CControlBar

I would like to derive a simple bar from CControlbar
that will be abale to dock and float and will recieve WM_PAINT but all i want it to be is grayh with out any buttons cause i want to create my own bars (for examples
the IE3.0 or the OFFICE97 bars)
omriAsked:
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jrudd010197Commented:
You won't be able to use Class Wizard but you can use the generic CWnd option and then do a find/replace on CWnd with CControlBar.  Now a basic bar must handle OnUpdateCmdUI.  This is a pure virtual function.  The easiest way to handle this function is just to create an instance of CCmdUI fill in its members and call CWnd::OnCmdMsg.  Another function you need to code is the virtual function CalcFixedLayout.  This is called when the frame needs to know how much client space it has to give up so the bar will Dock.  And the last thing you need to know that isn't covered in the online help is you need to catch the message WM_SIZEPARENT.  This is a private MFC message but it is sent to all CControlBar derived classes.  It is basically just a message to tell you that the parent is sizing itself and you better be ready to have yourself sized to.  Here is how you would handle it....

LRESULT CMyBar::OnSizeParent( WPARAM wParam, LPARAM lParam )
{
AFX_SIZEPARENTPARAMS* pLayout = reinterpret_cast<AFX_SIZEPARENTPARAMS*>(lParam);

      m_cxAvailable = CRect(pLayout->rect).Width();

      return CControlBar::OnSizeParent(wParam,lParam);
}

To handle the other messages is simple.  Since it is a CWnd derived class as well...you can just use the Wizard bar or Class Wizard to add handlers for OnPaint, OnEraseBkgnd, etc.  I recommend you look through the source of CStatusBar and CToolBar when you get ready to add your own controls ( like the Rebar ).

Hope this helps...

If you want a full ( very very simple ) example let me know.  I'll post it on the web somewhere.

Justin
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System Programming

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