BitmapData.copyPixels(). For future reference, it allows you to copy
a portion of a bitmap specified by a rectangle - exactly what I
need. Thanks for the help, Bjorn.
--- In flexcoders@yahoogroups.com, "Shaun" <[EMAIL PROTECTED]> wrote:
>
> 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
> <bjorn.schultheiss@> 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
> >
> > T: +61 3 9674 7400
> > F: +61 3 9645 9160
> > W: http://www.qdc.net.au
> >
> > ((------------This transmission is confidential and intended
> solely
> > for the person or organization to whom it is addressed. It may
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> > intended recipient, you should not copy, distribute or take any
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> > transmission in error, please notify the sender.---------------))
> >
>
