public static DependencyObject FindAncestorByType(DependencyObject element, Type type, bool specificTypeOnly)
{
if (element == null)
{
return(null);
}
if (specificTypeOnly ? (element.GetType() == type)
: (element.GetType() == type) || (element.GetType().IsSubclassOf(type)))
{
return(element);
}
return(VisualTreeHelperEx.FindAncestorByType(VisualTreeHelper.GetParent(element), type, specificTypeOnly));
}
public static T FindAncestorByType <T>(DependencyObject depObj) where T : DependencyObject
{
if (depObj == null)
{
return(default(T));
}
if (depObj is T)
{
return(( T )depObj);
}
T parent = default(T);
parent = VisualTreeHelperEx.FindAncestorByType <T>(VisualTreeHelper.GetParent(depObj));
return(parent);
}
private static GraphAreaBase GetAreaFromObject(object obj)
{
GraphAreaBase area = null;
if (obj is VertexControl)
{
area = ((VertexControl)obj).RootArea;
}
else if (obj is EdgeControl)
{
area = ((EdgeControl)obj).RootArea;
}
else if (obj is DependencyObject)
{
area = VisualTreeHelperEx.FindAncestorByType((DependencyObject)obj, typeof(GraphAreaBase), false) as GraphAreaBase;
}
return(area);
}