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/*
* Example program for the Allegro library, by Peter Wang.
*
* Test timed version of al_wait_for_event().
*/
#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
#include "common.c"
static bool test_relative_timeout(ALLEGRO_FONT *font, ALLEGRO_EVENT_QUEUE *queue);
static bool test_absolute_timeout(ALLEGRO_FONT *font, ALLEGRO_EVENT_QUEUE *queue);
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *dpy;
ALLEGRO_EVENT_QUEUE *queue;
ALLEGRO_FONT *font;
(void)argc;
(void)argv;
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
if (!al_init_font_addon()) {
abort_example("Could not init Font addon.\n");
}
al_install_keyboard();
dpy = al_create_display(640, 480);
if (!dpy) {
abort_example("Could not create a display.\n");
}
font = al_create_builtin_font();
if (!font) {
abort_example("Could not create builtin font.\n");
}
queue = al_create_event_queue();
al_register_event_source(queue, al_get_keyboard_event_source());
al_register_event_source(queue, al_get_display_event_source(dpy));
while (true) {
if (!test_relative_timeout(font, queue))
break;
if (!test_absolute_timeout(font, queue))
break;
}
return 0;
}
static bool test_relative_timeout(ALLEGRO_FONT *font, ALLEGRO_EVENT_QUEUE *queue)
{
ALLEGRO_EVENT event;
float shade = 0.1;
while (true) {
if (al_wait_for_event_timed(queue, &event, 0.1)) {
if (event.type == ALLEGRO_EVENT_KEY_DOWN) {
if (event.keyboard.keycode == ALLEGRO_KEY_ESCAPE) {
return true;
}
else {
shade = 0.0;
}
}
else if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
return false;
}
}
else {
/* timed out */
shade += 0.1;
if (shade > 1.0)
shade = 1.0;
}
al_clear_to_color(al_map_rgba_f(0.5 * shade, 0.25 * shade, shade, 0));
al_draw_textf(font, al_map_rgb_f(1., 1., 1.), 320, 240, ALLEGRO_ALIGN_CENTRE, "Relative timeout (%.2f)", shade);
al_draw_text(font, al_map_rgb_f(1., 1., 1.), 320, 260, ALLEGRO_ALIGN_CENTRE, "Esc to move on, Space to restart.");
al_flip_display();
}
}
static bool test_absolute_timeout(ALLEGRO_FONT *font, ALLEGRO_EVENT_QUEUE *queue)
{
ALLEGRO_TIMEOUT timeout;
ALLEGRO_EVENT event;
float shade = 0.1;
bool ret;
while (true) {
al_init_timeout(&timeout, 0.1);
while ((ret = al_wait_for_event_until(queue, &event, &timeout))) {
if (event.type == ALLEGRO_EVENT_KEY_DOWN) {
if (event.keyboard.keycode == ALLEGRO_KEY_ESCAPE) {
return true;
} else {
shade = 0.;
}
}
else if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
return false;
}
}
if (!ret) {
/* timed out */
shade += 0.1;
if (shade > 1.0)
shade = 1.0;
}
al_clear_to_color(al_map_rgba_f(shade, 0.5 * shade, 0.25 * shade, 0));
al_draw_textf(font, al_map_rgb_f(1., 1., 1.), 320, 240, ALLEGRO_ALIGN_CENTRE, "Absolute timeout (%.2f)", shade);
al_draw_text(font, al_map_rgb_f(1., 1., 1.), 320, 260, ALLEGRO_ALIGN_CENTRE, "Esc to move on, Space to restart.");
al_flip_display();
}
}
/* vi: set sts=3 sw=3 et: */
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