Robin Gareus
1eb98316a3
This is to prevent polluting the global namespace with a symbol name that is likely to cause conflicts.
137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/*
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* Copyright (C) 2010-2016 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _PIANO_KEYBOARD_H_
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#define _PIANO_KEYBOARD_H_
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#include <map>
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#include <gtkmm/drawingarea.h>
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#include "piano_key_bindings.h"
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#define NNOTES (128)
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class APianoKeyboard : public Gtk::DrawingArea
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{
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public:
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APianoKeyboard ();
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~APianoKeyboard ();
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sigc::signal<void, int, int> NoteOn;
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sigc::signal<void, int> NoteOff;
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sigc::signal<void> Rest;
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sigc::signal<void,bool> SustainChanged;
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sigc::signal<void, int, bool> PitchBend;
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sigc::signal<void, bool> SwitchOctave;
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void sustain_press ();
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void sustain_release ();
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void set_note_on (int note);
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void set_note_off (int note);
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void reset ();
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void set_grand_piano_highlight (bool enabled);
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void set_annotate_layout (bool enabled);
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void set_annotate_octave (bool enabled);
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void set_monophonic (bool monophonic);
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void set_octave (int octave);
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void set_octave_range (int octave_range);
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void set_keyboard_layout (PianoKeyBindings::Layout layout);
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void set_velocities (int min_vel, int max_vel, int key_vel);
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protected:
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bool on_key_press_event (GdkEventKey*);
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bool on_key_release_event (GdkEventKey*);
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bool on_button_press_event (GdkEventButton*);
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bool on_button_release_event (GdkEventButton*);
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bool on_motion_notify_event (GdkEventMotion*);
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bool on_expose_event (GdkEventExpose*);
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void on_size_request (Gtk::Requisition*);
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void on_size_allocate (Gtk::Allocation&);
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private:
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void annotate_layout (cairo_t* cr, int note) const;
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void annotate_note (cairo_t* cr, int note) const;
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void draw_note (cairo_t* cr, int note) const;
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void queue_note_draw (int note);
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bool handle_fixed_keys (GdkEventKey*);
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void press_key (int key, int vel);
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void release_key (int key);
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void stop_sustained_notes ();
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void stop_unsustained_notes ();
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int get_note_for_xy (int x, int y) const;
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int get_velocity_for_note_at_y (int note, int y) const;
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int is_black (int key) const;
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double black_key_left_shift (int key) const;
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void recompute_dimensions ();
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struct PKNote {
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PKNote ()
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: pressed (false)
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, sustained (false)
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, white (false)
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, x (0)
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, w (0)
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, h (0)
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{}
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bool pressed; /* true if key is in pressed down state. */
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bool sustained; /* true if note is sustained. */
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bool white; /* true if key is white; 0 otherwise. */
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int x; /* Distance between the left edge of the key and the left edge of the widget, in pixels. */
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int w; /* Width of the key, in pixels. */
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int h; /* Height of the key, in pixels. */
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};
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bool _sustain_new_notes;
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bool _highlight_grand_piano_range;
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bool _annotate_layout;
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bool _annotate_octave;
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int _octave;
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int _octave_range;
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int _note_being_pressed_using_mouse;
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int _min_note;
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int _max_note;
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int _last_key;
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bool _monophonic;
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int _min_velocity;
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int _max_velocity;
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int _key_velocity;
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PKNote _notes[NNOTES];
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PianoKeyBindings _keyboard_layout;
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std::map<std::string, int> _note_stack;
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/* these are only valid during expose/draw */
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PangoFontDescription* _font_cue;
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PangoFontDescription* _font_octave;
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};
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#endif
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