Small HitTest Issue with CXTPTabWorkspace

The CXTPTabWorkspace control does not exclude the button region from the tab hit test. This makes a partial tab displayed under the button area show as Hovering over when the mouse is in the button area. Also allows you to Drag a tab when starting the drag in the button area.

Solution:

Add protected int m_nButtonWidth member to CXTPTabWorkspace. In paint manager DrawTabControlXXXXX functions at the top of each function clear this variable to 0 and after caclulating the nButtonWidth local variable assign the value to pCtrlTab->m_nButtonWidth. In every style of paint manager DrawTabControlXXXX.

Change HitTest to exclude that area from a valid tab button area.

int CXTPTabWorkspace::HitTest(CPoint point)
{
    CRect rc;
    GetClientRect(&rc);
    rc.right -= m_nButtonWidth;
    if (rc.PtInRect(point))
    {
        for (int i = 0; i < m_arrTab.GetSize(); i++)
        {
             if (m_arrTab.rcItem.PtInRect(point))
             {
                 return i;
             }
        }
    }
    return -1;
}

Add the same wrapper in CXTPTabWorkspace::OnMouseMove

void CXTPTabWorkspace::OnMouseMove(UINT nFlags, CPoint point)
{
    CRect rc;
    GetClientRect(&rc);
    rc.right -= m_nButtonWidth;
    if (rc.PtInRect(point))
    {
        if (m_nItemTracking != -1)
        {
           . . .
        }
    }
    else
    {
        if (TRUE)//if (m_dwStyle & CBRS_ALIGN_TOP)
        {
             m_btnClose.CheckForMouseOver(this, point);
             m_btnLeft.CheckForMouseOver(this, point);
             m_btnRight.CheckForMouseOver(this, point);
        }
    }
    HighlightFocused();
    CWnd::OnMouseMove(nFlags, point);
}

The tabs will stop seeing the mouse in the button area as over the tab. Someone who is more familiar with the toolkit should review this fix. I could have easily missed something critical.