MainMenu.java

package vooga.rts.gui.menus;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.util.Observable;
import vooga.rts.gui.Menu;
import vooga.rts.gui.Window;
import vooga.rts.gui.buttons.MainMenuButton;
import vooga.rts.resourcemanager.ResourceManager;
import util.Location;


public class MainMenu extends Menu {

    public static final String DEFAULT_BGIMAGE_LOCATION = "images/backgrounds/menu_bg.png";
    public BufferedImage myBGImage;
    private Dimension myDefaultButtonDimension = new Dimension(500, 122);

    private Location myDefaultButtonLocation = new Location(678, 500);

    private int ySpacing = 160;

    private double myX;
    private double myY;

    private MainMenuButton mySingleButton;
    private MainMenuButton myMultiButton;

    public MainMenu () {
        super();

        myBGImage =
                ResourceManager.getInstance().<BufferedImage> getFile(DEFAULT_BGIMAGE_LOCATION,
                                                                      BufferedImage.class);
        setBGImage(myBGImage);

        mySingleButton =
                new MainMenuButton("Single Player", myDefaultButtonDimension,
                                   myDefaultButtonLocation, 0);
        setScaledButton(mySingleButton);

        addButton(mySingleButton);

        myMultiButton =
                new MainMenuButton("Multi Player", myDefaultButtonDimension,
                                   new Location(myDefaultButtonLocation.getX(),
                                                (myDefaultButtonLocation.getY() + ySpacing)), 1);

        setScaledButton(myMultiButton);

        addButton(myMultiButton);
    }

    public void setScaledButton (MainMenuButton b) {
        myX = Window.D_X;
        myY = Window.D_Y;
        double xFactor = myX / myBGImage.getWidth();
        double yFactor = myY / myBGImage.getHeight();
        b.setSize(new Dimension((int) (b.getSize().getWidth() * xFactor),
                                (int) (b.getSize().getHeight() * yFactor)));

        b.setPos(new Location((int) (b.getPos().getX() * xFactor),
                              (int) (b.getPos().getY() * yFactor)));
    }

    @Override
    public void paint (Graphics2D pen) {

        super.paint(pen);
        pen.setFont(new Font("Helvetica", Font.BOLD, 100));
        pen.setColor(Color.white);
        pen.drawString("The Vooga RTS Game", 150, 150);

    }
    
    @Override
    public void update(Observable o, Object a) {
        if (o instanceof MainMenuButton) {
            setChanged();
            int s = (Integer) a;
            notifyObservers(s);
        }
    }
}