piano_roll_header.h

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/*
 * Copyright (C) 2008-2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2010-2012 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 instrument_info_change ();
 
        void note_range_changed();
        void set_note_highlight (uint8_t note);
 
        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:
        struct NoteName {
                std::string name;
                bool from_midnam;
        };
        NoteName note_names[128];
        bool have_note_names;
        void set_min_page_size(double page_size);
        void render_scroomer(Cairo::RefPtr<Cairo::Context>);
        NoteName get_note_name (int note);
 
        Gtk::Adjustment& _adj;
 
        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(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];
 
        Glib::RefPtr<Pango::Layout> _layout;
        Glib::RefPtr<Pango::Layout> _big_c_layout;
        Glib::RefPtr<Pango::Layout> _midnam_layout;
 
        Pango::FontDescription _font_descript;
        Pango::FontDescription _font_descript_big_c;
        Pango::FontDescription _font_descript_midnam;
        bool _active_notes[128];
        uint8_t _highlighted_note;
        uint8_t _clicked_note;
        double _grab_y;
        bool _dragging;
        double _scroomer_size;
        bool _scroomer_drag;
        double _old_y;
        double _fract;
        double _fract_top;
        double _raw_note_height;
        double _min_page_size;
        enum scr_pos {TOP, BOTTOM, MOVE, NONE};
        scr_pos _scroomer_state;
        scr_pos _scroomer_button_state;
        double _saved_top_val;
        double _saved_bottom_val;
        bool _mini_map_display;
        bool entered;
 
        double _note_height;
        double _old_av_note_height;
 
        PublicEditor& editor() const;
        bool show_scroomer () const;
};
 
#endif /* __ardour_piano_roll_header_h__ */