MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Manual page 772

About using listener syntax
You can write listeners for events in several ways in Flash 8. Some popular techniques are
shown in the following code examples. The first example shows a properly formatted listener
syntax, which uses a Loader component to load content into a SWF file. The
starts when content loads, and the
var boxLdr:mx.controls.Loader;
var ldrListener:Object = new Object();
ldrListener.progress = function(evt:Object) {
trace("loader loading:" + Math.round(evt.target.percentLoaded) + "%");
};
ldrListener.complete = function(evt:Object) {
trace("loader complete:" + evt.target._name);
};
boxLdr.addEventListener("progress", ldrListener);
boxLdr.addEventListener("complete", ldrListener);
boxLdr.load("http://www.helpexamples.com/flash/images/image1.jpg");
A slight variation on the first example in this section is to use the
this technique is slightly more cumbersome. Macromedia does not recommend this technique
because you must use a series of
event is caught.
var boxLdr:mx.controls.Loader;
var ldrListener:Object = new Object();
ldrListener.handleEvent = function(evt:Object) {
switch (evt.type) {
case "progress" :
trace("loader loading:" + Math.round(evt.target.percentLoaded) + "%");
break;
case "complete" :
trace("loader complete:" + evt.target._name);
break;
}
};
boxLdr.addEventListener("progress", ldrListener);
boxLdr.addEventListener("complete", ldrListener);
boxLdr.load("http://www.helpexamples.com/flash/images/image1.jpg");
772 Best Practices and Coding Conventions for ActionScript 2.0
event indicates when loading finishes.
complete
statements or a
if..else
progress
handleEvent
statement to detect which
switch
event
method, but