LeagueInvaders/GamePanel.java at master · mjfre/LeagueInvaders · GitHub

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import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.Timer;
import javax.swing.JPanel;

public class GamePanel extends JPanel implements ActionListener, KeyListener{
	Timer timer;
	GameObject GameObject;
	final int MENU_STATE = 0;
	final int GAME_STATE = 1;
	final int END_STATE = 2;
	int currentState = MENU_STATE;

	public GamePanel() {
		timer = new Timer(1000/60, this);
		//GameObject = new GameObject();
	}

	void startGame() {
		timer.start();
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		//GameObject.update();
		if(currentState == MENU_STATE){
			updateMenuState();
		}
		else if(currentState == GAME_STATE){
			updateGameState();
		}
		else if(currentState == END_STATE){
			updateEndState();
		}

		repaint();
	}

	public void paintComponent(Graphics g){
		//GameObject.draw(g);
		if(currentState == MENU_STATE){
			drawMenuState(g);
		}else if(currentState == GAME_STATE){
			drawGameState(g);
		}else if(currentState == END_STATE){
			drawEndState(g);
		}

	}

	@Override
	public void keyTyped(KeyEvent e) {
		// TODO Auto-generated method stub
		System.out.println("keyTyped");
	}

	@Override
	public void keyPressed(KeyEvent e) {
		// TODO Auto-generated method stub
		System.out.println("keyPressed");
		if(e.getKeyCode()==KeyEvent.VK_ENTER) {
			currentState=currentState+1;
			if(currentState > END_STATE){
				currentState = MENU_STATE;
			}
		}


	}

	@Override
	public void keyReleased(KeyEvent e) {
		// TODO Auto-generated method stub
		System.out.println("keyReleased");
	}

	void updateMenuState() {

	}

	void updateGameState() {

	}

	void updateEndState() {

	}

	void drawMenuState(Graphics g) {
		g.setColor(Color.BLUE);
		g.fillRect(0, 0, LeagueInvaders.WIDTH, LeagueInvaders.HEIGHT);
	}

	void drawGameState(Graphics g){
		g.setColor(Color.BLACK);
		g.fillRect(0, 0, LeagueInvaders.WIDTH, LeagueInvaders.HEIGHT);
	}

	void drawEndState(Graphics g) {
		g.setColor(Color.RED);
		g.fillRect(0, 0, LeagueInvaders.WIDTH, LeagueInvaders.HEIGHT);
	}

}