Problem with VisualTreeHelper.HitTest in WPF

Question

I\'m trying to hit-test a bunch of UserControls on a Canvas. I don\'t want the HitTest() to walk the whole way through the visual tree, so I\'m using the FilterCallback to

Answer 1

I know it's pretty damn late to answer this but here goes: a different approach is to override HitTestCore on the UserControl and provide it with the default behavior that would be expected from it:

protected override System.Windows.Media.HitTestResult HitTestCore(System.Windows.Media.PointHitTestParameters hitTestParameters)
{
    return new PointHitTestResult(this, hitTestParameters.HitPoint);
}

(of course you could complicate things and hit-test the actual children or the combination of their bounding boxes, but for me the bounding box of the user control was good enough; also, if you want to hit-test against geometry you need to override that second overload as well.)

This makes it work as expected, filtering out the children when using HitTestFilterBehavior.ContinueSkipChildren in the filter.