This is the solution to step 2 of the Stanford CS106A Breakout game assignment, creating a paddle and making it track with the mouse.

BreakoutCreatePaddle

//adding individual paddle object
	private GRect paddle;
	private double lastX;
	
	//paddle set-up
	private void drawPaddle() {
		//starting the paddle in the middle of the screen
		double x = getWidth()/2 - PADDLE_WIDTH/2; 
		//the paddle height stays consistent throughout the game
		//need to make sure to subtract the PADDLE_HEIGHT, 
		//since the rectangle gets drawn from the top left corner
		double y = getHeight() - PADDLE_Y_OFFSET - PADDLE_HEIGHT;
		paddle = new GRect (x, y, PADDLE_WIDTH, PADDLE_HEIGHT);
		paddle.setFilled(true);
		add (paddle);
		addMouseListeners();
	}
	
	//making the mouse track the paddle
	public void mouseMoved(MouseEvent e) {
		lastX = e.getX();
		/* The mouse tracks the middle point of the paddle. 
		 * If the middle point of the paddle is between half paddle width of the screen
		 * and half a paddle width before the end of the screen, 
		 * the x location of the paddle is set at where the mouse is minus half a paddle's width, 
		 * and the height remains the same
		 */
		if ((e.getX() < getWidth() - PADDLE_WIDTH/2) && (e.getX() > PADDLE_WIDTH/2)) {
			paddle.setLocation(lastX - PADDLE_WIDTH/2, getHeight() - PADDLE_Y_OFFSET - PADDLE_HEIGHT);
		}
		
	}