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         inline uint8_t contents_note_range() const
  71                 { return midi_stream_view()->highest_note() - midi_stream_view()->lowest_note() + 1; }
  72
  73         inline double footer_height() const
  74                 { return name_highlight->property_y2() - name_highlight->property_y1(); }
  75
  76         inline double contents_height() const
  77                 { return (trackview.height - footer_height() - 5.0); }
  78
  79         inline double note_height() const
  80                 { return contents_height() / (double)contents_note_range(); }
  81
  82         inline double note_to_y(uint8_t note) const
  83                 { return trackview.height
  84                                 - (contents_height() * (note - midi_stream_view()->lowest_note() + 1))
  85                                 - footer_height() - 3.0; }
  86
  87         inline uint8_t y_to_note(double y) const
  88                 { return (uint8_t)floor((contents_height() - y)
  89                                 / contents_height() * (double)contents_note_range()); }
  90
  91         void set_y_position_and_height (double, double);
  92
  93     void show_region_editor ();
  94
  95     GhostRegion* add_ghost (AutomationTimeAxisView&);
  96
  97         void add_event(const ARDOUR::MidiEvent& ev);
  98         void add_note(const ARDOUR::MidiModel::Note& note);
  99
 100         void begin_write();
 101         void end_write();
 102         void extend_active_notes();
 103
 104         void create_note_at(double x, double y);
 105
 106         void display_model(boost::shared_ptr<ARDOUR::MidiModel> model);
 107
 108         /* This stuff is a bit boilerplatey ATM.  Work in progress. */
 109
 110         inline void start_remove_command() {
 111                 _command_mode = Remove;
 112                 if (!_delta_command)
 113                         _delta_command = _model->new_delta_command();
 114         }
 115
 116         inline void start_delta_command() {
 117                 _command_mode = Delta;
 118                 if (!_delta_command)
 119                         _delta_command = _model->new_delta_command();
 120         }
 121
 122         void command_remove_note(ArdourCanvas::CanvasMidiEvent* ev) {
 123                 if (_delta_command && ev->note()) {
 124                         _delta_command->remove(*ev->note());
 125                         ev->selected(true);
 126                 }
 127         }
 128
 129         void command_add_note(ARDOUR::MidiModel::Note& note) {
 130                 if (_delta_command) {
 131                         _delta_command->add(note);
 132                 }
 133         }
 134
 135         void note_entered(ArdourCanvas::CanvasMidiEvent* ev) {
 136                 if (_command_mode == Remove && _delta_command && ev->note())
 137                         _delta_command->remove(*ev->note());
 138         }
 139
 140         //ARDOUR::MidiModel::DeltaCommand* delta_command() { return _delta_command; }
 141
 142         void abort_command() {
 143                 delete _delta_command;
 144                 _delta_command = NULL;
 145                 _command_mode = None;
 146         }
 147
 148         void apply_command() {
 149                 if (_delta_command) {
 150                         _model->apply_command(_delta_command);
 151                         _delta_command = NULL;
 152                 }
 153                 _command_mode = None;
 154         }
 155
 156   protected:
 157
 158     /* this constructor allows derived types
 159        to specify their visibility requirements
 160        to the TimeAxisViewItem parent class
 161     */
 162
 163     MidiRegionView (ArdourCanvas::Group *,
 164                         RouteTimeAxisView&,
 165                         boost::shared_ptr<ARDOUR::MidiRegion>,
 166                         double samples_per_unit,
 167                         Gdk::Color& basic_color,
 168                         TimeAxisViewItem::Visibility);
 169
 170     void region_resized (ARDOUR::Change);
 171
 172     void set_flags (XMLNode *);
 173     void store_flags ();
 174
 175         void reset_width_dependent_items (double pixel_width);
 176
 177   private:
 178
 179         void redisplay_model();
 180         void clear_events();
 181
 182         bool canvas_event(GdkEvent* ev);
 183         bool note_canvas_event(GdkEvent* ev);
 184
 185         boost::shared_ptr<ARDOUR::MidiModel> _model;
 186         std::vector<ArdourCanvas::Item*>     _events;
 187         ArdourCanvas::CanvasNote**           _active_notes;
 188         ARDOUR::MidiModel::DeltaCommand*     _delta_command;
 189
 190         enum CommandMode { None, Remove, Delta };
 191         CommandMode _command_mode;
 192
 193 };
 194
 195 #endif /* __gtk_ardour_midi_region_view_h__ */