import objectdraw.*;

/*
 * Basketball with classes.  Demonstrates
 * how to define a new class,
 * and how to construct and use objects of that
 * class.
 * 
 * This is virtually identical to the original 
 * basketball program, except that we create
 * a BBall object instead of a FilledOval to 
 * represent the ball.
 */
public class ClassyBasketBall extends WindowController {

    // dimensions and locations for the hoop
    private static final int HOOP_TOP = 50;
    private static final int HOOP_HEIGHT = 60;
    private static final int HOOP_WIDTH = 100;

    // dimensions and locations for the score display
    private static final int DISPLAY_FONT_SIZE = 16;
    private static final int DISPLAY_LEFT = 100;
    private static final int DISPLAY_TOP = 350;

    // dimensions and locations for the ball
    private static final int BALL_SIZE = 35;
    private static final int BALL_TOP = DISPLAY_TOP - 2 * BALL_SIZE;

    // the Text object which displays the count
    private Text display;

    // the oval that represent the hoop
    private FramedOval hoop;

    // the number of points
    private int score = 0;

    // remembers whether the ball was touched when the button was pressed
    private boolean ballGrabbed;

    // Last position of mouse while dragging
    private Location lastPoint;
    
    // the ball itself
    private BBall ball;

    // initialize the counter and the text message
    public void begin() {

        display = new Text("Take a shot.", DISPLAY_LEFT, DISPLAY_TOP, canvas);
        display.setFontSize(DISPLAY_FONT_SIZE);

        hoop = 
            new FramedOval((canvas.getWidth() - HOOP_WIDTH) / 2,
                           HOOP_TOP, HOOP_WIDTH, HOOP_HEIGHT, canvas);

        ball = 
            new BBall( (canvas.getWidth() - BALL_SIZE) / 2,
                       BALL_TOP, 
                       BALL_SIZE, 
                       canvas);

    }

    public void onMousePress(Location point) {
        lastPoint = point;
        ballGrabbed = ball.contains(point);
    }

    // Move the basketball as the mouse is dragged
    public void onMouseDrag(Location point) {
        if (ballGrabbed) {
            ball.move(point.getX() - lastPoint.getX(),
                      point.getY() - lastPoint.getY());
        }
        lastPoint = point;
    }

    // increment the counter if player scores and update the text
    // appropriately
    public void onMouseRelease(Location point) {
        if (ballGrabbed && hoop.contains(point)) {
            score = score + 2;
            display.setText("You have scored " + score + " points.");
        } else {
            display.setText("WHOOPS!  You Missed.");
        }
        
        ball.moveTo((canvas.getWidth() - BALL_SIZE) / 2,
                    BALL_TOP);
    }

}