GridViewCellAutomationPeer.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Automation / Peers / GridViewCellAutomationPeer.cs / 1 / GridViewCellAutomationPeer.cs
                        
                        
                            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 GridViewCellAutomationPeer : FrameworkElementAutomationPeer, ITableItemProvider
    { 
        ///
        internal GridViewCellAutomationPeer(ContentPresenter owner, ListViewAutomationPeer parent) 
            : base(owner) 
        {
            Invariant.Assert(parent != null); 
            _listviewAP = parent;
        }

        /// 
        internal GridViewCellAutomationPeer(TextBlock owner, ListViewAutomationPeer parent)
            : base(owner) 
        { 
            Invariant.Assert(parent != null);
            _listviewAP = parent; 
        }

        ///
        protected override string GetClassNameCore() 
        {
            return Owner.GetType().Name; 
        } 

        /// 
        override protected AutomationControlType GetAutomationControlTypeCore()
        {
            if (Owner is TextBlock)
            { 
                return AutomationControlType.Text;
            } 
            else 
            {
                return AutomationControlType.Custom; 
            }
        }

        /// 
        override public object GetPattern(PatternInterface patternInterface)
        { 
            if (patternInterface == PatternInterface.GridItem || patternInterface == PatternInterface.TableItem) 
            {
                return this; 
            }

            return base.GetPattern(patternInterface);
        } 

        /// 
        protected override bool IsControlElementCore() 
        {
            if (Owner is TextBlock) 
            {
                return true;
            }
            else 
            {
                List children = GetChildrenAutomationPeer(Owner); 
                return children != null && children.Count >= 1; 
            }
        } 

        internal int Column
        {
            get { return _column; } 
            set { _column = value; }
        } 
 
        internal int Row
        { 
            get { return _row; }
            set { _row = value; }
        }
 
        #region ITableItem
 
        IRawElementProviderSimple[] ITableItemProvider.GetRowHeaderItems() 
        {
            //If there are no row headers, return an empty array 
            return new IRawElementProviderSimple[0];
        }

        IRawElementProviderSimple[] ITableItemProvider.GetColumnHeaderItems() 
        {
            ListView listview = _listviewAP.Owner as ListView; 
            if (listview != null && listview.View is GridView) 
            {
                GridView gridview = listview.View as GridView; 
                if (gridview.HeaderRowPresenter != null && gridview.HeaderRowPresenter.ActualColumnHeaders.Count > Column)
                {
                    GridViewColumnHeader header = gridview.HeaderRowPresenter.ActualColumnHeaders[Column];
                    AutomationPeer peer = UIElementAutomationPeer.FromElement(header); 
                    if (peer != null)
                    { 
                        return new IRawElementProviderSimple[] { ProviderFromPeer(peer) }; 
                    }
                } 
            }
            return new IRawElementProviderSimple[0];
        }
 
        #endregion
 
        #region IGridItem 

        int IGridItemProvider.Row { get { return Row; } } 
        int IGridItemProvider.Column { get { return Column; } }
        int IGridItemProvider.RowSpan { get { return 1; } }
        int IGridItemProvider.ColumnSpan { get { return 1; } }
        IRawElementProviderSimple IGridItemProvider.ContainingGrid { get { return ProviderFromPeer(_listviewAP); } } 

        #endregion 
 

        #region Private Methods 

        /// 
        /// Get the children of the parent which has automation peer
        ///  
        private List GetChildrenAutomationPeer(Visual parent)
        { 
            Invariant.Assert(parent != null); 

            List children = null; 

            iterate(parent,
                    (IteratorCallback)delegate(AutomationPeer peer)
                    { 
                        if (children == null)
                            children = new List(); 
 
                        children.Add(peer);
                        return (false); 
                    });

            return children;
        } 

        private delegate bool IteratorCallback(AutomationPeer peer); 
 
        //
        private static bool iterate(Visual parent, IteratorCallback callback) 
        {
            bool done = false;

            AutomationPeer peer = null; 

            int count = parent.InternalVisualChildrenCount; 
            for (int i = 0; i < count && !done; i++) 
            {
                Visual child = parent.InternalGetVisualChild(i); 
                if (child != null
                    && child.CheckFlagsAnd(VisualFlags.IsUIElement)
                    && (peer = CreatePeerForElement((UIElement)child)) != null)
                { 
                    done = callback(peer);
                } 
                else 
                {
                    done = iterate(child, callback); 
                }
            }

            return (done); 
        }
 
        #endregion 

        #region Private Fields 

        private ListViewAutomationPeer _listviewAP;
        private int _column;
        private int _row; 

        #endregion 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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GridViewCellAutomationPeer.cs source code in C# .NET

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