HI,
Thanx for the quick reply. I already use the 1.5b (CVS, updated today).
If I look into the JGVTComponent into renderGVTTree I see something like
this:
Shape s = inv.createTransformedShape
(new Rectangle(0, 0, d.width, d.height));
// Rendering thread setup.
gvtTreeRenderer = new GVTTreeRenderer(
renderer,
renderingTransform,
doubleBufferedRendering,
s, d.width, d.height);
Looks like everything is repainted instead of the changed part (which my
eyes confirm in a test). Or do I have to call some other methode than
setDocument, to perform only a partial repaint (hopefully leaving the
already painted things on screen and only repainting the changed part)?
Kind regards,
Michael.
P.S. Btw, I work on a PII 350 with Linux SuSe 7.2 / KDE 2.2.2, not too
fast I guess ;-)
Thomas E Deweese wrote:
>>>>>>"MV" == M van Veen <[EMAIL PROTECTED]> writes:
>>>>>
>
> MV> Does somebody know if it is possible to repaint only the part
> MV> which has changed (int the DOMtree) on the SVGCanvas?
>
> You don't say what version of Batik you are using but from the
> question I assume 1.1.1. If you switch to CVS this should happen
> 'automagically' for many things. There are still a number of very
> tricky SVG constructs for which this does not work (Patterns for
> example). The 1.5beta1 handles some simple changes but the current
> CVS handles a lot more.
>
> MV> After I have changed something in the DOM tree, I call
> MV> setDocument( getDocument() ) and it repaints, but it renders the
> MV> WHOLE image which is rather slow. When I looked at the code I saw
> MV> that it is possible to specify an area of interest to render. But
> MV> to do this I have to rewrite a lot of methodes ( for example the
> MV> on in JGVTComponent.renderGVTTree() (which will of course change
> MV> in the near future) : not a good plan.
>
> MV> So is there away around this, or is this going to be implemented
> MV> in the near future? (Maybe it's an idea when a change is made in
> MV> de DOMtree to get the GraphicsNode of the element and ask its
> MV> transformedbounds, and only repaint this part in the canvas, after
> MV> building the gvttree (or a part) again?)
>
> We do these sorts of optimizations in the 1.5 branch of things.
>
> MV> Kind regards, and keep up the good work!
>
> Thanks, I hope you find the CVS Batik more useful for your work.
>
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