Automatic Tab Bar for MDI Frameworks

• Download demo project - 62 Kb
• Download source files - 31 Kb

1. Introduction

This code implements MDI tab view for easy navigation. The views are supported on a control bar, which can be floated (of course docked!).

2. Implemented Features

1. Control bar-based owner-drawn tab view. Supports fonts and color settings, the default is as follows
   • The normal/inactive tab text is painted black,
   • The active tab text is painted blue,
   • The tab text of a modified document is painted red.
2. The control bar can be docked (currently only top and bottom) or floated.
3. Custom MDI window list dialogs, similar to VC++.
4. Full screen modes.
5. Cool menu popup, three types.
   • From a right click on the tab control itself, as shown above.
   • From the right click on the tab control bar.
   • From a right click in the MDI main window client area, just a place holder (demo) build yours.
6. Display of company logo text in the MDI main window client area.
7. MDI client background text logo and banner painting.
8. Saves and restores the state of the MDI child window, i.e. normal or maximize, and the position of the control bars and the main window frame.
9. Tool tips and tab icons (icons!...just a demo-do not know what will be better, let me know your views).
10. Minimum modifications to existing projects, say automated! Few changes to only existing main frame class and maybe application class, no base class to derive from.

3. Unicode?

There is no reason why it should not work!

4. Files required:

1. WindowManager.cpp/h: Manages the window list, and subclass the MDI client to create the tab view bar. It also contain the class CDocumentList, which lists all open documents. This is really where life begins...
   NOTE: The CDocumentList class can be very useful for many applications, take a good look.
2. ViewManager.cpp/h: Manages the views of the application, creating the view tabs.
3. WindowTabCtrl.cpp/h: Codes implementing the tab control.
4. PopupMenu.cpp/h: Codes implementing the popup menu.

   Others

5. tabview.rc: The full screen toolbar, popup menus and window list dialog resource.
6. tabview.h: Contains the resource ids needed by the controls. (NOTE: Not used directly, deleted later).
7. tabview.bmp: The full screen and popup menus bitmap.

5. How to use it?

There is a bit of work involved in integrating the resource file into your project. Lets do it, the difficult part first...

1. Move the bitmap file, tabview.bmp to your res directory, and tabview.rc to the project directory.
2. Add the resource file tabview.rc to the project's *.rc2 file, and merge the resource id file tabview.h with your resource file, resource.h. If you have not being manually modifying resource files then read this...
   • Identify the last resource type (numbering starts from 128) in your resource.h file, copy and paste the resource type identifiers (2) from the tabview.h, give each an incremental id and finally increment the VC++ object _APS_NEXT_RESOURCE_VALUE by 2, i.e. 1 more than the last incremental id.
   • Similarly, copy and paste the dialog control ids (8) (numbering starts from 1000) and increment the _APS_NEXT_CONTROL_VALUE by 8.
   • Finally, copy and paste the menu items ids (9) ( numbering starts from 32771) and increment the _APS_NEXT_COMMAND_VALUE by 9. The project should now compile without any problem, and you can now delete the tabview.h file.
3. Now, move the files WindowManager.cpp/h, ViewManager.cpp/h, WindowTabCtrl.cpp/h and PopupMenu.cpp/h to the project directory and add the implementation files to the project.
4. Open the WindowManager.h file, and in the Forward Declaration part change the CMainFrame to your main window frame class name (see TODO). Also include the header file of your main frame class in the WindowManager.cpp.
5. Include header files, WindowManager.h and ViewManager.h in your main frame header file and declare in a public section the following:

       CMDIClient   m_MDIClient;
       void GetControlBarsEx(CArray<CControlBar*, CControlBar*>& arrBars);

   • m_MDIClient, is an instance of the window manager, where all events are coordinated.
   • GetControlBarsEx, a new method to help the full screen mode. Provide an implementation of this method similar to this: (add all controls bars you wish to manage in full screen to the array parameter)

     void CMainFrame::GetControlBarsEx(CArray<CControlBar*, 
                                       CControlBar*>& arrBars)
     {
         if (::IsWindow(m_wndToolBar.m_hWnd))
             arrBars.Add(&m_wndToolBar); 
         if (::IsWindow(m_wndStatusBar))
             arrBars.Add(&m_wndStatusBar); 
     
         //...more here
     
     }
     

6. Towards the end of the OnCreate() function of the main frame add the ff:

       VERIFY(m_MDIClient.SubclassMDIClient(this));
   

   The SubclassMDIClient() is prototyped as
   

       BOOL SubclassMDIClient(CMDIFrameWnd* pMDIFrameWnd,
           CViewManager* pViewManager, UINT uID = ID_VIEW_VIEWTAB);
   

   • pMDIFrameWnd, is a pointer to the application's main frame.
   • pViewManager, a pointer to an instance of the viewmanager. The viewmanager, control bar and tab control, is created by the window manager.
   • uID, an id of the control bar. With the defaulted value, hiding and showing of the control bar is already implemented. If, however, you decide to use a different id-say ID_THE_NEWVALUE, you can easily implement the hiding and showing of the tab control bar by inserting the following in your main frame message map. No further code is required. This is what is done to the default status bar and toolbar created by the AppWizard...

         ON_COMMAND_EX(ID_THE_NEWVALUE, OnBarCheck)
         ON_UPDATE_COMMAND_UI(ID_THE_NEWVALUE, OnUpdateControlBarMenu)
     

7. In order for command messages to be handled directly in the CWindowManager, use the ClassWizard to override the OnCmdMsg() method of the main frame and modify it to be similar to the ff:

   // This function routes commands to window manager, then to rest of system.
   
   BOOL CMainFrame::OnCmdMsg(UINT nID, int nCode,
           void* pExtra, AFX_CMDHANDLERINFO* pHandlerInfo)
   {
       // Without this, the window manager menu commands will be disabled,
   
       // this is because without routing the command to the window manager,
   
       // MFC thinks there is no handler for it.
   
   
       if (m_MDIClient.OnCmdMsg(nID, nCode, pExtra, pHandlerInfo))
           return TRUE;
   
       return CMDIFrameWnd::OnCmdMsg(nID, nCode, pExtra, pHandlerInfo);
   }
   

8. Tired eh! Just compile and have fun...
9. Well, you will need this too...build the menus, all the menu ids are already defined so just select them from the ID combo box of the property sheet.
   • On the View menu build the ff:

     Menu Item ID	MENU ITEM STRING
     ID_VIEW_VIEWTAB	Op&en File Tabs
     ID_VIEW_FULLSCREEN	F&ull Screen

     
     
   • On the Window menu build the ff:

     ID_WINDOW_NEXT	Ne&xt Window
     ID_WINDOW_PREVIOUS	Pre&vious Window
     ID_WINDOW_CLOSE_ALL	C&lose All
     ID_WINDOW_SAVE_ALL	&Save All

   • Note: The Windows... menu is build for you automatically.
10. Well, well, well...if you need to support the position and control bar restoration then do this...(unfortunately, neither the main frame class destructor nor the window manager class destructor is called by the MFC framework!)
    • Add message handle for the WM_CLOSE message for your main frame, or modify the existing one adding the following single line, calling the SaveMainFrameState() method...

      void CMainFrame::OnClose()
      {
                     ......
          m_MDIClient.SaveMainFrameState();
                     ......
          CMDIFrameWnd::OnClose();
      }
      

    • Finally! replace the main frame displaying code at the end of the InitInstance() of application class with the RestoreMainFrameState() as

      BOOL CDemoApp::InitInstance()
      {
          .............................
          // The main window has been initialized, so show and update it.
      
      //    pMainFrame->ShowWindow(m_nCmdShow); ///// <--- we do not need this one!
      
          pMainFrame->m_MDIClient.RestoreMainFrameState(m_nCmdShow);
          pMainFrame->UpdateWindow();
      
          return TRUE;
      }
      

6. Code Snippets

The icon support in the tab is application specific. What I mean is you will need to build a more suitable solution for your application. If, however, you have some ideas as how to implement something general let me know.

For the current implementation...
The OnCreate() function of the CViewManager, which created both the tab and itself (the tab bar), simply creates a place holder icon to fill an image list, which is then attached to the tab.

int CViewManager::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CControlBar::OnCreate(lpCreateStruct) == -1)
        return -1;

    m_ViewTabImages.Create(16, 16, ILC_MASK, 5, 5);

    m_ViewTabCtrl.Create(WS_CHILD | WS_VISIBLE | WS_EX_NOPARENTNOTIFY |
        TCS_TOOLTIPS | TCS_SINGLELINE | TCS_FOCUSNEVER | TCS_FORCELABELLEFT,
        CRect(0, 0, 0, 0), this, ID_VIEWTAB);

    m_ViewTabCtrl.SetImageList(&m_ViewTabImages);
    // Build the image list here

    HICON hIcon = AfxGetApp()->LoadStandardIcon(IDI_APPLICATION);
//    HICON hIcon = AfxGetApp()->LoadIcon(IDR_DEMOTYPE);

    m_ViewTabImages.Add(hIcon);
    // Enable tooltips for all controls

    EnableToolTips(TRUE);

    return 0;
}

LoadStandardIcon() is used to load system icon in there. You may wish to replace this with the commented code, IDR_DEMOTYPE is your application specific resource type.

    HICON hIcon = AfxGetApp()->LoadIcon(IDR_DEMOTYPE);

In the AddView() function of the same class, the tab image index is set to 0 (zero) the only image in the image list. Finally, in the DrawItem() function of the tab, CWindowTabCtrl, the dummy icon is replaced by the small icon attached to the frame of your child window, parent of the view.

void CWindowTabCtrl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
....

    CView* pView    = reinterpret_cast<CView*>(tci.lParam);
    CDocument* pDoc = pView->GetDocument();

    // Draw image

    if (m_bDisplayIcons)
    {
        CImageList* pImageList = GetImageList();
        CMDIChildWnd* pViewFrame = static_cast<CMDIChildWnd*>(pView->GetParent());
        HICON hIcon = reinterpret_cast<HICON>(GetClassLong(pViewFrame->m_hWnd, 
                                              GCL_HICONSM));
        pImageList->Replace(nTabIndex, hIcon);
          ....
    }
....
}

Initially, I considered getting the icon from the Windows shell, based on the registered file extension SHGetFileInfo() API. However, it does not look nice for the view frame icon to be different from the tab view icon. By the current implementation, all is needed is a good citizenship like the VC++ itself. Let your application child window system icons reflect the file type and there will be no need to write extra codes.

7. Credits

The code is based on code and ideas shared by the following:

• Iuri Apollonio, he wrote the base codes using status bar. What is his new email address?
• Ivan Zhakov, his "MDI Windows Manager dialog" is better than Iuri's. The Window manager class is now the main engine driving the view manager.
• Chris Maunder, his owner-drawn tab control code snippets are used to improve Iuri's.
• Adolf Szabo, his Full-screen mode idea is simpler than that implemented by MS and MS's Mike B.
• YOU, and many others...

8. To Do

1. Ability to dock on all sides of the main frame, involves more work since the tab control is owner-drawn.
2. Improved main frame window position saving and restoration...
   • Support for multiple monitors-I do not have the OS (Win98/Win2000) to test this now (if I do, not the video card and monitors!)
   • Support for screen resolution changes. I have API code for my C/SDK application, well tested on Win95 using the QuickRes program. I do not use QuickRes currently, so a bit reluctant to implement it.
3. Your wishes...

9. Known Issues

1. The popup menu does not currently support accelerators (but is this needed?).
2. The modified flag is not re-drawn immediately, I do not wish to play any game to introduce flickers! (implementation still good enough!).
3. Add yours...

10. In this Update

1. Many parts are rewritten to address most of the issues in the comment section.
2. The "tab view" is now CMDIChildWnd class, so splitters and others should work.
3. Many bug fixes.
4. Should work with existing codes without little modifications, see Step 5.

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Flicker Removal for OnMDIActivate Japanime 2:51 26 Mar '07   When switching between maximized MDI windows there exists a flicker. FIX: BEGIN_MESSAGE_MAP(CMDIClient, CWnd) ....... ....... ON_WM_MDIACTIVATE() ....... ....... END_MESSAGE_MAP() void CMDIClient::OnMDIActivate(BOOL bActivate, CWnd* pActivateWnd, CWnd* pDeactivateWnd) { SendMessage(WM_SETREDRAW,FALSE,NULL); CWnd::OnMDIActivate(bActivate, pActivateWnd, pDeactivateWnd); SendMessage(WM_SETREDRAW,TRUE,NULL); InvalidateRect(NULL,TRUE); SetWindowPos(NULL,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE|SWP_NOZORDER|SWP_DRAWFRAME); } Sign In·View Thread·PermaLink 4.00/5 (2 votes) Docking right of a toolbar Dieter Hammer 23:10 31 Jan '07   If you want to dock this right of another toolbar, you can make this little change. CSize CViewManager::CalcFixedLayout(BOOL bStretch, BOOL bHorz) { ASSERT_VALID(this); ASSERT(::IsWindow(m_hWnd)); if (bStretch) // the bar is stretched (is not the child of a dockbar) return CSize(bHorz ? 32767 : m_sizeDefault.cx, bHorz ? m_sizeDefault.cy : 32767); CClientDC dc(NULL); HFONT hFont = reinterpret_cast(SendMessage(WM_GETFONT)); HFONT hOldFont = NULL; if (hFont != NULL) hOldFont = reinterpret_cast(dc.SelectObject(hFont)); TEXTMETRIC tm; VERIFY(dc.GetTextMetrics(&tm)); if (hOldFont != NULL) dc.SelectObject(hOldFont); // get border information CRect viewrect,parentrect; // new GetWindowRect(viewrect); // new GetParent()->GetWindowRect(parentrect); // new int diff = viewrect.left - parentrect.left; // new CSize size; CRect rcInside, rcWnd; rcInside.SetRectEmpty(); CalcInsideRect(rcInside, bHorz); GetParentFrame()->GetWindowRect(&rcWnd); size.cx = rcWnd.Width() - diff; // changed size.cy = tm.tmHeight + tm.tmInternalLeading // - 1 + ::GetSystemMetrics(SM_CYBORDER) * 5 - rcInside.Height(); return size; } Sign In·View Thread·PermaLink 1.00/5 (1 vote) Memory leak in constructor totof 1:31 21 Oct '05   Hi Fine work but there is a little problem of memory leak. In the CMDIClient constructor, you should not get memory for the LOGFONT. Because the function GetProfileBinary that you call is also doing it and so the memory you got before is lost. If you look inside GetProfileBinary, you can see BOOL CWinApp::GetProfileBinary(LPCTSTR lpszSection, LPCTSTR lpszEntry, BYTE** ppData, UINT* pBytes) { .../... *ppData = NULL; <-- :confused: Your memory for LOGFONT is lost here .../... *ppData = new BYTE[*pBytes]; .../... The corrected code is : CMDIClient::CMDIClient() .../... LOGFONT* plf = NULL; :-D //DO NOT DO THIS -> :mad: = new LOGFONT; UINT dwSize = sizeof(LOGFONT); bSuccess = pApp->GetProfileBinary(szSection, szLogoFont, (BYTE**)&plf, &dwSize); .../... if (plf) delete plf; .../... Sign In·View Thread·PermaLink How can I use flat buttons, without 3D look for selected items avwa 7:56 9 Aug '04   Hi, How can I use the flat buttons style, and overwrite the drawing of the tab so that the selected tab will not be sunken (I just want to fill the selected rect with white background). How can I do it? I'll also appriciate sample code if its not to hard. Thanks Sign In·View Thread·PermaLink Positioning the controlbar *Dreamz 1:50 7 Apr '04   Hi I want the control bar to be loaded at the bottom of the window by default,every time when i starts the application. I tried it with CBRS_BOTTOM,but it is not working... Can anybody help me... Thanks Sign In·View Thread·PermaLink Re: Positioning the controlbar kolu narayan, 8:44 3 Sep '04   hello, DockControlBar(&m_wndToolBar, AFX_IDW_DOCKBAR_BOTTOM); ----This will help you to position your Control bar at the bottom CPoint m_pointPosToolBar = CPoint(100,100); FloatControlBar(&m_wndToolBar,m_pointPosToolBar); ---This will help you to position your Control at desired CPoint coordinate Sign In·View Thread·PermaLink problem to make full-screen saeed shahbazi 21:49 28 Mar '04   hi dear. I am trying to create an application-MDI container-and I want to have a fullscreen mode when the user insert an object in a view. you know I use stingray but it doesn't allow it so i changed the code. but when it goes to fullscreen and i try to switch betweeb views it's crash or the menu makes disable. please help me if you know anything. thanks. Saeed Shahbazi. Sign In·View Thread·PermaLink 1.00/5 (1 vote) Re: problem to make full-screen Paul Selormey 22:00 28 Mar '04   It is difficult to see where the problem is. Can you create a simple demo and send it to me? Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink Demo does not compile shubharamani 13:49 23 Sep '03   the pch file is missing. please fix ! thanks, Shubha Ramani shubha ramani shubharamani@yahoo.com Sign In·View Thread·PermaLink Re: Demo does not compile Trevor Larkum 2:17 10 Feb '04   Turn off use of precompiled headers. Sign In·View Thread·PermaLink 1.00/5 (1 vote) Thank! conquestjy 19:43 8 Jan '03   It's Very good Code,I using These Code in my new project,I showed derivation of these code in my project.Thanks you! I'm Chinese Programmer.My name is Jianyong. Sign In·View Thread·PermaLink Re: Thank! vikas amin 0:31 22 Sep '05   This code was also usefull to me, but if u know how to use the CScrollView in MDI with base class as CView. I basically want to display some data to the user with scrolling capability but there is and error as the new view i have crated is a Child to the main window , an assertion is displayed. Thanking you Vikas Amin Embin Technology Bombay vikas.amin@embin.com Sign In·View Thread·PermaLink Want buttons Stefan Dahlin 2:29 5 Jan '03   Whit this new update the buttons on the controlbar look like a ordinary tab control. In the previous version it looked like plain buttons on a controlbar. I want the old looking. How do i do that? Sign In·View Thread·PermaLink Re: Want buttons Paul Selormey 3:27 5 Jan '03   Hello, Nothing changed. From the Demo menu select "Demo" to display a dialog box. Play with the "View tab button style" you will see how to set all the styles. The previews version has the "Buttons" and "Flat Buttons" as the default style. The current version has "Normal" as the default style. If you still have problem, let me know. Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink a bug in the CTabCtrl benben 3:35 24 Dec '02   Hi: I find a bug in the CTabCtrl.When you press "Ctrl+N" to create many views,then close one by one from the end, you will see the drawing of the ctabctrl is not correct.Maybe this is a bug of CTabCtrl, and do you have any idea ? thanks benben Sign In·View Thread·PermaLink Re: a bug in the CTabCtrl Paul Selormey 3:34 5 Jan '03   Please can you send me a screenshot of the wrong tab drawing. I am trying to reproduce the bug but still could not get it. Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink Re: a bug in the CTabCtrl Zamurad 10:42 12 Apr '04   Open up as many windows that you get the scroll button, which is really a msctls_updown32 control. Resize your window so you get your last view under msctls_updown32 button and also maximaze the tab window by double clicking on title bar. Now start hitting the "x" to close tab from the last, you will see the problem with CTabCtrl that it does not update all the tabs rather the control bar is appeared empty but if you click on comtrol bar area then it updates that tab only. Its a bug in CTabCtrl Microsoft needs to be informed. If some one knows the solution please drop me email. Thanks Sign In·View Thread·PermaLink 4.33/5 (3 votes) Re: a bug in the CTabCtrl code_discuss 19:36 22 Apr '08   I reproduced the bug, I think you can scroll the tab when it's invisible. Take the code for scrolling the tab control. // Get the up-down (spin) control that is associated with the tab control // and which contains scroll position information. if( !m_pSpinCtrl ) { CWnd * pWnd = FindWindowEx( GetSafeHwnd(), 0, _T("msctls_updown32"), 0 ); if( pWnd ) { // DevNote: It may be somewhat of an overkill to use the MFC version // of the CSpinButtonCtrl since were actually only using it // for retrieving the current scroll position (GetPos). A simple // HWND could have been enough. m_pSpinCtrl = new CSpinButtonCtrl; m_pSpinCtrl->Attach(pWnd->GetSafeHwnd()); } } CRect rect; GetClientRect(&rect); // Examine whether we should scroll left... if( point.x < rect.left && m_pSpinCtrl ) { int nPos = LOWORD(m_pSpinCtrl->GetPos()); if( nPos > 0 ) { InvalidateRect(&m_InsertPosRect,false); ZeroMemory(&m_InsertPosRect,sizeof(m_InsertPosRect)); SendMessage(WM_HSCROLL,MAKEWPARAM(SB_THUMBPOSITION,nPos-1),0); } } // Examine whether we should scroll right... if( point.x > rect.right && m_pSpinCtrl && m_pSpinCtrl->IsWindowVisible()) { InvalidateRect(&m_InsertPosRect,false); ZeroMemory(&m_InsertPosRect,sizeof(m_InsertPosRect)); int nPos = LOWORD(m_pSpinCtrl->GetPos()); SendMessage(WM_HSCROLL,MAKEWPARAM(SB_THUMBPOSITION,nPos+1),0); } original code link is http://www.suodenjoki.dk/us/productions/articles/dragdroptab.htm#Scrolling[^] Sign In·View Thread·PermaLink BUG in article source (edited) Roger Allen 6:58 12 Dec '02   [EDIT] Oooops - Its not a bug in your source. It was a bug in mine. I recently upgraded my older version with parts of this new one. So if you do the same, this could apply to you. [/EDIT] In the file ViewManager.cpp, a message map entry is declared incorrectly. The line ON_NOTIFY(TTN_NEEDTEXT, 0, OnViewManagerToolTip) should be ON_NOTIFY_EX(TTN_NEEDTEXT, 0, OnViewManagerToolTip) This cause the MDC OnCmdMsg() function to call OnViewManagerToolTip() with only 2 parameters and not 3 which you get for ON_NOTIFY_EX. This bug has sneaked in from an earlier version of this source which was correct. To simulate it, run the code in debug mode and get a tooltip to appear. On my system I get an application error deep in MFC code. Not sure what bad things it would do in release mode. Roger Allen Sonork 100.10016 This is a multiple choice question, choose wisely Why did the hedgehog cross the road? A: To show he had guts? B: To see his flat mate? Sign In·View Thread·PermaLink Re: BUG in article source (edited) Paul Selormey 14:18 12 Dec '02   Well, this article needs an update and I will do all to update it this weekend - just busy porting a huge application to .NET now Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink 4.40/5 (2 votes) Changing views problem Stefan Dahlin 6:16 6 Dec '02   I'm trying to have different views for my documents. But when i change view, and then use RemoveView or by calling DestroyWindow on the old view, i get a program crash on line 94 in ViewManager.cpp. Anybode know what i can do to be able to change views and still use this MDI Tab Bar? Sign In·View Thread·PermaLink Re: Changing views problem Paul Selormey 2:29 8 Dec '02   I had an updated version long ago, just feeling lazy. I could send you the codes if you wish. Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink 2.00/5 (1 vote) Not working for everyone. Rainer Koschnick 13:04 12 Sep '02   Not everyone has a Tool- and StatusBar in his MainFrame. In that case the code just crashes. Sign In·View Thread·PermaLink Re: Not working for everyone. Paul Selormey 16:12 12 Sep '02   Hello, Sorry, for not updating these codes. Now, please explain your problem a bit more - I do not clearly understand your statement. Best regards, Paul. Jesus Christ is LOVE! Please tell somebody. Sign In·View Thread·PermaLink Re: Not working for everyone. Rainer Koschnick 22:17 12 Sep '02   Your code seems to assume blindly that CMainFrame has CStatusBar and CToolbar members which doesn't have to be the case. I have created an application which doesn't have either of them, instead Tool- and Statusbar's are created inside the child frames. I also tried to remove them from your demo application, commented out the calls to their members functions and your demo also crashes when the main window is created. Sign In·View Thread·PermaLink

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