Get a class from my flash library dynamically

Question

I have several bitmaps in my flash library that I have exported for Actionscript. Now depending on the Flashvars I receive I want to load the corresponding library bitmap.

How do I load a bitmap class dynamically?

Answer 1

Basically, to attach bitmap from the library you would do this:

import flash.display.BitmapData;
import flash.display.Bitmap;

var bmp:BitmapData = new ClassNameOfTheBitmap(0, 0);
var img = new Bitmap(bmp);

addChild(img);

But since you don't know the class name, you'll have to create the class dynamically like this:

import flash.display.BitmapData;
import flash.display.Bitmap;

var classNameFromFlashvars:String = "xxx";
var cls:Class = getDefinitionByName(classNameFromFlashvars) as Class;

var bmp:BitmapData = new cls(0, 0) as BitmapData;
var img = new Bitmap(bmp);

addChild(img);

In this case, the class name in the linkage properties of the image would be xxx.