UIElement.ReleaseMouseCapture UIElement.ReleaseMouseCapture UIElement.ReleaseMouseCapture UIElement.ReleaseMouseCapture Method

Определение

Освобождает мышь, если элемент произвел ее захват.Releases the mouse capture, if this element held the capture.

public:
 virtual void ReleaseMouseCapture();
public void ReleaseMouseCapture ();
abstract member ReleaseMouseCapture : unit -> unit
override this.ReleaseMouseCapture : unit -> unit
Public Sub ReleaseMouseCapture ()

Реализации

Примеры

Следующий пример является параллельным с примером, заданным для CaptureMouse: он обрабатывает кнопку мыши, чтобы освободить захват мыши, и снова включите перемещение мыши.The following example is the parallel to the example given for CaptureMouse: it handles mouse button up to release mouse capture and re-enable moving the mouse.

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

Комментарии

Если этот элемент не удерживает записи, вызов этого метода не оказывает никакого влияния.If this element did not hold the capture, calling this method has no effect. Рассмотрите возможность проверки значения IsMouseCaptured перед вызовом этого метода.Consider checking the value of IsMouseCaptured before you call this method.

Применяется к

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