private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var group = d as RadPaneGroup;
var oldValue = e.OldValue as IEnumerable <RadPane>;
var newValue = e.NewValue as IEnumerable <RadPane>;
var oldValueObservableCollection = e.OldValue as INotifyCollectionChanged;
var newValueObservableCollection = e.NewValue as INotifyCollectionChanged;
if (group != null)
{
var extension = GetPaneGroupExtension(group);
if (extension == null)
{
extension = new PaneGroupExtensions {
Group = group
};
SetPaneGroupExtension(group, extension);
}
if (oldValue != null)
{
foreach (var pane in oldValue)
{
pane.RemoveFromParent();
}
if (oldValueObservableCollection != null)
{
oldValueObservableCollection.CollectionChanged -= extension.OnItemsSourceCollectionChanged;
}
}
if (newValue != null)
{
foreach (var pane in newValue)
{
group.Items.Add(pane);
}
if (newValueObservableCollection != null)
{
newValueObservableCollection.CollectionChanged += extension.OnItemsSourceCollectionChanged;
}
}
}
}
private static void SetPaneGroupExtension(DependencyObject obj, PaneGroupExtensions value)
{
obj.SetValue(PaneGroupExtensionProperty, value);
}