IncrementalStrokeHitTester Class
Dynamically hit tests a stroke with an eraser path.
Assembly: PresentationCore (in PresentationCore.dll)
| Name | Description | |
|---|---|---|
![]() | IsValid | Gets whether the IncrementalHitTester is hit testing.(Inherited from IncrementalHitTester.) |
| Name | Description | |
|---|---|---|
![]() | AddPoint(Point) | Adds a Point to the IncrementalHitTester.(Inherited from IncrementalHitTester.) |
![]() | AddPoints(IEnumerable<Point>) | Adds points to the IncrementalHitTester.(Inherited from IncrementalHitTester.) |
![]() | AddPoints(StylusPointCollection) | Adds the specified StylusPoint objects to the IncrementalHitTester.(Inherited from IncrementalHitTester.) |
![]() | AddPointsCore(IEnumerable<Point>) | Adds points to the IncrementalHitTester.(Overrides IncrementalHitTester.AddPointsCore(IEnumerable<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 the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | OnStrokeHit(StrokeHitEventArgs) | This API supports the product infrastructure and is not intended to be used directly from your code. 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 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. void eraseTester_StrokeHit(object sender, StrokeHitEventArgs args) { StrokeCollection eraseResult = args.GetPointEraseResults(); StrokeCollection strokesToReplace = new StrokeCollection(); strokesToReplace.Add(args.HitStroke); // Replace the old stroke with the new one. if (eraseResult.Count > 0) { presenter.Strokes.Replace(strokesToReplace, eraseResult); } else { presenter.Strokes.Remove(strokesToReplace); } }
Available since 3.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.



