Hi Thomas,
Thanks for the reply.
> What you say 'canvas' do you mean the Batik JSVGCanvas? Or your
> personsal SWT Canvas?
I only have one canvas, a class derived from the SWT Canvas class. In it's
paint listener I render the graphics node a BufferedImage, and use the
results to draw it on that SWT canvas.
> It is essential that you not modify the document while a paint is in
> progress. If the renderer detects this condition it will generaly abort
> since it's impossible to get a reasonable result.
Is there a standard way to avoid rendering while updating? I tried using
the update manager, but this did not solve the problems. Since the
simulator is in a different thread than the SWT display, the drawing and
updating happen in different threads. Does Batik offer something to solve
this, or should I apply standard Java thread data sharing techniques?
> The only other thing I can think of would be if the clip (or other
> attributes) of the Graphics2D was weird.
I don't manually change any clipping or related things. I assume there is
no way these things change on their own. Also, it works most of the time,
but not all the time, so I guess paint while updating would be the more
likely candidate.
Best regards,
Dennis
thomas.dewe...@kodak.com wrote:
Hi Dennis,
Dennis Hendriks <d.hendr...@tue.nl> wrote on 05/10/2011 10:35:13 AM:
> For a simulator I'm writing I'm using Batik to visualize the model being
> simulated. The simulator loads an SVG file and after each simulation
steps,
> it calls some hooks that update the SVG document, and after that it
redraws
> the canvas. The canvas paint event renders the graphics node to a
> BufferedImage, after which the data is passed to SWT to render it on the
> SWT canvas.
What you say 'canvas' do you mean the Batik JSVGCanvas? Or your
personsal SWT Canvas?
> Does anyone know what I might be doing wrong, that causes nothing to be
> drawn? Under what circumstances could graphicsNode.paint(g) have the
effect
> that nothing is drawn?
It is essential that you not modify the document while a paint
is in
progress. If the renderer detects this condition it will generaly abort
since it's impossible to get a reasonable result.
The only other thing I can think of would be if the clip (or other
attributes) of the Graphics2D was weird.
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