UIElement.CaptureMouse UIElement.CaptureMouse UIElement.CaptureMouse UIElement.CaptureMouse Method

Definición

Intenta forzar la captura del mouse en este elemento.Attempts to force capture of the mouse to this element.

public:
 virtual bool CaptureMouse();
public bool CaptureMouse ();
abstract member CaptureMouse : unit -> bool
override this.CaptureMouse : unit -> bool
Public Function CaptureMouse () As Boolean

Devoluciones

Es true si se captura el mouse correctamente; de lo contrario, es false.true if the mouse is successfully captured; otherwise, false.

Implementaciones

Ejemplos

En el ejemplo siguiente se implementa un par de controladores para la combinación de mouse y entrada de tecla que capturan (y descapturan) el mouse y habilitan un modo especial de mouse para ver un modelo 3D.The following example implements a pair of handlers for mouse and key input combination that capture (and uncapture) the mouse and enable a special mouse mode for viewing a 3D model.

private void MouseDownHandler(object sender, MouseButtonEventArgs e)
{
    if (!Enabled) return;
    e.Handled = true;


    if (Keyboard.IsKeyDown(Key.F1) == true)
    {
        Reset();
        return;
    }

    UIElement el = (UIElement)sender;
    _point = e.MouseDevice.GetPosition(el);
    // Initialize the center of rotation to the lookatpoint
    if (!_centered)
    {
        ProjectionCamera camera = (ProjectionCamera)_slaves[0].Camera;
        _center = camera.LookDirection;
        _centered = true;
    }

    _scaling = (e.MiddleButton == MouseButtonState.Pressed);

    if (Keyboard.IsKeyDown(Key.Space) == false)
        _rotating = true;
    else
        _rotating = false;

    el.CaptureMouse();
}

private void MouseUpHandler(object sender, MouseButtonEventArgs e)
{
    if (!_enabled) return;
    e.Handled = true;

    // Stuff the current initial + delta into initial so when we next move we
    // start at the right place.
    if (_rotating == true)
        _rotation = _rotationDelta * _rotation;
    else
    {
        _translate += _translateDelta;
        _translateDelta.X = 0;
        _translateDelta.Y = 0;
    }

    //_scale = _scaleDelta*_scale;
    UIElement el = (UIElement)sender;
    el.ReleaseMouseCapture();
}
Private Sub MouseDownHandler(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    If Not Enabled Then
        Return
    End If
    e.Handled = True


    If Keyboard.IsKeyDown(Key.F1) = True Then
        Reset()
        Return
    End If

    Dim el As UIElement = CType(sender, UIElement)
    _point = e.MouseDevice.GetPosition(el)
    ' Initialize the center of rotation to the lookatpoint
    If Not _centered Then
        Dim camera As ProjectionCamera = CType(_slaves(0).Camera, ProjectionCamera)
        _center = camera.LookDirection
        _centered = True
    End If

    _scaling = (e.MiddleButton = MouseButtonState.Pressed)

    If Keyboard.IsKeyDown(Key.Space) = False Then
        _rotating = True
    Else
        _rotating = False
    End If

    el.CaptureMouse()
End Sub

Private Sub MouseUpHandler(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    If Not _enabled Then
        Return
    End If
    e.Handled = True

    ' Stuff the current initial + delta into initial so when we next move we
    ' start at the right place.
    If _rotating = True Then
        _rotation = _rotationDelta * _rotation
    Else
        _translate += _translateDelta
        _translateDelta.X = 0
        _translateDelta.Y = 0
    End If

    '_scale = _scaleDelta * _scale
    Dim el As UIElement = CType(sender, UIElement)
    el.ReleaseMouseCapture()
End Sub

Comentarios

Para que se Capture, se debe habilitar un elemento.To be captured, an element must be enabled. Compruebe si IsEnabled es true antes de llamar CaptureMousea.Check whether IsEnabled is true before you call CaptureMouse.

Si la CaptureMouse llamada truea devuelve IsMouseCaptured , también truees.If calling CaptureMouse returns true, then IsMouseCaptured is also true.

Si la CaptureMouse llamada truea devuelve, GotMouseCapture se IsMouseCapturedChanged generan los eventos y, RoutedEventArgs.Source con en los datos de evento que se han comunicado CaptureMouse como el elemento en el que se llama al método.If calling CaptureMouse returns true, then the GotMouseCapture and IsMouseCapturedChanged events are raised, with RoutedEventArgs.Source in the event data reported as the element where the CaptureMouse method is called. Si fuerza la captura, podría interferir con las capturas existentes, especialmente con las capturas relacionadas con la función de arrastrar y colocar con el mouse.If you force capture, you might interfere with existing captures - especially with captures that relate to drag-and-drop with the mouse.

Para borrar la captura del mouse de todos los Mouse.Capture elementos, element llame a con nullel parámetro proporcionado como.To clear mouse capture from all elements, call Mouse.Capture with the element parameter provided as null.

Se aplica a

Consulte también: