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/*
* Example program for the Allegro library, by Shawn Hargreaves.
*
* This program demonstrates how to access the keyboard.
*/
#include <stdio.h>
#include <string.h>
#include "allegro.h"
char *key_names[] =
{
"(none)", "KEY_A", "KEY_B", "KEY_C",
"KEY_D", "KEY_E", "KEY_F", "KEY_G",
"KEY_H", "KEY_I", "KEY_J", "KEY_K",
"KEY_L", "KEY_M", "KEY_N", "KEY_O",
"KEY_P", "KEY_Q", "KEY_R", "KEY_S",
"KEY_T", "KEY_U", "KEY_V", "KEY_W",
"KEY_X", "KEY_Y", "KEY_Z", "KEY_0",
"KEY_1", "KEY_2", "KEY_3", "KEY_4",
"KEY_5", "KEY_6", "KEY_7", "KEY_8",
"KEY_9", "KEY_0_PAD", "KEY_1_PAD", "KEY_2_PAD",
"KEY_3_PAD", "KEY_4_PAD", "KEY_5_PAD", "KEY_6_PAD",
"KEY_7_PAD", "KEY_8_PAD", "KEY_9_PAD", "KEY_F1",
"KEY_F2", "KEY_F3", "KEY_F4", "KEY_F5",
"KEY_F6", "KEY_F7", "KEY_F8", "KEY_F9",
"KEY_F10", "KEY_F11", "KEY_F12", "KEY_ESC",
"KEY_TILDE", "KEY_MINUS", "KEY_EQUALS", "KEY_BACKSPACE",
"KEY_TAB", "KEY_OPENBRACE", "KEY_CLOSEBRACE", "KEY_ENTER",
"KEY_COLON", "KEY_QUOTE", "KEY_BACKSLASH", "KEY_BACKSLASH2",
"KEY_COMMA", "KEY_STOP", "KEY_SLASH", "KEY_SPACE",
"KEY_INSERT", "KEY_DEL", "KEY_HOME", "KEY_END",
"KEY_PGUP", "KEY_PGDN", "KEY_LEFT", "KEY_RIGHT",
"KEY_UP", "KEY_DOWN", "KEY_SLASH_PAD", "KEY_ASTERISK",
"KEY_MINUS_PAD", "KEY_PLUS_PAD", "KEY_DEL_PAD", "KEY_ENTER_PAD",
"KEY_PRTSCR", "KEY_PAUSE", "KEY_ABNT_C1", "KEY_YEN",
"KEY_KANA", "KEY_CONVERT", "KEY_NOCONVERT", "KEY_AT",
"KEY_CIRCUMFLEX", "KEY_COLON2", "KEY_KANJI",
"KEY_LSHIFT", "KEY_RSHIFT", "KEY_LCONTROL", "KEY_RCONTROL",
"KEY_ALT", "KEY_ALTGR", "KEY_LWIN", "KEY_RWIN",
"KEY_MENU", "KEY_SCRLOCK", "KEY_NUMLOCK", "KEY_CAPSLOCK",
"KEY_MAX"
};
/* helper function for making more room on the screen */
void scroll(void)
{
blit(screen, screen, 0, 32, 0, 24, SCREEN_W, SCREEN_H-32);
rectfill(screen, 0, SCREEN_H-16, SCREEN_W, SCREEN_H, makecol(255, 255, 255));
}
int main(void)
{
char buf[128];
int k;
allegro_init();
install_keyboard();
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));
acquire_screen();
clear_to_color(screen, makecol(255, 255, 255));
textprintf_centre(screen, font, SCREEN_W/2, 8, makecol(0, 0, 0),
"Driver: %s", keyboard_driver->name);
/* keyboard input can be accessed with the readkey() function */
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Press some keys (ESC to finish)");
scroll();
do {
release_screen();
k = readkey();
acquire_screen();
scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"readkey() returned %-6d (0x%04X)", k, k);
} while ((k & 0xFF) != 27);
/* the ASCII code is in the low byte of the return value */
scroll(); scroll(); scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Press some more keys (ESC to finish)");
scroll();
do {
release_screen();
k = readkey();
acquire_screen();
scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"ASCII code is %d", k&0xFF);
} while ((k&0xFF) != 27);
/* the hardware scancode is in the high byte of the return value */
scroll(); scroll(); scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Press some more keys (ESC to finish)");
scroll();
do {
release_screen();
k = readkey();
acquire_screen();
scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Scancode is %d (%s)", k>>8, key_names[k>>8]);
} while ((k&0xFF) != 27);
/* key qualifiers are stored in the key_shifts variable. Note that this
* version of the code uses ureadkey() instead of readkey(): that is
* necessary if you want to access Unicode characters from outside
* the normal ASCII range, for example to support Russian or Chinese.
*/
scroll(); scroll(); scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Press some more keys (ESC to finish)");
scroll();
do {
release_screen();
k = ureadkey(NULL);
acquire_screen();
buf[0] = 0;
if (key_shifts & KB_SHIFT_FLAG) strcat(buf, "shift ");
if (key_shifts & KB_CTRL_FLAG) strcat(buf, "ctrl ");
if (key_shifts & KB_ALT_FLAG) strcat(buf, "alt ");
if (key_shifts & KB_LWIN_FLAG) strcat(buf, "lwin ");
if (key_shifts & KB_RWIN_FLAG) strcat(buf, "rwin ");
if (key_shifts & KB_MENU_FLAG) strcat(buf, "menu ");
usprintf(buf+strlen(buf), "'%c' [0x%02x]", k ? k : ' ', k);
if (key_shifts & KB_CAPSLOCK_FLAG) strcat(buf, " caps");
if (key_shifts & KB_NUMLOCK_FLAG) strcat(buf, " num");
if (key_shifts & KB_SCROLOCK_FLAG) strcat(buf, " scrl");
scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0), buf);
} while (k != 27);
/* various scancodes are defined in allegro.h as KEY_* constants */
scroll(); scroll(); scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0), "Press F6");
scroll();
release_screen();
k = readkey();
acquire_screen();
while ((k>>8) != KEY_F6) {
scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Wrong key, stupid! I said press F6");
release_screen();
k = readkey();
acquire_screen();
}
/* for detecting multiple simultaneous keypresses, use the key[] array */
scroll(); scroll(); scroll();
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0),
"Press a combination of numbers");
scroll(); scroll();
release_screen();
do {
if (key[KEY_0]) buf[0] = '0'; else buf[0] = ' ';
if (key[KEY_1]) buf[1] = '1'; else buf[1] = ' ';
if (key[KEY_2]) buf[2] = '2'; else buf[2] = ' ';
if (key[KEY_3]) buf[3] = '3'; else buf[3] = ' ';
if (key[KEY_4]) buf[4] = '4'; else buf[4] = ' ';
if (key[KEY_5]) buf[5] = '5'; else buf[5] = ' ';
if (key[KEY_6]) buf[6] = '6'; else buf[6] = ' ';
if (key[KEY_7]) buf[7] = '7'; else buf[7] = ' ';
if (key[KEY_8]) buf[8] = '8'; else buf[8] = ' ';
if (key[KEY_9]) buf[9] = '9'; else buf[9] = ' ';
buf[10] = 0;
textprintf(screen, font, 8, SCREEN_H-16, makecol(0, 0, 0), buf);
} while (!key[KEY_ESC]);
clear_keybuf();
return 0;
}
END_OF_MAIN();
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