HitTestFilterBehavior Enumeration
Specifies the return behavior of a hit test in a hit test filter callback method.
Assembly: PresentationCore (in PresentationCore.dll)
| Member name | Description | |
|---|---|---|
| ContinueSkipChildren | Hit test against the current Visual, but not its descendants. | |
| ContinueSkipSelfAndChildren | Do not hit test against the current Visual or its descendants. | |
| ContinueSkipSelf | Do not hit test against the current Visual, but hit test against its descendants. | |
| Continue | Hit test against the current Visual and its descendants. | |
| Stop | Stop hit testing at the current Visual. |
The return value of the hit test filter callback is a HitTestFilterBehavior, which determines what type of action should be taken when processing the visual tree for hit testing. For example, if your hit test filter callback return the value, ContinueSkipSelfAndChildren, you can remove the current visual object and its descendants from the hit test results evaluation.
Note: |
|---|
Pruning the visual tree of objects decreases the amount of processing that is required during the hit test results evaluation pass. |

The following example shows how to return a HitTestFilterBehavior value from a hit test filter callback method. In this case, the filter skips labels and their descendants and hit tests everything else.
// Filter the hit test values for each object in the enumeration. public HitTestFilterBehavior MyHitTestFilter(DependencyObject o) { // Test for the object value you want to filter. if (o.GetType() == typeof(Label)) { // Visual object and descendants are NOT part of hit test results enumeration. return HitTestFilterBehavior.ContinueSkipSelfAndChildren; } else { // Visual object is part of hit test results enumeration. return HitTestFilterBehavior.Continue; } }
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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