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/*
* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
*
* 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, 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_surfaces_m2button_h_
#define _ardour_surfaces_m2button_h_
#include <stdint.h>
#include "gtkmm2ext/colors.h"
#include "pbd/signals.h"
namespace ArdourSurface {
class M2ButtonInterface
{
public:
M2ButtonInterface () {}
virtual ~M2ButtonInterface () {}
/* user API */
PBD::Signal1<void, bool> changed;
PBD::Signal0<void> pressed;
PBD::Signal0<void> released;
virtual void set_blinking (bool) {}
virtual void set_color (uint32_t rgba) {}
virtual bool is_pressed () const { return false; }
virtual bool active () const { return is_pressed (); }
virtual void ignore_release () {}
// TODO allow to suspend *next* release signal
// e.g. press + hold "grid", move encoder -> release "grid" -> noop
/* internal API - called from device thread */
virtual bool set_active (bool a) { return false; }
virtual uint8_t lightness (float) const { return 0; }
virtual uint32_t color (float) const { return 0; }
};
class M2Button : public M2ButtonInterface
{
public:
M2Button ()
: M2ButtonInterface ()
, _pressed (false)
, _blink (false)
, _ignore_release (false)
, _lightness (0)
, _rgba (0)
{}
/* user API */
void set_blinking (bool en) {
_blink = en;
}
virtual void set_color (uint32_t rgba) {
_rgba = rgba;
/* 7 bit color */
const uint8_t r = ((rgba >> 24) & 0xff) >> 1;
const uint8_t g = ((rgba >> 16) & 0xff) >> 1;
const uint8_t b = ((rgba >> 8) & 0xff) >> 1;
_lightness = std::max (r, std::max (g, b));
}
bool is_pressed () const { return _pressed; }
void ignore_release () {
if (_pressed) {
_ignore_release = true;
}
}
/* internal API - called from device thread */
virtual bool set_active (bool a) {
if (a == _pressed) {
return false;
}
_pressed = a;
if (a) {
pressed (); /* EMIT SIGNAL */
} else {
if (_ignore_release) {
_ignore_release = false;
} else {
released (); /* EMIT SIGNAL */
}
}
changed (a); /* EMIT SIGNAL */
return true;
}
uint8_t lightness (float blink) const {
if (_blink && blink >= 0.f && blink <= 1.f) {
return (uint8_t) floorf(blink * _lightness);
}
return _lightness;
}
uint32_t color (float blink) const {
if (_blink && blink >= 0.f && blink <= 1.f) {
Gtkmm2ext::HSV hsv (_rgba);
Gtkmm2ext::HSV s (hsv.shade (blink));
return s.color();
}
return _rgba;
}
protected:
bool _pressed;
bool _blink;
bool _ignore_release;
uint8_t _lightness;
uint32_t _rgba;
};
class M2StatelessButton : public M2Button
{
public:
M2StatelessButton () : M2Button () {}
bool set_active (bool a) {
if (a == _pressed) {
return false;
}
if (a) {
set_color (0xffffffff);
} else {
set_color (0x000000ff);
}
return M2Button::set_active (a);
}
};
class M2ToggleButton : public M2Button
{
public:
M2ToggleButton ()
: M2Button ()
, _active (false)
{
changed.connect_same_thread (changed_connection, boost::bind (&M2ToggleButton::change_event, this, _1));
}
PBD::Signal1<void, bool> toggled;
bool active () const { return _active; }
protected:
void change_event (bool down) {
if (down) { return; }
_active = !_active;
set_color (_active ? 0xffffffff : 0x000000ff);
toggled (_active);
}
PBD::ScopedConnection changed_connection;
bool _active;
};
class M2ToggleHoldButton : public M2Button
{
public:
M2ToggleHoldButton ()
: M2Button ()
, _active (false)
, _active_on_release (false)
{
changed.connect_same_thread (changed_connection, boost::bind (&M2ToggleHoldButton::change_event, this, _1));
}
PBD::Signal1<void, bool> toggled;
bool active () const { return _active; }
void unset_active_on_release () { if (is_pressed ()) { _active_on_release = false; } }
protected:
void change_event (bool down) {
if (down) {
if (_active) {
_active_on_release = false;
return;
}
_active = true;
_active_on_release = true;
} else {
if (_active == _active_on_release) {
return;
}
_active = _active_on_release;
}
set_color (_active ? 0xffffffff : 0x000000ff);
toggled (_active);
}
PBD::ScopedConnection changed_connection;
bool _active;
bool _active_on_release;
};
} /* namespace */
#endif /* _ardour_surfaces_m2button_h_ */
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