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/*
Copyright (C) 2010 Paul Davis
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.
*/
#include <iostream>
#include <cmath>
#include <algorithm>
#include "led.h"
using namespace Gdk;
using namespace Gtk;
using namespace Glib;
LED::LED()
: _visual_state (0)
, _active (false)
, _red (0.0)
, _green (1.0)
, _blue (0.0)
{
}
LED::~LED()
{
}
void
LED::render (cairo_t* cr)
{
float diameter = std::min (_width, _height);
//background
cairo_rectangle(cr, 0, 0, _width, _height);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_fill(cr);
cairo_translate(cr, _width/2, _height/2);
#if 0
//inset
cairo_pattern_t *pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter);
cairo_pattern_add_color_stop_rgba (pat, 0, 0,0,0, 0.4);
cairo_pattern_add_color_stop_rgba (pat, 1, 1,1,1, 0.7);
cairo_arc (cr, 0, 0, diameter/2, 0, 2 * M_PI);
cairo_set_source (cr, pat);
cairo_fill (cr);
cairo_pattern_destroy (pat);
//black ring
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_arc (cr, 0, 0, diameter/2-2, 0, 2 * M_PI);
cairo_fill(cr);
//knob color
cairo_set_source_rgba (cr, _red, _green, _blue, _active ? 0.8 : 0.2);
cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
cairo_fill(cr);
//reflection
cairo_scale(cr, 0.7, 0.7);
cairo_pattern_t *pat2 = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter/2-3);
cairo_pattern_add_color_stop_rgba (pat2, 0, 1,1,1, _active ? 0.4 : 0.2);
cairo_pattern_add_color_stop_rgba (pat2, 1, 1,1,1, 0.0);
cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
cairo_set_source (cr, pat2);
cairo_fill (cr);
cairo_pattern_destroy (pat2);
#endif
cairo_set_source_rgba (cr, _red, _green, _blue, 1.0);
cairo_arc (cr, 0, 0, diameter/2-5, 0, 2 * M_PI);
cairo_fill(cr);
cairo_stroke (cr);
}
void
LED::set_visual_state (int32_t s)
{
if (s != _visual_state) {
_visual_state = s;
RefPtr<Style> style = get_style();
Color c;
switch (_visual_state) {
case 0:
c = style->get_fg (STATE_NORMAL);
break;
default:
c = style->get_fg (STATE_ACTIVE);
break;
}
_red = c.get_red_p ();
_green = c.get_green_p ();
_blue = c.get_blue_p ();
set_dirty ();
}
}
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