WPF Get Element(s) under mouse

Question

Is there a way with WPF to get an array of elements under the mouse on a MouseMove event?

Answer 1

Can you use the VisualTreeHelper.HitTest ?

http://lukieb.blogspot.com/2008/07/visualtreehelperhittest.html

Answer 2

You can also try using the Mouse.DirectlyOver property to get the top-most element that is under the mouse.

Answer 3

From "WPF Unleashed", page 383:

Visual hit testing can inform you about all Visuals that intersect a location, [...] you must use [...] the [VisualTreeHelper.]HitTest method that accepts a HitTestResultCallback delegate. Before this version of HitTest returns, the delegate is invoked once for each relevant Visual, starting from the topmost and ending at the bottommost.

The signature of such a callback is

HitTestResultBehaviour Callback(HitTestResult result)

and it has to return HitTestResultBehaviour.Continue to receive further hits.

For further information, please consult the MSDN documentation for VisualTree.HitTest.

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P.S.: Yes, I can recommend the book ;-)