165 lines
3.7 KiB
C++
165 lines
3.7 KiB
C++
/*
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* Copyright (C) 2010-2012 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2011 David Robillard <d@drobilla.net>
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* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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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using namespace Gtkmm2ext;
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LED::LED()
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: _diameter (0.0)
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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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, _fixed_diameter (false)
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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::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t*)
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{
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cairo_t* cr = ctx->cobj();
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if (!_fixed_diameter) {
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_diameter = std::min (get_width(), get_height());
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}
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//background
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Widget* parent;
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RefPtr<Style> style;
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Gdk::Color c;
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parent = get_parent ();
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while (parent && !parent->get_has_window()) {
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parent = parent->get_parent();
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}
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if (parent && parent->get_has_window()) {
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style = parent->get_style ();
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c = style->get_bg (parent->get_state());
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} else {
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style = get_style ();
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c = style->get_bg (get_state());
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}
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#if 0
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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, c.get_red_p(), c.get_green_p(), c.get_blue_p());
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cairo_fill(cr);
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#endif
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cairo_translate(cr, get_width()/2, get_height()/2);
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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_state() == Gtkmm2ext::ExplicitActive) ? 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_state() ? 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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cairo_stroke (cr);
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}
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void
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LED::set_diameter (float d)
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{
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_diameter = (d*2) + 5.0;
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if (_diameter != 0.0) {
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_fixed_diameter = true;
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}
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set_dirty ();
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}
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void
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LED::on_realize ()
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{
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set_colors_from_style ();
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CairoWidget::on_realize ();
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}
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void
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LED::on_size_request (Gtk::Requisition* req)
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{
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if (_fixed_diameter) {
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req->width = _diameter;
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req->height = _diameter;
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} else {
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CairoWidget::on_size_request (req);
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}
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}
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void
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LED::set_colors_from_style ()
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{
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RefPtr<Style> style = get_style();
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Gdk::Color c;
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switch (_visual_state) {
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case VisualState(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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