package ballworld; 

import cs101.lang.Animate; 

/**
 * The Dud object is a very simple implementation of the Ball interface.  
 * Its location changes only in response to user clicks, and its radius
 * is constant at 5. 
 */
public class Dud implements Ball, Animate
{
    private double  x;       // The current X-coordinate of this Ball
    private double  y;       // The current Y-coordinate of this Ball
    private World   myWorld; // The world in which this Ball resides 

    /**
     * Returns current X-coordinate of this Ball.
     */ 
    public double getX() 
    {
	return this.x; 
    }   

    /**
     * Returns current Y-coordinate of this Ball.
     */ 
    public double getY() 
    {
	return this.y; 
    }   

    /**
     * Returns 5. 
     */ 
    public double getRadius() 
    {
	return 5; 
    }   

    /** 
     * Sets the world in which this ball resides to be "theWorld". 
     */
    public void setWorld(World theWorld)
    { 
	this.myWorld = theWorld; 
    } 

    /** 
     * Moves this Ball to the location at which the user clicked. 
     */
    public void userClicked(double atX, double atY) 
    { 
	this.x = atX; 
	this.y = atY; 
    }
 
    /** 
     * If the user typed a 'd', removes this Ball from myWorld.  Otherwise
     * ignores the keypress. 
     */
    public void userTyped(char key) 
    { 
	if (key == 'd')
        {
	    this.myWorld.removeBall(this);
	}
	else
	{
	    // Ignore keypress
	}
    } 

    /** Does nothing. */
    public void act() { } 
}