Visual Studio MFC dialog application , Press button to clicked

Question

I created a dialog application in Visual Studio MFC.

I create BN_CLICKED function to enable IDC_CHECK1. 

I create DOUBLECLICKED function to other functoin.

When i call DOUBLECLICKED function will call BN_CLICKED function .

Any way to call DOUBLECLICKED function  and don't call BN_CLICKED function .

==============================

void CMyTest1Dlg::DoStaticFunc(int iSelectIndex)
{
BOOL boCState;
boCState = this->m_chk1[iSelectIndex].GetCheck();
this->m_chk1[iSelectIndex].SetCheck(!boCState);
}

void CMyTest1Dlg::OnBnClickedButton1()
{
// TODO: Add your control notification handler code here
DoStaticFunc(0);
}


void CMyTest1Dlg::OnBnDoubleclickedButton1()
{
// TODO: Add your control notification handler code here

// will do another
}

==============================

Answer 1

If you want to receive the BN_DBLCLK notification from a button then you must set the BS_NOTIFY style.

However, note that double clicking the button will send both BN_CLICKED and BN_DBLCLK.

https://docs.microsoft.com/en-us/windows/win32/controls/bn-dblclk

BTW, BN_DOUBLECLICKED is the same as the BN_DBLCLK notification code.

Answer 2

Any way to call DOUBLECLICKED function  and don't call BN_CLICKED function .

Hello,

no, this is not possible. BN_CLICKED is always called first when you double-click a button.

Regards, Guido

Answer 3

Its a bit of a hack, but you can use a timer to avoid handling the BN_CLICK notifcation if it is followed by a BN_DOUBLECLICKED notification.

For example

void CMFCApplication5Dlg::OnClickedButton1()
{
	// TODO: Add your control notification handler code here
	if (!m_bTimer && !m_bDouble)
	{
		SetTimer(42, 500, nullptr);
		m_bTimer = true;
		TRACE(_T("Timer set on BN_CLICKED\n"));
	}
	else
	{
		m_bTimer = false;
		if (!m_bDouble)
			TRACE(_T("Do Single Click Action on reposted notification\n"));
		else
		{
			m_bDouble = false;
			TRACE(_T("Ignore reposted notification\n"));
		}
	}
}

void CMFCApplication5Dlg::OnDoubleclickedButton1()
{
	// TODO: Add your control notification handler code her
	m_bDouble = true;
	TRACE(_T("Do Double Click Action\n"));
}

void CMFCApplication5Dlg::OnTimer(UINT_PTR nIDEvent)
{
	// TODO: Add your message handler code here and/or call default
	KillTimer(nIDEvent);
	// Re-post the BN_CLICKED notification
	PostMessage(WM_COMMAND, MAKEWPARAM(IDC_BUTTON1, BN_CLICKED), (LPARAM)GetDlgItem(IDC_BUTTON1)->GetSafeHwnd());
}

Answer 4

Did you try the timer workaround?