TableItemPattern.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / UIAutomationClient / System / Windows / Automation / TableItemPattern.cs / 1305600 / TableItemPattern.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Client-side wrapper for TableItem Pattern 
//
// History: 
//  06/23/2003 : BrendanM Ported to WCP
//
//---------------------------------------------------------------------------
 

using System; 
using System.Windows.Automation.Provider; 
using MS.Internal.Automation;
 
namespace System.Windows.Automation
{
    /// 
    /// Used to expose grid items with header information. 
    /// 
#if (INTERNAL_COMPILE) 
    internal class TableItemPattern: GridItemPattern 
#else
    public class TableItemPattern: GridItemPattern 
#endif
    {
        //-----------------------------------------------------
        // 
        //  Constructors
        // 
        //----------------------------------------------------- 

        #region Constructors 

        private TableItemPattern(AutomationElement el, SafePatternHandle hPattern, bool cached)
            : base(el, hPattern, cached)
        { 
            _hPattern = hPattern;
        } 
 
        #endregion Constructors
 

        //------------------------------------------------------
        //
        //  Public Constants / Readonly Fields 
        //
        //----------------------------------------------------- 
 
        #region Public Constants and Readonly Fields
 
        /// TableItem pattern
        public static readonly new AutomationPattern Pattern = TableItemPatternIdentifiers.Pattern;

        /// Property ID: RowHeaderItems - Collection of all row headers for this cell 
        public static readonly AutomationProperty RowHeaderItemsProperty = TableItemPatternIdentifiers.RowHeaderItemsProperty;
 
        /// Property ID: ColumnHeaderItems - Collection of all column headers for this cell 
        public static readonly AutomationProperty ColumnHeaderItemsProperty = TableItemPatternIdentifiers.ColumnHeaderItemsProperty;
 
        #endregion Public Constants and Readonly Fields


        //------------------------------------------------------ 
        //
        //  Public Methods 
        // 
        //------------------------------------------------------
 
        #region Public Methods


        #endregion Public Methods 

 
        //----------------------------------------------------- 
        //
        //  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 TableItemPatternInformation Cached
        { 
            get
            { 
                Misc.ValidateCached(_cached); 
                return new TableItemPatternInformation(_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 TableItemPatternInformation Current
        {
            get
            { 
                Misc.ValidateCurrent(_hPattern);
                return new TableItemPatternInformation(_el, false); 
            } 
        }
 
        #endregion Public Properties


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

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

        //-----------------------------------------------------
        //
        //  Private Fields 
        //
        //------------------------------------------------------ 
 
        #region Private Fields
 
        private SafePatternHandle _hPattern;

        #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 TableItemPatternInformation
        {
            //------------------------------------------------------
            // 
            //  Constructors
            // 
            //----------------------------------------------------- 

            #region Constructors 

            internal TableItemPatternInformation(AutomationElement el, bool useCache)
            {
                _el = el; 
                _useCache = useCache;
            } 
 
            #endregion Constructors
 

            //------------------------------------------------------
            //
            //  Public Properties 
            //
            //----------------------------------------------------- 
 
            #region Public Properties
 
            /// 
            /// the row number of the element.  This is zero based.
            /// 
            /// 
            /// 
            /// This API does not work inside the secure execution environment. 
            ///  
            /// 
            public int Row 
            {
                get
                {
                    return (int)_el.GetPatternPropertyValue(RowProperty, _useCache); 
                }
            } 
 
            /// 
            /// the column number of the element.  This is zero based. 
            /// 
            ///
            /// 
            /// This API does not work inside the secure execution environment. 
            /// 
            ///  
            public int Column 
            {
                get 
                {
                    return (int)_el.GetPatternPropertyValue(ColumnProperty, _useCache);
                }
            } 

            ///  
            /// count of how many rows the element spans 
            /// -- non merged cells should always return 1
            ///  
            ///
            /// 
            /// This API does not work inside the secure execution environment.
            ///  
            /// 
            public int RowSpan 
            { 
                get
                { 
                    return (int)_el.GetPatternPropertyValue(RowSpanProperty, _useCache);
                }
            }
 
            /// 
            /// count of how many columns the element spans 
            /// -- non merged cells should always return 1 
            ///
            /// 
            /// 
            /// This API does not work inside the secure execution environment.
            /// 
            ///  
            public int ColumnSpan
            { 
                get 
                {
                    return (int)_el.GetPatternPropertyValue(ColumnSpanProperty, _useCache); 
                }
            }

            ///  
            /// The logical element that supports the GripPattern for this Item
            /// 
            /// 
            /// 
            /// This API does not work inside the secure execution environment. 
            /// 
            /// 
            public AutomationElement ContainingGrid
            { 
                get
                { 
                    return (AutomationElement)_el.GetPatternPropertyValue(ContainingGridProperty, _useCache); 
                }
            } 

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

            /// Collection of all column headers for this cell 
            ///
            ///  
            /// This API does not work inside the secure execution environment. 
            /// 
            ///  
            public AutomationElement[] GetColumnHeaderItems()
            {
                return (AutomationElement[])_el.GetPatternPropertyValue(ColumnHeaderItemsProperty, _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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TableItemPattern.cs source code in C# .NET

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