piano_roll_header.h

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/*
    Copyright (C) 2008 Paul Davis
    Author: Audan Holland ??

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef __ardour_piano_roll_header_h__
#define __ardour_piano_roll_header_h__

#include "ardour/types.h"

#include <gtkmm/drawingarea.h>

namespace ARDOUR {
        class MidiTrack;
}

class MidiTimeAxisView;
class MidiStreamView;
class PublicEditor;

class PianoRollHeader : public Gtk::DrawingArea {
public:
        PianoRollHeader(MidiStreamView&);

        bool on_expose_event (GdkEventExpose*);
        bool on_motion_notify_event (GdkEventMotion*);
        bool on_button_press_event (GdkEventButton*);
        bool on_button_release_event (GdkEventButton*);
        bool on_scroll_event (GdkEventScroll*);
        bool on_enter_notify_event (GdkEventCrossing*);
        bool on_leave_notify_event (GdkEventCrossing*);

        void on_size_request(Gtk::Requisition*);
        void on_size_allocate(Gtk::Allocation& a);

        void note_range_changed();

        struct Color {
                Color();
                Color(double _r, double _g, double _b);
                inline void set(const Color& c);

                double r;
                double g;
                double b;
        };

        sigc::signal<void,uint8_t> SetNoteSelection;
        sigc::signal<void,uint8_t> AddNoteSelection;
        sigc::signal<void,uint8_t> ToggleNoteSelection;
        sigc::signal<void,uint8_t> ExtendNoteSelection;

private:
        static Color white;
        static Color white_highlight;
        static Color white_shade_light;
        static Color white_shade_dark;
        static Color black;
        static Color black_highlight;
        static Color black_shade_light;
        static Color black_shade_dark;

        PianoRollHeader(const PianoRollHeader&);

        enum ItemType {
                BLACK_SEPARATOR,
                BLACK_MIDDLE_SEPARATOR,
                BLACK,
                WHITE_SEPARATOR,
                WHITE_RECT,
                WHITE_CF,
                WHITE_EB,
                WHITE_DGA
        };

        void invalidate_note_range(int lowest, int highest);

        void get_path(ItemType, int note, double x[], double y[]);

        void send_note_on(uint8_t note);
        void send_note_off(uint8_t note);

        void reset_clicked_note(uint8_t, bool invalidate = true);

        MidiStreamView& _view;

        uint8_t _event[3];

        Cairo::RefPtr<Cairo::Context> cc;
        bool _active_notes[128];
        uint8_t _highlighted_note;
        uint8_t _clicked_note;
        double _grab_y;
        bool _dragging;

        double _note_height;
        double _black_note_width;

        PublicEditor& editor() const;
};

#endif /* __ardour_piano_roll_header_h__ */