public void highlightNode(IFigure nodeFigure) {
		this.numberOfNodes--;
		int highlightNodePosition = getHighlightNodePosition();
		this.numberOfHighlightedNodes++;
		this.getChildren().remove(nodeFigure);
		this.getChildren().add(highlightNodePosition, nodeFigure);
		this.invalidate();
		this.repaint();
	}

figure.addMouseMotionListener(new MouseMotionListener.Stub() {

	@Override
	public void mouseEntered(MouseEvent me) {
		final IFigure figure = (IFigure) me.getSource();
		((LineBorder) figure.getBorder()).setColor(ColorConstants.blue);
		figure.repaint();
	}

	@Override
	public void mouseExited(MouseEvent me) {
		final IFigure figure = (IFigure) me.getSource();
		((LineBorder) figure.getBorder()).setColor(ColorConstants.black);
		figure.repaint();
	}
			
});