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Normal Topic SVG Rendering Issue (Read 2731 times)
mortenf
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SVG Rendering Issue
Jan 7th, 2011 at 9:30am
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Hi,

I am trying to make the selection hit-test work against the actual outline of the SVG graphics of my nodes, rather than the default rectangle.

From my understanding, setting the Shape property of my SVG node to Shape.FromSvg(node.Content) should make this happen.

And it appears to work! So far, so good!

BUT: After setting the Shape property as described above, the rendering of my SVG graphics gets very ugly!



In the image, Node-2 is rendered with the default shape (Rectangle) while Node-1 is rendered with node.Shape = Shape.FromSvg(node.Content).

Q-1: Is this the correct approach for making selection hit-testing respect the SVG outline?
Q-2: Any suggestions for how to make the graphics look correct even with outline hit-testing?
  
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Stoyo
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Re: SVG Rendering Issue
Reply #1 - Jan 7th, 2011 at 12:44pm
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Hi,

That's very cunning idea 8) Problem is Shape.FromSvg creates a convex-hull approximation based only the SVG element coordinates, but not on their stroke width, and then SvgNode sets its shape as graphics clip region when rendering. Perhaps it is easiest to fix this on our side by not setting clip region if the SvgNode.Transparent property is enabled. It is set to true in your case, right?

Stoyan
  
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mortenf
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Re: SVG Rendering Issue
Reply #2 - Jan 7th, 2011 at 1:13pm
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Yes, node.Transparent is set to 'true'.

Maybe it is possible to set a simpler clipping region (like the original rectangle) while still using the outline for hit-testing?
  
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Stoyo
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Re: SVG Rendering Issue
Reply #3 - Jan 10th, 2011 at 1:21pm
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Hi,

Check the build from the PM page; it should not clip the SVG drawing now. Incidentally our developers have recently added support for some missing SVG elements (e.g. text and marker) for the next release, but we haven't tested it much yet. Please let us know if you see any problems.

I hope that helps,
Stoyan
  
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mortenf
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Re: SVG Rendering Issue
Reply #4 - Jan 20th, 2011 at 10:11am
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Thanks. Looks like its working. Any ETA when this will be in an official release?
  
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Re: SVG Rendering Issue
Reply #5 - Jan 20th, 2011 at 11:09am
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We should release it by mid-February.
  
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