How to extend WPF hit testing zone for a Path object.

Posted by user275587 on Stack Overflow See other posts from Stack Overflow or by user275587
Published on 2010-04-15T01:06:34Z Indexed on 2010/04/15 1:13 UTC
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wpf

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path

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hit

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testing

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canvas

Wpf hit testing is pretty good but the only method I found to extend the hit zone is to put a transparent padding area around your object. I can't find any method to add a transparent area arround a Path object. The path is very thin and I would like to enable hit testing if the user clicks near the path. I can't find any method to extend the path object with a transparent area like the image below : alt text

I tried to used a partially transparent stroke brush but I ran into the problem described here : http://stackoverflow.com/questions/1412833/how-can-i-draw-a-soft-line-in-wpf-presumably-using-a-lineargradientbrush

I also tried to put an adorner over my line but because of WPF anti-aliasing algorithms, the position is way off when I zoom in my canvas and interfere with other objects hit-testing in a bad way.

Any suggestion to extend the hit testing zone would be highly appreciated.

Thanks, Kumar

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