PentrisMainMenu.java

package main;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PentrisMainMenu extends JFrame {

    // Convenience constants
    private static final Font TITLE_FONT   = new Font("Monospaced", Font.BOLD, 36);
    private static final Font BUTTON_FONT  = new Font("Monospaced", Font.PLAIN, 18);
    private static final Dimension BTN_SZ  = new Dimension(160, 40);

    public PentrisMainMenu() {
        super("Pentris – Main Menu");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        //setPreferredSize(new Dimension(1280, 720));
        setResizable(false);

        /* ---------- MAIN CONTENT PANEL ---------- */
        JPanel content = new JPanel();
        content.setBorder(BorderFactory.createEmptyBorder(20, 40, 20, 40));
        content.setLayout(new BoxLayout(content, BoxLayout.Y_AXIS));

        /* ---------- TITLE ---------- */
        JLabel title = new JLabel("Pentris", SwingConstants.CENTER);
        title.setAlignmentX(Component.CENTER_ALIGNMENT);
        title.setFont(TITLE_FONT);
        content.add(title);
        content.add(Box.createRigidArea(new Dimension(0, 30)));   // spacing

        /* ---------- DIFFICULTY RADIO-BUTTONS ---------- */
        JPanel diffPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 15, 0));
        diffPanel.setAlignmentX(Component.CENTER_ALIGNMENT);

        JRadioButton easy   = new JRadioButton("Easy",   true);
        JRadioButton normal = new JRadioButton("Normal");
        JRadioButton hard   = new JRadioButton("Hard");

        ButtonGroup group = new ButtonGroup();
        group.add(easy);
        group.add(normal);
        group.add(hard);

        diffPanel.add(easy);
        diffPanel.add(normal);
        diffPanel.add(hard);

        content.add(diffPanel);
        content.add(Box.createRigidArea(new Dimension(0, 40)));   // spacing

        /* ---------- ACTION BUTTONS ---------- */
        JButton newGameBtn = makeMenuButton("New Game");
        JButton loadGameBtn = makeMenuButton("See saved games");
        JButton exitBtn = makeMenuButton("Exit");

        // Attach simple action handlers (replace with your own logic)
        newGameBtn.addActionListener(e -> {
            String difficulty = getSelectedDifficulty(group, easy, normal, hard);

            Main.launchGame(difficulty);
        });

        loadGameBtn.addActionListener(e -> {
            MainImageLooker.launch();
        });

        exitBtn.addActionListener(e -> System.exit(0));

        // Put the three buttons into a vertically stacked panel
        Box buttonBox = Box.createVerticalBox();
        buttonBox.setAlignmentX(Component.CENTER_ALIGNMENT);
        buttonBox.add(newGameBtn);
        buttonBox.add(Box.createRigidArea(new Dimension(0, 10)));
        buttonBox.add(loadGameBtn);
        buttonBox.add(Box.createRigidArea(new Dimension(0, 10)));
        buttonBox.add(exitBtn);

        content.add(buttonBox);

        /* ---------- FINALISE ---------- */
        getContentPane().add(content);
        pack();                        // size to preferred sizes
        setLocationRelativeTo(null);   // center on screen
        setVisible(true);
    }

    /** Utility to create uniformly styled buttons. */
    private static JButton makeMenuButton(String text) {
        JButton btn = new JButton(text);
        btn.setPreferredSize(BTN_SZ);
        btn.setFont(BUTTON_FONT);
        return btn;
    }

    /** Helper to read which difficulty is chosen. */
    private static String getSelectedDifficulty(ButtonGroup g,
                                                JRadioButton easy,
                                                JRadioButton normal,
                                                JRadioButton hard) {
        if (easy.isSelected())   return "EASY";
        if (normal.isSelected()) return "NORMAL";
        if (hard.isSelected())   return "HARD";
        return "UNKNOWN";
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(PentrisMainMenu::new);
    }
}