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_region.h>
  27 #include <ardour/midi_model.h>
  28 #include <ardour/types.h>
  29
  30 #include "region_view.h"
  31 #include "midi_time_axis.h"
  32 #include "time_axis_view_item.h"
  33 #include "automation_line.h"
  34 #include "enums.h"
  35 #include "canvas.h"
  36 #include "canvas-note.h"
  37 #include "canvas-midi-event.h"
  38
  39 namespace ARDOUR {
  40         class MidiRegion;
  41         class MidiModel;
  42 };
  43
  44 class MidiTimeAxisView;
  45 class GhostRegion;
  46 class AutomationTimeAxisView;
  47
  48 class MidiRegionView : public RegionView
  49 {
  50   public:
  51         MidiRegionView (ArdourCanvas::Group *,
  52                         RouteTimeAxisView&,
  53                         boost::shared_ptr<ARDOUR::MidiRegion>,
  54                         double initial_samples_per_unit,
  55                         Gdk::Color& basic_color);
  56
  57         ~MidiRegionView ();
  58
  59         virtual void init (Gdk::Color& basic_color, bool wfd);
  60
  61         inline const boost::shared_ptr<ARDOUR::MidiRegion> midi_region() const
  62                 { return boost::dynamic_pointer_cast<ARDOUR::MidiRegion>(_region); }
  63
  64         inline MidiTimeAxisView* midi_view() const
  65                 { return dynamic_cast<MidiTimeAxisView*>(&trackview); }
  66
  67         inline MidiStreamView* midi_stream_view() const
  68                 { return midi_view()->midi_view(); }
  69
  70         void set_y_position_and_height (double, double);
  71
  72         void redisplay_model();
  73
  74     GhostRegion* add_ghost (AutomationTimeAxisView&);
  75
  76         void add_event(const ARDOUR::MidiEvent& ev);
  77         void add_note(const ARDOUR::MidiModel::Note& note);
  78
  79         void begin_write();
  80         void end_write();
  81         void extend_active_notes();
  82
  83         void create_note_at(double x, double y, double dur);
  84
  85         void display_model(boost::shared_ptr<ARDOUR::MidiModel> model);
  86
  87         /* This stuff is a bit boilerplatey ATM.  Work in progress. */
  88
  89         inline void start_remove_command() {
  90                 _command_mode = Remove;
  91                 if (!_delta_command)
  92                         _delta_command = _model->new_delta_command();
  93         }
  94
  95         inline void start_delta_command() {
  96                 _command_mode = Delta;
  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                 if (_command_mode == Remove && _delta_command && ev->note()) {
 116                         ev->selected(true);
 117                         _delta_command->remove(*ev->note());
 118                 }
 119         }
 120
 121         //ARDOUR::MidiModel::DeltaCommand* delta_command() { return _delta_command; }
 122
 123         void abort_command() {
 124                 delete _delta_command;
 125                 _delta_command = NULL;
 126                 _command_mode = None;
 127                 clear_selection();
 128         }
 129
 130         void apply_command() {
 131                 if (_delta_command) {
 132                         _model->apply_command(_delta_command);
 133                         _delta_command = NULL;
 134                 }
 135                 _command_mode = None;
 136         }
 137
 138         void   unique_select(ArdourCanvas::CanvasMidiEvent* ev);
 139         void   note_selected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 140         void   note_deselected(ArdourCanvas::CanvasMidiEvent* ev, bool add);
 141         void   delete_selection();
 142         size_t selection_size() { return _selection.size(); }
 143
 144   protected:
 145
 146     /* this constructor allows derived types
 147        to specify their visibility requirements
 148        to the TimeAxisViewItem parent class
 149     */
 150
 151     MidiRegionView (ArdourCanvas::Group *,
 152                         RouteTimeAxisView&,
 153                         boost::shared_ptr<ARDOUR::MidiRegion>,
 154                         double samples_per_unit,
 155                         Gdk::Color& basic_color,
 156                         TimeAxisViewItem::Visibility);
 157
 158     void region_resized (ARDOUR::Change);
 159
 160     void set_flags (XMLNode *);
 161     void store_flags ();
 162
 163         void reset_width_dependent_items (double pixel_width);
 164
 165   private:
 166
 167         void clear_events();
 168
 169         bool canvas_event(GdkEvent* ev);
 170         bool note_canvas_event(GdkEvent* ev);
 171
 172         void clear_selection_except(ArdourCanvas::CanvasMidiEvent* ev);
 173         void clear_selection() { clear_selection_except(NULL); }
 174
 175         double _default_note_length;
 176
 177         boost::shared_ptr<ARDOUR::MidiModel> _model;
 178         std::vector<ArdourCanvas::Item*>     _events;
 179         ArdourCanvas::CanvasNote**           _active_notes;
 180         ARDOUR::MidiModel::DeltaCommand*     _delta_command;
 181
 182         typedef std::set<ArdourCanvas::CanvasMidiEvent*> Selection;
 183         Selection _selection;
 184
 185         enum CommandMode { None, Remove, Delta };
 186         CommandMode _command_mode;
 187 };
 188
 189 #endif /* __gtk_ardour_midi_region_view_h__ */