internal static bool TryRemoveManipulator(UIElement element, IManipulator manipulator)
{
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
device.RemoveManipulator(manipulator);
return(true);
}
return(false);
}
internal static bool TryCompleteManipulation(UIElement element)
{
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
device.CompleteManipulation(/* withInertia = */ false);
return(true);
}
return(false);
}
private static ManipulationDevice GetActiveManipulationDevice(UIElement element)
{
Debug.Assert(element != null, "element should be non-null.");
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if ((device != null) && device.IsManipulationActive)
{
return(device);
}
return(null);
}
/// <summary>
/// If a manipulation is active, forces the manipulation to proceed to the inertia phase.
/// If inertia is already occurring, it will restart inertia.
/// </summary>
/// <param name="element">The element on which there is an active manipulation.</param>
public static void StartInertia(UIElement element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
device.CompleteManipulation(/* withInertia = */ true);
}
}
/// <summary>
/// Retrieves the pivot for single-finger manipulation on an active manipulation.
/// </summary>
/// <param name="element">The element on which there is an active manipulation.</param>
/// <returns>The pivot for single-finger manipulation.</returns>
public static ManipulationPivot GetManipulationPivot(UIElement element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
return(device.ManipulationPivot);
}
return(null);
}
/// <summary>
/// Retrieves the container that defines the coordinate space of event data
/// for an active manipulation.
/// </summary>
/// <param name="element">The element on which there is an active manipulation.</param>
/// <returns>The container that defines the coordinate space.</returns>
public static IInputElement GetManipulationContainer(UIElement element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
return(device.ManipulationContainer);
}
return(null);
}
/// <summary>
/// Retrieves the current manipulation mode of an active manipulation.
/// </summary>
/// <param name="element">The element on which there is an active manipulation.</param>
/// <returns>The current manipulation mode.</returns>
public static ManipulationModes GetManipulationMode(UIElement element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
ManipulationDevice device = ManipulationDevice.GetManipulationDevice(element);
if (device != null)
{
return(device.ManipulationMode);
}
else
{
return(ManipulationModes.None);
}
}