Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / AccessibleTech / longhorn / Automation / UIAutomationClient / System / Windows / Automation / SelectionItemPattern.cs / 1 / SelectionItemPattern.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Client-side wrapper for SelectionItem Pattern // // History: // 06/23/2003 : [....] Ported to WCP // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows.Automation.Provider; using MS.Internal.Automation; namespace System.Windows.Automation { ////// Class representing containers that manage selection. /// #if (INTERNAL_COMPILE) internal class SelectionItemPattern: BasePattern #else public class SelectionItemPattern: BasePattern #endif { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors private SelectionItemPattern(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 ///SelectionItem pattern public static readonly AutomationPattern Pattern = SelectionItemPatternIdentifiers.Pattern; ///Indicates the element is currently selected. public static readonly AutomationProperty IsSelectedProperty = SelectionItemPatternIdentifiers.IsSelectedProperty; ///Indicates the element is currently selected. public static readonly AutomationProperty SelectionContainerProperty = SelectionItemPatternIdentifiers.SelectionContainerProperty; ////// Event ID: ElementAddedToSelection - indicates an element was added to the selection. /// sourceElement refers to the element that was added to the selection. /// public static readonly AutomationEvent ElementAddedToSelectionEvent = SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent; ////// Event ID: ElementRemovedFromSelection - indicates an element was removed from the selection. /// sourceElement refers to the element that was removed from the selection. /// public static readonly AutomationEvent ElementRemovedFromSelectionEvent = SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent; ////// Event ID: ElementSelected - indicates an element was selected in a selection container, deselecting /// any previously selected elements in that container. /// sourceElement refers to the selected element /// public static readonly AutomationEvent ElementSelectedEvent = SelectionItemPatternIdentifiers.ElementSelectedEvent; #endregion Public Constants and Readonly Fields //------------------------------------------------------ // // Public Methods // //------------------------------------------------------ #region Public Methods ////// Sets the current element as the selection /// This clears the selection from other elements in the container /// /// ////// This API does not work inside the secure execution environment. /// public void Select() { UiaCoreApi.SelectionItemPattern_Select(_hPattern); } ////// /// Adds current element to selection /// /// ////// This API does not work inside the secure execution environment. /// public void AddToSelection() { UiaCoreApi.SelectionItemPattern_AddToSelection(_hPattern); } ////// /// Removes current element from selection /// /// ////// This API does not work inside the secure execution environment. /// public void RemoveFromSelection() { UiaCoreApi.SelectionItemPattern_RemoveFromSelection(_hPattern); } #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 SelectionItemPatternInformation Cached { get { Misc.ValidateCached(_cached); return new SelectionItemPatternInformation(_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 SelectionItemPatternInformation Current { get { Misc.ValidateCurrent(_hPattern); return new SelectionItemPatternInformation(_el, false); } } #endregion Public Properties //----------------------------------------------------- // // Internal Methods // //----------------------------------------------------- #region Internal Methods internal static object Wrap(AutomationElement el, SafePatternHandle hPattern, bool cached) { return new SelectionItemPattern(el, hPattern, cached); } #endregion Internal Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields private SafePatternHandle _hPattern; private bool _cached; #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 SelectionItemPatternInformation { //------------------------------------------------------ // // Constructors // //----------------------------------------------------- #region Constructors internal SelectionItemPatternInformation(AutomationElement el, bool useCache) { _el = el; _useCache = useCache; } #endregion Constructors //------------------------------------------------------ // // Public Properties // //----------------------------------------------------- #region Public Properties ////// Check whether an element is selected /// ///returns true if the element is selected /// ////// This API does not work inside the secure execution environment. /// public bool IsSelected { get { return (bool)_el.GetPatternPropertyValue(IsSelectedProperty, _useCache); } } ////// /// The logical element that supports the SelectionPattern for this Item /// ///returns an AutomationElement /// ////// This API does not work inside the secure execution environment. /// public AutomationElement SelectionContainer { get { return (AutomationElement)_el.GetPatternPropertyValue(SelectionContainerProperty, _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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