From: "Andrew Davidson" <andrew AT lemure DOT freeserve DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Fast reading of multiple keypresses in Allegro
Date: Mon, 15 Feb 1999 20:26:35 -0000
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I'm a bit stuck trying to read a number of simultaneous key presses using
Allegro's key[] structure. The code goes roughly as follows:

if(keypressed()) {
    if(key[KEY_A]) set a flag;
    if(key[KEY_B]) set b flag;
    ...
    clear_keybuf();
}

So how can I get it to recognise that key 'a' may be held down continuously
whilst keys 'b' through 'z' are being pressed? Basically a funcition to sync
the key[] array with the current state of the keys pressed on the keyboard
is what I'm after. This function could be called at the start of the
if(keypressed()) section. BTW, does keypressed() respond only to the
depression of a key or is it constantly set if a key is held down? If not
I'll need some way to test if any keys are being currently held down too...

This all has to happen rather quickly and not make any noticable difference
to the speed of the overall program.

Anyway, thanks for any help in advance,
    Andrew