GridItemProviderWrapper.cs source code in C# .NET

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                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / MS / Internal / Automation / GridItemProviderWrapper.cs / 1 / GridItemProviderWrapper.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Grid Item pattern provider wrapper for WCP 
//
// History: 
//  07/21/2003 : [....] Ported to WCP
//
//---------------------------------------------------------------------------
 
using System;
using System.Windows.Threading; 
 
using System.Windows.Media;
using System.Windows.Automation; 
using System.Windows.Automation.Provider;
using System.Windows.Automation.Peers;

namespace MS.Internal.Automation 
{
    // Automation/WCP Wrapper class: Implements that UIAutomation I...Provider 
    // interface, and calls through to a WCP AutomationPeer which implements the corresponding 
    // I...Provider inteface. Marshalls the call from the RPC thread onto the
    // target AutomationPeer's context. 
    //
    // Class has two major parts to it:
    // * Implementation of the I...Provider, which uses Dispatcher.Invoke
    //   to call a private method (lives in second half of the class) via a delegate, 
    //   if necessary, packages any params into an object param. Return type of Invoke
    //   must be cast from object to appropriate type. 
    // * private methods - one for each interface entry point - which get called back 
    //   on the right context. These call through to the peer that's actually
    //   implenting the I...Provider version of the interface. 
    internal class GridItemProviderWrapper: MarshalByRefObject, IGridItemProvider
    {
        //-----------------------------------------------------
        // 
        //  Constructors
        // 
        //----------------------------------------------------- 

        #region Constructors 

        private GridItemProviderWrapper( AutomationPeer peer, IGridItemProvider iface )
        {
            _peer = peer; 
            _iface = iface;
        } 
 
        #endregion Constructors
 

        //------------------------------------------------------
        //
        //  Interface IGridItemProvider 
        //
        //----------------------------------------------------- 
 
        #region Interface IGridItemProvider
 
        public int Row
        {
            get
            { 
                return (int) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetRow ), null );
            } 
        } 

        public int Column 
        {
            get
            {
                return (int) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetColumn ), null ); 
            }
        } 
 
        public int RowSpan
        { 
            get
            {
                return (int) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetRowSpan ), null );
            } 
        }
 
        public int ColumnSpan 
        {
            get 
            {
                return (int) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetColumnSpan ), null );
            }
        } 

        public IRawElementProviderSimple ContainingGrid 
        { 
            get
            { 
                return (IRawElementProviderSimple) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetContainingGrid ), null );
            }
        }
 
        #endregion Interface IGridItemProvider
 
 
        //------------------------------------------------------
        // 
        //  Internal Methods
        //
        //------------------------------------------------------
 
        #region Internal Methods
 
        internal static object Wrap( AutomationPeer peer, object iface ) 
        {
            return new GridItemProviderWrapper( peer, (IGridItemProvider) iface ); 
        }

        #endregion Internal Methods
 
        //-----------------------------------------------------
        // 
        //  Private Methods 
        //
        //------------------------------------------------------ 

        #region Private Methods

        private object GetRow( object unused ) 
        {
            return _iface.Row; 
        } 

        private object GetColumn( object unused ) 
        {
            return _iface.Column;
        }
 
        private object GetRowSpan( object unused )
        { 
            return _iface.RowSpan; 
        }
 
        private object GetColumnSpan( object unused )
        {
            return _iface.ColumnSpan;
        } 

        private object GetContainingGrid( object unused ) 
        { 
            return _iface.ContainingGrid;
        } 

        #endregion Private Methods

 
        //-----------------------------------------------------
        // 
        //  Private Fields 
        //
        //----------------------------------------------------- 

        #region Private Fields

        private AutomationPeer _peer; 
        private IGridItemProvider _iface;
 
        #endregion Private Fields 
    }
 
}

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