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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.Windows.Automation.Provider;
using System.Windows.Controls;
namespace System.Windows.Automation.Peers
{
/// <summary>
/// AutomationPeer associated with DocumentViewer
/// </summary>
public class DocumentViewerAutomationPeer : DocumentViewerBaseAutomationPeer
{
/// <summary>
/// Constructor
/// </summary>
/// <param name="owner">Owner of the AutomationPeer.</param>
public DocumentViewerAutomationPeer(DocumentViewer owner)
: base(owner)
{ }
/// <summary>
/// <see cref="AutomationPeer.GetClassNameCore"/>
/// </summary>
override protected string GetClassNameCore()
{
return "DocumentViewer";
}
/// <summary>
/// <see cref="AutomationPeer.GetPattern"/>
/// </summary>
override public object GetPattern(PatternInterface patternInterface)
{
object returnValue = null;
// Check if provided patternInterface is for Scroll, which is all
// that is currently exposed.
if (patternInterface == PatternInterface.Scroll)
{
// Get a reference to DocumentViewer's ScrollViewer
DocumentViewer owner = (DocumentViewer)Owner;
if (owner.ScrollViewer != null)
{
// Get a reference to ScrollViewer's AutomationPeer.
AutomationPeer scrollPeer = UIElementAutomationPeer.CreatePeerForElement(owner.ScrollViewer);
if (scrollPeer != null && scrollPeer is IScrollProvider)
{
scrollPeer.EventsSource = this;
returnValue = scrollPeer;
}
}
}
else
{
returnValue = base.GetPattern(patternInterface);
}
return returnValue;
}
}
}
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