package games;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

/// Base class for all game elements.
public abstract class Visible implements Cloneable {
    private int _x;
    private int _y;

    // Make clone() public without a not-supported exception
    // (_all_ Visibles are cloneable)    
    public Object clone() {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            // Should never happen:
            throw new InternalError(e.toString()); 
        }
    }

    /// Draws the Visible on the given graphics context.
    public abstract void draw(Graphics g);

    /// Does any automatic movement/periodic action for the Visible.
    /// Returns true iff Visible should remain in the Game.
    public boolean doAction(Game g) {return true;}

    /// Moves the Visible to a specific point
    public void moveTo(int x, int y) {_x = x; _y = y;}

    /// Retrieve X coordinate of Visible
    public int getX() {return _x;}

    /// Retrieve Y coordinate of Visible
    public int getY() {return _y;}
}