IncrementalStrokeHitTester.StrokeHit Evento

Definizione

Spazio dei nomi:

System.Windows.Ink

Assembly:

PresentationCore.dll

Si verifica quando l'oggetto IncrementalStrokeHitTester interseca un'oggetto Stroke dell'input penna.

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 

Tipo evento

StrokeHitEventHandler

Esempio

Nell'esempio seguente viene illustrato come cancellare dinamicamente una parte di un Strokeoggetto . Per creare un controllo che consente a un utente di cancellare l'input penna, vedere Procedura: Cancellare input penna in un controllo personalizzato.

// 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