Hi Nazar,
"Nazar Stasiv (Lohika, Inc)" <[EMAIL PROTECTED]> wrote on 08/22/2006
06:49:43 AM:
> [EMAIL PROTECTED] wrote:
> >
> >
> > I would suggest looking at the code in
> > batik.transcoder.SVGAbstractTranscoder, in particular around the
> > call 'setViewingTransform'. This is in some sense the 'correct'
> > way to handle this.
> >
> I see transcode method which does setViewingTransform. And I've got two
> questions
> 1. transcode method is applied to every GraphicsNode in GVTTree or
> applying it to root node is enough?
Applying it to the root is enough.
> 2. setViewingTransform is the method of type CanvasGraphicsNode and I
> get a ClassCastException when casting GraphicsNode
Normally the CanvasGraphicNode is the first child of the
RootGraphicsNode.
See code from SVGAbstractTranscoder (two lines above setViewingTransform):
CanvasGraphicsNode cgn = getCanvasGraphicsNode(gvtRoot);
And the method that calls (9 lines after setViewingTransform):
protected CanvasGraphicsNode getCanvasGraphicsNode(GraphicsNode gn) {
if (!(gn instanceof CompositeGraphicsNode))
return null;
CompositeGraphicsNode cgn = (CompositeGraphicsNode)gn;
List children = cgn.getChildren();
if (children.size() == 0)
return null;
gn = (GraphicsNode)children.get(0);
if (!(gn instanceof CanvasGraphicsNode))
return null;
return (CanvasGraphicsNode)gn;
}
> Nothing happens for the code below, the condition is false
> if (gvtRoot instanceof CanvasGraphicsNode){
> ((CanvasGraphicsNode)gvtRoot).setViewingTransform(Px);
> }
>
>
> Nazar
>
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