Exception while sizing splitter window

I am creating horizondal splitter window like this.

     if(!m_wndSplitter.CreateStatic(this, 2, 1))
     {
          TRACE(_T("Failed to CreateStaticSplitter\n"));
          return FALSE;
     }
     
     if(!m_wndSplitter.CreateView(0, 0,
          RUNTIME_CLASS(CView1), CSize(0, 0), pContext))
     {
          TRACE(_T("Failed to create third pane\n"));
          return FALSE;
     }

     // CResultView must be the last in the creation process.
     // There can be only one CRichEditDoc per CRichEditView
     if(!m_wndSplitter.CreateView(1, 0,
          RUNTIME_CLASS(CView2), CSize(0, 0), pContext))
     {
          TRACE(_T("Failed to create first pane\n"));
          return FALSE;
     }
     return TRUE;
--
The following is the code in the onsize event
--
          CRect rect;
          GetClientRect(&rect);          
          int i = rect.Height();
          m_wndSplitter.SetRowInfo(0, rect.Height()/2, 0);
          CMDIChildWnd::OnSize(nType, cx, cy);    

An unhandled exception occurs in the SetRowInfo line. Please help
karthik1979Asked:
Who is Participating?
 
ZoppoConnect With a Mentor Commented:
hmm ... maybe this handler even is called while creation
of the splitter before the row/cols are allocated.

Maybe best would be to use a flag like:

// add a flag to the CChildFrame header
...
   BOOL m_bInitialized;
...
// and set it to FALSE in CChildFrame::CChildFrame(...)

// then in OnCreate simply set it to TRUE after everything
// is ok
  if(!m_wndSplitter.CreateStatic(this, 2, 1))
    {
         TRACE(_T("Failed to CreateStaticSplitter\n"));
         return FALSE;
    }
     
    if(!m_wndSplitter.CreateView(0, 0,
         RUNTIME_CLASS(CView1), CSize(0, 0), pContext))
    {
         TRACE(_T("Failed to create third pane\n"));
         return FALSE;
    }

    // CResultView must be the last in the creation process.
    // There can be only one CRichEditDoc per CRichEditView
    if(!m_wndSplitter.CreateView(1, 0,
         RUNTIME_CLASS(CView2), CSize(0, 0), pContext))
    {
         TRACE(_T("Failed to create first pane\n"));
         return FALSE;
    }

// here!!!
    m_bInitialized = TRUE;

    return TRUE;

// and in OnSize something like:

if ( m_bInitialized )
{
 CRect rect;
 GetClientRect(&rect);          
 int i = rect.Height();
 m_wndSplitter.SetRowInfo(0, rect.Height()/2, 0);
}
CMDIChildWnd::OnSize(nType, cx, cy);    


hope that helps,

ZOPPO
0
 
ZoppoCommented:
Hi karthik1979,

a problem with OnSize is often that it is called during
creation of the frame window before everything else is
created completely.

You should somehow check if the creation of the splitter
and the view is completed, either by using a flag which
you set after the view is created or by use of ::IsWindow,
i.e.

if ( m_wndSplitter.m_hWnd != NULL && ::IsWindow( m_wndSplitter.m_hWnd )
{
 m_wndSplitter.SetRowInfo(...);
}

hope that helps,

ZOPPO
0
 
karthik1979Author Commented:
Not working :((
0
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karthik1979Author Commented:
Cool! That worked. Thanks.
0
 
karthik1979Author Commented:
Thats cool!
0
 
ZoppoCommented:
You're welcome.

have a nice day,

regards,

ZOPPO
0
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