ManipulationDeltaEventArgs.DeltaManipulation Eigenschaft

Definition

Ruft die letzten Änderungen der aktuellen Bearbeitung ab.Gets the most recent changes of the current manipulation.

public:
 property System::Windows::Input::ManipulationDelta ^ DeltaManipulation { System::Windows::Input::ManipulationDelta ^ get(); };
public System.Windows.Input.ManipulationDelta DeltaManipulation { get; }
member this.DeltaManipulation : System.Windows.Input.ManipulationDelta
Public ReadOnly Property DeltaManipulation As ManipulationDelta

Eigenschaftswert

Die letzten Änderungen der aktuellen Bearbeitung.The most recent changes of the current manipulation.

Beispiele

Das folgende Beispiel zeigt einen Ereignishandler für das ManipulationDelta -Ereignis.The following example shows an event handler for the ManipulationDelta event. Im Beispiel wird die DeltaManipulation -Eigenschaft verwendet, um eine Rectanglezu verschieben, zu ändern und zu ändern.The example uses the DeltaManipulation property to move, resize, and rotate a Rectangle. Dieses Beispiel ist Teil eines größeren Beispiels in exemplarischen Vorgehensweise: Erstellen Ihrer ersten Touchscreen-Anwendung.This example is part of a larger example in Walkthrough: Creating Your First Touch Application.

void Window_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
    
    // Get the Rectangle and its RenderTransform matrix.
    Rectangle rectToMove = e.OriginalSource as Rectangle;
    Matrix rectsMatrix = ((MatrixTransform)rectToMove.RenderTransform).Matrix;

    // Rotate the Rectangle.
    rectsMatrix.RotateAt(e.DeltaManipulation.Rotation, 
                         e.ManipulationOrigin.X, 
                         e.ManipulationOrigin.Y);

    // Resize the Rectangle.  Keep it square 
    // so use only the X value of Scale.
    rectsMatrix.ScaleAt(e.DeltaManipulation.Scale.X, 
                        e.DeltaManipulation.Scale.X, 
                        e.ManipulationOrigin.X,
                        e.ManipulationOrigin.Y);

    // Move the Rectangle.
    rectsMatrix.Translate(e.DeltaManipulation.Translation.X,
                          e.DeltaManipulation.Translation.Y);

    // Apply the changes to the Rectangle.
    rectToMove.RenderTransform = new MatrixTransform(rectsMatrix);

    Rect containingRect =
        new Rect(((FrameworkElement)e.ManipulationContainer).RenderSize);

    Rect shapeBounds =
        rectToMove.RenderTransform.TransformBounds(
            new Rect(rectToMove.RenderSize));

    // Check if the rectangle is completely in the window.
    // If it is not and intertia is occuring, stop the manipulation.
    if (e.IsInertial && !containingRect.Contains(shapeBounds))
    {
        e.Complete();
    }

    
    e.Handled = true;
}
Private Sub Window_ManipulationDelta(ByVal sender As Object, ByVal e As ManipulationDeltaEventArgs)

    ' Get the Rectangle and its RenderTransform matrix.
    Dim rectToMove As Rectangle = e.OriginalSource
    Dim rectTransform As MatrixTransform = rectToMove.RenderTransform
    Dim rectsMatrix As Matrix = rectTransform.Matrix


    ' Rotate the shape
    rectsMatrix.RotateAt(e.DeltaManipulation.Rotation,
                         e.ManipulationOrigin.X,
                         e.ManipulationOrigin.Y)

    ' Resize the Rectangle. Keep it square 
    ' so use only the X value of Scale.
    rectsMatrix.ScaleAt(e.DeltaManipulation.Scale.X,
                        e.DeltaManipulation.Scale.X,
                        e.ManipulationOrigin.X,
                        e.ManipulationOrigin.Y)

    'move the center
    rectsMatrix.Translate(e.DeltaManipulation.Translation.X,
                          e.DeltaManipulation.Translation.Y)

    ' Apply the changes to the Rectangle.
    rectTransform = New MatrixTransform(rectsMatrix)
    rectToMove.RenderTransform = rectTransform

    Dim container As FrameworkElement = e.ManipulationContainer
    Dim containingRect As New Rect(container.RenderSize)

    Dim shapeBounds As Rect = rectTransform.TransformBounds(
                                New Rect(rectToMove.RenderSize))

    ' Check if the rectangle is completely in the window.
    ' If it is not and intertia is occuring, stop the manipulation.
    If e.IsInertial AndAlso Not containingRect.Contains(shapeBounds) Then
        e.Complete()
    End If

    e.Handled = True
End Sub

Hinweise

Die DeltaManipulation -Eigenschaft enthält die Änderungen, die seit dem ManipulationDelta letzten Ereignis aufgetreten sind.The DeltaManipulation property contains the changes that occurred since the last ManipulationDelta event occurred. Sie können diese Eigenschaft verwenden, um das manipulierte Objekt zu transformieren.You can use this property to transform the manipulated object.

Gilt für: