protected boolean handleCellHover(int x, int y)
    {
        boolean superResult = super.handleCellHover(x, y);

        // redo some code from superMethod to display tooltips in column headers
        // when images are shown
        final GridColumn col = getColumn(new Point(x, y));
        final GridItem item = getItem(new Point(x, y));

        if ((col != null)) {
                if (item == null) {
                    if (y < headerHeight) {
                        if (y >= groupHeaderHeight) {
                            // on col header
                            if ((col.getText() != null)
                                    && ((!col.getText().equals("")) && ((col.getColumnGroup() != null) && (!col
                                            .getColumnGroup().getText().equals("General"))))) {
                                showToolTip(item, col, null, new Point(x + 15, y));
                            }

                        }
                    }

                }
        }

        return superResult;
    }