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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using MS.Internal;
namespace System.Windows.Automation.Peers
{
/// <summary>
/// AutomationPeer for DataGridRow
/// </summary>
public sealed class DataGridRowAutomationPeer : FrameworkElementAutomationPeer
{
#region Constructors
/// <summary>
/// AutomationPeer for DataGridRow
/// </summary>
/// <param name="owner">DataGridRow</param>
public DataGridRowAutomationPeer(DataGridRow owner)
: base(owner)
{
ArgumentNullException.ThrowIfNull(owner);
}
#endregion
#region AutomationPeer Overrides
/// <summary>
/// Gets the control type for the element that is associated with the UI Automation peer.
/// </summary>
/// <returns>The control type.</returns>
protected override AutomationControlType GetAutomationControlTypeCore()
{
return AutomationControlType.DataItem;
}
/// <summary>
/// Called by GetClassName that gets a human readable name that, in addition to AutomationControlType,
/// differentiates the control represented by this AutomationPeer.
/// </summary>
/// <returns>The string that contains the name.</returns>
protected override string GetClassNameCore()
{
return Owner.GetType().Name;
}
///
protected override List<AutomationPeer> GetChildrenCore()
{
// see whether the DataGridRow uses the standard control template
DataGridCellsPresenter cellsPresenter = OwningDataGridRow.CellsPresenter;
if (cellsPresenter != null && cellsPresenter.ItemsHost != null)
{
// this is the normal case
List<AutomationPeer> children = new List<AutomationPeer>(3);
// Step 1: Add row header if exists
AutomationPeer dataGridRowHeaderAutomationPeer = RowHeaderAutomationPeer;
if (dataGridRowHeaderAutomationPeer != null)
{
children.Add(dataGridRowHeaderAutomationPeer);
}
// Step 2: Add all cells
DataGridItemAutomationPeer itemPeer = this.EventsSource as DataGridItemAutomationPeer;
if (itemPeer != null)
{
children.AddRange(itemPeer.GetCellItemPeers());
}
// Step 3: Add DetailsPresenter last if exists
AutomationPeer dataGridDetailsPresenterAutomationPeer = DetailsPresenterAutomationPeer;
if (dataGridDetailsPresenterAutomationPeer != null)
{
children.Add(dataGridDetailsPresenterAutomationPeer);
}
return children;
}
else
{
// in the unusual case where the app uses a non-standard control template
// for the DataGridRow, fall back to the base implementation
return base.GetChildrenCore();
}
}
#endregion
#region Private helpers
internal AutomationPeer RowHeaderAutomationPeer
{
get
{
DataGridRowHeader dataGridRowHeader = OwningDataGridRow.RowHeader;
if (dataGridRowHeader != null)
{
return CreatePeerForElement(dataGridRowHeader);
}
return null;
}
}
private AutomationPeer DetailsPresenterAutomationPeer
{
get
{
DataGridDetailsPresenter dataGridDetailsPresenter = OwningDataGridRow.DetailsPresenter;
if (dataGridDetailsPresenter != null)
{
return CreatePeerForElement(dataGridDetailsPresenter);
}
return null;
}
}
private DataGridRow OwningDataGridRow
{
get
{
return (DataGridRow)Owner;
}
}
#endregion
}
}
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