How to send image data to a custom class? - actionscript-3

Question

I'm trying to create a custom class that will create a tile (a small rounded square) when requested, with a small image on it. I can successfully create the tile, as shown in the code below, but I don't know how to pass the class the pictures data.
Is it possible to do this using bitmapData, or by referancing it throught the library (if i store my picture in a movieclip in the library?
Here is my class so far:
package com{
import flash.display.MovieClip;
import fl.transitions.Tween;
import fl.transitions.easing.Strong;
public class tileCreator extends MovieClip{
public var tiled:MovieClip;
public var sourceImage:MovieClip = new MovieClip;
public function tileCreator() {
trace("tile creator");
tiled = new MovieClip;
tiled.graphics.beginFill(0x666666, 0.3);
tiled.graphics.drawRoundRect(-55/2, -55/2, 55, 55, 15, 15);
this.addChild(tiled);
}
}
}

Answer 1

yes, it's possible using BitmapData.
import an image to the library and right-click it to change "settings ...".
you have to check "export for actionscript" and put a name into the second textfield underneath the checkbox - let's say 'MyImage'. (flash automatically adds the base-class of type flash.display.BitmapData).
then you can create an instance of the image saying:
var myImage:MyImage = new MyImage();
it's a BitmapData object, because your MyImage class extends BitmapData.
then you just have to add the BitmapData to the constructor as an argument (rename your class to Tile, because it's not a creator but the tile itself you create. and use a capital letter!).
public class Tile extends MovieClip
{
public function Tile (img:BitmapData)
{
var bmp:Bitmap = new Bitmap(img);
addChild(bmp);
tiled = new MovieClip;
tiled.graphics.beginFill(0x666666, 0.3);
tiled.graphics.drawRoundRect(-55/2, -55/2, 55, 55, 15, 15);
addChild(tiled);
bmp.mask = tiled;
}
}

Answer 2

you need to do it in the folowin way:
function createBitmap ( yourMovieClipYouWantToBeAsImage : DisplayObject ) : Bitmap
{
var bitmapData:BitmapData = new BitmapData ( width, height );
bitmapData.draw ( yourMovieClipYouWantToBeAsImage );
var bitmap:Bitmap = new Bitmap ( bitmapData );
return bitmap; // do what ever you want with it but now as an image
}

Answer 3

You can create a "snapshot" of this using bitmapData. You can then pass this to any other class you want. Code is shown below.
//This code goes into your TileCreator-class
public function draw():BitmapData
{
//True and 0 at the end of creating this bitmap ensure transparancy
//for the transparant pixels (else these would be opaque)
var bmp:BitmapData = new BitmapData(width, height, true, 0);
bmp.draw(this);
return bmp;
}