2 Copyright (C) 2007 Paul Davis
3 Author: David Robillard
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 "canvas-noevent-text.h"
32 #include "ui_config.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
57 typedef Evoral::Note<ARDOUR::MidiModel::TimeType> NoteType;
60 MidiRegionView& region,
62 const boost::shared_ptr<NoteType> note = boost::shared_ptr<NoteType>());
64 virtual ~CanvasNoteEvent();
66 static PBD::Signal1<void,CanvasNoteEvent*> CanvasNoteEventDeleted;
68 virtual void show() = 0;
69 virtual void hide() = 0;
70 virtual bool on_event(GdkEvent* ev);
72 bool valid() const { return _valid; }
76 bool selected() const { return _selected; }
77 void set_selected(bool yn);
79 virtual void move_event(double dx, double dy) = 0;
81 uint32_t base_color();
86 /** Channel changed for this specific event */
87 void on_channel_change(uint8_t channel);
89 /** Channel selection changed */
90 void on_channel_selection_change(uint16_t selection);
92 virtual void set_outline_color(uint32_t c) = 0;
93 virtual void set_fill_color(uint32_t c) = 0;
95 virtual double x1() const = 0;
96 virtual double y1() const = 0;
97 virtual double x2() const = 0;
98 virtual double y2() const = 0;
100 float mouse_x_fraction() const { return _mouse_x_fraction; }
101 float mouse_y_fraction() const { return _mouse_y_fraction; }
103 const boost::shared_ptr<NoteType> note() const { return _note; }
104 MidiRegionView& region_view() const { return _region; }
106 inline static uint32_t meter_style_fill_color(uint8_t vel, bool selected) {
109 return UINT_INTERPOLATE(
110 ARDOUR_UI::config()->canvasvar_SelectedMidiNoteColorBase.get(),
111 ARDOUR_UI::config()->canvasvar_SelectedMidiNoteColorMid.get(),
112 (vel / (double)63.0));
114 return UINT_INTERPOLATE(
115 ARDOUR_UI::config()->canvasvar_SelectedMidiNoteColorMid.get(),
116 ARDOUR_UI::config()->canvasvar_SelectedMidiNoteColorTop.get(),
117 ((vel-64) / (double)63.0));
121 return UINT_INTERPOLATE(
122 ARDOUR_UI::config()->canvasvar_MidiNoteColorBase.get(),
123 ARDOUR_UI::config()->canvasvar_MidiNoteColorMid.get(),
124 (vel / (double)63.0));
126 return UINT_INTERPOLATE(
127 ARDOUR_UI::config()->canvasvar_MidiNoteColorMid.get(),
128 ARDOUR_UI::config()->canvasvar_MidiNoteColorTop.get(),
129 ((vel-64) / (double)63.0));
134 /// calculate outline colors from fill colors of notes
135 inline static uint32_t calculate_outline(uint32_t color) {
136 return UINT_INTERPOLATE(color, 0x000000ff, 0.5);
139 /// hue circle divided into 16 equal-looking parts, courtesy Thorsten Wilms
140 static const uint32_t midi_channel_colors[16];
142 bool mouse_near_ends () const;
143 bool big_enough_to_trim () const;
146 enum State { None, Pressed, Dragging };
148 MidiRegionView& _region;
152 const boost::shared_ptr<NoteType> _note;
155 float _mouse_x_fraction;
156 float _mouse_y_fraction;
157 uint16_t _channel_selection;
159 void set_mouse_fractions (GdkEvent*);
163 } // namespace Canvas
165 #endif /* __gtk_ardour_canvas_midi_event_h__ */