note_base.h

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/*
    Copyright (C) 2007 Paul Davis
    Author: David Robillard

    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 __gtk_ardour_note_base_h__
#define __gtk_ardour_note_base_h__

#include <boost/shared_ptr.hpp>

#include "canvas/types.h"
#include "evoral/types.hpp"

#include "rgb_macros.h"
#include "ardour_ui.h"
#include "ui_config.h"

class Editor;
class MidiRegionView;

namespace Evoral {
        template<typename T> class Note;
}

namespace ArdourCanvas {
        class Item;
        class Text;
}

class NoteBase : public sigc::trackable
{
  public:
        typedef Evoral::Note<Evoral::Beats> NoteType;

        NoteBase (MidiRegionView& region, bool, const boost::shared_ptr<NoteType> note = boost::shared_ptr<NoteType>());
        virtual ~NoteBase ();

        void set_item (ArdourCanvas::Item *);
        ArdourCanvas::Item* item() const { return _item; }

        static PBD::Signal1<void, NoteBase*> NoteBaseDeleted;

        virtual void show() = 0;
        virtual void hide() = 0;

        bool valid() const { return _valid; }
        void invalidate ();
        void validate ();

        bool selected() const { return _selected; }
        void set_selected(bool yn);

        virtual void move_event(double dx, double dy) = 0;

        uint32_t base_color();

        void show_velocity();
        void hide_velocity();

        void on_channel_change(uint8_t channel);

        void on_channel_selection_change(uint16_t selection);

        virtual void set_outline_color(uint32_t c) = 0;
        virtual void set_fill_color(uint32_t c) = 0;

        virtual void set_ignore_events(bool ignore) = 0;

        virtual ArdourCanvas::Coord x0 () const = 0;
        virtual ArdourCanvas::Coord y0 () const = 0;
        virtual ArdourCanvas::Coord x1 () const = 0;
        virtual ArdourCanvas::Coord y1 () const = 0;

        float mouse_x_fraction() const { return _mouse_x_fraction; }
        float mouse_y_fraction() const { return _mouse_y_fraction; }

        const boost::shared_ptr<NoteType> note() const { return _note; }
        MidiRegionView& region_view() const { return _region; }

        inline static uint32_t meter_style_fill_color(uint8_t vel, bool selected) {
                if (selected) {
                        return ARDOUR_UI::config()->color_mod ("midi note selected", "midi note");
                } else if (vel < 64) {
                        return UINT_INTERPOLATE(
                                ARDOUR_UI::config()->color_mod ("midi note min", "midi note"),
                                ARDOUR_UI::config()->color_mod ("midi note mid", "midi note"),
                                (vel / (double)63.0));
                } else {
                        return UINT_INTERPOLATE(
                                ARDOUR_UI::config()->color_mod ("midi note mid", "midi note"),
                                ARDOUR_UI::config()->color_mod ("midi note max", "midi note"),
                                ((vel-64) / (double)63.0));
                }
        }

        inline static uint32_t calculate_outline(uint32_t color, bool selected=false) {
                if (selected) {
                        return ARDOUR_UI::config()->color ("midi note selected outline");
                } else {
                        return UINT_INTERPOLATE(color, 0x000000ff, 0.5);
                }
        }

        static const uint32_t midi_channel_colors[16];

        bool mouse_near_ends () const;
        virtual bool big_enough_to_trim () const;

protected:
        enum State { None, Pressed, Dragging };

        MidiRegionView&                   _region;
        ArdourCanvas::Item*               _item;
        ArdourCanvas::Text*               _text;
        State                             _state;
        const boost::shared_ptr<NoteType> _note;
        bool                              _with_events;
        bool                              _own_note;
        bool                              _selected;
        bool                              _valid;
        float                             _mouse_x_fraction;
        float                             _mouse_y_fraction;
        
        void set_mouse_fractions (GdkEvent*);

private:
        bool event_handler (GdkEvent *);
};

#endif /* __gtk_ardour_note_h__ */