internal static void ReleaseAllCaptures(IInputElement element)
{
if (_activeDevices != null)
{
int count = _activeDevices.Count;
for (int i = 0; i < count; i++)
{
TouchDevice device = _activeDevices[i];
if (device.Captured == element)
{
device.Capture(null);
}
}
}
}
private void OnReevaluateCapture(object sender, DependencyPropertyChangedEventArgs e)
{
// IsEnabled, IsVisible, and/or IsHitTestVisible became false
if (!(bool)e.NewValue)
{
if (_reevaluateCapture == null)
{
_reevaluateCapture = Dispatcher.BeginInvoke(DispatcherPriority.Input,
(DispatcherOperationCallback) delegate(object args)
{
TouchDevice thisRef = (TouchDevice)args;
thisRef._reevaluateCapture = null;
thisRef.Capture(null);
return(null);
}, this);
}
}
}
/// <summary>
/// Releases capture from the specified touch device.
/// </summary>
/// <param name="touchDevice">The device that is captured to this element.</param>
/// <returns>true if capture was released, false otherwise.</returns>
public bool ReleaseTouchCapture(TouchDevice touchDevice)
{
if (touchDevice == null)
{
throw new ArgumentNullException("touchDevice");
}
if (touchDevice.Captured == this)
{
touchDevice.Capture(null);
return true;
}
else
{
return false;
}
}
/// <summary>
/// Captures the specified device to this element.
/// </summary>
/// <param name="touchDevice">The touch device to capture.</param>
/// <returns>True if capture was taken.</returns>
public bool CaptureTouch(TouchDevice touchDevice)
{
if (touchDevice == null)
{
throw new ArgumentNullException("touchDevice");
}
return touchDevice.Capture(this);
}