private GazeTargetItem GetHitTarget(Point gazePoint)
{
GazeTargetItem invokable = null;
if (!IsAlwaysActivated)
{
invokable = NonInvokeGazeTargetItem;
}
switch (Window.Current.CoreWindow.ActivationMode)
{
case CoreWindowActivationMode.ActivatedInForeground:
case CoreWindowActivationMode.ActivatedNotForeground:
var elements = VisualTreeHelper.FindElementsInHostCoordinates(gazePoint, null, false);
var element = elements.FirstOrDefault();
invokable = null;
if (element != null)
{
invokable = GazeTargetItem.GetOrCreate(element);
while (element != null && !invokable.IsInvokable)
{
element = VisualTreeHelper.GetParent(element) as UIElement;
if (element != null)
{
invokable = GazeTargetItem.GetOrCreate(element);
}
}
}
if (element == null || !invokable.IsInvokable)
{
invokable = NonInvokeGazeTargetItem;
}
else
{
Interaction interaction;
do
{
interaction = GazeInput.GetInteraction(element);
if (interaction == Interaction.Inherited)
{
element = GetInheritenceParent(element);
}
}while (interaction == Interaction.Inherited && element != null);
if (interaction == Interaction.Inherited)
{
interaction = GazeInput.Interaction;
}
if (interaction != Interaction.Enabled)
{
invokable = NonInvokeGazeTargetItem;
}
}
break;
}
return(invokable);
}
/// <summary>
/// Invoke the default action of the specified UIElement.
/// </summary>
public static void Invoke(UIElement element)
{
var item = GazeTargetItem.GetOrCreate(element);
item.Invoke();
}
