SelectionItemProviderWrapper.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 / Core / MS / Internal / Automation / SelectionItemProviderWrapper.cs / 1 / SelectionItemProviderWrapper.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Selection 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.Collections; 
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 SelectionItemProviderWrapper: MarshalByRefObject, ISelectionItemProvider
    { 
        //-----------------------------------------------------
        // 
        //  Constructors 
        //
        //----------------------------------------------------- 

        #region Constructors

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


        //------------------------------------------------------ 
        //
        //  Interface ISelectionItemProvider 
        // 
        //-----------------------------------------------------
 
        #region Interface ISelectionItemProvider

        public void Select()
        { 
            ElementUtil.Invoke( _peer, new DispatcherOperationCallback( Select ), null );
        } 
 
        public void AddToSelection()
        { 
            ElementUtil.Invoke( _peer, new DispatcherOperationCallback( AddToSelection ), null );
        }

        public void RemoveFromSelection() 
        {
            ElementUtil.Invoke( _peer, new DispatcherOperationCallback( RemoveFromSelection ), null ); 
        } 

        public bool IsSelected 
        {
            get
            {
                return (bool) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetIsSelected ), null ); 
            }
        } 
 
        public IRawElementProviderSimple SelectionContainer
        { 
            get
            {
                return (IRawElementProviderSimple) ElementUtil.Invoke( _peer, new DispatcherOperationCallback( GetSelectionContainer ), null );
            } 
        }
 
        #endregion Interface ISelectionItemProvider 

 
        //------------------------------------------------------
        //
        //  Internal Methods
        // 
        //------------------------------------------------------
 
        #region Internal Methods 

        internal static object Wrap( AutomationPeer peer, object iface ) 
        {
            return new SelectionItemProviderWrapper( peer, (ISelectionItemProvider) iface );
        }
 
        #endregion Internal Methods
 
        //----------------------------------------------------- 
        //
        //  Private Methods 
        //
        //------------------------------------------------------

        #region Private Methods 

        private object Select( object unused ) 
        { 
            _iface.Select();
            return null; 
        }

        private object AddToSelection( object unused )
        { 
            _iface.AddToSelection();
            return null; 
        } 

        private object RemoveFromSelection( object unused ) 
        {
            _iface.RemoveFromSelection();
            return null;
        } 

        private object GetIsSelected( object unused ) 
        { 
            return _iface.IsSelected;
        } 

        private object GetSelectionContainer( object unused )
        {
            return _iface.SelectionContainer; 
        }
 
        #endregion Private Methods 

 
        //-----------------------------------------------------
        //
        //  Private Fields
        // 
        //-----------------------------------------------------
 
        #region Private Fields 

        private AutomationPeer _peer; 
        private ISelectionItemProvider _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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