IncrementalStrokeHitTester Class

Dynamically hit tests a stroke with an eraser path.

Namespace: System.Windows.Ink
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

'Declaration
Public Class IncrementalStrokeHitTester
	Inherits IncrementalHitTester
'Usage
Dim instance As IncrementalStrokeHitTester

public class IncrementalStrokeHitTester extends IncrementalHitTester
public class IncrementalStrokeHitTester extends IncrementalHitTester
You cannot use this managed class in XAML.

The IncrementalStrokeHitTester hit tests strokes by determining when a eraser path intersects it. 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 allows 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.
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 

System.Object
   System.Windows.Ink.IncrementalHitTester
    System.Windows.Ink.IncrementalStrokeHitTester

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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