Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / Automation / GridItemProviderWrapper.cs / 1305600 / GridItemProviderWrapper.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Grid Item pattern provider wrapper for WCP // // History: // 07/21/2003 : BrendanM 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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