MFC Add Tooltip for disabled radio button

Question

In MFC (old I know), I am trying to add a Tooltip that appears only when a radio button is disabled.

I am able to show the tooltip with code such as:

m_ToolTip.Create(this);
m_ToolTip.AddTool(GetDlgItem(IDC_RADIOBUTTON), "Tooltip text");
m_ToolTip.Activate(TRUE);

But it does not work when my radio button is disabled, (apparently that is by design)

After some research it appears that I need to override the

PreTranslateMessage()

function to get the ToolTip showing, perhaps tracking when the mouse enters into the control area, but I don't know how to do that.

Any help much appreciated.

Since the window is disabled, you are not going to be able to use tooltips with it. However, you can use GetWindowRect(), translate to a client area rectangle on the dialog, and then add a tool for the space that the window occupies. Look at overrides for CToolTipCtrl::AddTool that take RECT arguments. — Joseph Willcoxson

KungPhoo KungPhoo · Accepted Answer · 2017-12-21T09:31:06

BOOL MyDialog::PreTranslateMessage(MSG* pMsg)
{
    // GF: Fix tooltips on disabled items.
    m_wndCtrl.RelayEvent(pMsg->message, pMsg->wParam, pMsg->lParam);
    m_wndCtrl.UpdateWindow();
    return CDialog::PreTranslateMessage(pMsg);
}

This works for me.

MFC Add Tooltip for disabled radio button

1 Answers