public final void drawArrow(Graphics g) {
			int center = getWidth() >> 1;
			g.setColor(Color.black);
			g.drawLine(center, 0, center, ARROW_LENGTH);
			g.drawLine(center, ARROW_LENGTH, center - 10, ARROW_LENGTH - 10);
			g.drawLine(center, ARROW_LENGTH, center + 10, ARROW_LENGTH - 10);
			g.translate(0, ARROW_LENGTH);
		}