public static VisualStateGroup GetVisualStateGroup(this FrameworkElement root, string groupName)
{
foreach (FrameworkElement frameworkElement in ExtensionMethods.PrependWith <FrameworkElement>(ExtensionMethods.GetVisualAncestors(root), root))
{
foreach (object obj in (IEnumerable)VisualStateManager.GetVisualStateGroups(frameworkElement))
{
VisualStateGroup visualStateGroup = obj as VisualStateGroup;
if (visualStateGroup != null && visualStateGroup.Name == groupName)
{
return(visualStateGroup);
}
}
}
return((VisualStateGroup)null);
}
public static double GetHorizontalScrollOffset(this ListBox list)
{
return((ExtensionMethods.FindVisualChild((FrameworkElement)list, "ScrollViewer") as ScrollViewer).HorizontalOffset);
}
public static IEnumerable <FrameworkElement> GetVisualAncestors(this FrameworkElement node)
{
for (FrameworkElement parent = ExtensionMethods.GetVisualParent(node); parent != null; parent = ExtensionMethods.GetVisualParent(parent))
{
yield return(parent);
}
}
public static IEnumerable <T> GetVisibleItems <T>(this IEnumerable <T> items, FrameworkElement viewport, Orientation orientation) where T : FrameworkElement
{
return(Enumerable.TakeWhile <T>(Enumerable.SkipWhile <T>(items, (Func <T, bool>)(item => ExtensionMethods.TestVisibility((FrameworkElement)item, viewport, orientation, false))), (Func <T, bool>)(item => ExtensionMethods.TestVisibility((FrameworkElement)item, viewport, orientation, true))));
}