// Add a preopportunity handler for the logical parent incase of templated element.
internal static void AddParentPreOpportunityHandler(DependencyObject o, EventRoute route, RoutedEventArgs args)
{
// If the logical parent is different from visual parent then add handler on behalf of the
// parent into the route. This is to cover the templated elements, where event could be
// handled by one of the child visual element but we should consider it as if event is handled by
// parent element ( logical parent).
DependencyObject visualParent = null;
if (o is Visual || o is Visual3D)
{
visualParent = UIElementHelper.GetUIParent(o);
}
DependencyObject logicalParent = SynchronizedInputHelper.GetUIParentCore(o);
if (logicalParent != null && logicalParent != visualParent)
{
UIElement e = logicalParent as UIElement;
if (e != null)
{
e.AddSynchronizedInputPreOpportunityHandler(route, args);
}
else
{
ContentElement ce = logicalParent as ContentElement;
if (ce != null)
{
ce.AddSynchronizedInputPreOpportunityHandler(route, args);
}
else
{
UIElement3D e3D = logicalParent as UIElement3D;
if (e3D != null)
{
e3D.AddSynchronizedInputPreOpportunityHandler(route, args);
}
}
}
}
}
