IntersectionDetail Enumeration
Provides information about the intersection between the geometries in the GeometryHitTestParameters and the visual which was hit.
Assembly: PresentationCore (in PresentationCore.dll)
| Member name | Description | |
|---|---|---|
| Empty | The Geometry hit test parameter and the target visual, or geometry, do not intersect. | |
| FullyContains | The Geometry hit test parameter is fully contained within the boundary of the target visual or geometry. | |
| FullyInside | The target visual, or geometry, is fully inside the Geometry hit test parameter. | |
| Intersects | The Geometry hit test parameter and the target visual, or geometry, intersect. This means that the two elements overlap, but neither element contains the other. | |
| NotCalculated | The IntersectionDetail value is not calculated. |
The following illustration shows the relationship between the hit test geometry (the blue circle) and the visual geometry (the red square).

Intersection between hit test geometry and visual geometry during hit testing
The following example shows how to use the IntersectionDetail property of GeometryHitTestResult.
' Return the result of the hit test to the callback. Public Function MyHitTestResultCallback(ByVal result As HitTestResult) As HitTestResultBehavior ' Retrieve the results of the hit test. Dim intersectionDetail As IntersectionDetail = (CType(result, GeometryHitTestResult)).IntersectionDetail Select Case intersectionDetail Case IntersectionDetail.FullyContains ' Add the hit test result to the list that will be processed after the enumeration. hitResultsList.Add(result.VisualHit) Return HitTestResultBehavior.Continue Case IntersectionDetail.Intersects ' Set the behavior to return visuals at all z-order levels. Return HitTestResultBehavior.Continue Case IntersectionDetail.FullyInside ' Set the behavior to return visuals at all z-order levels. Return HitTestResultBehavior.Continue Case Else Return HitTestResultBehavior.Stop End Select End Function
Available since 3.0