Mouse event not reaching UIElement

Question

I have a 6x8 grid of System.Windows.Controls.Canvas objects. The top left canvas does not receive mouse events while all the others do. I tried OnMouseMove and OnMouseClick events.

A child object isn't handling the event because System.Windows.Media.VisualTreeHelper#GetChildrenCount() doesn't show any children. I couldn't catch PreviewOnMouseMove either. Can there be some (perhaps transparent) control in front of my canvas that is taking precedence?

could you post the code/xaml in question? it would help us lots in helping you solve your problem! ;) — Ashley Grenon, Oct 18 '10 at 18:56
I know, I know. There are many controls being created here and there. My question would have been very bulky. — tilish, Oct 20 '10 at 10:31

score 1 · Accepted Answer · edited Aug 21 '13 at 03:26

1

Finally found a solution. Each of the Canvases have Adorners. According to this MSDN article, adorners receive mouse events before the underlying UI element does. I set the IsHitTestVisible property of all my adorners to false.

edited Aug 21 '13 at 03:26

Dave Clemmer

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answered Oct 20 '10 at 10:28

tilish

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score 0 · Answer 2 · edited Aug 21 '13 at 03:25

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I hope this helps you, Just set Transparent value to the Background property for the Canvas:

Background="Transparent"

Good luck!

edited Aug 21 '13 at 03:25

Dave Clemmer

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answered Oct 18 '10 at 19:04

Homam

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I tried for the Canvas only - but just for the record do we have any explanation as to why setting a backgrounds to transparent might help? EDIT: (It would be useful to know) – tilish Oct 20 '10 at 10:46

Mouse event not reaching UIElement

2 Answers2