IncrementalStrokeHitTester.StrokeHit 事件

定义

命名空间:

System.Windows.Ink

程序集:

PresentationCore.dll

IncrementalStrokeHitTester 与墨迹 Stroke 相交时发生。

public:
 event System::Windows::Ink::StrokeHitEventHandler ^ StrokeHit;

public event System.Windows.Ink.StrokeHitEventHandler StrokeHit;

member this.StrokeHit : System.Windows.Ink.StrokeHitEventHandler 

Public Custom Event StrokeHit As StrokeHitEventHandler 

Public Event StrokeHit As StrokeHitEventHandler 

事件类型

StrokeHitEventHandler

示例

下面的示例演示如何动态擦除部分 Stroke。 若要创建使用户能够擦除墨迹的控件，请参阅 操作方法：在自定义控件上擦除墨迹。

// 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);
    }
}

' 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