private void paintBorder(Graphics g, Rectangle cellRect, int row, int column) {
if (grid.getSpanModel().isCellSpan(row, column)) {
CellSpan span = grid.getSpanModel().getSpanOver(row, column);
row = span.getRow();
column = span.getColumn();
}
// Paint border
javax.swing.border.Border border = grid.getStyleModel().getCellStyle(row, column).getBorder();
Insets borderInsets = border.getBorderInsets(grid);
Rectangle borderRect = new Rectangle(cellRect);
int topOffset = (borderInsets.top >> 1);
int leftOffset = (borderInsets.left >> 1);
int bottomOffset = (borderInsets.bottom / 3) + topOffset;
int rightOffset = (borderInsets.right / 3) + leftOffset;
borderRect.x -= leftOffset;
borderRect.y -= topOffset;
borderRect.width += rightOffset;
borderRect.height += bottomOffset;
border.paintBorder(grid, g, borderRect.x, borderRect.y, borderRect.width, borderRect.height);
}
