MFC ribbon home button closes app with double click - c++

Question

I've faced with strange behaviour of a home ribbon button.
I've created standard MFC application in Visual Studio 2010 with Office template that has a ribbon control. But if I double click on the Home ribbon button at the upper position the application is closed.
Could you please tell me if it is standard MFC application handlers behaviour and how I can change it?
I've looked at Prevent double click on MFC-Dialog button but couldn't apply it to my case (more clearly - I don't know how to add double click handler to a ribbon home button).

Answer 1

CMFCRibbonApplicationButton is not derived from CWnd so cannot handle WM_LBUTTONDBLCLK message.
One solution is to derive from CMFCRibbonBar.
class CCustomRibbonBar : public CMFCRibbonBar
{
// ...
protected:
DECLARE_MESSAGE_MAP()
afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
};
BEGIN_MESSAGE_MAP(CCustomRibbonBar, CMFCRibbonBar)
ON_WM_LBUTTONDBLCLK()
END_MESSAGE_MAP()
void CCustomRibbonBar::OnLButtonDblClk(UINT nFlags, CPoint point)
{
CMFCRibbonBaseElement* pHit = HitTest(point);
if (pHit->IsKindOf(RUNTIME_CLASS(CMFCRibbonApplicationButton)))
{
// the user double-clicked in the application button
// do what you want here but do not call CMFCRibbonBar::OnLButtonDblClk
return;
}
CMFCRibbonBar::OnLButtonDblClk(nFlags, point);
}
Another solution: override PreTranslateMessage in CMainFrame class;
BOOL CMainFrame::PreTranslateMessage(MSG* pMsg)
{
if ((WM_LBUTTONDBLCLK == pMsg->message) && (pMsg->hwnd == m_wndRibbonBar))
{
CPoint point(pMsg->pt);
m_wndRibbonBar.ScreenToClient(&point);
CMFCRibbonBaseElement* pHit = m_wndRibbonBar.HitTest(point);
if (pHit && pHit->IsKindOf(RUNTIME_CLASS(CMFCRibbonApplicationButton)))
{
// do what you want but do not call CMDIFrameWndEx::PreTranslateMessage
return TRUE; // no further dispatch
}
}
return CMDIFrameWndEx::PreTranslateMessage(pMsg);
}

Answer 2

Derive your own derived class of CMFCRibbonApplicationButton.
Create a message handler for CMFCRibbonApplicationButton::OnLButtonDblClk
Provide your own implementation of what you want to do on the double click. If nothing should happen, just leave the body empty.
In your CMainFrame you find a definition of CMFCRibbonApplicationButton m_MainButton. Replace the class name with your implementation.