User Guide

304 Chapter 6: ActionScript Core Classes

Example

The following example calls the getCode() method any time a key is pressed. The example

creates a listener object named

keyListener and defines a function that responds to the

onKeyDown event by calling Key.getCode(). The keyListener object is then registered to the

Key object, which broadcasts the onKeyDown message whenever a key is pressed while the SWF

file plays.

var keyListener:Object = new Object();

keyListener.onKeyDown = function() {

// compare return value of getCode() to constant

if (Key.getCode() == Key.ENTER) {

trace ("Virtual key code: "+Key.getCode()+" (ENTER key)");

}

else {

trace("Virtual key code: "+Key.getCode());

}

};

Key.addListener(keyListener);

The following example adds a call to Key.getAscii() to show how the two methods differ. The

main difference is that

Key.getAscii() differentiates between uppercase and lowercase letters,

and

Key.getCode() does not.

var keyListener:Object = new Object();

keyListener.onKeyDown = function() {

trace("For the last key typed:");

trace("\tThe Key code is: "+Key.getCode());

trace("\tThe ASCII value is: "+Key.getAscii());

trace("");

};

Key.addListener(keyListener);