Test ucigame Bongtrop Ball

Bongtrop Ball

import ucigame.*;

public class Pong extends Ucigame
{
    Sprite ball;
    Sprite paddle;
    boolean checkDrag;

    public void setup()
    {
        checkDrag = false;
        window.size(200, 200);
        window.title("Bongtrop Ball");
        framerate(30);

        canvas.background(200, 230, 255);

        ball = makeSprite(getImage("images/ball.gif", 255, 255, 255));

        ball.position(canvas.width()/2 - ball.width()/2,
                      canvas.height()/2 - ball.height()/2);
        ball.motion(0, 4);
    }

    public void draw()
    {
        canvas.clear();
        if (!checkDrag) {
            ball.motion(0, 4, ADD);
        }
        ball.move();
        ball.bounceIfCollidesWith(paddle);
        ball.bounceIfCollidesWith(TOPEDGE, BOTTOMEDGE, LEFTEDGE, RIGHTEDGE);

        ball.draw();
    }
    
    public void onMouseDragged()
	{
		if (mouse.button() == mouse.LEFT)
		{
		    ball.motion(0, 0);
			ball.motion(mouse.Xchange(), mouse.Ychange(), ADDONCE);
			checkDrag = true;
		}
	}
	
	public void onMouseReleased()
	{
	    if (mouse.button() == mouse.LEFT)
	    {
	        checkDrag = false;
	    }
	}
}