WindowsTitleBar.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / Win32Providers / MS / Internal / AutomationProxies / WindowsTitleBar.cs / 1305600 / WindowsTitleBar.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Spinner Proxy 
//
// History: 
//              preid                 Created
//
//---------------------------------------------------------------------------
 
using System;
using System.Collections; 
using System.Text; 
using System.Runtime.InteropServices;
using System.Windows; 
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.ComponentModel;
using MS.Win32; 

 
namespace MS.Internal.AutomationProxies 
{
    // the title bar contains the system menu, the context help, minimize, maximize and close buttons. 
    // there is a win32 title bar contant for the ime button.  There really is no such thing as an ims button
    // it's bogus.  So when this code apears to by using 1 for the item for the system menu it will never
    // conflict because the ime button does not exist.
    class WindowsTitleBar: ProxyFragment 
    {
        // ----------------------------------------------------- 
        // 
        // Constructors
        // 
        // -----------------------------------------------------

        #region Constructors
 
        public WindowsTitleBar (IntPtr hwnd, ProxyFragment parent, int item)
            : base( hwnd, parent, item ) 
        { 
            // Set the strings to return properly the properties.
            _cControlType = ControlType.TitleBar; 

            _sAutomationId = "TitleBar"; // This string is a non-localizable string
            // _cControlType = ControlType.TitleBar;
 
            _fNonClientAreaElement = true;
            _fIsContent = false; 
        } 

        #endregion Constructors 

        //------------------------------------------------------
        //
        //  Patterns Implementation 
        //
        //----------------------------------------------------- 
 
        #region ProxySimple Interface
 
        /// Gets the bounding rectangle for this element
        internal override Rect BoundingRectangle
        {
            get 
            {
                return Misc.GetTitleBarRect(_hwnd); 
            } 
        }
 
        /// Returns the Run Time Id.
        /// returns an array of ints as the concatenation of IDs
        internal override int [] GetRuntimeId ()
        { 
            return new int [] { 4, unchecked((int)(long)_hwnd), _item };
        } 
 
        //Gets the localized name
        internal override string LocalizedName 
        {
            get
            {
                return Misc.ProxyGetText(_hwnd); 
            }
        } 
 
        #endregion
 
        #region ProxyFragment Interface

        /// Returns the next sibling element in the raw hierarchy.
        /// Peripheral controls have always negative values. 
        /// Returns null if no next child.
        internal override ProxySimple GetNextSibling (ProxySimple child) 
        { 
            return ReturnNextTitleBarChild (true, child._item + 1);
        } 

        /// Returns the previous sibling element in the raw hierarchy.
        /// Peripheral controls have always negative values.
        /// Returns null is no previous. 
        internal override ProxySimple GetPreviousSibling (ProxySimple child)
        { 
            return ReturnNextTitleBarChild (false, child._item - 1); 
        }
 
        /// Returns the first child element in the raw hierarchy.
        internal override ProxySimple GetFirstChild ()
        {
            return ReturnNextTitleBarChild (true, NativeMethods.INDEX_TITLEBAR_MIC); 
        }
 
        /// Returns the last child element in the raw hierarchy. 
        internal override ProxySimple GetLastChild ()
        { 
            return ReturnNextTitleBarChild (true, NativeMethods.INDEX_TITLEBAR_MAC);
        }
        /// Returns a Proxy element corresponding to the specified screen coordinates.
        internal override ProxySimple ElementProviderFromPoint (int x, int y) 
        {
            int hit = Misc.ProxySendMessageInt(_hwnd, NativeMethods.WM_NCHITTEST, IntPtr.Zero, (IntPtr)NativeMethods.Util.MAKELONG(x, y)); 
            switch (hit) 
            {
                case NativeMethods.HTCAPTION: 
                    return this;

                case NativeMethods.HTMINBUTTON:
                    return CreateTitleBarChild(NativeMethods.INDEX_TITLEBAR_MINBUTTON); 

                case NativeMethods.HTMAXBUTTON : 
                    return CreateTitleBarChild(NativeMethods.INDEX_TITLEBAR_MAXBUTTON); 

                case NativeMethods.HTHELP : 
                    return CreateTitleBarChild(NativeMethods.INDEX_TITLEBAR_HELPBUTTON);

                case NativeMethods.HTCLOSE :
                    return CreateTitleBarChild(NativeMethods.INDEX_TITLEBAR_CLOSEBUTTON); 

                case NativeMethods.HTSYSMENU : 
                { 
                    // this gets us the system menu bar...
                    WindowsMenu sysmenu = WindowsMenu.CreateSystemMenu(_hwnd, this); 
                    // now drill into the menu item...
                    return sysmenu.CreateMenuItem(0);
                }
            } 
            return null;
        } 
 
        #endregion
 
        //------------------------------------------------------
        //
        //  Internal Methods
        // 
        //------------------------------------------------------
 
        #region Internal Methods 

        internal static bool HasTitleBar (IntPtr hwnd) 
        {
            return IsTitleBarVisible (hwnd);
        }
 
        internal ProxySimple CreateTitleBarChild (int item)
        { 
            switch (item) 
            {
                case _systemMenu: 
                    return WindowsMenu.CreateSystemMenu (_hwnd, this);

                case NativeMethods.INDEX_TITLEBAR_HELPBUTTON :
                case NativeMethods.INDEX_TITLEBAR_MINBUTTON : 
                case NativeMethods.INDEX_TITLEBAR_MAXBUTTON :
                case NativeMethods.INDEX_TITLEBAR_CLOSEBUTTON : 
                    return new TitleBarButton (_hwnd, this, item); 
            }
 
            return null;
        }

        #endregion Internal Methods 

        //----------------------------------------------------- 
        // 
        //  Internal Fields
        // 
        //------------------------------------------------------

        #region Internal Fields
 
        internal const int _systemMenu = 1;
 
        #endregion 

        //----------------------------------------------------- 
        //
        //  Private Methods
        //
        //----------------------------------------------------- 

        #region Private Methods 
 
        // Not all the titlebar children exist for every titlebar so this get the next one that exists
        private ProxySimple ReturnNextTitleBarChild (bool next, int start) 
        {
            UnsafeNativeMethods.TITLEBARINFO ti;
            Misc.ProxyGetTitleBarInfo(_hwnd, out ti);
            ProxySimple el; 

            for (int i = start; i >= NativeMethods.INDEX_TITLEBAR_MIC && i <= NativeMethods.INDEX_TITLEBAR_MAC; i += next ? 1 : -1) 
            { 
                // the system menu is taking the slot in the bogus IME button so it will allway be invisible
                // therefore make an exception for the system menu. 
                if (!Misc.IsBitSet(ti.rgstate[i], NativeMethods.STATE_SYSTEM_INVISIBLE) || i == _systemMenu)
                {
                    el = CreateTitleBarChild (i);
                    if (el != null) 
                        return el;
                } 
            } 

            return null; 
        }

        private static bool IsTitleBarVisible (IntPtr hwnd)
        { 
            UnsafeNativeMethods.TITLEBARINFO ti;
            if (Misc.ProxyGetTitleBarInfo(hwnd, out ti)) 
            { 
                return !Misc.IsBitSet(ti.rgstate[0], NativeMethods.STATE_SYSTEM_INVISIBLE);
            } 
            return false;
        }

        #endregion Private Methods 

        //----------------------------------------------------- 
        // 
        //  TitleBarButton Private Class
        // 
        //------------------------------------------------------

        #region TitleBarButton
 
        class TitleBarButton: ProxySimple, IInvokeProvider
        { 
            //----------------------------------------------------- 
            //
            //  Constructors 
            //
            //------------------------------------------------------

            #region Constructors 

            public TitleBarButton (IntPtr hwnd, ProxyFragment parent, int item) 
            : base( hwnd, parent, item) 
            {
                _fNonClientAreaElement = true; 
                _cControlType = ControlType.Button;
                _fIsContent = false;
            }
 
            #endregion
 
            //------------------------------------------------------ 
            //
            //  Patterns Implementation 
            //
            //-----------------------------------------------------

            #region ProxySimple Interface 

            /// Returns a pattern interface if supported. 
            internal override object GetPatternProvider (AutomationPattern iid) 
            {
                if (iid == InvokePattern.Pattern) 
                {
                    return this;
                }
 
                return null;
            } 
 
            /// Process all the Logical and Raw Element Properties
            internal override object GetElementProperty (AutomationProperty idProp) 
            {
                if (idProp == AutomationElement.AutomationIdProperty)
                {
                    switch (_item) 
                    {
                        case NativeMethods.INDEX_TITLEBAR_HELPBUTTON: 
                            return "Help";  // This string is a non-localizable string 

                        case NativeMethods.INDEX_TITLEBAR_MINBUTTON: 
                            if (Misc.IsBitSet(WindowStyle, NativeMethods.WS_MINIMIZE))
                            {
                                return "Restore";  // This string is a non-localizable string
                            } 
                            else
                            { 
                                return "Minimize";  // This string is a non-localizable string 
                            }
 
                        case NativeMethods.INDEX_TITLEBAR_MAXBUTTON:
                            if (Misc.IsBitSet(WindowStyle, NativeMethods.WS_MAXIMIZE))
                            {
                                return "Restore";  // This string is a non-localizable string 
                            }
                            else 
                            { 
                                return "Maximize";  // This string is a non-localizable string
                            } 

                        case NativeMethods.INDEX_TITLEBAR_CLOSEBUTTON:
                            return "Close";  // This string is a non-localizable string
 
                        default:
                            break; 
                    } 
                }
                else if (idProp == AutomationElement.IsEnabledProperty) 
                {
                    switch (_item)
                    {
                        case NativeMethods.INDEX_TITLEBAR_HELPBUTTON: 
                            if (Misc.IsBitSet(WindowStyle, NativeMethods.WS_DISABLED))
                            { 
                                return false; 
                            }
 
                            return Misc.IsBitSet(WindowExStyle, NativeMethods.WS_EX_CONTEXTHELP);

                        case NativeMethods.INDEX_TITLEBAR_MINBUTTON:
                        { 
                            int style = WindowStyle;
 
                            if (Misc.IsBitSet(style, NativeMethods.WS_DISABLED)) 
                            {
                                return false; 
                            }

                            return Misc.IsBitSet(style, NativeMethods.WS_MINIMIZEBOX);
                        } 

                        case NativeMethods.INDEX_TITLEBAR_MAXBUTTON: 
                        { 
                            int style = WindowStyle;
 
                            if (Misc.IsBitSet(style, NativeMethods.WS_DISABLED))
                            {
                                return false;
                            } 

                            return Misc.IsBitSet(style, NativeMethods.WS_MAXIMIZEBOX); 
                        } 
                    }
                } 

                return base.GetElementProperty (idProp);
            }
 
            // Gets the bounding rectangle for this element
            internal override Rect BoundingRectangle 
            { 
                get
                { 
                    Rect[] rects = Misc.GetTitlebarRects(_hwnd);
                    return rects[_item];
                }
            } 

            //Gets the localized name 
            internal override string LocalizedName 
            {
                get 
                {
                    switch (_item)
                    {
                        case NativeMethods.INDEX_TITLEBAR_MINBUTTON: 
                            if (Misc.IsBitSet(WindowStyle, NativeMethods.WS_MINIMIZE))
                                return ST.Get(STID.LocalizedNameWindowsTitleBarButtonRestore); 
                            else 
                                return ST.Get(STID.LocalizedNameWindowsTitleBarButtonMinimize);
 
                        case NativeMethods.INDEX_TITLEBAR_HELPBUTTON:
                            return ST.Get(STID.LocalizedNameWindowsTitleBarButtonContextHelp);

                        case NativeMethods.INDEX_TITLEBAR_MAXBUTTON: 
                            if (Misc.IsBitSet(WindowStyle, NativeMethods.WS_MAXIMIZE))
                                return ST.Get(STID.LocalizedNameWindowsTitleBarButtonRestore); 
                            else 
                                return ST.Get(STID.LocalizedNameWindowsTitleBarButtonMaximize);
 
                        case NativeMethods.INDEX_TITLEBAR_CLOSEBUTTON:
                            return ST.Get(STID.LocalizedNameWindowsTitleBarButtonClose);

                        default: 
                            return ST.Get(STID.LocalizedNameWindowsTitleBarButtonUnknown);
                    } 
                } 
            }
 
            #endregion

            #region Invoke Pattern
 
            /// Same effect as a click on one of the title bar button
            void IInvokeProvider.Invoke () 
            { 
                // Make sure that the control is enabled
                if (!SafeNativeMethods.IsWindowEnabled(_hwnd)) 
                {
                    throw new ElementNotEnabledException();
                }
 
                int command;
                switch (_item) 
                { 
                    case NativeMethods.INDEX_TITLEBAR_MINBUTTON :
                        if ((WindowStyle & NativeMethods.WS_MINIMIZE) != 0) 
                            command = NativeMethods.SC_RESTORE;
                        else
                            command = NativeMethods.SC_MINIMIZE;
                        break; 

                    case NativeMethods.INDEX_TITLEBAR_HELPBUTTON : 
                        command = NativeMethods.SC_CONTEXTHELP; 
                        break;
 
                    case NativeMethods.INDEX_TITLEBAR_MAXBUTTON :
                        if ((WindowStyle & NativeMethods.WS_MAXIMIZE) != 0)
                            command = NativeMethods.SC_RESTORE;
                        else 
                            command = NativeMethods.SC_MAXIMIZE;
                        break; 
 
                    case NativeMethods.INDEX_TITLEBAR_CLOSEBUTTON :
                        if ((WindowStyle & NativeMethods.WS_MINIMIZE) != 0) 
                        {
                            Misc.PostMessage(_hwnd, NativeMethods.WM_SYSCOMMAND, (IntPtr)NativeMethods.SC_RESTORE, IntPtr.Zero);
                        }
 
                        command = NativeMethods.SC_CLOSE;
                        break; 
 
                    default :
                        return; 
                }

                // leave menu-mode if we're in it
                Misc.ClearMenuMode(); 

                // push the right button 
                Misc.PostMessage(_hwnd, NativeMethods.WM_SYSCOMMAND, (IntPtr)command, IntPtr.Zero); 
            }
 
            #endregion
        }
        #endregion
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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WindowsTitleBar.cs source code in C# .NET

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