UIElement.ReleaseMouseCapture 方法

定義

命名空間:

System.Windows

組件:

PresentationCore.dll

如果這個項目保有滑鼠捕捉，則釋放捕捉。

C#

public void ReleaseMouseCapture ();

實作

ReleaseMouseCapture()

範例

下列範例與指定的 CaptureMouse 範例平行：它會將滑鼠按鍵向上處理，以釋放滑鼠擷取並重新啟用移動滑鼠。

C#

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();
}

備註

如果這個專案未保存擷取，則呼叫這個方法沒有任何作用。 請考慮在呼叫這個方法之前檢查 的值 IsMouseCaptured 。

適用於

另請參閱

• IsMouseCaptured