// EdgeButton.java Copyright (c) 2004 brising.com

import java.awt.Color;
import java.awt.Point;
import java.awt.event.ActionEvent;
import javax.swing.SwingUtilities;

/**
I am a button on the edge of the button matrix.
I generate Photons and display the results of their travels.
*/
public
    class       EdgeButton
    extends     GameButton
    {
// INSTANCE VARIABLES /////////////////////////////////////////////////////////

    Point hpDirection;
    Point hpLocation;

// CONSTRUCTORS ///////////////////////////////////////////////////////////////

    public
        EdgeButton
        (
        Point apLocation,
        Point apDirection
        )
        {
        hpLocation  = apLocation;
        hpDirection = apDirection;
        }

// PUBLIC INSTANCE METHODS ////////////////////////////////////////////////////

    /**
    Fire a Photon.
    */
    public
        void        actionPerformed
        (
        ActionEvent aoActionEvent
        )
        {
        SwingUtilities.invokeLater
            (new Photon
                (hpLocation
                ,hpDirection,
                (GamePanel)getParent())
            );
        }

    /**
    What is my default background color?
    */
    public
        Color       getBackgroundDefault
        (
        )
        {
        return Color.lightGray;
        }

    /**
    How many points do I subtract from the game's score when I change color?
    */
    public
        int         getScore
        (
        )
        {
        return 1;
        }

    /**
    Indicate that a Photon started here.
    */
    public
        void        initiate
        (
        )
        {
        if (hasBackgroundDefault())
            changeScore();
        setBackground(Color.green);
        }

    /**
    Indicate that a Photon stopped here.
    */
    public
        void        terminate
        (
        )
        {
        if (hasBackgroundDefault())
            changeScore();
        setBackground(Color.red);
        }
    }