internal static void InvalidateMeasureInSubtree(this UIElement element)
{
if (element == null || element.Visibility == Visibility.Collapsed)
{
return;
}
element.InvalidateMeasure();
foreach (UIElement element1 in VisualTreeHelpers.GetChildren(element))
{
VisualTreeHelpers.InvalidateMeasureInSubtree(element1);
}
}
public static void FocusDescendant(this FrameworkElement element)
{
VisualTreeHelpers.ForEachChildAndNodeDepth <DependencyObject>((DependencyObject)element, (Func <DependencyObject, bool>)(current =>
{
bool flag = true;
Control control = current as Control;
if (control != null)
{
flag = !control.Focus();
}
return(flag);
}));
}
public static object TryFindResource(this FrameworkElement thisObject, object resourceKey)
{
object requestedResource = (object)null;
VisualTreeHelpers.ForEachParentAndNode <FrameworkElement>((DependencyObject)thisObject, (Func <FrameworkElement, bool>)(fe =>
{
bool flag = true;
object obj = fe.Resources[resourceKey];
if (obj != null)
{
requestedResource = obj;
flag = false;
}
return(flag);
}));
if (requestedResource == null)
{
requestedResource = Application.Current.Resources[resourceKey];
}
return(requestedResource);
}
public static bool IsInVisualTree(this FrameworkElement thisObject)
{
bool flag = false;
DependencyObject visualTreeRoot = VisualTreeHelpers.GetVisualTreeRoot((DependencyObject)thisObject);
if (visualTreeRoot == Window.GetWindow((DependencyObject)thisObject))
{
flag = true;
}
else
{
FrameworkElement frameworkElement = visualTreeRoot as FrameworkElement;
if (frameworkElement != null)
{
Popup popup = frameworkElement.Parent as Popup;
if (popup != null && popup.IsOpen)
{
flag = true;
}
}
}
return(flag);
}
internal static void ForEachParent <TNodeType>(DependencyObject node, Func <TNodeType, bool> callback) where TNodeType : class
{
VisualTreeHelpers.ForEachParentAndNode <TNodeType>(VisualTreeHelper.GetParent(node), callback);
}