MACROMEDIA FLASH 8-COMPONENTS LANGUAGE Reference page 1118

The first usage example uses a dispatcher/listener event model. A component instance
(
scrollPaneInstance
by a function, also called a handler, on a listener object (
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
that contain information about the event. You can use these properties to write code that
handles the event. Finally, you call the
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
The second usage example uses an
instance. The keyword
the component instance. For example, the following code, attached to the ScrollPane
component instance
on (progress) {
trace(this);
}
Example
This example creates a ScrollPane instance called
with a
spListener progress
functions to display the progress of the load in the Output panel.
getBytesTotal()
You first drag the ScrollPane component from the Components panel to the current
document's library and then add the following code to Frame 1:
/**
Requires:
- ScrollPane component in library
*/
this.createClassObject(mx.containers.ScrollPane, "my_sp", 10);
my_sp.setSize(360, 280);
var spListener:Object = new Object();
spListener.progress = function(evt_obj:Object):Void {
trace("Loading " + my_sp.contentPath);
trace(my_sp.getBytesLoaded() + " of " + my_sp.getBytesTotal() + " bytes
loaded");
};
my_sp.addEventListener("progress", spListener);
System.security.allowDomain("http://www.helpexamples.com");
my_sp.contentPath = "http://www.helpexamples.com/flash/images/image1.jpg";
1114 ScrollPane component
) dispatches an event (in this case,
) to the listener object method. Each event object has properties
EventDispatcher.addEventListener()
"EventDispatcher class" on page
handler and must be attached directly to a ScrollPane
on()
, used inside an
this
, sends "_level0.mySPComponent" to the Output panel:
mySPComponent
event handler. The event handler calls the
progress
listenerObject
499.
handler attached to a component, refers to
on()
and defines a listener object called
my_sp
) and the event is handled
) that you create.
method on
getBytesLoaded()