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/*
* Example program for the Allegro library, by Peter Wang.
*/
#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
#include "allegro5/allegro_image.h"
#include "common.c"
typedef struct {
int system_cursor;
const char *label;
} CursorList;
#define MARGIN_LEFT 20
#define MARGIN_TOP 20
#define NUM_CURSORS 20
CursorList cursor_list[NUM_CURSORS] =
{
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT, "DEFAULT" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_ARROW, "ARROW" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_BUSY, "BUSY" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_QUESTION, "QUESTION" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_EDIT, "EDIT" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_MOVE, "MOVE" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_N, "RESIZE_N" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_W, "RESIZE_W" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_S, "RESIZE_S" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E, "RESIZE_E" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW, "RESIZE_NW" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_SW, "RESIZE_SW" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_SE, "RESIZE_SE" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE, "RESIZE_NE" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_PROGRESS, "PROGRESS" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_PRECISION, "PRECISION" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_LINK, "LINK" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_ALT_SELECT, "ALT_SELECT" },
{ ALLEGRO_SYSTEM_MOUSE_CURSOR_UNAVAILABLE, "UNAVAILABLE" },
{ -1, "CUSTOM" }
};
int current_cursor[2] = { 0, 0 };
static void draw_display(ALLEGRO_FONT *font)
{
int th;
int i;
al_clear_to_color(al_map_rgb(128, 128, 128));
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_INVERSE_ALPHA);
th = al_get_font_line_height(font);
for (i = 0; i < NUM_CURSORS; i++) {
al_draw_text(font, al_map_rgba_f(0, 0, 0, 1),
MARGIN_LEFT, MARGIN_TOP + i * th, 0, cursor_list[i].label);
}
i++;
al_draw_text(font, al_map_rgba_f(0, 0, 0, 1),
MARGIN_LEFT, MARGIN_TOP + i * th, 0,
"Press S/H to show/hide cursor");
al_flip_display();
}
static int hover(ALLEGRO_FONT *font, int y)
{
int th;
int i;
if (y < MARGIN_TOP)
return -1;
th = al_get_font_line_height(font);
i = (y - MARGIN_TOP) / th;
if (i < NUM_CURSORS)
return i;
return -1;
}
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display1;
ALLEGRO_DISPLAY *display2;
ALLEGRO_BITMAP *bmp;
ALLEGRO_BITMAP *shrunk_bmp;
ALLEGRO_MOUSE_CURSOR *custom_cursor;
ALLEGRO_EVENT_QUEUE *queue;
ALLEGRO_FONT *font;
ALLEGRO_EVENT event;
(void)argc;
(void)argv;
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
al_init_image_addon();
init_platform_specific();
if (!al_install_mouse()) {
abort_example("Error installing mouse\n");
}
if (!al_install_keyboard()) {
abort_example("Error installing keyboard\n");
}
al_set_new_display_flags(ALLEGRO_GENERATE_EXPOSE_EVENTS);
display1 = al_create_display(400, 400);
if (!display1) {
abort_example("Error creating display1\n");
}
display2 = al_create_display(400, 400);
if (!display2) {
abort_example("Error creating display2\n");
}
bmp = al_load_bitmap("data/allegro.pcx");
if (!bmp) {
abort_example("Error loading data/allegro.pcx\n");
}
font = al_load_bitmap_font("data/fixed_font.tga");
if (!font) {
abort_example("Error loading data/fixed_font.tga\n");
}
shrunk_bmp = al_create_bitmap(32, 32);
if (!shrunk_bmp) {
abort_example("Error creating shrunk_bmp\n");
}
al_set_target_bitmap(shrunk_bmp);
al_draw_scaled_bitmap(bmp,
0, 0, al_get_bitmap_width(bmp), al_get_bitmap_height(bmp),
0, 0, 32, 32,
0);
custom_cursor = al_create_mouse_cursor(shrunk_bmp, 0, 0);
if (!custom_cursor) {
abort_example("Error creating mouse cursor\n");
}
al_set_target_bitmap(NULL);
al_destroy_bitmap(shrunk_bmp);
al_destroy_bitmap(bmp);
shrunk_bmp = NULL;
bmp = NULL;
queue = al_create_event_queue();
if (!queue) {
abort_example("Error creating event queue\n");
}
al_register_event_source(queue, al_get_keyboard_event_source());
al_register_event_source(queue, al_get_mouse_event_source());
al_register_event_source(queue, al_get_display_event_source(display1));
al_register_event_source(queue, al_get_display_event_source(display2));
al_set_target_backbuffer(display1);
draw_display(font);
al_set_target_backbuffer(display2);
draw_display(font);
while (1) {
al_wait_for_event(queue, &event);
if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
break;
}
if (event.type == ALLEGRO_EVENT_DISPLAY_EXPOSE) {
al_set_target_backbuffer(event.display.source);
draw_display(font);
continue;
}
if (event.type == ALLEGRO_EVENT_KEY_CHAR) {
switch (event.keyboard.unichar) {
case 27: /* escape */
goto Quit;
case 'h':
al_hide_mouse_cursor(event.keyboard.display);
break;
case 's':
al_show_mouse_cursor(event.keyboard.display);
break;
default:
break;
}
}
if (event.type == ALLEGRO_EVENT_MOUSE_AXES) {
int dpy = (event.mouse.display == display1) ? 0 : 1;
int i = hover(font, event.mouse.y);
if (i >= 0 && current_cursor[dpy] != i) {
if (cursor_list[i].system_cursor != -1) {
al_set_system_mouse_cursor(event.mouse.display,
cursor_list[i].system_cursor);
}
else {
al_set_mouse_cursor(event.mouse.display, custom_cursor);
}
current_cursor[dpy] = i;
}
}
}
Quit:
al_destroy_mouse_cursor(custom_cursor);
return 0;
}
/* vim: set sts=3 sw=3 et: */
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