2 Copyright (C) 2007 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __gtk_ardour_canvas_midi_event_h__
21 #define __gtk_ardour_canvas_midi_event_h__
23 #include <boost/shared_ptr.hpp>
24 #include <libgnomecanvasmm/text.h>
25 #include <libgnomecanvasmm/widget.h>
27 #include "ardour/midi_model.h"
29 #include "rgb_macros.h"
30 #include "ardour_ui.h"
31 #include "ui_config.h"
32 #include "interactive-item.h"
37 namespace Evoral { template<typename T> class Note; }
43 /** This manages all the event handling for any MIDI event on the canvas.
45 * This is not actually a canvas item itself to avoid the dreaded diamond,
46 * since various types of canvas items (Note (rect), Hit (diamond), etc)
47 * need to share this functionality but can't share an ancestor.
49 * Note: Because of this, derived classes need to manually bounce events to
50 * on_event, it won't happen automatically.
52 * A newer, better canvas should remove the need for all the ugly here.
54 class CanvasNoteEvent : virtual public sigc::trackable, public InteractiveItem {
56 typedef Evoral::Note<ARDOUR::MidiModel::TimeType> NoteType;
59 MidiRegionView& region,
61 const boost::shared_ptr<NoteType> note = boost::shared_ptr<NoteType>());
63 virtual ~CanvasNoteEvent();
65 virtual void show() = 0;
66 virtual void hide() = 0;
67 virtual bool on_event(GdkEvent* ev);
69 bool selected() const { return _selected; }
70 void selected(bool yn);
72 void move_event(double dx, double dy);
74 uint32_t base_color();
79 /** Channel changed for this specific event */
80 void on_channel_change(uint8_t channel);
82 /** Channel selection changed */
83 void on_channel_selection_change(uint16_t selection);
85 void show_channel_selector();
86 void hide_channel_selector();
88 virtual void set_outline_color(uint32_t c) = 0;
89 virtual void set_fill_color(uint32_t c) = 0;
91 virtual double x1() = 0;
92 virtual double y1() = 0;
93 virtual double x2() = 0;
94 virtual double y2() = 0;
96 const boost::shared_ptr<NoteType> note() const { return _note; }
98 inline static uint32_t meter_style_fill_color(uint8_t vel) {
100 return UINT_INTERPOLATE(
101 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorBase.get(),
102 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorMid.get(),
103 (vel / (double)63.0));
105 return UINT_INTERPOLATE(
106 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorMid.get(),
107 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorTop.get(),
108 ((vel-64) / (double)63.0));
112 /// calculate outline colors from fill colors of notes
113 inline static uint32_t calculate_outline(uint32_t color) {
114 return UINT_INTERPOLATE(color, 0x000000ff, 0.5);
117 /// hue circle divided into 16 equal-looking parts, courtesy Thorsten Wilms
118 static const uint32_t midi_channel_colors[16];
121 enum State { None, Pressed, Dragging };
123 MidiRegionView& _region;
125 InteractiveText* _text;
126 Widget* _channel_selector_widget;
128 const boost::shared_ptr<NoteType> _note;
134 } // namespace Canvas
136 #endif /* __gtk_ardour_canvas_midi_event_h__ */