/// <summary>
/// We use this function to get the TabItemAutomationPeer associated with the TabItem
/// </summary>
/// <param name="item">TabItem that we are seeking to find the AutomationPeer for</param>
/// <returns>The TabItemAutomationPeer for the specified TabItem</returns>
internal static TabItemAutomationPeer GetTabItemAutomationPeer(TabItem item)
{
TabControlAutomationPeer tabControlPeer = TabControlAutomationPeer.FromElement(item.TabControlParent) as TabControlAutomationPeer;
if (tabControlPeer == null)
{
tabControlPeer = TabControlAutomationPeer.CreatePeerForElement(item.TabControlParent) as TabControlAutomationPeer;
}
if (tabControlPeer != null)
{
List <AutomationPeer> children = tabControlPeer.GetChildren();
if (children != null)
{
foreach (AutomationPeer peer in children)
{
TabItemAutomationPeer tabItemPeer = peer as TabItemAutomationPeer;
if (tabItemPeer != null && tabItemPeer.Owner == item)
{
return(tabItemPeer);
}
}
}
}
return(null);
}
/// <summary>
/// IsSelected changed handler
/// </summary>
/// <param name="d">TabItem that changed IsSelected.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TabItem tabItem = d as TabItem;
Debug.Assert(tabItem != null);
bool isSelected = (bool)e.NewValue;
RoutedEventArgs args = new RoutedEventArgs();
if (isSelected)
{
tabItem.OnSelected(args);
}
else
{
tabItem.OnUnselected(args);
}
// fire the IsSelectedChanged event for automation
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementSelected))
{
TabControl parentSelector = tabItem.TabControlParent;
if (parentSelector != null)
{
TabItemAutomationPeer tabItemPeer = GetTabItemAutomationPeer(tabItem);
if (tabItemPeer != null)
{
tabItemPeer.RaiseAutomationIsSelectedChanged(isSelected);
}
}
}
tabItem.IsTabStop = isSelected;
tabItem.UpdateVisualState();
}
