ManipulationStartingRoutedEventArgs Clase

Definición

Espacio de nombres:

Windows.UI.Xaml.Input

Proporciona datos para el evento ManipulationStarting, .

public ref class ManipulationStartingRoutedEventArgs sealed : RoutedEventArgs

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class ManipulationStartingRoutedEventArgs final : RoutedEventArgs

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class ManipulationStartingRoutedEventArgs : RoutedEventArgs

Public NotInheritable Class ManipulationStartingRoutedEventArgs
Inherits RoutedEventArgs

Herencia

Object Platform::Object IInspectable RoutedEventArgs ManipulationStartingRoutedEventArgs

Atributos

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Requisitos de Windows

Familia de dispositivos	Windows 10 (se introdujo en la versión 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (se introdujo en la versión v1.0)

Ejemplos

En el ejemplo de código siguiente se muestra el escenario 4 del ejemplo de entrada. Este código muestra algunos patrones de uso para la manipulación directa mediante los eventos ManipulationStarting, ManipulationStarted, ManipulationDelta, ManipulationInertiaStarting y ManipulationCompleted .

private TransformGroup _transformGroup;
private MatrixTransform _previousTransform;
private CompositeTransform _compositeTransform;
private bool forceManipulationsToEnd;

public Scenario4()
{
    this.InitializeComponent();
    forceManipulationsToEnd = false;
    ManipulateMe.ManipulationStarting += 
        new ManipulationStartingEventHandler(
            ManipulateMe_ManipulationStarting);
    ManipulateMe.ManipulationStarted += 
        new ManipulationStartedEventHandler(
            ManipulateMe_ManipulationStarted);
    ManipulateMe.ManipulationDelta += 
        new ManipulationDeltaEventHandler(
            ManipulateMe_ManipulationDelta);
    ManipulateMe.ManipulationCompleted += 
        new ManipulationCompletedEventHandler(
            ManipulateMe_ManipulationCompleted);
    ManipulateMe.ManipulationInertiaStarting += 
        new ManipulationInertiaStartingEventHandler(
            ManipulateMe_ManipulationInertiaStarting);
    InitManipulationTransforms();
}

private void InitManipulationTransforms()
{
    _transformGroup = new TransformGroup();
    _compositeTransform = new CompositeTransform();
    _previousTransform = new MatrixTransform() { 
        Matrix = Matrix.Identity };

    _transformGroup.Children.Add(_previousTransform);
    _transformGroup.Children.Add(_compositeTransform);

    ManipulateMe.RenderTransform = _transformGroup;
}

private void ManipulateMe_ManipulationStarting(object sender, 
    ManipulationStartingRoutedEventArgs e)
{
    forceManipulationsToEnd = false;
    e.Handled = true;
}

private void ManipulateMe_ManipulationStarted(
    object sender, ManipulationStartedRoutedEventArgs e)
{
    e.Handled = true;
}

private void ManipulateMe_ManipulationInertiaStarting(
    object sender, ManipulationInertiaStartingRoutedEventArgs e)
{
    e.Handled = true;
}

private void ManipulateMe_ManipulationDelta(
    object sender, ManipulationDeltaRoutedEventArgs e)
{
    if (forceManipulationsToEnd)
    {
        e.Complete();
        return;
    }

    _previousTransform.Matrix = _transformGroup.Value;

    Point center = _previousTransform.TransformPoint(
        new Point(e.Position.X, e.Position.Y));
    _compositeTransform.CenterX = center.X;
    _compositeTransform.CenterY = center.Y;

    _compositeTransform.Rotation = (e.Delta.Rotation * 180) / Math.PI;
    _compositeTransform.ScaleX = 
        _compositeTransform.ScaleY = e.Delta.Scale;
    _compositeTransform.TranslateX = e.Delta.Translation.X;
    _compositeTransform.TranslateY = e.Delta.Translation.Y;

    e.Handled = true;
}

private void ManipulateMe_ManipulationCompleted(object sender, 
    ManipulationCompletedRoutedEventArgs e)
{
    e.Handled = true;
}

private void Scenario4Reset(object sender, RoutedEventArgs e)
{
    Scenario4Reset();
}

void Scenario4Reset()
{
    forceManipulationsToEnd = true;
    ManipulateMe.RenderTransform = null;
    InitManipulationTransforms();
}

Private _transformGroup As TransformGroup
Private _previousTransform As MatrixTransform
Private _compositeTransform As CompositeTransform
Private forceManipulationsToEnd As Boolean

Public Sub New()
    Me.InitializeComponent()
    forceManipulationsToEnd = False
    AddHandler ManipulateMe.ManipulationStarting, AddressOf ManipulateMe_ManipulationStarting
    AddHandler ManipulateMe.ManipulationStarted, AddressOf ManipulateMe_ManipulationStarted
    AddHandler ManipulateMe.ManipulationDelta, AddressOf ManipulateMe_ManipulationDelta
    AddHandler ManipulateMe.ManipulationCompleted, AddressOf ManipulateMe_ManipulationCompleted
    InitManipulationTransforms()
End Sub

''' <summary>
''' Invoked when this page is about to be displayed in a Frame.
''' </summary>
''' <param name="e">Event data that describes how this page was reached.  The Parameter
''' property is typically used to configure the page.</param>
Protected Overrides Sub OnNavigatedTo(e As NavigationEventArgs)
End Sub

Private Sub InitManipulationTransforms()
    _transformGroup = New TransformGroup()
    _compositeTransform = New CompositeTransform()
    _previousTransform = New MatrixTransform() With { _
        .Matrix = Matrix.Identity _
    }

    _transformGroup.Children.Add(_previousTransform)
    _transformGroup.Children.Add(_compositeTransform)

    ManipulateMe.RenderTransform = _transformGroup
End Sub

Private Sub ManipulateMe_ManipulationStarting(sender As Object, e As ManipulationStartingRoutedEventArgs)
    forceManipulationsToEnd = False
    e.Handled = True
End Sub

Private Sub ManipulateMe_ManipulationStarted(sender As Object, e As ManipulationStartedRoutedEventArgs)
    e.Handled = True
End Sub

Private Sub ManipulateMe_ManipulationDelta(sender As Object, e As ManipulationDeltaRoutedEventArgs)
    If forceManipulationsToEnd Then
        e.Complete()
        Exit Sub
    End If

    _previousTransform.Matrix = _transformGroup.Value

    Dim center As Point = _previousTransform.TransformPoint(New Point(e.Position.X, e.Position.Y))
    _compositeTransform.CenterX = center.X
    _compositeTransform.CenterY = center.Y

    _compositeTransform.Rotation = (e.Delta.Rotation * 180) / Math.PI
    _compositeTransform.ScaleX = InlineAssignHelper(_compositeTransform.ScaleY, e.Delta.Scale)
    _compositeTransform.TranslateX = e.Delta.Translation.X
    _compositeTransform.TranslateY = e.Delta.Translation.Y

    e.Handled = True
End Sub

Private Sub ManipulateMe_ManipulationCompleted(sender As Object, e As ManipulationCompletedRoutedEventArgs)
    e.Handled = True
End Sub

Private Sub Scenario4ResetMethod(sender As Object, e As RoutedEventArgs)
    Reset()
End Sub

Private Sub Reset()
    forceManipulationsToEnd = True
    ManipulateMe.RenderTransform = Nothing
    InitManipulationTransforms()
End Sub
Private Shared Function InlineAssignHelper(Of T)(ByRef target As T, value As T) As T
    target = value
    Return value
End Function

Constructores

ManipulationStartingRoutedEventArgs()

Inicializa una nueva instancia de la clase ManipulationStartingRoutedEventArgs .

Propiedades

Container	Obtiene el UIElement que se considera el contenedor de la manipulación.
Handled	Obtiene o establece un valor que marca el evento enrutado como controlado. Si se establece en true , la mayoría de los controladores a lo largo de la ruta de eventos vuelven a controlar el mismo evento.
Mode	Obtiene o establece los tipos de manipulación que son posibles.
OriginalSource	Obtiene una referencia al objeto que generó el evento. Suele ser una parte de plantilla de un control en lugar de un elemento declarado en la interfaz de usuario de la aplicación. (Heredado de RoutedEventArgs)
Pivot	Obtiene o establece un objeto que describe el pivote de una manipulación de un solo punto.

Consulte también

• <xref:Windows.UI.Xaml.RoutedEventArgs%0andows.ui.xaml%2froutedeventargs.md)>