User Guide
470 Chapter 6: Components Dictionary
The second usage example uses a dispatcher/listener event model. A component instance
(
listInstance) dispatches an event (in this case, itemRollOver) and the event is handled by a
function, also called a handler, on a listener object (
listenerObject) that you create. You 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
(
eventObject) to the listener object method. Each event object has properties that contain
information about the event. You can use these properties to write code that handles the event.
Finally, you call the
EventDispatcher.addEventListener() method on the component
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 “EventDispatcher class (API)” on page 415.
Example
The following example sends a message to the Output panel that indicates which item index
number has been rolled over:
form.itemRollOver = function (eventObj) {
trace("Item #" + eventObj.index + " has been rolled over.");
}
myList.addEventListener("itemRollOver", form);
See also
List.itemRollOut
List.labelField
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
listInstance.labelField
Description
Property; specifies a field in each item to be used as display text. This property takes the value of
the field and uses it as the label. The default value is
"label".
Example
The following example sets the labelField property to be the "name" field of each item. “Nina”
would display as the label for the item added in the second line of code:
list.labelField = "name";
list.addItem({name: "Nina", age: 25});
See also
List.labelFunction