TextBoxAutomationPeer.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Automation / Peers / TextBoxAutomationPeer.cs / 1407647 / TextBoxAutomationPeer.cs
                        

                        
                            using System; 
using System.Collections.Generic;
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.Controls.Primitives;
using System.Windows.Interop; 
using System.Windows.Media;
using System.Windows.Documents;

using MS.Internal; 
using MS.Internal.Automation;
using MS.Win32; 
 
namespace System.Windows.Automation.Peers
{ 
    ///
    public class TextBoxAutomationPeer : TextAutomationPeer, IValueProvider
    {
        /// 
        public TextBoxAutomationPeer(TextBox owner): base(owner)
        { 
            _textPattern = new TextAdaptor(this, ((TextBoxBase)owner).TextContainer); 
        }
 
        ///
        override protected string GetClassNameCore()
        {
            return "TextBox"; 
        }
 
        /// 
        override protected AutomationControlType GetAutomationControlTypeCore()
        { 
            return AutomationControlType.Edit;
        }

        /// 
        override public object GetPattern(PatternInterface patternInterface)
        { 
            object returnValue = null; 

            if(patternInterface == PatternInterface.Value) 
                returnValue = this;

            if (patternInterface == PatternInterface.Text)
            { 
                if(_textPattern == null)
                    _textPattern = new TextAdaptor(this, ((TextBoxBase)Owner).TextContainer); 
 
                return _textPattern;
            } 

            if (patternInterface == PatternInterface.Scroll)
            {
                TextBox owner = (TextBox)Owner; 
                if (owner.ScrollViewer != null)
                { 
                    returnValue = owner.ScrollViewer.CreateAutomationPeer(); 
                    ((AutomationPeer)returnValue).EventsSource = this;
                } 
            }

            if (patternInterface == PatternInterface.SynchronizedInput)
            { 
                returnValue = base.GetPattern(patternInterface);
            } 
            return returnValue; 
        }
 
        bool IValueProvider.IsReadOnly
        {
            get
            { 
                TextBox owner = (TextBox)Owner;
                return owner.IsReadOnly; 
            } 
        }
 
        string IValueProvider.Value
        {
            get
            { 
                TextBox owner = (TextBox)Owner;
                return owner.Text; 
            } 
        }
 
        void IValueProvider.SetValue(string value)
        {
            if(!IsEnabled())
                throw new ElementNotEnabledException(); 

            TextBox owner = (TextBox)Owner; 
 
            if (owner.IsReadOnly)
            { 
                throw new ElementNotEnabledException();
            }
            if (value == null)
            { 
                throw new ArgumentNullException("value");
            } 
 
            owner.Text = value;
        } 

        //
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
        internal void RaiseValuePropertyChangedEvent(string oldValue, string newValue) 
        {
            if (oldValue != newValue) 
            { 
                RaisePropertyChangedEvent(ValuePatternIdentifiers.ValueProperty, oldValue, newValue);
            } 
        }

        //
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] 
        internal void RaiseIsReadOnlyPropertyChangedEvent(bool oldValue, bool newValue)
        { 
            if (oldValue != newValue) 
            {
                RaisePropertyChangedEvent(ValuePatternIdentifiers.IsReadOnlyProperty, oldValue, newValue); 
            }
        }

        ///  
        /// Gets collection of AutomationPeers for given text range.
        ///  
        internal override List GetAutomationPeersFromRange(ITextPointer start, ITextPointer end) 
        {
            return new List(); 
        }

        private TextAdaptor _textPattern;
    } 
}
 

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

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