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livetrax/gtk2_ardour/note_base.h

160 lines
4.6 KiB
C++

/*
* 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 "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;
}
/** Base class for canvas notes (sustained note rectangles, percussive hit diamonds,
* and velocity lollipops)
*
* This is not actually a canvas item itself to avoid the dreaded diamond
* inheritance pattern, since various types of canvas items (Note (rect), Hit
* (diamond), etc) need to share this functionality but can't share an
* ancestor.
*
* Note: Because of this, derived classes need to manually bounce events to
* on_event, it won't happen automatically.
*/
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();
void show_velocity();
void hide_velocity();
/** Channel changed for this specific event */
void on_channel_change(uint8_t channel);
/** Channel selection changed */
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 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);
/// calculate outline colors from fill colors of notes
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);
}
}
/// hue circle divided into 16 equal-looking parts, courtesy Thorsten Wilms
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__ */