TablePattern.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / AccessibleTech / longhorn / Automation / UIAutomationClient / System / Windows / Automation / TablePattern.cs / 1 / TablePattern.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Client-side wrapper for Table Pattern 
//
// History: 
//  06/23/2003 : [....] Ported to WCP
//
//---------------------------------------------------------------------------
 
using System;
using System.Windows.Automation.Provider; 
using MS.Internal.Automation; 

namespace System.Windows.Automation 
{
    /// 
    /// Identifies a grid that has header information.
    ///  
#if (INTERNAL_COMPILE)
    internal class TablePattern: GridPattern 
#else 
    public class TablePattern: GridPattern
#endif 
    {
        //-----------------------------------------------------
        //
        //  Constructors 
        //
        //----------------------------------------------------- 
 
        #region Constructors
 
        private TablePattern(AutomationElement el, SafePatternHandle hPattern, bool cached)
            : base(el, hPattern, cached)
        {
            // Done 
        }
 
        #endregion Constructors 

 
        //------------------------------------------------------
        //
        //  Public Constants / Readonly Fields
        // 
        //-----------------------------------------------------
 
        #region Public Constants and Readonly Fields 

        /// Table pattern 
        public static readonly new AutomationPattern Pattern = TablePatternIdentifiers.Pattern;

        /// Property ID: RowHeaders - Collection of all row headers for this table
        public static readonly AutomationProperty RowHeadersProperty = TablePatternIdentifiers.RowHeadersProperty; 

        /// Property ID: ColumnHeaders - Collection of all column headers for this table 
        public static readonly AutomationProperty ColumnHeadersProperty = TablePatternIdentifiers.ColumnHeadersProperty; 

        /// Property ID: RowOrColumnMajor - Indicates if the data is best presented by row or column 
        public static readonly AutomationProperty RowOrColumnMajorProperty = TablePatternIdentifiers.RowOrColumnMajorProperty;

        #endregion Public Constants and Readonly Fields
 

        //------------------------------------------------------ 
        // 
        //  Public Properties
        // 
        //------------------------------------------------------

        #region Public Properties
 
        /// 
        /// This member allows access to previously requested 
        /// cached properties for this element. The returned object 
        /// has accessors for each property defined for this pattern.
        ///  
        /// 
        /// Cached property values must have been previously requested
        /// using a CacheRequest. If you try to access a cached
        /// property that was not previously requested, an InvalidOperation 
        /// Exception will be thrown.
        /// 
        /// To get the value of a property at the current point in time, 
        /// access the property via the Current accessor instead of
        /// Cached. 
        /// 
        new public TablePatternInformation Cached
        {
            get 
            {
                Misc.ValidateCached(_cached); 
                return new TablePatternInformation(_el, true); 
            }
        } 

        /// 
        /// This member allows access to current property values
        /// for this element. The returned object has accessors for 
        /// each property defined for this pattern.
        ///  
        ///  
        /// This pattern must be from an AutomationElement with a
        /// Full reference in order to get current values. If the 
        /// AutomationElement was obtained using AutomationElementMode.None,
        /// then it contains only cached data, and attempting to get
        /// the current value of any property will throw an InvalidOperationException.
        /// 
        /// To get the cached value of a property that was previously
        /// specified using a CacheRequest, access the property via the 
        /// Cached accessor instead of Current. 
        /// 
        new public TablePatternInformation Current 
        {
            get
            {
                Misc.ValidateCurrent(_hPattern); 
                return new TablePatternInformation(_el, false);
            } 
        } 

        #endregion Public Properties 


        //-----------------------------------------------------
        // 
        //  Internal Methods
        // 
        //------------------------------------------------------ 

        #region Internal Methods 

        internal static new object Wrap(AutomationElement el, SafePatternHandle hPattern, bool cached)
        {
            return new TablePattern(el, hPattern, cached); 
        }
 
        #endregion Internal Methods 

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

        // No new fields needed here - we use those inherited from base class 

        #endregion Private Fields

 
        //-----------------------------------------------------
        // 
        //  Nested Classes 
        //
        //------------------------------------------------------ 

        #region Nested Classes

        ///  
        /// This class provides access to either Cached or Current
        /// properties on a pattern via the pattern's .Cached or 
        /// .Current accessors. 
        /// 
        public struct TablePatternInformation 
        {
            //-----------------------------------------------------
            //
            //  Constructors 
            //
            //------------------------------------------------------ 
 
            #region Constructors
 
            internal TablePatternInformation(AutomationElement el, bool useCache)
            {
                _el = el;
                _useCache = useCache; 
            }
 
            #endregion Constructors 

 
            //------------------------------------------------------
            //
            //  Public Properties
            // 
            //-----------------------------------------------------
 
            #region Public Properties 

            /// Collection of all row headers for this table 
            ///
            /// 
            /// This API does not work inside the secure execution environment.
            ///  
            /// 
            public AutomationElement[] GetRowHeaders() 
            { 
                return (AutomationElement[])_el.GetPatternPropertyValue(RowHeadersProperty, _useCache);
            } 

            /// Collection of all column headers for this table
            ///
            ///  
            /// This API does not work inside the secure execution environment.
            ///  
            ///  
            public AutomationElement[] GetColumnHeaders()
            { 
                return (AutomationElement[])_el.GetPatternPropertyValue(ColumnHeadersProperty, _useCache);
            }

            ///  
            /// number of rows in the grid
            ///  
            /// 
            /// 
            /// This API does not work inside the secure execution environment. 
            /// 
            /// 
            public int RowCount
            { 
                get
                { 
                    return (int)_el.GetPatternPropertyValue(RowCountProperty, _useCache); 
                }
            } 

            /// 
            /// number of columns in the grid
            ///  
            ///
            ///  
            /// This API does not work inside the secure execution environment. 
            /// 
            ///  
            public int ColumnCount
            {
                get
                { 
                    return (int)_el.GetPatternPropertyValue(ColumnCountProperty, _useCache);
                } 
            } 

            /// Indicates if the data is best presented by row or column 
            ///
            /// 
            /// This API does not work inside the secure execution environment.
            ///  
            /// 
            public RowOrColumnMajor RowOrColumnMajor 
            { 
                get
                { 
                    return (RowOrColumnMajor)_el.GetPatternPropertyValue(RowOrColumnMajorProperty, _useCache);
                }
            }
 
            #endregion Public Properties
 
            //------------------------------------------------------ 
            //
            //  Private Fields 
            //
            //-----------------------------------------------------

            #region Private Fields 

            private AutomationElement _el; // AutomationElement that contains the cache or live reference 
            private bool _useCache; // true to use cache, false to use live reference to get current values 

            #endregion Private Fields 
        }
        #endregion Nested Classes
    }
} 

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