internal static bool IsAncestorOf(DependencyObject reference, DependencyObject descendant)
{
Visual visual;
Visual3D visual3D;
VisualTreeUtils.AsNonNullVisual(reference, out visual, out visual3D);
// x86 branch prediction skips the branch on first encounter. We favor 2D.
if (visual3D != null)
{
return(visual3D.IsAncestorOf(descendant));
}
return(visual.IsAncestorOf(descendant));
}
internal static DependencyObject FindCommonAncestor(DependencyObject reference, DependencyObject otherVisual)
{
Visual visual;
Visual3D visual3D;
VisualTreeUtils.AsNonNullVisual(reference, out visual, out visual3D);
// x86 branch prediction skips the branch on first encounter. We favor 2D.
if (visual3D != null)
{
return(visual3D.FindCommonVisualAncestor(otherVisual));
}
return(visual.FindCommonVisualAncestor(otherVisual));
}
/// <summary>
/// Visual parent of this Visual.
/// </summary>
public static DependencyObject GetParent(DependencyObject reference)
{
Visual visual;
Visual3D visual3D;
VisualTreeUtils.AsNonNullVisual(reference, out visual, out visual3D);
// x86 branch prediction skips the branch on first encounter. We favor 2D.
if (visual3D != null)
{
return(visual3D.InternalVisualParent);
}
return(visual.InternalVisualParent);
}
/// <summary>
/// Returns the child of Visual visual at the specified index.
/// </summary>
public static DependencyObject GetChild(DependencyObject reference, int childIndex)
{
Visual visual;
Visual3D visual3D;
VisualTreeUtils.AsNonNullVisual(reference, out visual, out visual3D);
// x86 branch prediction skips the branch on first encounter. We favor 2D.
if (visual3D != null)
{
return(visual3D.InternalGet2DOr3DVisualChild(childIndex));
}
//
// Even though visual is a 2D visual, it still may have
// 3D children.
//
return(visual.InternalGet2DOr3DVisualChild(childIndex));
}
