JoinGameScreen.java

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package micropolisj.gui;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.rmi.RemoteException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;

import micropolisj.network.ClientMicropolis;

public class JoinGameScreen extends JFrame implements ActionListener {
        private JButton loginBtn;
        private JTextField textfield;

        public JoinGameScreen() {
                super("Join game");

                textfield = new JTextField("IPv4 address");
                loginBtn = new JButton("Login");

                add(textfield);
                add(loginBtn);

                setLayout(new FlowLayout());

                textfield.addKeyListener(new KeyListener() {
                        @Override
                        public void keyTyped(KeyEvent e) {
                                if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                                        joinGame();
                                }
                        }

                        @Override
                        public void keyReleased(KeyEvent e) {
                        }

                        @Override
                        public void keyPressed(KeyEvent e) {
                                if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                                        joinGame();
                                }
                        }
                });
                loginBtn.addActionListener(this);
                pack();

                // center window
                setLocationRelativeTo(null);
                setVisible(true);
        }

        @Override
        public void actionPerformed(ActionEvent ev) {
                joinGame();
        }

        private void joinGame() {
                setVisible(false);
                try {
                        MainWindow win = new MainWindow(new ClientMicropolis(textfield.getText()));
                        win.setVisible(true);
                }
                catch(RemoteException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }
                closeThis();
        }

        private void closeThis() {
                setVisible(false);
                dispose();
        }
}