Increasing the Hit Selection area of a Curve in Chart Component in WPF

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Hi All,

I am fairly new to WPF and working on Chart Custom control,
I wanted to allow user to click easily on any curve in the Chart to append desired information.
But the problem is, Clicking on the curve is very difficult.
Is there any way by which we can increase the selection area of the Curve on the chart?

Thanks in advance...

Posted 6-Feb-12 23:29pm

Pankaj Babre

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-02-07T08:35:00

I understand the problem. First thing which comes to my mind is padding your target curve with the transparent curve or other Shape which identical curve or shape, except transparency and thickness. This pad shape should be made much thicker by using the property Shape.StrokeThickness, http://msdn.microsoft.com/en-us/library/system.windows.shapes.shape.strokethickness.aspx[^].

If you do so, you can handle the hit test on the padded curve and do the same action as the hit was done on your target curve.

This is just a suggestion. I did not face with this problem yet, just thought about it. So, I'm not sure if this is the best or the only technique.

—SA