private void Tabs_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
{
CurrentItem = null;
}
if (e.OldItems != null)
{
foreach (var item in e.OldItems.OfType <TabItem>())
{
if (CurrentItem == item)
{
CurrentItem = null;
if (e.OldStartingIndex > 0)
{
int i = e.OldStartingIndex;
while (i > 0)
{
CurrentItem = Tabs[--i];
}
}
else if (Tabs.Count > 0)
{
CurrentItem = VisibleTabs.FirstOrDefault();
}
}
item.Parent = null;
UnregisterTabItem(item);
}
}
if (e.NewItems != null)
{
foreach (var item in e.NewItems.OfType <TabItem>())
{
item.Parent = this;
if (CurrentItem == null && (item.IsCurrentItem == true || item.Visibility == Visibility.Visible))
{
CurrentItem = item;
}
RegisterTabItem(item);
}
}
UpdateVisibilityState();
}
private bool IsVisibleTab(string id)
{
return(VisibleTabs != null && VisibleTabs.Contains(id, StringComparer.OrdinalIgnoreCase));
}
