MACROMEDIA FLASH MX 2004-USING COMPONENTS Use Manual page 200

See also
ComboBox.close()
ComboBox.open
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
Usage 1:
on(open){
// your code here
}
Usage 2:
listenerObject = new Object();
listenerObject.open = function(eventObject){
// your code here
}
comboBoxInstance.addEventListener("open", listenerObject)
Description
Event; broadcast to all registered listeners when the drop-down list is completely open.
The first usage example uses an
instance. The keyword
component instance. For example, the following code, attached to the ComboBox instance
, sends "_level0.myBox" to the Output panel:
myBox
on(open){
trace(this);
}
The second usage example uses a dispatcher/listener event model. A component instance
(
comboBoxInstance
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.
For more information, see
Finally, you call the
the event to register the listener with the instance. When the instance dispatches the event, the
listener is called.
200 Chapter 6: Components Dictionary
handler and must be attached directly to a ComboBox
on()
, used in an
this on()
) dispatches an event (in this case,
"EventDispatcher class" on page
addEventListener()
handler attached to a component, refers to the
) and the event is handled by a
open
listenerObject
415.
method on the component instance that broadcasts
) that you create. You define