143 lines
4.0 KiB
C++
143 lines
4.0 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 <glib.h>
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#include <gtkmm/drawingarea.h>
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#define NNOTES (128)
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#define PIANO_MIN_NOTE 21
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#define PIANO_MAX_NOTE 108
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#define OCTAVE_MIN (-1)
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#define OCTAVE_MAX (7)
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class PianoKeyboard : public Gtk::DrawingArea
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{
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public:
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PianoKeyboard ();
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~PianoKeyboard ();
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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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enum Layout {
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QWERTY,
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QWERTZ,
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AZERTY,
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DVORAK
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};
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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 set_keyboard_cue (bool enabled);
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void set_grand_piano_highlight (bool enabled);
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void show_note_label (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 (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 draw_keyboard_cue (cairo_t* cr, int note);
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void queue_note_draw (int note);
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void draw_note (cairo_t* cr, int note);
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int press_key (int key, int vel);
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int release_key (int key);
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void release_key ();
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void stop_unsustained_notes ();
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void stop_sustained_notes ();
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int key_binding (const char* key);
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void bind_key (const char* key, int note);
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void clear_notes ();
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void bind_keys_qwerty ();
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void bind_keys_qwertz ();
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void bind_keys_azerty ();
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void bind_keys_dvorak ();
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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; /* 1 if key is in pressed down state. */
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bool sustained; /* 1 if note is sustained. */
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bool white; /* 1 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 _maybe_stop_sustained_notes;
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bool _sustain_new_notes;
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bool _enable_keyboard_cue;
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bool _highlight_grand_piano_range;
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bool _print_note_label;
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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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std::map<std::string, int> _key_bindings; /**< Table used to translate from PC keyboard character to MIDI note number. */
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std::map<int, std::string> _note_bindings; /**< Table to translate from MIDI note number to PC keyboard character. */
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};
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#endif /* __PIANO_KEYBOARD_H__ */
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