CSDITrueColorTabs

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Introduction

I have an SDI (Single Document Interface) application with several views. I had to do the switching between the views with a tab control but I didn�t find anywhere an example for this. I found Christian Rodemeyer�s CMDITabs and it took me half an hour to modify it into this class. I also liked Dany Cantin�s CTrueColorToolBar and from that class I used the method that does the true color bitmaps (SetTrueColorTabs). So there you have it: you can have several views and switch between them without using CpropertySheet or something else..

How to use

It�s very easy to use. You don�t have to change anything in your application architecture. You have to add SDITrueColorTabs.h and SDITrueColorTabs.cpp to your project. In your CmainFrame class add a new member m_wndSDITabs of class CSDITrueColorTabs (don�t forget to include SDITrueColorTabs.h).

// MainFrm.h

class CMainFrame : public CMDIFrameWnd
{
  [...]
  CSDITrueColorTabs m_wndSDITabs;
  
  virtual void OnUpdateFrameTitle(BOOL bAddToTitle); 
  [...]  
};
// MainFrm.cpp

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) {
  [...]
 m_wndTabs.Create(this,MT_TOP | MT_IMAGES);
 //m_wndTabs.SetImageList(&m_ToolTipIcons1);

 m_wndTabs.ViewsList.AddTail(m_pView1);
 m_wndTabs.ViewsList.AddTail(m_pView2);
 m_wndTabs.TextLabels.AddTail("Contacte");
 m_wndTabs.TextLabels.AddTail("Informatii");
 m_wndTabs.LoadTrueColorTabs(26,IDB_TABS_ICONS);
 return 0;
}
void CMainFrame::OnUpdateFrameTitle(BOOL bAddToTitle)
{
  CFrameWnd::OnUpdateFrameTitle(bAddToTitle);
  m_wndSDITabs.Update(); 
}

m_pView1 and m_pView2 are pointers to your views.

The method SwitchView(viewNo) used to switch between the views is declared in my app.cpp and it looks like this:

CView* CtestApp::SwitchView(int viewNo)
{
          CView* pActiveView =
      ((CFrameWnd*) m_pMainWnd)->GetActiveView();
 
   CView* pNewView= NULL;
 
   if ((viewNo == 1 && pActiveView == m_pView1) || 
            (viewNo == 2 && pActiveView == m_pView2)) { 
       return pNewView;
   } else {
       switch (viewNo) {
           case 1:
               pNewView = m_pView1;
               break;
           case 2:
               pNewView = m_pView2;
               break;
       }
          
       // Exchange view window IDs so RecalcLayout() works.

       #ifndef _WIN32
           UINT temp = ::GetWindowWord(pActiveView->m_hWnd, GWW_ID);
           ::SetWindowWord(pActiveView->m_hWnd, GWW_ID, 
                  ::GetWindowWord(pNewView->m_hWnd, GWW_ID));
           ::SetWindowWord(pNewView->m_hWnd, GWW_ID, temp);
       #else
             UINT temp = ::GetWindowLong(pActiveView->m_hWnd, GWL_ID);
             ::SetWindowLong(pActiveView->m_hWnd, GWL_ID, 
                 ::GetWindowLong(pNewView->m_hWnd, GWL_ID));
             ::SetWindowLong(pNewView->m_hWnd, GWL_ID, temp);
       #endif
 
       pActiveView->ShowWindow(SW_HIDE);
       pNewView->ShowWindow(SW_SHOW);
       ((CFrameWnd*) m_pMainWnd)->SetActiveView(pNewView);
       ((CFrameWnd*) m_pMainWnd)->RecalcLayout();
       pNewView->Invalidate();
       return pActiveView;
   }
}

For more information read CTrueColorToolBar and CMDITabs.

Have fun!