LoadingState.java

package vooga.rts.state;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.util.Observer;

import javax.swing.ImageIcon;

import vooga.rts.commands.ClickCommand;
import vooga.rts.commands.Command;
import vooga.rts.gui.Window;
import vooga.rts.resourcemanager.ResourceManager;

/**
 * The state of the game while its loading. Once it is done, a simple click will 
 * advance to the menu state.
 * @author challenherzberg-brovold
 *
 */

public class LoadingState extends SubState {

    AffineTransform myTransform;
    BufferedImage myBGImage;
    ImageIcon myLoadingImage;

    public static final String DEFAULT_BGIMAGE_LOCATION = "images/backgrounds/loading_bg.png";
    public static final String DEFAULT_LOADING_LOCATION = "images/ajax_loader_gray_300.gif";

    private MainState myMain;

    public LoadingState (Observer observer) {
        super(observer);
        if (observer instanceof MainState) {
            myMain = (MainState) observer;
        }
        myBGImage =
                ResourceManager.getInstance().<BufferedImage> getFile(DEFAULT_BGIMAGE_LOCATION,
                                                                      BufferedImage.class);
        myLoadingImage =
                new ImageIcon(ResourceManager.getInstance()
                        .<BufferedImage> getFile(DEFAULT_LOADING_LOCATION, BufferedImage.class));
    }

    @Override
    public void update (double elapsedTime) {
        if (!isLoading()) {
            setChanged();
            notifyObservers();
        }
    }

    @Override
    public void paint (Graphics2D pen) {
        myTransform = new AffineTransform();
        double sx = Window.D_X;
        sx /= myBGImage.getWidth();
        double sy = Window.D_Y;
        sy /= myBGImage.getHeight();
        myTransform.scale(sx, sy);
        pen.drawImage(myBGImage, myTransform, null);
        Rectangle screen = pen.getDeviceConfiguration().getBounds();
        pen.setColor(Color.white);
        pen.setFont(new Font("Georgia", Font.PLAIN, 72));
        pen.drawString("Game is Loading...", 200, 300);
        pen.setFont(new Font("Georgia", Font.PLAIN, 30));
        pen.drawString("Please Wait...", 200, 380);
        if (!isLoading()) {
            pen.setFont(new Font("Georgia", Font.PLAIN, 30));
            pen.drawString("Click to start.", 200, 380);
        }        
    }

    @Override
    public void receiveCommand (Command command) {
        if (command.getMethodName().equals(ClickCommand.LEFT_CLICK)) {
            update(0);
        }
    }

    /**
     * 
     * @return whether or not the game is finished loadings
     */
    private boolean isLoading () {
        return ResourceManager.getInstance().isLoading() || !myMain.isReady();
    }

    @Override
    public void activate () {
        ResourceManager.getInstance().load();        
    }
}