MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE - Onkeydown (Key.onkeydown Event Listener)

686 ActionScript classes
Example
The following example shows how to use the
length property to ascertain the number of
listener objects currently registered to the Key object.
var myListener:Object = new Object();
myListener.onKeyDown = function () {
trace ("You pressed a key.");
}
Key.addListener(myListener);
trace(Key._listeners.length); // Output: 1
onKeyDown (Key.onKeyDown event listener)
onKeyDown = function() {}
Notified when a key is pressed. To use onKeyDown, you must create a listener object. You can
then define a function for
onKeyDown and use addListener() to register the listener with the
Key object, as shown in the following example:
var keyListener:Object = new Object();
keyListener.onKeyDown = function() {
trace("DOWN -> Code: "+Key.getCode()+"\tACSII: "+Key.getAscii()+"\tKey:
"+chr(Key.getAscii()));
};
keyListener.onKeyUp = function() {
trace("UP -> Code: "+Key.getCode()+"\tACSII: "+Key.getAscii()+"\tKey:
"+chr(Key.getAscii()));
};
Key.addListener(keyListener);
Listeners enable different pieces of code to cooperate because multiple listeners can receive
notification about a single event.
A Flash application can only monitor keyboard events that occur within its focus. A Flash
application cannot detect keyboard events in another application.
Availability: ActionScript 1.0; Flash Player 6
See also
addListener (Key.addListener method)