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 "rgb_macros.h"
28 #include "ardour_ui.h"
29 #include "ui_config.h"
30 #include "interactive-item.h"
35 namespace Evoral { template<typename T> class Note; }
41 /** This manages all the event handling for any MIDI event on the canvas.
43 * This is not actually a canvas item itself to avoid the dreaded diamond,
44 * since various types of canvas items (Note (rect), Hit (diamond), etc)
45 * need to share this functionality but can't share an ancestor.
47 * Note: Because of this, derived classes need to manually bounce events to
48 * on_event, it won't happen automatically.
50 * A newer, better canvas should remove the need for all the ugly here.
52 class CanvasNoteEvent : virtual public sigc::trackable, public InteractiveItem {
54 typedef Evoral::Note<double> NoteType;
56 MidiRegionView& region,
58 const boost::shared_ptr<NoteType> note = boost::shared_ptr<NoteType>());
60 virtual ~CanvasNoteEvent();
62 virtual void show() = 0;
63 virtual void hide() = 0;
64 virtual bool on_event(GdkEvent* ev);
66 bool selected() const { return _selected; }
67 void selected(bool yn);
69 void move_event(double dx, double dy);
71 uint32_t base_color();
76 /** Channel changed for this specific event */
77 void on_channel_change(uint8_t channel);
79 /** Channel selection changed */
80 void on_channel_selection_change(uint16_t selection);
82 void show_channel_selector();
83 void hide_channel_selector();
85 virtual void set_outline_color(uint32_t c) = 0;
86 virtual void set_fill_color(uint32_t c) = 0;
88 virtual double x1() = 0;
89 virtual double y1() = 0;
90 virtual double x2() = 0;
91 virtual double y2() = 0;
93 const boost::shared_ptr<NoteType> note() const { return _note; }
95 inline static uint32_t meter_style_fill_color(uint8_t vel) {
97 return UINT_INTERPOLATE(
98 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorBase.get(),
99 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorMid.get(),
100 (vel / (double)63.0));
102 return UINT_INTERPOLATE(
103 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorMid.get(),
104 ARDOUR_UI::config()->canvasvar_MidiNoteMeterColorTop.get(),
105 ((vel-64) / (double)63.0));
109 /// calculate outline colors from fill colors of notes
110 inline static uint32_t calculate_outline(uint32_t color) {
111 return UINT_INTERPOLATE(color, 0x000000ff, 0.5);
114 /// hue circle divided into 16 equal-looking parts, courtesy Thorsten Wilms
115 static const uint32_t midi_channel_colors[16];
118 enum State { None, Pressed, Dragging };
120 MidiRegionView& _region;
122 InteractiveText* _text;
123 Widget* _channel_selector_widget;
125 const boost::shared_ptr<NoteType> _note;
131 } // namespace Canvas
133 #endif /* __gtk_ardour_canvas_midi_event_h__ */