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From jonathan wood <jonathanshaww...@gmail.com>
Subject Re: When is the UpdateManager definitely available?
Date Fri, 02 Nov 2012 20:53:37 GMT
Hi Marco,

  I use a slightly different overload:

        canvas.addGVTTreeBuilderListener(new GVTTreeBuilderAdapter() {
            @Override
            public void gvtBuildCompleted(GVTTreeBuilderEvent e) {
                // do stuff
            }
        });


On Fri, Nov 2, 2012 at 9:53 AM, Marco Herrn <ml@mherrn.de> wrote:

> Hi,
>
> I must push this mail again.
> It now happened again multiple times to me, that the the method
> canvas.getUpdataManager() returned null when the gvgTreeRenderer completed.
> It happens seldom, but it does happen.
>
> Please see again the code snipped in the quoted text.
>
> Is it a bug in batik? According to the javadoc of the getUpdateManager()
> method I would expect that it is guaranteed that getUpdateManager() won't
> return null when being called after being informed of rendering completion.
>
> Any help appreciated.
> Regards
> Marco
>
>
> On Fri, Jul 20, 2012 at 03:38:45PM +0200, ml@mherrn.de wrote:
> > Hi I am using the following code:
> >
> > canvas.addGVTTreeRendererListener(new GVTTreeRendererAdapter() {
> >         @Override
> >         public void gvtRenderingCompleted(GVTTreeRendererEvent e) {
> >
> canvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(runnable);
> >         }
> >       });
> >
> > to do some changes in the DOM of an SVG document. I expected that the
> > updatemanager is definitely available when gvtRenderingCompleted was
> > called.
> > However, it now happened at least once that I got a NullPointerException
> > on the line
> >
> canvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(runnable);
> >
> > So it seems that there is still no guarantee that the UpdateManager is
> > available then. Am I missing something? Must I register on a different
> > listener?
>
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