Thanks Bjorn, I think I'm headed in the right direction now, but I
still have one hurdle.
I'm successfully copying the source image to the preview control, but
I can't figure out how to only copy a portion of the source image
instead of the whole thing. How do I get just a certain rectangle of
the source image to pass into the BitmapData.draw() function?
Any ideas?
Thanks again,
shaun
--- In flexcoders@yahoogroups.com, Bjorn Schultheiss
<[EMAIL PROTECTED]> wrote:
>
> 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
>
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>
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