_editor->pixel_to_frame(-drag_delta_x));
3838                         }
3839                         new_time = region->frames_to_beats(start_frames);
3840                 } else {
3841                         new_time = cnote->note()->time();
3842                 }
3843
3844                 boost::shared_ptr<Evoral::Note<Evoral::MusicalTime> > check_note (
3845                         new Evoral::Note<Evoral::MusicalTime> (cnote->note()->channel(),
3846                                                                new_time,
3847                                                                cnote->note()->length(),
3848                                                                cnote->note()->note() + drag_delta_note,
3849                                                                cnote->note()->velocity()));
3850
3851                 region->move_selection (dx, dy);
3852
3853                 char buf[12];
3854                 snprintf (buf, sizeof (buf), "%s (%d)", Evoral::midi_note_name (cnote->note()->note()).c_str(),
3855                           (int) floor ((cnote->note()->note() + drag_delta_note)));
3856                 _editor->show_verbose_canvas_cursor_with (buf);
3857         }
3858 }
3859
3860 void
3861 NoteDrag::finished (GdkEvent* ev, bool moved)
3862 {
3863         ArdourCanvas::CanvasNote* cnote = dynamic_cast<ArdourCanvas::CanvasNote*>(_item);
3864
3865         if (!moved) {
3866                 if (_editor->current_mouse_mode() == Editing::MouseObject) {
3867
3868                         if (was_selected) {
3869                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
3870                                 if (add) {
3871                                         region->note_deselected (cnote);
3872                                 }
3873                         } else {
3874                                 bool extend = Keyboard::modifier_state_equals (ev->button.state, Keyboard::TertiaryModifier);
3875                                 bool add = Keyboard::modifier_state_equals (ev->button.state, Keyboard::PrimaryModifier);
3876
3877                                 if (!extend && !add && region->selection_size() > 1) {
3878                                         region->unique_select(cnote);
3879                                 } else if (extend) {
3880                                         region->note_selected (cnote, true, true);
3881                                 } else {
3882                                         /* it was added during button press */
3883                                 }
3884                         }
3885                 }
3886         } else {
3887                 region->note_dropped (cnote, drag_delta_x, drag_delta_note);
3888         }
3889 }
3890
3891 void
3892 NoteDrag::aborted ()
3893 {
3894         /* XXX: TODO */
3895 }
3896
3897 AutomationRangeDrag::AutomationRangeDrag (Editor* e, ArdourCanvas::Item* i, list<AudioRange> const & r)
3898         : Drag (e, i)
3899         , _ranges (r)
3900         , _nothing_to_drag (false)
3901 {
3902         _atav = reinterpret_cast<AutomationTimeAxisView*> (_item->get_data ("trackview"));
3903         assert (_atav);
3904
3905         _line = _atav->line ();
3906 }
3907
3908 void
3909 AutomationRangeDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
3910 {
3911         Drag::start_grab (event, cursor);
3912
3913         list<ControlPoint*> points;
3914
3915         XMLNode* state = &_line->get_state ();
3916
3917         if (_ranges.empty()) {
3918
3919                 uint32_t const N = _line->npoints ();
3920                 for (uint32_t i = 0; i < N; ++i) {
3921                         points.push_back (_line->nth (i));
3922                 }
3923
3924         } else {
3925
3926                 boost::shared_ptr<AutomationList> the_list = _line->the_list ();
3927                 for (list<AudioRange>::const_iterator j = _ranges.begin(); j != _ranges.end(); ++j) {
3928
3929                         /* fade into and out of the region that we're dragging;
3930                            64 samples length plucked out of thin air.
3931                         */
3932                         nframes64_t const h = (j->start + j->end) / 2;
3933                         nframes64_t a = j->start + 64;
3934                         if (a > h) {
3935                                 a = h;
3936                         }
3937                         nframes64_t b = j->end - 64;
3938                         if (b < h) {
3939                                 b = h;
3940                         }
3941
3942                         the_list->add (j->start, the_list->eval (j->start));
3943                         _line->add_always_in_view (j->start);
3944                         the_list->add (a, the_list->eval (a));
3945                         _line->add_always_in_view (a);
3946                         the_list->add (b, the_list->eval (b));
3947                         _line->add_always_in_view (b);
3948                         the_list->add (j->end, the_list->eval (j->end));
3949                         _line->add_always_in_view (j->end);
3950                 }
3951
3952                 uint32_t const N = _line->npoints ();
3953                 for (uint32_t i = 0; i < N; ++i) {
3954
3955                         ControlPoint* p = _line->nth (i);
3956
3957                         list<AudioRange>::const_iterator j = _ranges.begin ();
3958                         while (j != _ranges.end() && (j->start >= (*p->model())->when || j->end <= (*p->model())->when)) {
3959                                 ++j;
3960                         }
3961
3962                         if (j != _ranges.end()) {
3963                                 points.push_back (p);
3964                         }
3965                 }
3966         }
3967
3968         if (points.empty()) {
3969                 _nothing_to_drag = true;
3970                 return;
3971         }
3972
3973         _line->start_drag_multiple (points, 1 - (_drags->current_pointer_y() / _line->height ()), state);
3974 }
3975
3976 void
3977 AutomationRangeDrag::motion (GdkEvent* event, bool first_move)
3978 {
3979         if (_nothing_to_drag) {
3980                 return;
3981         }
3982
3983         float const f = 1 - (_drags->current_pointer_y() / _line->height());
3984
3985         /* we are ignoring x position for this drag, so we can just pass in anything */
3986         _line->drag_motion (0, f, true, false);
3987 }
3988
3989 void
3990 AutomationRangeDrag::finished (GdkEvent* event, bool)
3991 {
3992         if (_nothing_to_drag) {
3993                 return;
3994         }
3995
3996         motion (event, false);
3997         _line->end_drag ();
3998         _line->clear_always_in_view ();
3999 }
4000
4001 void
4002 AutomationRangeDrag::aborted ()
4003 {
4004         _line->clear_always_in_view ();
4005         _line->reset ();
4006 }
4007
4008 DraggingView::DraggingView (RegionView* v)
4009         : view (v)
4010 {
4011         initial_y = v->get_canvas_group()->property_y ();
4012 }