FlowDocumentScrollViewerAutomationPeer.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Automation / Peers / FlowDocumentScrollViewerAutomationPeer.cs / 1 / FlowDocumentScrollViewerAutomationPeer.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: FlowDocumentScrollViewerAutomationPeer.cs 
//
// Description: AutomationPeer associated with FlowDocumentScrollViewer. 
// 
//---------------------------------------------------------------------------
 
using System.Collections.Generic;           // List
using System.Windows.Automation.Provider;   // IScrollProvider
using System.Windows.Controls;              // FlowDocumentScrollViewer
using System.Windows.Documents;             // FlowDocument 
using MS.Internal.Documents;                // IFlowDocumentViewer
 
 
namespace System.Windows.Automation.Peers
{ 
    /// 
    /// AutomationPeer associated with FlowDocumentScrollViewer.
    /// 
    public class FlowDocumentScrollViewerAutomationPeer : FrameworkElementAutomationPeer 
    {
        ///  
        /// Constructor. 
        /// 
        /// Owner of the AutomationPeer. 
        public FlowDocumentScrollViewerAutomationPeer(FlowDocumentScrollViewer owner)
            : base(owner)
        { }
 
        /// 
        ///  
        ///  
        public override object GetPattern(PatternInterface patternInterface)
        { 
            object returnValue = null;

            if (patternInterface == PatternInterface.Scroll)
            { 
                FlowDocumentScrollViewer owner = (FlowDocumentScrollViewer)Owner;
                if (owner.ScrollViewer != null) 
                { 
                    AutomationPeer scrollPeer = UIElementAutomationPeer.CreatePeerForElement(owner.ScrollViewer);
                    if (scrollPeer != null && scrollPeer is IScrollProvider) 
                    {
                        scrollPeer.EventsSource = this;
                        returnValue = scrollPeer;
                    } 
                }
            } 
            else if (patternInterface == PatternInterface.Text) 
            {
                // Make sure that Automation children are created. 
                this.GetChildren();

                // Re-expose TextPattern from hosted document.
                if (_documentPeer != null) 
                {
                    _documentPeer.EventsSource = this; 
                    returnValue = _documentPeer.GetPattern(patternInterface); 
                }
            } 

            return returnValue;
        }
 
        /// 
        ///  
        ///  
        /// 
        /// AutomationPeer associated with FlowDocumentScrollViewer returns an AutomationPeer 
        /// for hosted Document and for elements in the style.
        /// 
        protected override List GetChildrenCore()
        { 
            // Get children for all elements in the style.
            List children = base.GetChildrenCore(); 
 
            // If the owner is IFlowDocumentViewer, it means that it is embedded inside
            // FlowDocumentReaer. In this case DocumentAutumationPeer is already exposed. 
            // Hence there is no need to add it to children collection.
            if (!(Owner is IFlowDocumentViewer))
            {
                // Add AutomationPeer associated with the document. 
                // Make it the first child of the collection.
                FlowDocument document = ((FlowDocumentScrollViewer)Owner).Document; 
                if (document != null) 
                {
                    AutomationPeer documentPeer = ContentElementAutomationPeer.CreatePeerForElement(document); 
                    if (_documentPeer != documentPeer)
                    {
                        if (_documentPeer != null)
                        { 
                            _documentPeer.OnDisconnected();
                        } 
                        _documentPeer = documentPeer as DocumentAutomationPeer; 
                    }
                    if (documentPeer != null) 
                    {
                        if (children == null)
                        {
                            children = new List(); 
                        }
                        children.Add(documentPeer); 
                    } 
                }
            } 

            return children;
        }
 
        /// 
        ///  
        ///  
        protected override AutomationControlType GetAutomationControlTypeCore()
        { 
            return AutomationControlType.Document;
        }

        ///  
        /// 
        ///  
        protected override string GetClassNameCore() 
        {
            return "FlowDocumentScrollViewer"; 
        }

        private DocumentAutomationPeer _documentPeer;
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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