I would like to perform a rectangual hit test on WPF Canvas component in order to get Controls that are overlapped by a Rectangle framework element. I found a Silverlight's VisualTreeHelper.FindElementsInHostCoordinates method, but apparently it's not available in WPF.
What's the best method to achieve such functionality?
Supposing you have a call like this in Silverlight
var result = VisualTreeHelper.FindElementsInHostCoordinates(myPoint, myUIElement);
then this WPF code should have an equivalent result
var result = new List<DependencyObject>();
//changed from external edits, because VisualHit is
//only a DependencyObject and may not be a UIElement
//this could cause exceptions or may not be compiling at all
//simply filter the result for class UIElement and
//cast it to IEnumerable<UIElement> if you need
//the very exact same result including type
VisualTreeHelper.HitTest(
myUiElement,
null,
new HitTestResultCallback(
(HitTestResult hit)=>{
result.Add(hit.VisualHit);
return HitTestResultBehavior.Continue;
}),
new PointHitTestParameters(myPoint));
in your special case you might want to use GeometryHitTestParameters instead of PointHitTestParameters to do a Rect-Test.
The closest equivalent is VisualTreeHelper.HitTest. It works significantly differently to Silverlight's FindElementsInHostCoordinates, but you should be able to use it for your needs.
