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using System;
using System.Collections;
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 StatusBarAutomationPeer : FrameworkElementAutomationPeer
{
///
public StatusBarAutomationPeer(StatusBar owner): base(owner)
{}
///
protected override string GetClassNameCore()
{
return "StatusBar";
}
///
protected override AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.StatusBar;
}
///
protected override List<AutomationPeer> GetChildrenCore()
{
List<AutomationPeer> list = new List<AutomationPeer>();
ItemsControl itemscontrol = Owner as ItemsControl;
if (itemscontrol != null)
{
foreach (object obj in itemscontrol.Items)
{
if (obj is Separator)
{
Separator separator = obj as Separator;
list.Add(UIElementAutomationPeer.CreatePeerForElement(separator));
}
else
{
StatusBarItem item = itemscontrol.ItemContainerGenerator.ContainerFromItem(obj) as StatusBarItem;
if (item != null)
{
//If the item is a string or TextBlock or StatusBarItem
//StatusBarItemAutomationPeer will be created to show the text
//Or we'll use the control's automation peer
if (obj is string || obj is TextBlock
|| (obj is StatusBarItem && ((StatusBarItem)obj).Content is string))
{
list.Add(UIElementAutomationPeer.CreatePeerForElement(item));
}
else
{
List<AutomationPeer> childList = GetChildrenAutomationPeer(item);
if (childList != null)
{
foreach (AutomationPeer ap in childList)
{
list.Add(ap);
}
}
}
}
}
}
}
return list;
}
/// <summary>
/// Get the children of the parent which has automation peer
/// </summary>
private List<AutomationPeer> GetChildrenAutomationPeer(Visual parent)
{
Invariant.Assert(parent != null);
List<AutomationPeer> children = null;
iterate(parent,
(IteratorCallback)delegate(AutomationPeer peer)
{
if (children == null)
children = new List<AutomationPeer>();
children.Add(peer);
return (false);
});
return children;
}
private delegate bool IteratorCallback(AutomationPeer peer);
//
private static bool iterate(Visual parent, IteratorCallback callback)
{
bool done = false;
AutomationPeer peer = null;
int count = parent.InternalVisualChildrenCount;
for (int i = 0; i < count && !done; i++)
{
Visual child = parent.InternalGetVisualChild(i);
if (child != null
&& child.CheckFlagsAnd(VisualFlags.IsUIElement)
&& (peer = CreatePeerForElement((UIElement)child)) != null)
{
done = callback(peer);
}
else
{
done = iterate(child, callback);
}
}
return (done);
}
}
}
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