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/*
* Example program for the Allegro library, by Shawn Hargreaves.
*
* This program demonstrates how to get mouse input.
*/
#include <stdio.h>
#include "allegro.h"
int main()
{
int mickeyx = 0;
int mickeyy = 0;
BITMAP *custom_cursor;
char msg[80];
int c = 0;
allegro_init();
install_keyboard();
install_mouse();
install_timer();
if (set_gfx_mode(GFX_SAFE, 320, 200, 0, 0) != 0) {
set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);
allegro_message("Unable to set any graphic mode\n%s\n", allegro_error);
return 1;
}
set_palette(desktop_palette);
text_mode(makecol(255, 255, 255));
clear_to_color(screen, makecol(255, 255, 255));
textprintf_centre(screen, font, SCREEN_W/2, 8, makecol(0, 0, 0),
"Driver: %s", mouse_driver->name);
do {
/* On most platforms (eg. DOS) things will still work correctly
* without this call, but it is a good idea to include it in any
* programs that you want to be portable, because on some platforms
* you may not be able to get any mouse input without it.
*/
poll_mouse();
acquire_screen();
/* the mouse position is stored in the variables mouse_x and mouse_y */
sprintf(msg, "mouse_x = %-5d", mouse_x);
textout(screen, font, msg, 16, 48, makecol(0, 0, 0));
sprintf(msg, "mouse_y = %-5d", mouse_y);
textout(screen, font, msg, 16, 64, makecol(0, 0, 0));
/* or you can use this function to measure the speed of movement.
* Note that we only call it every fourth time round the loop:
* there's no need for that other than to slow the numbers down
* a bit so that you will have time to read them...
*/
c++;
if ((c & 3) == 0)
get_mouse_mickeys(&mickeyx, &mickeyy);
sprintf(msg, "mickey_x = %-7d", mickeyx);
textout(screen, font, msg, 16, 88, makecol(0, 0, 0));
sprintf(msg, "mickey_y = %-7d", mickeyy);
textout(screen, font, msg, 16, 104, makecol(0, 0, 0));
/* the mouse button state is stored in the variable mouse_b */
if (mouse_b & 1)
textout(screen, font, "left button is pressed ", 16, 128, makecol(0, 0, 0));
else
textout(screen, font, "left button not pressed", 16, 128, makecol(0, 0, 0));
if (mouse_b & 2)
textout(screen, font, "right button is pressed ", 16, 144, makecol(0, 0, 0));
else
textout(screen, font, "right button not pressed", 16, 144, makecol(0, 0, 0));
if (mouse_b & 4)
textout(screen, font, "middle button is pressed ", 16, 160, makecol(0, 0, 0));
else
textout(screen, font, "middle button not pressed", 16, 160, makecol(0, 0, 0));
/* the wheel position is stored in the variable mouse_z */
sprintf(msg, "mouse_z = %-5d", mouse_z);
textout(screen, font, msg, 16, 184, makecol(0, 0, 0));
release_screen();
vsync();
} while (!keypressed());
clear_keybuf();
/* To display a mouse pointer, call show_mouse(). There are several
* things you should be aware of before you do this, though. For one,
* it won't work unless you call install_timer() first. For another,
* you must never draw anything onto the screen while the mouse
* pointer is visible. So before you draw anything, be sure to turn
* the mouse off with show_mouse(NULL), and turn it back on again when
* you are done.
*/
clear_to_color(screen, makecol(255, 255, 255));
textout_centre(screen, font, "Press a key to change cursor",
SCREEN_W/2, SCREEN_H/2, makecol(0, 0, 0));
show_mouse(screen);
readkey();
show_mouse(NULL);
/* create a custom mouse cursor bitmap... */
custom_cursor = create_bitmap(32, 32);
clear_to_color(custom_cursor, bitmap_mask_color(screen));
for (c=0; c<8; c++)
circle(custom_cursor, 16, 16, c*2, palette_color[c]);
/* select the custom cursor and set the focus point to the middle of it */
set_mouse_sprite(custom_cursor);
set_mouse_sprite_focus(16, 16);
clear_to_color(screen, makecol(255, 255, 255));
textout_centre(screen, font, "Press a key to quit", SCREEN_W/2,
SCREEN_H/2, makecol(0, 0, 0));
show_mouse(screen);
readkey();
show_mouse(NULL);
destroy_bitmap(custom_cursor);
return 0;
}
END_OF_MAIN();
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