User Guide

74 Handling Component Events
To use the following code, place a check box named myCheckBox_chb and a button named
myButton_btn on the Stage. Select both instances and press F8 to create a new symbol. Click
Advanced if the dialog box is in basic mode, and select Export for ActionScript. Enter Cart in
the AS 2.0 Class text box. In the Property inspector, set the instance name for the new symbol
to anything you want. The symbol is now associated with the Cart class and an instance of the
symbol becomes an instance of this class.
import mx.controls.Button;
import mx.controls.CheckBox;
class Cart {
var myCheckBox_chb:CheckBox;
var myButton_btn:Button;
function onLoad() {
myCheckBox_chb.addEventListener("click", this);
myButton_btn.addEventListener("click", this);
}
function click(eventObj:Object) {
switch(eventObj.target) {
case myButton_btn:
// sends the broadcaster instance name
// and the event type to the Output panel
trace(eventObj.target + ": " + eventObj.type);
break;
case myCheckBox_chb:
trace(eventObj.target + ": " + eventObj.type);
break;
}
}
}