PointerRoutedEventArgs Classe

Définition

public ref class PointerRoutedEventArgs 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)]
class PointerRoutedEventArgs 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)]
public sealed class PointerRoutedEventArgs : RoutedEventArgs

Public NotInheritable Class PointerRoutedEventArgs
Inherits RoutedEventArgs

Héritage

Object Platform::Object IInspectable RoutedEventArgs PointerRoutedEventArgs

Attributs

ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Configuration requise pour Windows

Exemples

L’exemple de code suivant illustre le scénario 2 de l’exemple Input. Ce code montre certains modèles d’utilisation pour la manipulation directe à l’aide des événements PointerPressed, PointerReleased, PointerEntered, PointerExited et PointerMoved .

<StackPanel x:Name="Scenario2Output" ManipulationMode="All">
  <StackPanel Orientation="Horizontal" Margin="0,10,0,0">
    <Button x:Name="scenario2Reset" Content="Reset" 
      Margin="0,0,10,0" Click="Scenario2Reset"/>
  </StackPanel>
  <StackPanel Orientation="Horizontal" >
    <ToggleSwitch x:Name="tbPointerCapture" 
      Header="Pointer Capture" FontSize="20"/>
    <TextBlock x:Name="txtCaptureStatus" 
      Style="{StaticResource BasicTextStyle}"/>
  </StackPanel>
  <Border x:Name="bEnteredExited" Background="Red" 
    Height="300" Width="450" CornerRadius="20" 
    HorizontalAlignment="Left">
    <Grid>
      <TextBlock Style="{StaticResource BasicTextStyle}" Text="" 
        HorizontalAlignment="Center" VerticalAlignment="Center" 
        x:Name="bEnteredExitedTextBlock"/>
      <Ellipse VerticalAlignment="Bottom" Stroke="Silver" 
        StrokeDashArray="2,2" StrokeThickness="2" Margin="2" 
        x:Name="bEnteredExitedTimer" Width="20" Height="20" 
        RenderTransformOrigin="0.5,0.5">
        <Ellipse.RenderTransform >
          <RotateTransform Angle="0" />
        </Ellipse.RenderTransform>
      </Ellipse>
    </Grid>
  </Border>
</StackPanel>

int _pointerCount;

public Scenario2()
{
    this.InitializeComponent();
    bEnteredExited.PointerEntered += bEnteredExited_PointerEntered;
    bEnteredExited.PointerExited += bEnteredExited_PointerExited;
    bEnteredExited.PointerPressed += bEnteredExited_PointerPressed;
    bEnteredExited.PointerReleased += bEnteredExited_PointerReleased;
    bEnteredExited.PointerMoved += bEnteredExited_PointerMoved;

    // To code for multiple Pointers (that is, fingers), 
    // we track how many entered/exited.
    _pointerCount = 0;
}

private void bEnteredExited_PointerMoved(object sender, 
    PointerRoutedEventArgs e)
{
    Scenario2UpdateVisuals(sender as Border, "Moved");
}

private void bEnteredExited_PointerReleased(object sender, 
    PointerRoutedEventArgs e)
{
    ((Border)sender).ReleasePointerCapture(e.Pointer);
    txtCaptureStatus.Text = string.Empty;
}

//Can only get capture on PointerPressed (i.e. touch down, mouse click, pen press)
private void bEnteredExited_PointerPressed(object sender, 
    PointerRoutedEventArgs e)
{
    if (tbPointerCapture.IsOn)
    {
        bool _hasCapture = ((Border)sender).CapturePointer(e.Pointer);
        txtCaptureStatus.Text = "Got Capture: " + _hasCapture;
    }
}

private void bEnteredExited_PointerExited(object sender, 
    PointerRoutedEventArgs e)
{
    _pointerCount--;
    Scenario2UpdateVisuals(sender as Border, "Exited");
}

private void bEnteredExited_PointerEntered(object sender, 
    PointerRoutedEventArgs e)
{
    _pointerCount++;
    Scenario2UpdateVisuals(sender as Border, "Entered");
}

private void Scenario2UpdateVisuals(Border border, 
    String eventDescription)
{
    switch (eventDescription.ToLower())
    {
        case "exited":
            if (_pointerCount <= 0)
            {
                border.Background = new SolidColorBrush(Colors.Red);
                bEnteredExitedTextBlock.Text = eventDescription;
            }
            break;
        case "moved":
            RotateTransform rt = 
                (RotateTransform)bEnteredExitedTimer.RenderTransform;
            rt.Angle += 2;
            if (rt.Angle > 360) rt.Angle -= 360;
            break;
        default:
            border.Background = new SolidColorBrush(Colors.Green);
            bEnteredExitedTextBlock.Text = eventDescription;
            break;
    }
}

private void Scenario2Reset(object sender, RoutedEventArgs e)
{
    Scenario2Reset();
}

private void Scenario2Reset()
{
    bEnteredExited.Background = new SolidColorBrush(Colors.Green);
    bEnteredExitedTextBlock.Text = string.Empty;
}

Private _pointerCount As Integer

Public Sub New()
    Me.InitializeComponent()
    AddHandler bEnteredExited.PointerEntered, AddressOf bEnteredExited_PointerEntered
    AddHandler bEnteredExited.PointerExited, AddressOf bEnteredExited_PointerExited
    AddHandler bEnteredExited.PointerPressed, AddressOf bEnteredExited_PointerPressed
    AddHandler bEnteredExited.PointerReleased, AddressOf bEnteredExited_PointerReleased
    AddHandler bEnteredExited.PointerMoved, AddressOf bEnteredExited_PointerMoved

    'To code for multiple Pointers (i.e. Fingers) we track how many entered/exited.
    _pointerCount = 0
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 bEnteredExited_PointerMoved(sender As Object, e As PointerRoutedEventArgs)
    Scenario2UpdateVisuals(TryCast(sender, Border), "Moved")
End Sub

Private Sub bEnteredExited_PointerReleased(sender As Object, e As PointerRoutedEventArgs)
    DirectCast(sender, Border).ReleasePointerCapture(e.Pointer)
    txtCaptureStatus.Text = String.Empty
End Sub

'Can only get capture on PointerPressed (i.e. touch down, mouse click, pen press)
Private Sub bEnteredExited_PointerPressed(sender As Object, e As PointerRoutedEventArgs)
    If tbPointerCapture.IsOn Then
        Dim _hasCapture As Boolean = DirectCast(sender, Border).CapturePointer(e.Pointer)
        txtCaptureStatus.Text = "Got Capture: " & _hasCapture
    End If
End Sub

Private Sub bEnteredExited_PointerExited(sender As Object, e As PointerRoutedEventArgs)
    _pointerCount -= 1
    Scenario2UpdateVisuals(TryCast(sender, Border), "Exited")
End Sub

Private Sub bEnteredExited_PointerEntered(sender As Object, e As PointerRoutedEventArgs)
    _pointerCount += 1
    Scenario2UpdateVisuals(TryCast(sender, Border), "Entered")

End Sub

Private Sub Scenario2UpdateVisuals(border As Border, eventDescription As String)
    Select Case eventDescription.ToLower()
        Case "exited"
            If _pointerCount <= 0 Then
                border.Background = New SolidColorBrush(Colors.Red)
                bEnteredExitedTextBlock.Text = eventDescription
            End If
            Exit Select
        Case "moved"

            Dim rt As RotateTransform = DirectCast(bEnteredExitedTimer.RenderTransform, RotateTransform)
            rt.Angle += 2
            If rt.Angle > 360 Then
                rt.Angle -= 360
            End If
            Exit Select
        Case Else
            border.Background = New SolidColorBrush(Colors.Green)
            bEnteredExitedTextBlock.Text = eventDescription
            Exit Select

    End Select
End Sub

Private Sub Scenario2ResetMethod(sender As Object, e As RoutedEventArgs)
    Reset()
End Sub

Private Sub Reset()
    bEnteredExited.Background = New SolidColorBrush(Colors.Green)
    bEnteredExitedTextBlock.Text = String.Empty
End Sub

Remarques

Dans la plupart des cas, nous vous recommandons d’obtenir des informations de pointeur via l’argument d’événement des gestionnaires d’événements de pointeur dans l’infrastructure de langage de votre choix (application Windows utilisant JavaScript, application UWP utilisant C++, C# ou Visual Basic, ou application UWP utilisant DirectX avec C++).

Si l’argument d’événement n’expose pas intrinsèquement les détails du pointeur requis par votre application, vous pouvez accéder aux données de pointeur étendues via les méthodes GetCurrentPoint et GetIntermediatePoints de PointerRoutedEventArgs. Utilisez ces méthodes pour spécifier le contexte des données du pointeur.

Les méthodes Pointeurstatiques GetCurrentPoint et GetIntermediatePoints utilisent toujours le contexte de l’application. La classe de données d’événement PointerRoutedEventArgs est utilisée pour ces événements :

• PointerPressed
• PointerCanceled
• PointerCaptureLost
• PointerEntered
• PointerExited
• PointerMoved
• PointerReleased
• PointerWheelChanged

private void Target_PointerMoved(object sender, PointerRoutedEventArgs e)
{
    Windows.UI.Xaml.Input.Pointer ptr = e.Pointer;

    // Multiple, simultaneous mouse button inputs are processed here.
    // Mouse input is associated with a single pointer assigned when 
    // mouse input is first detected. 
    // Clicking additional mouse buttons (left, wheel, or right) during 
    // the interaction creates secondary associations between those buttons 
    // and the pointer through the pointer pressed event. 
    // The pointer released event is fired only when the last mouse button 
    // associated with the interaction (not necessarily the initial button) 
    // is released. 
    // Because of this exclusive association, other mouse button clicks are 
    // routed through the pointer move event.          
    if (ptr.PointerDeviceType == Windows.Devices.Input.PointerDeviceType.Mouse)
    {
        // To get mouse state, we need extended pointer details.
        // We get the pointer info through the getCurrentPoint method
        // of the event argument. 
        Windows.UI.Input.PointerPoint ptrPt = e.GetCurrentPoint(Target);
        if (ptrPt.Properties.IsLeftButtonPressed)
        {
            eventLog.Text += "\nLeft button: " + ptrPt.PointerId;
        }
        if (ptrPt.Properties.IsMiddleButtonPressed)
        {
            eventLog.Text += "\nWheel button: " + ptrPt.PointerId;
        }
        if (ptrPt.Properties.IsRightButtonPressed)
        {
            eventLog.Text += "\nRight button: " + ptrPt.PointerId;
        }
    }

    // Prevent most handlers along the event route from handling the same event again.
    e.Handled = true;

    // Display pointer details.
    updateInfoPop(e);
}

private void Target_PointerMoved(object sender, PointerRoutedEventArgs e)
{
    Windows.UI.Xaml.Input.Pointer ptr = e.Pointer;

    // Multiple, simultaneous mouse button inputs are processed here.
    // Mouse input is associated with a single pointer assigned when 
    // mouse input is first detected. 
    // Clicking additional mouse buttons (left, wheel, or right) during 
    // the interaction creates secondary associations between those buttons 
    // and the pointer through the pointer pressed event. 
    // The pointer released event is fired only when the last mouse button 
    // associated with the interaction (not necessarily the initial button) 
    // is released. 
    // Because of this exclusive association, other mouse button clicks are 
    // routed through the pointer move event.          
    if (ptr.PointerDeviceType == Windows.Devices.Input.PointerDeviceType.Mouse)
    {
        // To get mouse state, we need extended pointer details.
        // We get the pointer info through the getCurrentPoint method
        // of the event argument. 
        Windows.UI.Input.PointerPoint ptrPt = e.GetCurrentPoint(Target);
        if (ptrPt.Properties.IsLeftButtonPressed)
        {
            eventLog.Text += "\nLeft button: " + ptrPt.PointerId;
        }
        if (ptrPt.Properties.IsMiddleButtonPressed)
        {
            eventLog.Text += "\nWheel button: " + ptrPt.PointerId;
        }
        if (ptrPt.Properties.IsRightButtonPressed)
        {
            eventLog.Text += "\nRight button: " + ptrPt.PointerId;
        }
    }

    // Prevent most handlers along the event route from handling the same event again.
    e.Handled = true;

    // Display pointer details.
    updateInfoPop(e);
}

• Valeur de l’expéditeur (qui se trouve sur la signature du délégué, et non sur cette classe de données d’événement).
• Membres spécifiques de PointerRoutedEventArgs, tels que KeyModifiers ou GetCurrentPoint.
• Valeurs d’une classe de description d’appareil pointeur . Obtenez le pointeur à partir de la propriété Pointeur .
• Membres qui proviennent de la conceptualisation d’entrée système d’un Pointeur. Utilisez l’API GetCurrentPoint pour obtenir une valeur PointerPoint , puis appelez l’API PointerPoint telle que Position et PointerPointProperties.

Des événements spécifiques ont souvent des informations disponibles dans les différentes classes de pointeur et de pointeur qui sont principalement pertinentes pour cet événement. Par exemple, lorsque vous gérez PointerWheelChanged, le MouseWheelDelta de PointerPointProperties peut vous intéresser.

L’objet récupéré par les méthodes GetCurrentPoint et GetIntermediatePoints donne accès aux informations de pointeur étendues via la propriété Properties , qui obtient un objet PointerPointProperties .

Dans l’exemple suivant, nous obtenons des propriétés de pointeur étendues via les objets PointerPoint et PointerPointProperties . (Voir Démarrage rapide : Pointeurs pour obtenir l’exemple complet.)

String queryPointer(PointerPoint ptrPt)
{
    String details = "";

    switch (ptrPt.PointerDevice.PointerDeviceType)
    {
        case Windows.Devices.Input.PointerDeviceType.Mouse:
            details += "\nPointer type: mouse";
            break;
        case Windows.Devices.Input.PointerDeviceType.Pen:
            details += "\nPointer type: pen";
            if (ptrPt.IsInContact)
            {
                details += "\nPressure: " + ptrPt.Properties.Pressure;
                details += "\nrotation: " + ptrPt.Properties.Orientation;
                details += "\nTilt X: " + ptrPt.Properties.XTilt;
                details += "\nTilt Y: " + ptrPt.Properties.YTilt;
                details += "\nBarrel button pressed: " + ptrPt.Properties.IsBarrelButtonPressed;
            }
            break;
        case Windows.Devices.Input.PointerDeviceType.Touch:
            details += "\nPointer type: touch";
            details += "\nrotation: " + ptrPt.Properties.Orientation;
            details += "\nTilt X: " + ptrPt.Properties.XTilt;
            details += "\nTilt Y: " + ptrPt.Properties.YTilt;
            break;
        default:
            details += "\nPointer type: n/a";
            break;
    }

    GeneralTransform gt = Target.TransformToVisual(page);
    Point screenPoint;

    screenPoint = gt.TransformPoint(new Point(ptrPt.Position.X, ptrPt.Position.Y));
    details += "\nPointer Id: " + ptrPt.PointerId.ToString() +
        "\nPointer location (parent): " + ptrPt.Position.X + ", " + ptrPt.Position.Y +
        "\nPointer location (screen): " + screenPoint.X + ", " + screenPoint.Y;
    return details;
}

En règle générale, l’objet retourné par cette méthode est utilisé pour alimenter des données de pointeur vers un objet GestureRecognizer. Un autre scénario consiste à obtenir le MouseWheelDelta pour un événement PointerWheelChanged ; cette valeur se trouve dans PointerPointProperties.

Historique des versions

Propriétés

Méthodes

S’applique à

Voir aussi

• RoutedEventArgs
• PointerPressed