MACROMEDIA FLASH MX 2004-USING COMPONENTS Use Manual page 197

Description
Event; broadcast to all registered listeners when the mouse pointer rolls over drop-down list items.
This is a List event that is broadcast from a combo box. For more information, see
List.itemRollOver
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(itemRollOver){
trace(this);
}
The second usage example uses a dispatcher/listener event model. A component instance
(
comboBoxInstance
by a function, also called a handler, on a listener object (
define 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.
Example
The following example sends a message to the Output panel that indicates the index of the item
that the pointer rolled over:
form.itemRollOver = function (eventObj) {
trace("Item #" + eventObj.index + " has been rolled over.");
}
myCombo.addEventListener("itemRollOver", form);
See also
ComboBox.itemRollOut
ComboBox.labelField
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
myComboBox.labelField
.
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()
,
EventDispatcher.addEventListener()
handler attached to a component, refers to the
itemRollOver
listenerObject
415.
method on the component instance that broadcasts
) and the event is handled
) that you create. You
ComboBox component 197