note_base.h

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/*
 * Copyright (C) 2013-2018 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014-2015 David Robillard <d@drobilla.net>
 * Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.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 __gtk_ardour_note_base_h__
#define __gtk_ardour_note_base_h__
 
#include <memory>
 
#include "temporal/beats.h"
#include "canvas/types.h"
#include "gtkmm2ext/colors.h"
 
#include "ardour/types.h"
 
#include "rgb_macros.h"
#include "ui_config.h"
 
class Editor;
class MidiRegionView;
 
namespace Evoral {
        template<typename T> class Note;
        class Beats;
}
 
namespace ArdourCanvas {
        class Item;
        class Text;
}
 
class NoteBase : public sigc::trackable
{
  private:
        enum Flags {
                Selected = 0x1,
                HideSelection = 0x2,
        };
 
  public:
        typedef Evoral::Note<Temporal::Beats> NoteType;
 
        NoteBase (MidiRegionView& region, bool, const std::shared_ptr<NoteType> note = std::shared_ptr<NoteType>());
        virtual ~NoteBase ();
 
        void set_item (ArdourCanvas::Item *);
        ArdourCanvas::Item* item() const { return _item; }
 
        virtual void show() = 0;
        virtual void hide() = 0;
 
        bool valid() const { return _valid; }
        void invalidate ();
        void validate ();
 
        bool selected() const { return _flags & Selected; }
        void set_selected(bool yn);
        void set_hide_selection (bool yn);
 
        virtual void move_event(double dx, double dy) = 0;
 
        uint32_t base_color();
        static uint32_t base_color (int velocity, ARDOUR::ColorMode color_mode, Gtkmm2ext::Color, int channel, bool selected);
 
        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;
 
        virtual void set_velocity (double) {}
        virtual double visual_velocity() const = 0;
 
        float mouse_x_fraction() const { return _mouse_x_fraction; }
        float mouse_y_fraction() const { return _mouse_y_fraction; }
 
        const std::shared_ptr<NoteType> note() const { return _note; }
        MidiRegionView& region_view() const { return _region; }
 
        static void set_colors ();
 
        static Gtkmm2ext::Color meter_style_fill_color(uint8_t vel, bool selected);
 
        inline static uint32_t calculate_outline(uint32_t color, bool showing_selection = false) {
                if (showing_selection) {
                        return _selected_col;
                } 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 std::shared_ptr<NoteType>   _note;
        bool                              _with_events;
        bool                              _own_note;
        Flags                             _flags;
        bool                              _valid;
        float                             _mouse_x_fraction;
        float                             _mouse_y_fraction;
 
        void set_mouse_fractions (GdkEvent*);
 
private:
        bool event_handler (GdkEvent *);
 
        static Gtkmm2ext::Color _selected_col;
        static Gtkmm2ext::SVAModifier color_modifier;
        static Gtkmm2ext::Color velocity_color_table[128];
        static bool _color_init;
};
 
#endif /* __gtk_ardour_note_h__ */