IncrementalLassoHitTester Class
Dynamically hit tests a Stroke with a lasso.
Namespace: System.Windows.Ink
Assembly: PresentationCore (in PresentationCore.dll)
The IncrementalLassoHitTester 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<Point>) | Adds points to the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
| AddPoints(StylusPointCollection) | Adds the specified StylusPoint objects to the IncrementalHitTester. (Inherited from IncrementalHitTester.) |
| AddPointsCore | Infrastructure. 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 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.) |
| OnSelectionChanged | Infrastructure. Raises the SelectionChanged event. |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
The IncrementalLassoHitTester hit tests strokes by determining whether a lasso path surrounds it. Use the AddPoints method in the stylus events to add the points to the IncrementalLassoHitTester. When the points added to the IncrementalLassoHitTester selects or unselects a Stroke, the IncrementalLassoHitTester raises the SelectionChanged event
The following example demonstrates how to dynamically select strokes in a custom control. For the entire sample, see How to: Select Ink from a Custom Control
void selectionTester_SelectionChanged(object sender, LassoSelectionChangedEventArgs args) { // Change the color of all selected strokes to red. foreach (Stroke selectedStroke in args.SelectedStrokes) { selectedStroke.DrawingAttributes.Color = Colors.Red; selectedStrokes.Add(selectedStroke); } // Change the color of all unselected strokes to // their original color. foreach (Stroke unselectedStroke in args.DeselectedStrokes) { unselectedStroke.DrawingAttributes.Color = inkDA.Color; selectedStrokes.Remove(unselectedStroke); } }
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
