// Private Extension for DependencyObject
// Return the first child of a given type, and passing the Checker delegate
private static TT ChildOfType <TT>(this DependencyObject element, Predicate <TT> checker) where TT : DependencyObject
{
if (element == null)
{
return(null);
}
if (element is ContentControl)
{
DependencyObject child = (element as ContentControl).Content as DependencyObject;
TT childFound = child.ChildOfTypeSearch(checker);
if (childFound != null)
{
return(childFound);
}
}
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(element); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(element, i);
TT childFound = child.ChildOfTypeSearch(checker);
if (childFound != null)
{
return(childFound);
}
}
return(null);
}
