User Guide
List component 477
The second usage example uses a dispatcher/listener event model. A component instance
(
listInstance) dispatches an event (in this case, scroll) 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 the instance name of the component that generated the change
event to the Output panel:
form.scroll = function(eventObj){
trace("list scrolled");
}
myList.addEventListener("scroll", form);
List.selectable
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
listInstance.selectable
Description
Property; a Boolean value that indicates whether the list is selectable (true) or not (false). The
default value is
true.
List.selectedIndex
Availability
Flash Player 6 (6.0 79.0).
Edition
Flash MX 2004.
Usage
listInstance.selectedIndex