ManipulationDeltaEventArgs 類別

定義

public ref class ManipulationDeltaEventArgs sealed : System::Windows::Input::InputEventArgs

public sealed class ManipulationDeltaEventArgs : System.Windows.Input.InputEventArgs

type ManipulationDeltaEventArgs = class
    inherit InputEventArgs

Public NotInheritable Class ManipulationDeltaEventArgs
Inherits InputEventArgs

繼承

Object

EventArgs

RoutedEventArgs

InputEventArgs

ManipulationDeltaEventArgs

範例

下列範例顯示 事件的事件處理程式 ManipulationDelta 。 這個範例會 DeltaManipulation 使用 屬性來移動、重設大小及旋轉 Rectangle。 此範例也會檢查事件是否 ManipulationDelta 在慣性期間發生，以及矩形是否觸碰窗口邊緣。 如果這些情況成立，應用程式會停止操作，以防止矩形離開應用程式的可見區域。 本範例是逐步解說 ：建立您的第一個觸控應用程式中較大範例的一部分。

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

備註

類別 ManipulationDeltaEventArgs 包含操作位置變更的相關數據。 屬性 DeltaManipulation 包含上次 ManipulationDelta 發生事件之後發生的變更。 屬性 CumulativeManipulation 包含目前操作所發生的變更總數。 您可以使用其中一個屬性來轉換操作的物件。

您可以呼叫 Complete 方法來結束操作，或藉由呼叫 StartInertia 方法強制操作進入慣性。

屬性

方法

適用於