PointerRoutedEventArgs Klasse

Definition

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

Vererbung

Object Platform::Object IInspectable RoutedEventArgs PointerRoutedEventArgs

Attribute

ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows-Anforderungen

Beispiele

Das folgende Codebeispiel zeigt Szenario 2 aus dem Eingabebeispiel. Dieser Code zeigt einige Verwendungsmuster für die direkte Bearbeitung mit den Ereignissen PointerPressed, PointerReleased, PointerEntered, PointerExited und 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

Hinweise

In den meisten Fällen wird empfohlen, Zeigerinformationen über das Ereignisargument der Zeigerereignishandler im ausgewählten Sprachframework abzurufen (Windows-App mit JavaScript, UWP-App mit C++, C# oder Visual Basic oder UWP-App mit DirectX mit C++).

Wenn das Ereignisargument die für Ihre App erforderlichen Zeigerdetails nicht intrinsisch verfügbar macht, können Sie über die Methoden GetCurrentPoint und GetIntermediatePoints von PointerRoutedEventArgs Zugriff auf erweiterte Zeigerdaten erhalten. Verwenden Sie diese Methoden, um den Kontext der Zeigerdaten anzugeben.

Die statischen PointerPoint-MethodenGetCurrentPoint und GetIntermediatePoints verwenden immer den Kontext der App. Die PointerRoutedEventArgs-Ereignisdatenklasse wird für die folgenden Ereignisse verwendet:

• 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);
}

• Der Wert des Absenders (der sich in der Stellvertretungssignatur befindet, nicht in dieser Ereignisdatenklasse).
• Bestimmte Member von PointerRoutedEventArgs, z. B . KeyModifiers oder GetCurrentPoint.
• Werte einer Pointer-Gerätebeschreibungsklasse. Rufen Sie den Zeiger aus der Zeiger-Eigenschaft ab.
• Member, die aus der Konzeptualisierung der Systemeingabe eines PointerPoint stammen. Verwenden Sie die GetCurrentPoint-API , um einen PointerPoint-Wert abzurufen, und rufen Sie dann die PointerPoint-API auf, z. B. Position und PointerPointProperties.

Bestimmte Ereignisse verfügen häufig über Informationen in den verschiedenen Zeigergeräte- und Zeigerpunktklassen, die hauptsächlich nur für dieses Ereignis relevant sind. Wenn Sie beispielsweise PointerWheelChanged behandeln, interessieren Sie sich möglicherweise für mouseWheelDelta aus PointerPointProperties.

Das von den Methoden GetCurrentPoint und GetIntermediatePoints abgerufene Objekt ermöglicht den Zugriff auf erweiterte Zeigerinformationen über die Properties-Eigenschaft , die ein PointerPointProperties-Objekt abruft .

Im folgenden Beispiel erhalten wir erweiterte Zeigereigenschaften über die PointerPoint - und PointerPointProperties-Objekte . (Siehe Schnellstart: Zeiger für das vollständige Beispiel.)

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;
}

In der Regel wird das von dieser Methode zurückgegebene Objekt verwendet, um Zeigerdaten an ein GestureRecognizer-Objekt zu übergeben. Ein weiteres Szenario ist das Abrufen von MouseWheelDelta für ein PointerWheelChanged-Ereignis . Dieser Wert befindet sich in PointerPointProperties.

Versionsverlauf

Eigenschaften

Methoden

Gilt für:

Weitere Informationen

• RoutedEventArgs
• PointerPressed