internal void HandleWMNotify(ref Message m)
{
uint pos = Win32Declarations.GetMessagePos();
Point pt = new Point(Win32Declarations.LOWORD(pos), Win32Declarations.HIWORD(pos));
pt = _ownerControl.PointToClient(pt);
NMHDR nmhdr = (NMHDR)m.GetLParam(typeof(NMHDR));
if (nmhdr.code == Win32Declarations.TTN_NEEDTEXTW)
{
NMTTDISPINFOW dispInfo = (NMTTDISPINFOW)m.GetLParam(typeof(NMTTDISPINFOW));
_lastToolTipNode = _ownerControl.GetNodeAt(pt);
_lastToolTipColumn = _ownerControl.GetColumnAt(pt);
string tooltip = null;
if (_lastToolTipColumn != null && _lastToolTipNode != null)
{
Rectangle rc = _ownerControl.GetItemBounds(_lastToolTipNode, _lastToolTipColumn);
_lastNeedPlace = true;
tooltip = _lastToolTipColumn.GetToolTip(_lastToolTipNode, rc, ref _lastNeedPlace);
_lastItemShowRect = rc;
}
if (tooltip == null || tooltip.Length == 0)
{
dispInfo.szText = "";
dispInfo.lpszText = IntPtr.Zero;
}
else
{
dispInfo.lpszText = _toolTipPool.PinString(tooltip);
}
Marshal.StructureToPtr(dispInfo, m.LParam, false);
}
else if (nmhdr.code == Win32Declarations.TTN_SHOW && _lastNeedPlace)
{
Rectangle scItemShowRect = _ownerControl.RectangleToScreen(_lastItemShowRect);
RECT rc = Win32Declarations.RectangleToRECT(scItemShowRect);
Win32Declarations.SendMessage(Handle, (LVM)Win32Declarations.TTM_ADJUSTRECT,
1, ref rc);
Win32Declarations.SetWindowPos(Handle, IntPtr.Zero, rc.left, rc.top, 0, 0,
Win32Declarations.SWP_NOSIZE | Win32Declarations.SWP_NOZORDER | Win32Declarations.SWP_NOACTIVATE);
m.Result = (IntPtr)1;
}
}
