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/*
* ex_window_maximized.c - create the maximized, resizable window.
* Press SPACE to change constraints.
*/
#include <allegro5/allegro.h>
#include <allegro5/allegro_primitives.h>
#include <allegro5/allegro_native_dialog.h>
#include <allegro5/allegro_image.h>
#include <allegro5/allegro_font.h>
#include <allegro5/allegro_ttf.h>
#include "common.c"
#define DISPLAY_W 640
#define DISPLAY_H 480
/* comment out to use GTK backend */
/* #define USE_GTK */
static void
draw_information(ALLEGRO_DISPLAY *display,
ALLEGRO_FONT *font, ALLEGRO_COLOR color);
static bool use_constraints;
extern int
main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display;
ALLEGRO_EVENT_QUEUE *queue;
ALLEGRO_FONT *font;
bool done = false;
bool redraw = true;
use_constraints = true;
(void)argc;
(void)argv;
if (!al_init()) {
abort_example("Failed to init Allegro.\n");
}
if (!al_init_primitives_addon()) {
abort_example("Failed to init primitives addon.\n");
}
if (!al_init_image_addon()) {
abort_example("Failed to init image addon.\n");
}
if (!al_init_font_addon()) {
abort_example("Failed to init font addon.\n");
}
if (!al_init_native_dialog_addon()) {
abort_example("Failed to init native dialog addon.\n");
}
al_set_new_display_flags(ALLEGRO_WINDOWED
#if defined(USE_GTK) && !defined(_WIN32)
| ALLEGRO_GTK_TOPLEVEL
#endif
| ALLEGRO_RESIZABLE | ALLEGRO_MAXIMIZED
| ALLEGRO_GENERATE_EXPOSE_EVENTS);
/* creating really small display */
display = al_create_display(DISPLAY_W / 3, DISPLAY_H / 3);
if (!display) {
abort_example("Error creating display.\n");
}
/* set lower limits for constraints only */
if(!al_set_window_constraints(display, DISPLAY_W / 2, DISPLAY_H / 2, 0, 0))
abort_example("Unable to set window constraints.\n");
al_apply_window_constraints(display, use_constraints);
if (!al_install_keyboard()) {
abort_example("Error installing keyboard.\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(display));
ALLEGRO_COLOR color_1 = al_map_rgb(255, 127, 0);
ALLEGRO_COLOR color_2 = al_map_rgb(0, 255, 0);
ALLEGRO_COLOR *color = &color_1;
ALLEGRO_COLOR color_text = al_map_rgb(0, 0, 0);
font = al_create_builtin_font();
while (!done) {
ALLEGRO_EVENT event;
if (redraw && al_is_event_queue_empty(queue)) {
redraw = false;
int x2 = al_get_display_width(display) - 10;
int y2 = al_get_display_height(display) - 10;
al_clear_to_color(al_map_rgb(0, 0, 0));
al_draw_filled_rectangle(10, 10, x2, y2, *color);
draw_information(display, font, color_text);
al_flip_display();
}
al_wait_for_event(queue, &event);
switch (event.type) {
case ALLEGRO_EVENT_KEY_DOWN:
if (event.keyboard.keycode == ALLEGRO_KEY_ESCAPE)
done = true;
break;
case ALLEGRO_EVENT_KEY_UP:
if (event.keyboard.keycode == ALLEGRO_KEY_SPACE) {
redraw = true;
if (color == &color_1) {
if (!al_set_window_constraints(display,
0, 0,
DISPLAY_W, DISPLAY_H))
{
abort_example("Unable to set window constraints.\n");
}
color = &color_2;
}
else {
if (!al_set_window_constraints(display,
DISPLAY_W / 2, DISPLAY_H / 2,
0, 0))
{
abort_example("Unable to set window constraints.\n");
}
color = &color_1;
}
al_apply_window_constraints(display, use_constraints);
}
else if (event.keyboard.keycode == ALLEGRO_KEY_ENTER) {
redraw = true;
use_constraints = !use_constraints;
al_apply_window_constraints(display, use_constraints);
}
break;
case ALLEGRO_EVENT_DISPLAY_RESIZE:
al_acknowledge_resize(event.display.source);
redraw = true;
break;
case ALLEGRO_EVENT_DISPLAY_EXPOSE:
redraw = true;
break;
case ALLEGRO_EVENT_DISPLAY_CLOSE:
done = true;
break;
} /* switch (event.type) { */
}
al_destroy_font(font);
return 0;
}
static void
draw_information(ALLEGRO_DISPLAY *display,
ALLEGRO_FONT *font, ALLEGRO_COLOR color)
{
int min_w, min_h, max_w, max_h;
al_draw_textf(font, color, 20, 20, 0, "Hotkeys:");
al_draw_textf(font, color, 30, 30, 0, "enabled/disable constraints: ENTER");
al_draw_textf(font, color, 30, 40, 0, "change constraints: SPACE");
al_draw_textf(font, color, 20, 50, 0,
"Resolution: %dx%d",
al_get_display_width(display),
al_get_display_height(display));
if (al_get_window_constraints(display, &min_w, &min_h, &max_w, &max_h)) {
al_draw_textf(font, color, 20, 60, 0, "Constraints: %s",
use_constraints ? "Enabled" : "Disabled");
al_draw_textf(font, color, 20, 70, 0, "min_w = %d min_h = %d",
min_w, min_h);
al_draw_textf(font, color, 20, 80, 0, "max_w = %d max_h = %d",
max_w, max_h);
}
}
/* vim: set sts=3 sw=3 et: */
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