RadioButtonAutomationPeer.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Automation / Peers / RadioButtonAutomationPeer.cs / 1 / RadioButtonAutomationPeer.cs
                        

                        
                            using System; 
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Windows; 
using System.Windows.Automation.Provider;
using System.Windows.Controls; 
using System.Windows.Interop; 
using System.Windows.Media;
 
using MS.Internal;
using MS.Win32;

namespace System.Windows.Automation.Peers 
{
 
    /// 
    public class RadioButtonAutomationPeer : ToggleButtonAutomationPeer, ISelectionItemProvider
    { 
        ///
        public RadioButtonAutomationPeer(RadioButton owner): base(owner)
        {}
 
        ///
        override protected string GetClassNameCore() 
        { 
            return "RadioButton";
        } 

        ///
        override protected AutomationControlType GetAutomationControlTypeCore()
        { 
            return AutomationControlType.RadioButton;
        } 
 
        ///
        override public object GetPattern(PatternInterface patternInterface) 
        {
            if (patternInterface == PatternInterface.SelectionItem)
            {
                return this; 
            }
            return null; 
        } 

        ///  
        /// Sets the current element as the selection
        /// This clears the selection from other elements in the container
        /// 
        void ISelectionItemProvider.Select() 
        {
            if (!IsEnabled()) 
                throw new ElementNotEnabledException(); 

            ((RadioButton)Owner).IsChecked = true; 
        }


        ///  
        /// Adds current element to selection
        ///  
        void ISelectionItemProvider.AddToSelection() 
        {
            if (((RadioButton)Owner).IsChecked != true) 
                throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed));
        }

 
        /// 
        /// Removes current element from selection 
        ///  
        void ISelectionItemProvider.RemoveFromSelection()
        { 
            // If RadioButton is checked - RemoveFromSelection is invalid operation
            if (((RadioButton)Owner).IsChecked == true)
                throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed));
        } 

 
        ///  
        /// Check whether an element is selected
        ///  
        /// returns true if the element is selected
        bool ISelectionItemProvider.IsSelected
        {
            get 
            {
                return ((RadioButton)Owner).IsChecked == true; 
            } 
        }
 

        /// 
        /// The logical element that supports the SelectionPattern for this Item
        ///  
        /// returns an IRawElementProviderSimple
        IRawElementProviderSimple ISelectionItemProvider.SelectionContainer 
        { 
            get
            { 
                return null;
            }
        }
 
        //
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] 
        internal override void RaiseToggleStatePropertyChangedEvent(bool? oldValue, bool? newValue) 
        {
            RaisePropertyChangedEvent( 
                SelectionItemPatternIdentifiers.IsSelectedProperty,
                oldValue == true,
                newValue == true);
        } 

    } 
} 


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

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