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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;
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 GridViewItemAutomationPeer : ListBoxItemAutomationPeer
{
///
public GridViewItemAutomationPeer(object owner, ListViewAutomationPeer listviewAP)
: base(owner, listviewAP)
{
Invariant.Assert(listviewAP != null);
_listviewAP = listviewAP;
}
///
override protected string GetClassNameCore()
{
return "ListViewItem";
}
///
override protected AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.DataItem;
}
///
protected override List<AutomationPeer> GetChildrenCore()
{
ListView listview = _listviewAP.Owner as ListView;
Invariant.Assert(listview != null);
object item = Item;
ListViewItem lvi = listview.ItemContainerGenerator.ContainerFromItem(item) as ListViewItem;
if (lvi != null)
{
GridViewRowPresenter rowPresenter = GridViewAutomationPeer.FindVisualByType(lvi, typeof(GridViewRowPresenter)) as GridViewRowPresenter;
if (rowPresenter != null)
{
Hashtable oldChildren = _dataChildren; //cache the old ones for possible reuse
_dataChildren = new Hashtable(rowPresenter.ActualCells.Count);
List<AutomationPeer> list = new List<AutomationPeer>();
int row = listview.Items.IndexOf(item);
int column = 0;
foreach (UIElement ele in rowPresenter.ActualCells)
{
GridViewCellAutomationPeer peer = (oldChildren == null ? null : (GridViewCellAutomationPeer)oldChildren[ele]);
if (peer == null)
{
if (ele is ContentPresenter)
{
peer = new GridViewCellAutomationPeer((ContentPresenter)ele, _listviewAP);
}
else if (ele is TextBlock)
{
peer = new GridViewCellAutomationPeer((TextBlock)ele, _listviewAP);
}
else
{
Invariant.Assert(false, "Children of GridViewRowPresenter should be ContentPresenter or TextBlock");
}
}
//protection from indistinguishable UIElement - for example, 2 UIElement wiht same value
if (_dataChildren[ele] == null)
{
//Set Cell's row and column
peer.Column = column;
peer.Row = row;
list.Add(peer);
_dataChildren.Add(ele, peer);
column++;
}
}
return list;
}
}
return null;
}
#region Private Fields
private ListViewAutomationPeer _listviewAP;
private Hashtable _dataChildren = null;
#endregion
}
}
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