IncrementalStrokeHitTester Class
Dynamically hit tests a stroke with an eraser path.
Assembly: PresentationCore (in PresentationCore.dll)
The IncrementalStrokeHitTester type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | IsValid | Gets whether the IncrementalHitTester is hit testing. (Inherited from IncrementalHitTester.) |
| Name | Description | |
|---|---|---|
![]() | AddPoint | Adds a Point to the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
![]() | AddPoints(IEnumerable(Of Point)) | Adds points to the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
![]() | AddPoints(StylusPointCollection) | Adds the specified StylusPoint objects to the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
![]() | AddPointsCore | Adds points to the IncrementalHitTester. (Overrides IncrementalHitTester.AddPointsCore(IEnumerable(Of Point)).) |
![]() | EndHitTesting | Releases resources used by the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | OnStrokeHit | Infrastructure. Raises the StrokeHit event. |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
The IncrementalStrokeHitTester hit tests strokes by determining when a eraser path intersects that stroke. Use the AddPoints(Point()) method in the stylus events to add the points to the IncrementalStrokeHitTester. When the points added to the IncrementalStrokeHitTester intersect a Stroke, the IncrementalStrokeHitTester raises the StrokeHit event.
The following example demonstrates how to dynamically erase a portion of a Stroke. To create a control that enables a user to erase ink, see How to: Erase Ink on a Custom Control.
' When the stylus intersects a stroke, erase that part of ' the stroke. When the stylus dissects a stoke, the ' Stroke.Erase method returns a StrokeCollection that contains ' the two new strokes. Private Sub eraseTester_StrokeHit(ByVal sender As Object, _ ByVal args As StrokeHitEventArgs) Dim eraseResult As StrokeCollection = _ args.GetPointEraseResults() Dim strokesToReplace As New StrokeCollection() strokesToReplace.Add(args.HitStroke) ' Replace the old stroke with the new one. If eraseResult.Count > 0 Then presenter.Strokes.Replace(strokesToReplace, eraseResult) Else presenter.Strokes.Remove(strokesToReplace) End If End Sub 'eraseTester_StrokeHit
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.



