ManipulationDeltaEventArgs.IsInertial ManipulationDeltaEventArgs.IsInertial ManipulationDeltaEventArgs.IsInertial ManipulationDeltaEventArgs.IsInertial Property

Definición

Obtiene un valor que indica si el evento ManipulationDelta se produce durante inercia.Gets a value that indicates whether the ManipulationDelta event occurs during inertia.

public:
 property bool IsInertial { bool get(); };
public bool IsInertial { get; }
member this.IsInertial : bool
Public ReadOnly Property IsInertial As Boolean

Valor de propiedad

Es true si el evento ManipulationDelta se produce durante la inercia; es false si el evento se produce mientras el usuario tiene contacto con UIElement.true if the ManipulationDelta event occurs during inertia; false if the event occurs while the user has contact with the UIElement.

Ejemplos

El ejemplo siguiente muestra un controlador de eventos para el ManipulationDelta eventos.The following example shows an event handler for the ManipulationDelta event. El ejemplo se comprueba si el ManipulationDelta se ha producido un evento durante la inercia y si el rectángulo toca el borde de una ventana.The example checks whether the ManipulationDelta event occurred during inertia and whether the rectangle is touching the edge of a window. Si se cumplen esos casos, la aplicación detiene la manipulación para evitar que el rectángulo salir del área visible de la aplicación.If those cases are true, the application stops the manipulation to prevent the rectangle from leaving the visible area of the application. Este ejemplo forma parte de un ejemplo más extenso en Tutorial: Crear su primera aplicación táctil.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

Comentarios

Puede usar este método para determinar si el ManipulationDelta evento se produce durante la inercia o mientras el usuario tiene contacto con el elemento que recibe la ManipulationDelta eventos.You can use this method to determine whether the ManipulationDelta event occurs during inertia or while the user has contact with the element that receives the ManipulationDelta event.

Se aplica a