gtk2_ardour/midi_region_view.h

   1 /*
   2     Copyright (C) 2001-2006 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
  50 class MidiRegionView : public RegionView
  51 {
  52   public:
  53         MidiRegionView (ArdourCanvas::Group *,
  54                         RouteTimeAxisView&,
  55                         boost::shared_ptr<ARDOUR::MidiRegion>,
  56                         double initial_samples_per_unit,
  57                         Gdk::Color& basic_color);
  58
  59         ~MidiRegionView ();
  60
  61         virtual void init (Gdk::Color& basic_color, bool wfd);
  62
  63         inline const boost::shared_ptr<ARDOUR::MidiRegion> midi_region() const
  64                 { return boost::dynamic_pointer_cast<ARDOUR::MidiRegion>(_region); }
  65
  66         inline MidiTimeAxisView* midi_view() const
  67                 { return dynamic_cast<MidiTimeAxisView*>(&trackview); }
  68
  69         inline MidiStreamView* midi_stream_view() const
  70                 { return midi_view()->midi_view(); }
  71
  72         void set_y_position_and_height (double, double);
  73
  74         void redisplay_model();
  75
  76     GhostRegion* add_ghost (AutomationTimeAxisView&);
  77
  78         void add_event(const ARDOUR::MidiEvent& ev);
  79         void add_note(const ARDOUR::MidiModel::Note& note);
  80
  81         void begin_write();
  82         void end_write();
  83         void extend_active_notes();
  84
  85         void create_note_at(double x, double y, double dur);
  86
  87         void display_model(boost::shared_ptr<ARDOUR::MidiModel> model);
  88
  89         /* This stuff is a bit boilerplatey ATM.  Work in progress. */
  90
  91         inline void start_remove_command() {
  92                 if (!_delta_command)
  93                         _delta_command = _model->new_delta_command();
  94         }
  95
  96         inline void start_delta_command() {
  97                 if (!_delta_command)
  98                         _delta_command = _model->new_delta_command();
  99         }
 100
 101         void command_remove_note(ArdourCanvas::CanvasMidiEvent* ev) {
 102                 if (_delta_command && ev->note()) {
 103                         _delta_command->remove(*ev->note());
 104                         ev->selected(true);
 105                 }
 106         }
 107
 108         void command_add_note(ARDOUR::MidiModel::Note& note) {
 109                 if (_delta_command) {
 110                         _delta_command->add(note);
 111                 }
 112         }
 113
 114         void note_entered(ArdourCanvas::CanvasMidiEvent* ev) {
 115                 cerr << "ENTERED, STATE = " << _mouse_state << endl;
 116                 if (_mouse_state == EraseDragging) {
 117                         start_delta_command();
 118                         ev->selected(true);
 119                         _delta_command->remove(*ev->note());
 120                 }
 121         }
 122
 123         void abort_command() {
 124                 delete _delta_command;
 125                 _delta_command = NULL;
 126                 clear_selection();
 127         }
 128
 129         void apply_command() {
 130                 if (_delta_command) {
 131                         _model->apply_command(_delta_command);
 132                         _delta_command = NULL;
 133                 }
 134                 midi_view()->midi_track()->diskstream()->playlist_modified();
 135         }
 136
 137         void   unique_select(ArdourCanvas::CanvasMidiEvent* ev);
 138         void   note_selected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 139         void   note_deselected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 140         void   delete_selection();
 141         size_t selection_size() { return _selection.size(); }
 142
 143         void move_selection(double dx, double dy);
 144         void note_dropped(ArdourCanvas::CanvasMidiEvent* ev, double dt, uint8_t dnote);
 145
 146   protected:
 147
 148     /* this constructor allows derived types
 149        to specify their visibility requirements
 150        to the TimeAxisViewItem parent class
 151     */
 152
 153     MidiRegionView (ArdourCanvas::Group *,
 154                         RouteTimeAxisView&,
 155                         boost::shared_ptr<ARDOUR::MidiRegion>,
 156                         double samples_per_unit,
 157                         Gdk::Color& basic_color,
 158                         TimeAxisViewItem::Visibility);
 159
 160     void region_resized (ARDOUR::Change);
 161
 162     void set_flags (XMLNode *);
 163     void store_flags ();
 164
 165         void reset_width_dependent_items (double pixel_width);
 166
 167   private:
 168
 169         void clear_events();
 170
 171         bool canvas_event(GdkEvent* ev);
 172         bool note_canvas_event(GdkEvent* ev);
 173
 174         void clear_selection_except(ArdourCanvas::CanvasMidiEvent* ev);
 175         void clear_selection() { clear_selection_except(NULL); }
 176         void update_drag_selection(double last_x, double x, double last_y, double y);
 177
 178         double _default_note_length;
 179
 180         boost::shared_ptr<ARDOUR::MidiModel>        _model;
 181         std::vector<ArdourCanvas::CanvasMidiEvent*> _events;
 182         ArdourCanvas::CanvasNote**                  _active_notes;
 183         ArdourCanvas::Group*                        _note_group;
 184         ARDOUR::MidiModel::DeltaCommand*            _delta_command;
 185
 186         enum MouseState { None, Pressed, SelectDragging, AddDragging, EraseDragging };
 187         MouseState _mouse_state;
 188         int _pressed_button;
 189
 190         typedef std::set<ArdourCanvas::CanvasMidiEvent*> Selection;
 191         Selection _selection;
 192 };
 193
 194 #endif /* __gtk_ardour_midi_region_view_h__ */