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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / UIAutomationClient / System / Windows / Automation / GridPattern.cs / 1305600 / GridPattern.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Client-side wrapper for Grid Pattern // // History: // 06/23/2003 : BrendanM Ported to WCP // //--------------------------------------------------------------------------- using System; using System.Windows.Automation.Provider; using MS.Internal.Automation; namespace System.Windows.Automation { ///#if (INTERNAL_COMPILE) internal class GridPattern: BasePattern #else public class GridPattern: BasePattern #endif { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors internal GridPattern(AutomationElement el, SafePatternHandle hPattern, bool cached) : base(el, hPattern) { _hPattern = hPattern; _cached = cached; } #endregion Constructors //------------------------------------------------------ // // Public Constants / Readonly Fields // //----------------------------------------------------- #region Public Constants and Readonly Fields /// Grid pattern public static readonly AutomationPattern Pattern = GridPatternIdentifiers.Pattern; ///RowCount public static readonly AutomationProperty RowCountProperty = GridPatternIdentifiers.RowCountProperty; ///ColumnCount public static readonly AutomationProperty ColumnCountProperty = GridPatternIdentifiers.ColumnCountProperty; #endregion Public Constants and Readonly Fields //------------------------------------------------------ // // Public Methods // //------------------------------------------------------ #region Public Methods ////// Obtain the AutomationElement at an zero based absolute position in the grid. /// Where 0,0 is top left /// /// Row of item to get /// Column of item to get /// ////// This API does not work inside the secure execution environment. /// public AutomationElement GetItem(int row, int column) { SafeNodeHandle hNode = UiaCoreApi.GridPattern_GetItem(_hPattern, row, column); return AutomationElement.Wrap(hNode); } #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. /// public GridPatternInformation Cached { get { Misc.ValidateCached(_cached); return new GridPatternInformation(_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. /// public GridPatternInformation Current { get { Misc.ValidateCurrent(_hPattern); return new GridPatternInformation(_el, false); } } #endregion Public Properties //----------------------------------------------------- // // Internal Methods // //----------------------------------------------------- #region Internal Methods internal static object Wrap(AutomationElement el, SafePatternHandle hPattern, bool cached) { return new GridPattern( el, hPattern, cached ); } #endregion Internal Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields internal SafePatternHandle _hPattern; internal bool _cached; // internal, since protected makes this publically visible #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 GridPatternInformation { //------------------------------------------------------ // // Constructors // //----------------------------------------------------- #region Constructors internal GridPatternInformation(AutomationElement el, bool useCache) { _el = el; _useCache = useCache; } #endregion Constructors //------------------------------------------------------ // // Public Properties // //----------------------------------------------------- #region Public Properties ////// 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); } } #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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