gtk2_ardour/editor_drag.h

   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 #ifndef __gtk2_ardour_editor_drag_h_
  21 #define __gtk2_ardour_editor_drag_h_
  22
  23 #include <list>
  24
  25 #include <gdk/gdk.h>
  26 #include <stdint.h>
  27
  28 #include "ardour/types.h"
  29
  30 #include "canvas.h"
  31 #include "editor_items.h"
  32
  33 namespace ARDOUR {
  34         class Location;
  35 }
  36
  37 namespace PBD {
  38         class StatefulDiffCommand;
  39 }
  40
  41 namespace Gnome {
  42         namespace Canvas {
  43                 class CanvasNoteEvent;
  44                 class CanvasPatchChange;
  45         }
  46 }
  47
  48 class Editor;
  49 class EditorCursor;
  50 class TimeAxisView;
  51 class MidiTimeAxisView;
  52 class Drag;
  53
  54 /** Class to manage current drags */
  55 class DragManager
  56 {
  57 public:
  58
  59         DragManager (Editor* e);
  60         ~DragManager ();
  61
  62         bool motion_handler (GdkEvent *, bool);
  63
  64         void abort ();
  65         void add (Drag *);
  66         void set (Drag *, GdkEvent *, Gdk::Cursor* c = 0);
  67         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
  68         bool end_grab (GdkEvent *);
  69         bool have_item (ArdourCanvas::Item *) const;
  70
  71         /** @return true if an end drag or abort is in progress */
  72         bool ending () const {
  73                 return _ending;
  74         }
  75
  76         bool active () const {
  77                 return !_drags.empty ();
  78         }
  79
  80         /** @return current pointer x position in trackview coordinates */
  81         double current_pointer_x () const {
  82                 return _current_pointer_x;
  83         }
  84
  85         /** @return current pointer y position in trackview coordinates */
  86         double current_pointer_y () const {
  87                 return _current_pointer_y;
  88         }
  89
  90         /** @return current pointer frame */
  91         ARDOUR::framepos_t current_pointer_frame () const {
  92                 return _current_pointer_frame;
  93         }
  94
  95 private:
  96         Editor* _editor;
  97         std::list<Drag*> _drags;
  98         bool _ending; ///< true if end_grab or abort is in progress, otherwise false
  99         double _current_pointer_x; ///< trackview x of the current pointer
 100         double _current_pointer_y; ///< trackview y of the current pointer
 101         ARDOUR::framepos_t _current_pointer_frame; ///< frame that the pointer is now at
 102         bool _old_follow_playhead; ///< state of Editor::follow_playhead() before the drags started
 103 };
 104
 105 /** Abstract base class for dragging of things within the editor */
 106 class Drag
 107 {
 108 public:
 109         Drag (Editor *, ArdourCanvas::Item *);
 110         virtual ~Drag () {}
 111
 112         void set_manager (DragManager* m) {
 113                 _drags = m;
 114         }
 115
 116         /** @return the canvas item being dragged */
 117         ArdourCanvas::Item* item () const {
 118                 return _item;
 119         }
 120
 121         void swap_grab (ArdourCanvas::Item *, Gdk::Cursor *, uint32_t);
 122         bool motion_handler (GdkEvent*, bool);
 123         void abort ();
 124
 125         ARDOUR::framepos_t adjusted_frame (ARDOUR::framepos_t, GdkEvent const *, bool snap = true) const;
 126         ARDOUR::framepos_t adjusted_current_frame (GdkEvent const *, bool snap = true) const;
 127
 128         /** Called to start a grab of an item.
 129          *  @param e Event that caused the grab to start.
 130          *  @param c Cursor to use, or 0.
 131          */
 132         virtual void start_grab (GdkEvent* e, Gdk::Cursor* c = 0);
 133
 134         virtual bool end_grab (GdkEvent *);
 135
 136         /** Called when a drag motion has occurred.
 137          *  @param e Event describing the motion.
 138          *  @param f true if this is the first movement, otherwise false.
 139          */
 140         virtual void motion (GdkEvent* e, bool f) = 0;
 141
 142         /** Called when a drag has finished.
 143          *  @param e Event describing the finish.
 144          *  @param m true if some movement occurred, otherwise false.
 145          */
 146         virtual void finished (GdkEvent* e, bool m) = 0;
 147
 148         /** Called to abort a drag and return things to how
 149          *  they were before it started.
 150          *  @param m true if some movement occurred, otherwise false.
 151          */
 152         virtual void aborted (bool m) = 0;
 153
 154         /** @param m Mouse mode.
 155          *  @return true if this drag should happen in this mouse mode.
 156          */
 157         virtual bool active (Editing::MouseMode m) {
 158                 return (m != Editing::MouseGain);
 159         }
 160
 161         /** @return minimum number of frames (in x) and pixels (in y) that should be considered a movement */
 162         virtual std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
 163                 return std::make_pair (1, 1);
 164         }
 165
 166         virtual bool allow_vertical_autoscroll () const {
 167                 return true;
 168         }
 169
 170         /** @return true if x movement matters to this drag */
 171         virtual bool x_movement_matters () const {
 172                 return true;
 173         }
 174
 175         /** @return true if y movement matters to this drag */
 176         virtual bool y_movement_matters () const {
 177                 return true;
 178         }
 179
 180         /** Set up the _pointer_frame_offset */
 181         virtual void setup_pointer_frame_offset () {
 182                 _pointer_frame_offset = 0;
 183         }
 184
 185 protected:
 186
 187         double grab_x () const {
 188                 return _grab_x;
 189         }
 190
 191         double grab_y () const {
 192                 return _grab_y;
 193         }
 194
 195         ARDOUR::framepos_t raw_grab_frame () const {
 196                 return _raw_grab_frame;
 197         }
 198
 199         ARDOUR::framepos_t grab_frame () const {
 200                 return _grab_frame;
 201         }
 202
 203         double last_pointer_x () const {
 204                 return _last_pointer_x;
 205         }
 206
 207         double last_pointer_y () const {
 208                 return _last_pointer_y;
 209         }
 210
 211         double last_pointer_frame () const {
 212                 return _last_pointer_frame;
 213         }
 214
 215         void show_verbose_cursor_time (framepos_t);
 216         void show_verbose_cursor_duration (framepos_t, framepos_t, double xoffset = 0);
 217         void show_verbose_cursor_text (std::string const &);
 218
 219         Editor* _editor; ///< our editor
 220         DragManager* _drags;
 221         ArdourCanvas::Item* _item; ///< our item
 222         /** Offset from the mouse's position for the drag to the start of the thing that is being dragged */
 223         ARDOUR::framecnt_t _pointer_frame_offset;
 224         bool _x_constrained; ///< true if x motion is constrained, otherwise false
 225         bool _y_constrained; ///< true if y motion is constrained, otherwise false
 226         bool _was_rolling; ///< true if the session was rolling before the drag started, otherwise false
 227
 228 private:
 229
 230         bool _move_threshold_passed; ///< true if the move threshold has been passed, otherwise false
 231         double _grab_x; ///< trackview x of the grab start position
 232         double _grab_y; ///< trackview y of the grab start position
 233         double _last_pointer_x; ///< trackview x of the pointer last time a motion occurred
 234         double _last_pointer_y; ///< trackview y of the pointer last time a motion occurred
 235         ARDOUR::framepos_t _raw_grab_frame; ///< unsnapped frame that the mouse was at when start_grab was called, or 0
 236         ARDOUR::framepos_t _grab_frame; ///< adjusted_frame that the mouse was at when start_grab was called, or 0
 237         ARDOUR::framepos_t _last_pointer_frame; ///< adjusted_frame the last time a motion occurred
 238 };
 239
 240 class RegionDrag;
 241
 242 /** Container for details about a region being dragged */
 243 struct DraggingView
 244 {
 245         DraggingView (RegionView *, RegionDrag *);
 246
 247         RegionView* view; ///< the view
 248         /** index into RegionDrag::_time_axis_views of the view that this region is currently beind displayed on */
 249         int time_axis_view;
 250         /** layer that this region is currently being displayed on */
 251         ARDOUR::layer_t layer;
 252         double initial_y; ///< the initial y position of the view before any reparenting
 253         framepos_t initial_position; ///< initial position of the region
 254         framepos_t initial_end; ///< initial end position of the region
 255         boost::shared_ptr<ARDOUR::Playlist> initial_playlist;
 256 };
 257
 258 /** Abstract base class for drags that involve region(s) */
 259 class RegionDrag : public Drag, public sigc::trackable
 260 {
 261 public:
 262         RegionDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &);
 263         virtual ~RegionDrag () {}
 264
 265 protected:
 266
 267         RegionView* _primary; ///< the view that was clicked on (or whatever) to start the drag
 268         std::list<DraggingView> _views; ///< information about all views that are being dragged
 269
 270         /** a list of the non-hidden TimeAxisViews sorted by editor order key */
 271         std::vector<TimeAxisView*> _time_axis_views;
 272         int find_time_axis_view (TimeAxisView *) const;
 273
 274         int _visible_y_low;
 275         int _visible_y_high;
 276
 277         friend class DraggingView;
 278
 279 private:
 280
 281         void region_going_away (RegionView *);
 282         PBD::ScopedConnection death_connection;
 283 };
 284
 285
 286 /** Drags involving region motion from somewhere */
 287 class RegionMotionDrag : public RegionDrag
 288 {
 289 public:
 290
 291         RegionMotionDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &, bool);
 292         virtual ~RegionMotionDrag () {}
 293
 294         virtual void start_grab (GdkEvent *, Gdk::Cursor *);
 295         virtual void motion (GdkEvent *, bool);
 296         virtual void finished (GdkEvent *, bool) = 0;
 297         virtual void aborted (bool);
 298
 299         /** @return true if the regions being `moved' came from somewhere on the canvas;
 300          *  false if they came from outside (e.g. from the region list).
 301          */
 302         virtual bool regions_came_from_canvas () const = 0;
 303
 304 protected:
 305
 306         double compute_x_delta (GdkEvent const *, ARDOUR::framecnt_t *);
 307         bool y_movement_allowed (int, ARDOUR::layer_t) const;
 308
 309         bool _brushing;
 310         ARDOUR::framepos_t _last_frame_position; ///< last position of the thing being dragged
 311         double _total_x_delta;
 312         int _last_pointer_time_axis_view;
 313         ARDOUR::layer_t _last_pointer_layer;
 314 };
 315
 316
 317 /** Drags to move (or copy) regions that are already shown in the GUI to
 318  *  somewhere different.
 319  */
 320 class RegionMoveDrag : public RegionMotionDrag
 321 {
 322 public:
 323         RegionMoveDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &, bool, bool);
 324         virtual ~RegionMoveDrag () {}
 325
 326         void motion (GdkEvent *, bool);
 327         void finished (GdkEvent *, bool);
 328         void aborted (bool);
 329
 330         bool regions_came_from_canvas () const {
 331                 return true;
 332         }
 333
 334         std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
 335                 return std::make_pair (4, 4);
 336         }
 337
 338         void setup_pointer_frame_offset ();
 339
 340 private:
 341         typedef std::set<boost::shared_ptr<ARDOUR::Playlist> > PlaylistSet;
 342
 343         void finished_no_copy (
 344                 bool const,
 345                 bool const,
 346                 ARDOUR::framecnt_t const
 347                 );
 348
 349         void finished_copy (
 350                 bool const,
 351                 bool const,
 352                 ARDOUR::framecnt_t const
 353                 );
 354
 355         RegionView* insert_region_into_playlist (
 356                 boost::shared_ptr<ARDOUR::Region>,
 357                 RouteTimeAxisView*,
 358                 ARDOUR::layer_t,
 359                 ARDOUR::framecnt_t,
 360                 PlaylistSet&
 361                 );
 362
 363         void remove_region_from_playlist (
 364                 boost::shared_ptr<ARDOUR::Region>,
 365                 boost::shared_ptr<ARDOUR::Playlist>,
 366                 PlaylistSet& modified_playlists
 367                 );
 368
 369         void add_stateful_diff_commands_for_playlists (PlaylistSet const &);
 370
 371         void collect_new_region_view (RegionView *);
 372
 373         bool _copy;
 374         RegionView* _new_region_view;
 375 };
 376
 377 /** Drag to insert a region from somewhere */
 378 class RegionInsertDrag : public RegionMotionDrag
 379 {
 380 public:
 381         RegionInsertDrag (Editor *, boost::shared_ptr<ARDOUR::Region>, RouteTimeAxisView*, ARDOUR::framepos_t);
 382
 383         void finished (GdkEvent *, bool);
 384         void aborted (bool);
 385
 386         bool regions_came_from_canvas () const {
 387                 return false;
 388         }
 389 };
 390
 391 /** Region drag in splice mode */
 392 class RegionSpliceDrag : public RegionMoveDrag
 393 {
 394 public:
 395         RegionSpliceDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &);
 396
 397         void motion (GdkEvent *, bool);
 398         void finished (GdkEvent *, bool);
 399         void aborted (bool);
 400 };
 401
 402 /** Drags to create regions */
 403 class RegionCreateDrag : public Drag
 404 {
 405 public:
 406         RegionCreateDrag (Editor *, ArdourCanvas::Item *, TimeAxisView *);
 407
 408         void motion (GdkEvent *, bool);
 409         void finished (GdkEvent *, bool);
 410         void aborted (bool);
 411
 412 private:
 413         MidiTimeAxisView* _view;
 414         boost::shared_ptr<ARDOUR::Region> _region;
 415         void add_region ();
 416 };
 417
 418 /** Drags to resize MIDI notes */
 419 class NoteResizeDrag : public Drag
 420 {
 421 public:
 422         NoteResizeDrag (Editor *, ArdourCanvas::Item *);
 423
 424         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 425         void motion (GdkEvent *, bool);
 426         void finished (GdkEvent *, bool);
 427         void aborted (bool);
 428
 429 private:
 430         MidiRegionView*     region;
 431         bool                relative;
 432         bool                at_front;
 433 };
 434
 435 /** Drags to move MIDI notes */
 436 class NoteDrag : public Drag
 437 {
 438   public:
 439         NoteDrag (Editor*, ArdourCanvas::Item*);
 440
 441         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 442         void motion (GdkEvent *, bool);
 443         void finished (GdkEvent *, bool);
 444         void aborted (bool);
 445
 446   private:
 447
 448         ARDOUR::frameoffset_t total_dx () const;
 449         int8_t total_dy () const;
 450
 451         MidiRegionView* _region;
 452         Gnome::Canvas::CanvasNoteEvent* _primary;
 453         double _cumulative_dx;
 454         double _cumulative_dy;
 455         bool _was_selected;
 456         double _note_height;
 457 };
 458
 459 /** Drag to move MIDI patch changes */
 460 class PatchChangeDrag : public Drag
 461 {
 462 public:
 463         PatchChangeDrag (Editor *, ArdourCanvas::CanvasPatchChange *, MidiRegionView *);
 464
 465         void motion (GdkEvent *, bool);
 466         void finished (GdkEvent *, bool);
 467         void aborted (bool);
 468
 469         bool y_movement_matters () const {
 470                 return false;
 471         }
 472
 473         void setup_pointer_frame_offset ();
 474
 475 private:
 476         MidiRegionView* _region_view;
 477         ArdourCanvas::CanvasPatchChange* _patch_change;
 478         double _cumulative_dx;
 479 };
 480
 481 /** Drag of region gain */
 482 class RegionGainDrag : public Drag
 483 {
 484 public:
 485         RegionGainDrag (Editor *, ArdourCanvas::Item *);
 486
 487         void motion (GdkEvent *, bool);
 488         void finished (GdkEvent *, bool);
 489         bool active (Editing::MouseMode m) {
 490                 return (m == Editing::MouseGain);
 491         }
 492
 493         void aborted (bool);
 494 };
 495
 496 /** Drag to trim region(s) */
 497 class TrimDrag : public RegionDrag
 498 {
 499 public:
 500         enum Operation {
 501                 StartTrim,
 502                 EndTrim,
 503                 ContentsTrim,
 504         };
 505
 506         TrimDrag (Editor *, ArdourCanvas::Item *, RegionView*, std::list<RegionView*> const &);
 507
 508         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 509         void motion (GdkEvent *, bool);
 510         void finished (GdkEvent *, bool);
 511         void aborted (bool);
 512
 513         bool y_movement_matters () const {
 514                 return false;
 515         }
 516
 517         void setup_pointer_frame_offset ();
 518
 519 private:
 520
 521         Operation _operation;
 522 };
 523
 524 /** Meter marker drag */
 525 class MeterMarkerDrag : public Drag
 526 {
 527 public:
 528         MeterMarkerDrag (Editor *, ArdourCanvas::Item *, bool);
 529
 530         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 531         void motion (GdkEvent *, bool);
 532         void finished (GdkEvent *, bool);
 533         void aborted (bool);
 534
 535         bool allow_vertical_autoscroll () const {
 536                 return false;
 537         }
 538
 539         bool y_movement_matters () const {
 540                 return false;
 541         }
 542
 543         void setup_pointer_frame_offset ();
 544
 545 private:
 546         MeterMarker* _marker;
 547         bool _copy;
 548 };
 549
 550 /** Tempo marker drag */
 551 class TempoMarkerDrag : public Drag
 552 {
 553 public:
 554         TempoMarkerDrag (Editor *, ArdourCanvas::Item *, bool);
 555
 556         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 557         void motion (GdkEvent *, bool);
 558         void finished (GdkEvent *, bool);
 559         void aborted (bool);
 560
 561         bool allow_vertical_autoscroll () const {
 562                 return false;
 563         }
 564
 565         bool y_movement_matters () const {
 566                 return false;
 567         }
 568
 569         void setup_pointer_frame_offset ();
 570
 571 private:
 572         TempoMarker* _marker;
 573         bool _copy;
 574 };
 575
 576
 577 /** Drag of the playhead cursor */
 578 class CursorDrag : public Drag
 579 {
 580 public:
 581         CursorDrag (Editor *, ArdourCanvas::Item *, bool);
 582
 583         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 584         void motion (GdkEvent *, bool);
 585         void finished (GdkEvent *, bool);
 586         void aborted (bool);
 587
 588         bool active (Editing::MouseMode) {
 589                 return true;
 590         }
 591
 592         bool allow_vertical_autoscroll () const {
 593                 return false;
 594         }
 595
 596         bool y_movement_matters () const {
 597                 return true;
 598         }
 599
 600 private:
 601         void fake_locate (framepos_t);
 602
 603         bool _stop; ///< true to stop the transport on starting the drag, otherwise false
 604         double _grab_zoom; ///< editor frames per unit when our grab started
 605 };
 606
 607 /** Region fade-in drag */
 608 class FadeInDrag : public RegionDrag
 609 {
 610 public:
 611         FadeInDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &);
 612
 613         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 614         void motion (GdkEvent *, bool);
 615         void finished (GdkEvent *, bool);
 616         void aborted (bool);
 617
 618         bool y_movement_matters () const {
 619                 return false;
 620         }
 621
 622         void setup_pointer_frame_offset ();
 623 };
 624
 625 /** Region fade-out drag */
 626 class FadeOutDrag : public RegionDrag
 627 {
 628 public:
 629         FadeOutDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &);
 630
 631         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 632         void motion (GdkEvent *, bool);
 633         void finished (GdkEvent *, bool);
 634         void aborted (bool);
 635
 636         bool y_movement_matters () const {
 637                 return false;
 638         }
 639
 640         void setup_pointer_frame_offset ();
 641 };
 642
 643 /** Marker drag */
 644 class MarkerDrag : public Drag
 645 {
 646 public:
 647         MarkerDrag (Editor *, ArdourCanvas::Item *);
 648         ~MarkerDrag ();
 649
 650         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 651         void motion (GdkEvent *, bool);
 652         void finished (GdkEvent *, bool);
 653         void aborted (bool);
 654
 655         bool allow_vertical_autoscroll () const {
 656                 return false;
 657         }
 658
 659         bool y_movement_matters () const {
 660                 return false;
 661         }
 662
 663         void setup_pointer_frame_offset ();
 664
 665 private:
 666         void update_item (ARDOUR::Location *);
 667
 668         Marker* _marker; ///< marker being dragged
 669         std::list<ARDOUR::Location*> _copied_locations;
 670         ArdourCanvas::Points _points;
 671 };
 672
 673 /** Control point drag */
 674 class ControlPointDrag : public Drag
 675 {
 676 public:
 677         ControlPointDrag (Editor *, ArdourCanvas::Item *);
 678
 679         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 680         void motion (GdkEvent *, bool);
 681         void finished (GdkEvent *, bool);
 682         void aborted (bool);
 683
 684         bool active (Editing::MouseMode m);
 685
 686 private:
 687
 688         ControlPoint* _point;
 689         double _fixed_grab_x;
 690         double _fixed_grab_y;
 691         double _cumulative_x_drag;
 692         double _cumulative_y_drag;
 693         static double const _zero_gain_fraction;
 694 };
 695
 696 /** Gain or automation line drag */
 697 class LineDrag : public Drag
 698 {
 699 public:
 700         LineDrag (Editor *e, ArdourCanvas::Item *i);
 701
 702         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 703         void motion (GdkEvent *, bool);
 704         void finished (GdkEvent *, bool);
 705         void aborted (bool);
 706
 707         bool active (Editing::MouseMode) {
 708                 return true;
 709         }
 710
 711 private:
 712
 713         AutomationLine* _line;
 714         double _fixed_grab_x;
 715         double _fixed_grab_y;
 716         uint32_t _before;
 717         uint32_t _after;
 718         double _cumulative_y_drag;
 719 };
 720
 721 /** Transient feature line drags*/
 722 class FeatureLineDrag : public Drag
 723 {
 724 public:
 725         FeatureLineDrag (Editor *e, ArdourCanvas::Item *i);
 726
 727         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 728         void motion (GdkEvent *, bool);
 729         void finished (GdkEvent *, bool);
 730         void aborted (bool);
 731
 732         bool active (Editing::MouseMode) {
 733                 return true;
 734         }
 735
 736 private:
 737
 738         ArdourCanvas::Line* _line;
 739         AudioRegionView* _arv;
 740
 741         double _region_view_grab_x;
 742         double _cumulative_x_drag;
 743
 744         float _before;
 745         uint32_t _max_x;
 746 };
 747
 748 /** Dragging of a rubberband rectangle for selecting things */
 749 class RubberbandSelectDrag : public Drag
 750 {
 751 public:
 752         RubberbandSelectDrag (Editor *, ArdourCanvas::Item *);
 753
 754         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 755         void motion (GdkEvent *, bool);
 756         void finished (GdkEvent *, bool);
 757         void aborted (bool);
 758
 759         std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
 760                 return std::make_pair (8, 1);
 761         }
 762 };
 763
 764 /** Region drag in time-FX mode */
 765 class TimeFXDrag : public RegionDrag
 766 {
 767 public:
 768         TimeFXDrag (Editor *, ArdourCanvas::Item *, RegionView *, std::list<RegionView*> const &);
 769
 770         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 771         void motion (GdkEvent *, bool);
 772         void finished (GdkEvent *, bool);
 773         void aborted (bool);
 774 };
 775
 776 /** Scrub drag in audition mode */
 777 class ScrubDrag : public Drag
 778 {
 779 public:
 780         ScrubDrag (Editor *, ArdourCanvas::Item *);
 781
 782         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 783         void motion (GdkEvent *, bool);
 784         void finished (GdkEvent *, bool);
 785         void aborted (bool);
 786 };
 787
 788 /** Drag in range select mode */
 789 class SelectionDrag : public Drag
 790 {
 791 public:
 792         enum Operation {
 793                 CreateSelection,
 794                 SelectionStartTrim,
 795                 SelectionEndTrim,
 796                 SelectionMove
 797         };
 798
 799         SelectionDrag (Editor *, ArdourCanvas::Item *, Operation);
 800
 801         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 802         void motion (GdkEvent *, bool);
 803         void finished (GdkEvent *, bool);
 804         void aborted (bool);
 805
 806         void setup_pointer_frame_offset ();
 807
 808 private:
 809         Operation _operation;
 810         bool _copy;
 811         int _original_pointer_time_axis;
 812         int _last_pointer_time_axis;
 813         std::list<TimeAxisView*> _added_time_axes;
 814 };
 815
 816 /** Range marker drag */
 817 class RangeMarkerBarDrag : public Drag
 818 {
 819 public:
 820         enum Operation {
 821                 CreateRangeMarker,
 822                 CreateTransportMarker,
 823                 CreateCDMarker
 824         };
 825
 826         RangeMarkerBarDrag (Editor *, ArdourCanvas::Item *, Operation);
 827
 828         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 829         void motion (GdkEvent *, bool);
 830         void finished (GdkEvent *, bool);
 831         void aborted (bool);
 832
 833         bool allow_vertical_autoscroll () const {
 834                 return false;
 835         }
 836
 837         bool y_movement_matters () const {
 838                 return false;
 839         }
 840
 841 private:
 842         void update_item (ARDOUR::Location *);
 843
 844         Operation _operation;
 845         ArdourCanvas::SimpleRect* _drag_rect;
 846         bool _copy;
 847 };
 848
 849 /** Drag of rectangle to set zoom */
 850 class MouseZoomDrag : public Drag
 851 {
 852 public:
 853         MouseZoomDrag (Editor *, ArdourCanvas::Item *);
 854
 855         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 856         void motion (GdkEvent *, bool);
 857         void finished (GdkEvent *, bool);
 858         void aborted (bool);
 859
 860         std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
 861                 return std::make_pair (4, 4);
 862         }
 863
 864 private:
 865         bool _zoom_out;
 866 };
 867
 868 /** Drag of a range of automation data, changing value but not position */
 869 class AutomationRangeDrag : public Drag
 870 {
 871 public:
 872         AutomationRangeDrag (Editor *, ArdourCanvas::Item *, std::list<ARDOUR::AudioRange> const &);
 873
 874         void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
 875         void motion (GdkEvent *, bool);
 876         void finished (GdkEvent *, bool);
 877         void aborted (bool);
 878
 879         bool x_movement_matters () const {
 880                 return false;
 881         }
 882
 883 private:
 884         std::list<ARDOUR::AudioRange> _ranges;
 885         AutomationTimeAxisView* _atav;
 886
 887         /** A line that is part of the drag */
 888         struct Line {
 889                 boost::shared_ptr<AutomationLine> line; ///< the line
 890                 std::list<ControlPoint*> points; ///< points to drag on the line
 891                 std::pair<ARDOUR::framepos_t, ARDOUR::framepos_t> range; ///< the range of all points on the line, in session frames
 892                 XMLNode* state; ///< the XML state node before the drag
 893         };
 894
 895         std::list<Line> _lines;
 896
 897         bool _nothing_to_drag;
 898 };
 899
 900 #endif /* __gtk2_ardour_editor_drag_h_ */
 901