User Guide

Loader.progress 829
Usage
Usage 1:
var listenerObject:Object = new Object();
listenerObject.progress = function(eventObj:Object) {
// ...
};
loaderInstance.addEventListener("progress", listenerObject);
Usage 2:
on (progress) {
// ...
}
Description
Event; broadcast to all registered listeners while content is loading. This event occurs when
the load is triggered by the
autoload parameter or by a call to Loader.load(). The progress
event is not always broadcast, and the
complete event may be broadcast without any
progress events being dispatched. This can happen if the loaded content is a local file.
The first usage example uses a dispatcher/listener event model. A component instance
(
loaderInstance) dispatches an event (in this case, progress) 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” on page 499.
The second usage example uses an
on() handler and must be attached directly to a Loader
instance. The keyword
this, used inside an on() handler attached to a component, refers to
the component instance. For example, the following code, attached to the Loader instance
myLoaderComponent, sends “_level0.myLoaderComponent” to the Output panel:
on (progress) {
trace(this);
}