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using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Windows;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Interop;
using System.Windows.Media;
using MS.Internal;
using MS.Win32;
namespace System.Windows.Automation.Peers
{
///
public class TabItemAutomationPeer : SelectorItemAutomationPeer, ISelectionItemProvider
{
///
public TabItemAutomationPeer(object owner, TabControlAutomationPeer tabControlAutomationPeer)
: base(owner, tabControlAutomationPeer)
{}
///
override protected string GetClassNameCore()
{
return "TabItem";
}
///
override protected AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.TabItem;
}
// Return the base without the AccessKey character
///
override protected string GetNameCore()
{
string result = base.GetNameCore();
if (!string.IsNullOrEmpty(result))
{
TabItem tabItem = GetWrapper() as TabItem;
if ((tabItem != null) && (tabItem.Header is string))
{
return AccessText.RemoveAccessKeyMarker(result);
}
}
return result;
}
// Selected TabItem content is located under the TabControl style visual tree
///
protected override List<AutomationPeer> GetChildrenCore()
{
// Call the base in case we have children in the header
List<AutomationPeer> headerChildren = base.GetChildrenCore();
// Only if the TabItem is selected we need to add its visual children
TabItem tabItem = GetWrapper() as TabItem;
if (tabItem != null && tabItem.IsSelected)
{
TabControl parentTabControl = ItemsControlAutomationPeer.Owner as TabControl;
if (parentTabControl != null)
{
ContentPresenter contentHost = parentTabControl.SelectedContentPresenter;
if (contentHost != null)
{
AutomationPeer contentHostPeer = new FrameworkElementAutomationPeer(contentHost);
List<AutomationPeer> contentChildren = contentHostPeer.GetChildren();
if (contentChildren != null)
{
if (headerChildren == null)
headerChildren = contentChildren;
else
headerChildren.AddRange(contentChildren);
}
}
}
}
return headerChildren;
}
void ISelectionItemProvider.RemoveFromSelection()
{
if (!IsEnabled())
throw new ElementNotEnabledException();
TabItem tabItem = GetWrapper() as TabItem;
if ((tabItem != null) && tabItem.IsSelected)
{
throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed));
}
}
/// Realization for TabItem is tied to selection, bringing item into view for realizing the element
/// as done for controls like ListBox doesn't make sense for TabControl.
internal override void RealizeCore()
{
ISelectionItemProvider selectionItemProvider = this as ISelectionItemProvider;
Selector parentSelector = (Selector)(ItemsControlAutomationPeer.Owner);
if (parentSelector != null && selectionItemProvider != null)
{
if (parentSelector.CanSelectMultiple)
selectionItemProvider.AddToSelection();
else
selectionItemProvider.Select();
}
}
}
}
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