polygon.addPoint(width - insets.right, y + BOX - 1);
polygon.addPoint(width - BOX - insets.right, y);
g2d.fillPolygon(polygon);
} else if (horizontal instanceof Bilateral) {
x = ((Bilateral) horizontal).getLeading();
g2d.drawLine(insets.left, y, insets.left + x, y);
Polygon polygon = new Polygon();
polygon.addPoint(insets.left, y - BOX + 1);
polygon.addPoint(insets.left, y + BOX);
polygon.addPoint(insets.left + BOX, y);
g2d.fillPolygon(polygon);