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/*
* Copyright © 2012 Keith Packard <keithp@keithp.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; version 2 of the License.
*
* 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
autoload Nichrome;
autoload Mutex;
extend namespace Nichrome {
public namespace Timer {
public typedef widget_t + struct {
Mutex::mutex lock;
bool running;
bool visible;
int end;
thread timer;
} timer_t;
void draw (cairo_t cr, &timer_t widget) {
if (!widget.visible)
return;
real left;
if (widget.running) {
left = (widget.end - millis()) / 1000;
if (left < 0)
left = 0;
if (left > 60)
left = 60;
} else
left = 0;
real filled = 60 - left;
save (cr);
scale (cr, widget.geometry.width / 2, widget.geometry.height / 2);
move_to (cr, 1, 1);
arc (cr,
1, 1, /* center */
0.9, /* radius */
- π / 2, /* start angle */
2 * π * (filled) / 60.0 - π/2); /* end angle */
close_path (cr);
set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
fill (cr);
restore (cr);
}
void run_timer (&timer_t widget) {
twixt(Mutex::acquire(widget.lock); Mutex::release(widget.lock)) {
try {
while ((int now = millis()) <= widget.end) {
int delay = (widget.end - now) % 100;
if (delay == 0)
delay = 100;
twixt(Mutex::release(widget.lock); Mutex::acquire(widget.lock)) {
sleep(delay);
Widget::redraw(&widget);
}
}
} catch Thread::signal (int sig) {
}
widget.running = false;
}
}
void start_timer (&timer_t widget) {
twixt(Mutex::acquire(widget.lock); Mutex::release(widget.lock)) {
}
}
protected void set_timer (&timer_t widget, real time) {
twixt(Mutex::acquire(widget.lock); Mutex::release(widget.lock)) {
widget.visible = true;
widget.end = millis() + floor (time * 1000 + 0.5);
if (!widget.running) {
widget.running = true;
widget.timer = fork run_timer(&widget);
}
}
}
protected void stop_timer (&timer_t widget) {
widget.end = millis();
twixt(Mutex::acquire(widget.lock); Mutex::release(widget.lock)) {
if (widget.running)
Thread::send_signal(widget.timer, 0);
}
}
protected void hide(&timer_t widget) {
widget.visible = false;
}
protected void show(&timer_t widget) {
widget.visible = true;
}
void outline (cairo_t cr, &timer_t widget) {
rectangle(cr, 0, 0, 0, 0);
}
void natural (cairo_t cr, &timer_t widget) {
rectangle(cr, 0, 0, 100, 100);
}
protected void init(*nichrome_t nichrome, &timer_t widget) {
Widget::init(nichrome, &widget);
widget.draw = draw;
widget.outline = outline;
widget.natural = natural;
widget.lock = Mutex::new();
widget.running = false;
widget.visible = false;
}
protected *timer_t new(*nichrome_t nichrome) {
&timer_t widget = &(timer_t) {};
init(nichrome, &widget);
return &widget;
}
}
}
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