passing parameters to addEventListener AS3 - actionscript-3

Question

I am struggling passing paramters to function on onComplete event handler.
It seems that my problem is with the event.Complete code..
I just want to load image from a url and transfer parameter.
This is my code:
var imageURLRequest:URLRequest = new URLRequest(pic);
var myImageLoader:Loader = new Loader();
myImageLoader.load(imageURLRequest);
myImageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,function(evt:Event.COMPLETE){
doIt(evt, "Shift key was down:")
},false,0, true);
function doIt(evt:Event, msg:String) {
var myBitmapData:BitmapData = new BitmapData(myImageLoader.width, myImageLoader.height);
myBitmapData.draw(myImageLoader);
var myBitmap:Bitmap = new Bitmap;
myBitmap.bitmapData = myBitmapData;
}
Thank you very much.

Answer 1

Remove .COMPLETE from the handler inner function so that your listener looks like this:
myImageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, function(evt:Event)
{
doIt(evt, "Shift key was down:")
} , false, 0, true);

Answer 2

Look at the Loader class as loader, not as DisplayObject even when it is:
var myBitmap:Bitmap;
var contentLoader:Loader = new Loader();
contentLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, handleComplete);
contentLoader.load(imageURLRequest);
function handleComplete(e:Event):void
{
myBitmap = contentLoader.content as Bitmap;
}

Answer 3

Firstly, as Gio said, remove that .COMPLETE from evt:Event.COMPLETE because it's returning a String instead of the Event the function needs.
Then, instead of setting that last fearsomely unpredictable parameter (useWeakReference) to true in your addEventListener(), I recommend you keep the reference in a variable to use removeEventListener() on it at the right time. A way to do this (while answering your question) is:
var imageURLRequest:URLRequest = new URLRequest(pic);
var myImageLoader:Loader = new Loader();
myImageLoader.load(imageURLRequest);
var functionDoIt:Function = doIt("Shift key was down:");
myImageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, functionDoIt);
function doIt(msg:String):Function {
return function(evt:Event):void {
// Now you can use both "msg" and "evt" here
var myBitmapData:BitmapData = new BitmapData(myImageLoader.width, myImageLoader.height);
myBitmapData.draw(myImageLoader);
var myBitmap:Bitmap = new Bitmap(myBitmapData);
}
}
// Remove the listener when you don't need it anymore:
//myImageLoader.contentLoaderInfo.removeEventListener(Event.COMPLETE, functionDoIt);
You can understand this solution better by reading this answer.