gtk2_ardour/midi_region_view.h

   1 /*
   2     Copyright (C) 2001-2007 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 #ifndef __gtk_ardour_midi_region_view_h__
  20 #define __gtk_ardour_midi_region_view_h__
  21
  22 #include <vector>
  23
  24 #include <libgnomecanvasmm.h>
  25 #include <libgnomecanvasmm/polygon.h>
  26 #include <ardour/midi_track.h>
  27 #include <ardour/midi_region.h>
  28 #include <ardour/midi_model.h>
  29 #include <ardour/diskstream.h>
  30 #include <ardour/types.h>
  31
  32 #include "region_view.h"
  33 #include "midi_time_axis.h"
  34 #include "time_axis_view_item.h"
  35 #include "automation_line.h"
  36 #include "enums.h"
  37 #include "canvas.h"
  38 #include "canvas-note.h"
  39 #include "canvas-midi-event.h"
  40
  41 namespace ARDOUR {
  42         class MidiRegion;
  43         class MidiModel;
  44 };
  45
  46 class MidiTimeAxisView;
  47 class GhostRegion;
  48 class AutomationTimeAxisView;
  49 class AutomationRegionView;
  50
  51 class MidiRegionView : public RegionView
  52 {
  53   public:
  54         MidiRegionView (ArdourCanvas::Group *,
  55                         RouteTimeAxisView&,
  56                         boost::shared_ptr<ARDOUR::MidiRegion>,
  57                         double initial_samples_per_unit,
  58                         Gdk::Color& basic_color);
  59
  60         ~MidiRegionView ();
  61
  62         virtual void init (Gdk::Color& basic_color, bool wfd);
  63
  64         inline const boost::shared_ptr<ARDOUR::MidiRegion> midi_region() const
  65                 { return boost::dynamic_pointer_cast<ARDOUR::MidiRegion>(_region); }
  66
  67         inline MidiTimeAxisView* midi_view() const
  68                 { return dynamic_cast<MidiTimeAxisView*>(&trackview); }
  69
  70         inline MidiStreamView* midi_stream_view() const
  71                 { return midi_view()->midi_view(); }
  72
  73         void set_y_position_and_height (double, double);
  74
  75         void redisplay_model();
  76
  77     GhostRegion* add_ghost (AutomationTimeAxisView&);
  78
  79         void add_note(const ARDOUR::Note& note, bool copy_note);
  80         void resolve_note(uint8_t note_num, double end_time);
  81
  82         void begin_write();
  83         void end_write();
  84         void extend_active_notes();
  85
  86         void create_note_at(double x, double y, double dur);
  87
  88         void display_model(boost::shared_ptr<ARDOUR::MidiModel> model);
  89
  90         /* This stuff is a bit boilerplatey ATM.  Work in progress. */
  91
  92         inline void start_remove_command() {
  93                 if (!_delta_command)
  94                         _delta_command = _model->new_delta_command();
  95         }
  96
  97         inline void start_delta_command() {
  98                 if (!_delta_command)
  99                         _delta_command = _model->new_delta_command();
 100         }
 101
 102         void command_add_note(ARDOUR::Note& note) {
 103                 if (_delta_command)
 104                         _delta_command->add(note);
 105         }
 106
 107         void command_remove_note(ArdourCanvas::CanvasMidiEvent* ev) {
 108                 if (_delta_command && ev->note()) {
 109                         _delta_command->remove(*ev->note());
 110                         ev->selected(true);
 111                 }
 112         }
 113
 114         void abort_command() {
 115                 delete _delta_command;
 116                 _delta_command = NULL;
 117                 clear_selection();
 118         }
 119
 120         void apply_command() {
 121                 if (_delta_command) {
 122                         _model->apply_command(_delta_command);
 123                         _delta_command = NULL;
 124                 }
 125                 midi_view()->midi_track()->diskstream()->playlist_modified();
 126         }
 127
 128         void   note_entered(ArdourCanvas::CanvasMidiEvent* ev);
 129         void   unique_select(ArdourCanvas::CanvasMidiEvent* ev);
 130         void   note_selected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 131         void   note_deselected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 132         void   delete_selection();
 133         size_t selection_size() { return _selection.size(); }
 134
 135         void move_selection(double dx, double dy);
 136         void note_dropped(ArdourCanvas::CanvasMidiEvent* ev, double dt, uint8_t dnote);
 137
 138         enum MouseState { None, Pressed, SelectTouchDragging, SelectRectDragging, AddDragging, EraseTouchDragging };
 139         MouseState mouse_state() const { return _mouse_state; }
 140
 141   protected:
 142
 143     /* this constructor allows derived types
 144        to specify their visibility requirements
 145        to the TimeAxisViewItem parent class
 146     */
 147
 148     MidiRegionView (ArdourCanvas::Group *,
 149                         RouteTimeAxisView&,
 150                         boost::shared_ptr<ARDOUR::MidiRegion>,
 151                         double samples_per_unit,
 152                         Gdk::Color& basic_color,
 153                         TimeAxisViewItem::Visibility);
 154
 155     void region_resized (ARDOUR::Change);
 156
 157     void set_flags (XMLNode *);
 158     void store_flags ();
 159
 160         void reset_width_dependent_items (double pixel_width);
 161
 162   private:
 163
 164         void clear_events();
 165         void switch_source(boost::shared_ptr<ARDOUR::Source> src);
 166
 167         bool canvas_event(GdkEvent* ev);
 168         bool note_canvas_event(GdkEvent* ev);
 169
 170         void clear_selection_except(ArdourCanvas::CanvasMidiEvent* ev);
 171         void clear_selection() { clear_selection_except(NULL); }
 172         void update_drag_selection(double last_x, double x, double last_y, double y);
 173
 174         double _default_note_length;
 175
 176         boost::shared_ptr<ARDOUR::MidiModel>        _model;
 177         std::vector<ArdourCanvas::CanvasMidiEvent*> _events;
 178         ArdourCanvas::CanvasNote**                  _active_notes;
 179         ArdourCanvas::Group*                        _note_group;
 180         ARDOUR::MidiModel::DeltaCommand*            _delta_command;
 181
 182         MouseState _mouse_state;
 183         int _pressed_button;
 184
 185         typedef std::set<ArdourCanvas::CanvasMidiEvent*> Selection;
 186         Selection _selection;
 187 };
 188
 189 #endif /* __gtk_ardour_midi_region_view_h__ */