DocumentViewerBaseAutomationPeer.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

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

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: DocumentViewerBaseAutomationPeer.cs 
//
// Description: AutomationPeer associated with DocumentViewerBase. 
// 
//---------------------------------------------------------------------------
 
using System.Collections.Generic;           // List
using System.Windows.Controls.Primitives;   // DocumentViewerBase
using System.Windows.Documents;             // IDocumentPaginatorSource
 
namespace System.Windows.Automation.Peers
{ 
    ///  
    /// AutomationPeer associated with DocumentViewerBase.
    ///  
    public class DocumentViewerBaseAutomationPeer : FrameworkElementAutomationPeer
    {
        /// 
        /// Constructor. 
        /// 
        /// Owner of the AutomationPeer. 
        public DocumentViewerBaseAutomationPeer(DocumentViewerBase owner) 
            : base(owner)
        { } 

        /// 
        /// 
        ///  
        public override object GetPattern(PatternInterface patternInterface)
        { 
            object returnValue = null; 

            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 DocumentViewerBase 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();
 
            // Add AutomationPeer associated with the document.
            // Make it the first child of the collection.
            AutomationPeer documentPeer = GetDocumentAutomationPeer();
            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 "DocumentViewer";
        }

        ///  
        /// Retrieves AutomationPeer for the document.
        ///  
        ///  
        private AutomationPeer GetDocumentAutomationPeer()
        { 
            AutomationPeer documentPeer = null;
            IDocumentPaginatorSource document = ((DocumentViewerBase)Owner).Document;
            if (document != null)
            { 
                if (document is UIElement)
                { 
                    documentPeer = UIElementAutomationPeer.CreatePeerForElement((UIElement)document); 
                }
                else if (document is ContentElement) 
                {
                    documentPeer = ContentElementAutomationPeer.CreatePeerForElement((ContentElement)document);
                }
            } 
            return documentPeer;
        } 
 
        private DocumentAutomationPeer _documentPeer;
    } 
}


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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK