MACROMEDIA FLASH MX 2004-USING COMPONENTS Use Manual page 800

Example
The following code makes an icon blink when a key is pressed:
formListener.handleEvent = function(eventObj)
{
form.icon.visible = !form.icon.visible;
}
form.addEventListener("keyDown", formListener);
UIComponent.keyUp
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
on(keyUp){
...
}
listenerObject = new Object();
listenerObject.keyUp = function(eventObject){
...
}
componentInstance.addEventListener("keyUp", listenerObject)
Description
Event; notifies listeners when a key is released. This is a low-level event that you should not use
unless necessary, because it can affect system performance.
The first usage example uses an
component instance.
The second usage example uses a dispatcher/listener event model. A component instance
(
componentInstance
function, also called a handler, on a listener object (
a method with the same name as the event on the listener object; the method is called when the
event is triggered. When the event is triggered, it automatically passes an event object
( ) to the listener object method. Each event object has properties that contain
eventObject
information about the event. You can use these properties to write code that handles the event.
Finally, you call the
instance that broadcasts the event to register the listener with the instance. When the instance
dispatches the event, the listener is called.
For more information, see
Example
The following code makes an icon blink when a key is released:
formListener.handleEvent = function(eventObj)
800 Chapter 6: Components Dictionary
handler and must be attached directly to a
on()
) dispatches an event (in this case,
EventDispatcher.addEventListener()
"EventDispatcher class" on page
) and the event is handled by a
keyUp
) that you create. You define
listenerObject
method on the component
415.