On the click handler for my image i've got something like
var dragInitiator:Canvas = event.currentTarget as Canvas;
var dragInit:AssetPreviewPanelView = dragInitiator.parent as
AssetPreviewPanelView;
var dragSource:DragSource = new DragSource();
dragSource.addData( dragInit.dataProvider,
"dataProvider" );
var proxyBitmapData:BitmapData =
BitmapDataHelper.getUIComponentBitmapData( dragInit );
var dragProxy:Image = new Image();
var lc:LoaderContext = new LoaderContext();
lc.checkPolicyFile = true;
dragProxy.loaderContext = lc;
dragProxy.source = new Bitmap( proxyBitmapData );
DragManager.doDrag(dragInit, dragSource, event, dragProxy, 0, 0,
0.5, true);
public static function getUIComponentBitmapData
( target:DisplayObject ):BitmapData
{
var bd : BitmapData = new BitmapData( target.width,
target.height );
var m : Matrix = new Matrix();
bd.draw( target, m );
return bd;
}
Does this help?
Bjorn
On 20/04/2007, at 8:16 AM, Shaun wrote:
I am working on a project where I need to create an image based on a
user selected portion of a source image.
The selected area of the source image needs to be
scaled/stretched/shrunk to fit the specific dimensions of the new
image.
I'm basically looking for advice on how to accomplish this.
Currently I have an image control in a canvas. The user clicks and
drags to select the portion of the image they want to use. This works
fine - I have the coordinates and size of the rectangle I need to copy
from the source canvas.
What I can't figure out is the best way to use those coordinates to
get
the underlying image from the canvas and put it into another control.
I've tried creating a sprite containing a bitmap and using the
BitmapData.draw function passing in the source canvas and what I
believe is a correct matrix, but have not succeeded.
Any pointers, examples to look at, etc. would be greatly appreciated.
Thanks,
Shaun
Regards,
Bjorn Schultheiss
Senior Developer
Personalised Communication Power
Level 2, 31 Coventry St.
South Melbourne 3205,
VIC Australia
T: +61 3 9674 7400
F: +61 3 9645 9160
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