MultipleViewPattern.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 / MultipleViewPattern.cs / 1 / MultipleViewPattern.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Client-side wrapper for MultipleView Pattern 
//
// History: 
//  06/23/2003 : [....] Ported to WCP
//
//---------------------------------------------------------------------------
 
using System;
using System.Windows.Automation.Provider; 
using MS.Internal.Automation; 

namespace System.Windows.Automation 
{

    ///wrapper class for MultipleView pattern 
#if (INTERNAL_COMPILE) 
    internal class MultipleViewPattern: BasePattern
#else 
    public class MultipleViewPattern: BasePattern 
#endif
    { 
        //-----------------------------------------------------
        //
        //  Constructors
        // 
        //-----------------------------------------------------
 
        #region Constructors 

        private MultipleViewPattern(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 

        /// MultipleView pattern 
        public static readonly AutomationPattern Pattern = MultipleViewPatternIdentifiers.Pattern;

        /// Property ID: CurrentView - The view ID corresponding to the control's current state. This ID is control-specific.
        public static readonly AutomationProperty CurrentViewProperty = MultipleViewPatternIdentifiers.CurrentViewProperty; 

        /// Property ID: SupportedViews - Returns an array of ints representing the full set of views available in this control. 
        public static readonly AutomationProperty SupportedViewsProperty = MultipleViewPatternIdentifiers.SupportedViewsProperty; 

        #endregion Public Constants and Readonly Fields 


        //------------------------------------------------------
        // 
        //  Public Methods
        // 
        //------------------------------------------------------ 

        #region Public Methods 

        /// 
        /// The string view name string must be suitable for use by TTS, Braille, etc.
        ///  
        /// 
        /// The view ID corresponding to the control's current state. This ID is control-specific and can should 
        /// be the same across instances. 
        /// 
        /// Return a localized, human readable string in the application's current UI language. 
        ///
        /// 
        /// This API does not work inside the secure execution environment.
        ///  
        /// 
        public string GetViewName( int viewId ) 
        { 
            return UiaCoreApi.MultipleViewPattern_GetViewName(_hPattern, viewId);
        } 

        /// 
        /// Change the current view using an ID returned from GetSupportedViews()
        ///  
        ///
        ///  
        /// This API does not work inside the secure execution environment. 
        /// 
        ///  
        public void SetCurrentView( int viewId )
        {
            UiaCoreApi.MultipleViewPattern_SetCurrentView(_hPattern, viewId);
        } 
        #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 MultipleViewPatternInformation Cached
        { 
            get
            { 
                Misc.ValidateCached(_cached); 
                return new MultipleViewPatternInformation(_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 MultipleViewPatternInformation Current
        {
            get
            { 
                Misc.ValidateCurrent(_hPattern);
                return new MultipleViewPatternInformation(_el, false); 
            } 
        }
 
        #endregion Public Properties


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

        internal static object Wrap(AutomationElement el, SafePatternHandle hPattern, bool cached)
        { 
            return new MultipleViewPattern(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 MultipleViewPatternInformation
        {
            //------------------------------------------------------ 
            //
            //  Constructors 
            // 
            //-----------------------------------------------------
 
            #region Constructors

            internal MultipleViewPatternInformation(AutomationElement el, bool useCache)
            { 
                _el = el;
                _useCache = useCache; 
            } 

            #endregion Constructors 


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

            #region Public Properties 

            /// The view ID corresponding to the control's current state. This ID is control-specific
            ///
            ///  
            /// This API does not work inside the secure execution environment.
            ///  
            ///  
            public int CurrentView
            { 
                get
                {
                    return (int)_el.GetPatternPropertyValue(CurrentViewProperty, _useCache);
                } 
            }
 
            /// Returns an array of ints representing the full set of views available in this control. 
            ///
            ///  
            /// This API does not work inside the secure execution environment.
            /// 
            /// 
            public int [] GetSupportedViews() 
            {
                return (int [])_el.GetPatternPropertyValue(SupportedViewsProperty, _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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