/// <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>
/// A virtual function that is called when the selection is changed. Default behavior
/// is to raise a SelectionChangedEvent
/// </summary>
/// <param name="e">The inputs for this event. Can be raised (default behavior) or processed
/// in some other way.</param>
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
base.OnSelectionChanged(e);
if (IsKeyboardFocusWithin)
{
// If keyboard focus is within the control, make sure it is going to the correct place
TabItem item = GetSelectedTabItem();
if (item != null)
{
item.SetFocus();
}
}
UpdateSelectedContent();
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionPatternOnInvalidated) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementSelected) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementAddedToSelection) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection))
{
TabControlAutomationPeer peer = UIElementAutomationPeer.CreatePeerForElement(this) as TabControlAutomationPeer;
if (peer != null)
{
peer.RaiseSelectionEvents(e);
}
}
}
/// <summary>
/// A virtual function that is called when the selection is changed. Default behavior
/// is to raise a SelectionChangedEvent
/// </summary>
/// <param name="e">The inputs for this event. Can be raised (default behavior) or processed
/// in some other way.</param>
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
if (MS.Internal.FrameworkAppContextSwitches.SelectionPropertiesCanLagBehindSelectionChangedEvent)
{
// old ("useless") behavior, retained for app-compat
base.OnSelectionChanged(e);
if (IsKeyboardFocusWithin)
{
// If keyboard focus is within the control, make sure it is going to the correct place
TabItem item = GetSelectedTabItem();
if (item != null)
{
item.SetFocus();
}
}
UpdateSelectedContent();
}
else
{
// new behavior (DDVSO 208019) - change SelectedContent and focus
// before raising SelectionChanged.
bool isKeyboardFocusWithin = IsKeyboardFocusWithin;
UpdateSelectedContent();
if (isKeyboardFocusWithin)
{
// If keyboard focus is within the control, make sure it is going to the correct place
TabItem item = GetSelectedTabItem();
if (item != null)
{
item.SetFocus();
}
}
base.OnSelectionChanged(e);
}
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionPatternOnInvalidated) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementSelected) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementAddedToSelection) ||
AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection))
{
TabControlAutomationPeer peer = UIElementAutomationPeer.CreatePeerForElement(this) as TabControlAutomationPeer;
if (peer != null)
{
peer.RaiseSelectionEvents(e);
}
}
}
public void TabControlAutomationPeerTest()
{
TabControl tabControl = new TabControl();
TabItem tabItem = new TabItem();
TabControlAutomationPeer peer = ((TabControlAutomationPeer)TabControlAutomationPeer.CreatePeerForElement(tabControl));
ISelectionProvider selector = (ISelectionProvider)peer.GetPattern(PatternInterface.Selection);
CreateAsyncTask(tabControl,
() => Assert.IsFalse(selector.CanSelectMultiple),
() => Assert.IsTrue(selector.IsSelectionRequired),
() => Assert.IsNull(selector.GetSelection()),
() => tabControl.Items.Add(tabItem),
() => Assert.IsNotNull(selector.GetSelection())
);
EnqueueTestComplete();
}
/// <summary>Raises the <see cref="E:System.Windows.Controls.Primitives.Selector.SelectionChanged" /> routed event. </summary>
/// <param name="e">Provides data for <see cref="T:System.Windows.Controls.SelectionChangedEventArgs" />. </param>
// Token: 0x060056C2 RID: 22210 RVA: 0x0017FE90 File Offset: 0x0017E090
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
if (FrameworkAppContextSwitches.SelectionPropertiesCanLagBehindSelectionChangedEvent)
{
base.OnSelectionChanged(e);
if (base.IsKeyboardFocusWithin)
{
TabItem selectedTabItem = this.GetSelectedTabItem();
if (selectedTabItem != null)
{
selectedTabItem.SetFocus();
}
}
this.UpdateSelectedContent();
}
else
{
bool isKeyboardFocusWithin = base.IsKeyboardFocusWithin;
this.UpdateSelectedContent();
if (isKeyboardFocusWithin)
{
TabItem selectedTabItem2 = this.GetSelectedTabItem();
if (selectedTabItem2 != null)
{
selectedTabItem2.SetFocus();
}
}
base.OnSelectionChanged(e);
}
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionPatternOnInvalidated) || AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementSelected) || AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementAddedToSelection) || AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection))
{
TabControlAutomationPeer tabControlAutomationPeer = UIElementAutomationPeer.CreatePeerForElement(this) as TabControlAutomationPeer;
if (tabControlAutomationPeer != null)
{
tabControlAutomationPeer.RaiseSelectionEvents(e);
}
}
}
public TabItemExAutomationPeer(object owner, TabControlAutomationPeer tabControlAutomationPeer)
: base(owner, tabControlAutomationPeer)
{
}
