121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
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/*
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Copyright (C) 2010 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <iostream>
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#include <cmath>
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#include <algorithm>
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#include "led.h"
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using namespace Gdk;
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using namespace Gtk;
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using namespace Glib;
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LED::LED()
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: _visual_state (0)
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, _active (false)
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, _red (0.0)
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, _green (1.0)
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, _blue (0.0)
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{
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}
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LED::~LED()
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{
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}
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void
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LED::render (cairo_t* cr)
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{
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float diameter = std::min (_width, _height);
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//background
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cairo_rectangle(cr, 0, 0, _width, _height);
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cairo_stroke_preserve(cr);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_fill(cr);
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cairo_translate(cr, _width/2, _height/2);
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#if 0
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//inset
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cairo_pattern_t *pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter);
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cairo_pattern_add_color_stop_rgba (pat, 0, 0,0,0, 0.4);
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cairo_pattern_add_color_stop_rgba (pat, 1, 1,1,1, 0.7);
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cairo_arc (cr, 0, 0, diameter/2, 0, 2 * M_PI);
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cairo_set_source (cr, pat);
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cairo_fill (cr);
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cairo_pattern_destroy (pat);
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//black ring
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_arc (cr, 0, 0, diameter/2-2, 0, 2 * M_PI);
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cairo_fill(cr);
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//knob color
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cairo_set_source_rgba (cr, _red, _green, _blue, _active ? 0.8 : 0.2);
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cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
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cairo_fill(cr);
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//reflection
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cairo_scale(cr, 0.7, 0.7);
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cairo_pattern_t *pat2 = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter/2-3);
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cairo_pattern_add_color_stop_rgba (pat2, 0, 1,1,1, _active ? 0.4 : 0.2);
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cairo_pattern_add_color_stop_rgba (pat2, 1, 1,1,1, 0.0);
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cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
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cairo_set_source (cr, pat2);
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cairo_fill (cr);
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cairo_pattern_destroy (pat2);
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#endif
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cairo_set_source_rgba (cr, _red, _green, _blue, 1.0);
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cairo_arc (cr, 0, 0, diameter/2-5, 0, 2 * M_PI);
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cairo_fill(cr);
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cairo_stroke (cr);
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}
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void
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LED::set_visual_state (int32_t s)
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{
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if (s != _visual_state) {
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_visual_state = s;
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RefPtr<Style> style = get_style();
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Color c;
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switch (_visual_state) {
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case 0:
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c = style->get_fg (STATE_NORMAL);
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break;
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default:
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c = style->get_fg (STATE_ACTIVE);
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break;
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}
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_red = c.get_red_p ();
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_green = c.get_green_p ();
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_blue = c.get_blue_p ();
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set_dirty ();
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}
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}
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