Adding a Customozied 'More Windows...' Dialog to an MDI Application

To add a customized windows dialog to the windows menu, you just have to take only two following steps in the mainframe class...

  • Override InitPopupMenu and replace it with the following code :
  • #define DEFAULT_NUMBER_OF_MDIS 9
    
    void CMainFrame::OnInitMenuPopup(CMenu* pPopupMenu, 
                                     UINT nIndex, 
                                     BOOL bSysMenu )
    {
     CMDIFrameWnd::OnInitMenuPopup(pPopupMenu, nIndex, bSysMenu);
    
     // If the number of active windows is zero, the window submenu 
     // probably does'nt esists. If you have the window submenu present
     // even in zero child windows, remove this code.
    
     int nCount = 0;
     CWnd * pWnd = GetWindow (GW_CHILD);
     ASSERT (pWnd);
     pWnd = pWnd->GetWindow (GW_CHILD);
     while (pWnd)
     {
      nCount++;
      pWnd = pWnd->GetWindow (GW_HWNDNEXT);
     }
    
     // The count is zero. exit.
     if ( nCount == 0 )
      return;
    
     // If it's a system menu, we don't need to handle that...
     if ( !bSysMenu )
     {
      // The default handler places the "more windows" command in the 
      // submenu which contains IDs between AFX_IDM_FIRST_MDICHILD and 
      // AFX_IDM_LAST_MDICHILD, so check the popup for occurence of
      // AFX_IDM_FIRST_MDICHILD.
    
      int nLength = pPopupMenu->GetMenuItemCount();
      for ( int i = 0; i < nLength; i++ ) 
      { 
       if ( pPopupMenu->GetMenuItemID( i ) == AFX_IDM_FIRST_MDICHILD )
       {
        // Found. If the last item is already the "more windows"
        // command than remove it.
        if ( pPopupMenu->GetMenuItemID( nLength - 1 ) == 
        AFX_IDM_FIRST_MDICHILD + DEFAULT_NUMBER_OF_MDIS ) 
        {
         pPopupMenu->DeleteMenu( nLength - 1, MF_BYPOSITION );
        }
    
        // Add our own window command.
        // Note : The ID must be - ( AFX_IDM_FIRST_MDICHILD +  
        // ( total number of entries in window list supported ) ). 
        // This saves us to make any default handler for the  
        // command, as the default procedure itself 
        // handles the command and sends it to the mainframe class.
        pPopupMenu->AppendMenu(MF_ENABLED|MF_STRING, 
                               AFX_IDM_FIRST_MDICHILD + DEFAULT_NUMBER_OF_MDIS,
                               "&Windows..." );
    
        // Done the processing.
        return;
       }
      }
     }
    }
    
  • Override OnCommand and replace it with the following code:
  • BOOL CMainFrame::OnCommand(WPARAM wParam, LPARAM lParam) 
    {
     // If the command is "more windows" command call our 
     // own customized dialog
     if ( wParam == AFX_IDM_FIRST_MDICHILD + 9 )
     {
      // Replace CWindowDlg with your own class
      CWindowDlg dlgWindowDlg;
      dlgWindowDlg.DoModal();
    
      // OK. We handled the command so return true, 
      // as we don't want the default handler to 
      // handle this command too.
      return TRUE;
     }
    
     return CMDIFrameWnd::OnCommand(wParam, lParam);
    }
    

Downloads

Download demo project - 22 Kb


Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Event Date: April 15, 2014 The ability to effectively set sales goals, assign quotas and territories, bring new people on board and quickly make adjustments to the sales force is often crucial to success--and to the field experience! But for sales operations leaders, managing the administrative processes, systems, data and various departments to get it all right can often be difficult, inefficient and manually intensive. Register for this webinar and learn how you can: Align sales goals, quotas and …

  • Hybrid cloud platforms need to think in terms of sweet spots when it comes to application platform interface (API) integration. Cloud Velocity has taken a unique approach to tight integration with the API sweet spot; enough to support the agility of physical and virtual apps, including multi-tier environments and databases, while reducing capital and operating costs. Read this case study to learn how a global-level Fortune 1000 company was able to deploy an entire 6+ TB Oracle eCommerce stack in Amazon Web …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds