Refactor MainGui to use callback for game start

schach/src/main/java/de/hs_mannheim/informatik/chess/main/Main.java

@@ -8,10 +8,12 @@ import de.hs_mannheim.informatik.chess.view.MainGui;
 public class Main{
 	
     public static void main( String[] args ){
-    	new MainGui();
+    	new MainGui(() -> {
+            //Wenn "Normal Modus" gedrückt wird
             GameGui gui = new GameGui();
             ChessEngine engine = new ChessEngine();
             new Controller(gui, engine);
+        });
 
     }
 }

schach/src/main/java/de/hs_mannheim/informatik/chess/view/MainGui.java

@@ -1,5 +1,78 @@
 package de.hs_mannheim.informatik.chess.view;
 
+import java.awt.*;
+import javax.swing.*;
+
 public class MainGui {
 
+    private JFrame frame;
+    private Runnable onStartGame;
+    
+    public MainGui(Runnable onStartGame) {
+    	this.onStartGame = onStartGame;
+    	
+        frame = new JFrame("Chess - Hauptmenü");
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setSize(800, 600);
+        frame.setLocationRelativeTo(null);
+
+        //Haupt-Panel mit GridBagLayout
+        JPanel mainPanel = new JPanel(new GridBagLayout());
+        mainPanel.setBackground(new Color(0xe0e1dd));
+
+        GridBagConstraints gbc = new GridBagConstraints();
+        gbc.gridx = 0;
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.insets = new Insets(15, 0, 15, 0);
+
+        //Title
+        JLabel title = new JLabel("Chess", SwingConstants.CENTER);
+        title.setFont(new Font("Serif", Font.BOLD, 70));
+        title.setForeground(new Color(0x1b263b));
+        gbc.gridy = 0;
+        gbc.ipady = 50; 
+        mainPanel.add(title, gbc);
+
+        //Abstand nach unten
+        gbc.gridy = 1;
+        gbc.ipady = 15;
+        mainPanel.add(Box.createRigidArea(new Dimension(0, 60)), gbc);
+
+        //Buttons
+        JButton btnMode1 = new JButton("Normal Modus");
+        JButton btnMode2 = new JButton("Modus 2 (coming soon)");
+        JButton btnMode3 = new JButton("Modus 3 (coming soon)");
+
+        styleButton(btnMode1);
+        styleButton(btnMode2);
+        styleButton(btnMode3);
+
+        gbc.gridy = 2; gbc.ipady = 25;
+        mainPanel.add(btnMode1, gbc);
+
+        gbc.gridy = 3;
+        mainPanel.add(btnMode2, gbc);
+
+        gbc.gridy = 4;
+        mainPanel.add(btnMode3, gbc);
+
+        frame.add(mainPanel);
+        frame.setVisible(true);
+
+        //Button ActionListener für "Normal Modus"
+        btnMode1.addActionListener(e -> {
+            frame.dispose(); // Hauptmenü schließen
+            onStartGame.run(); // **Ruft den Callback auf**
+        });
+    }
+
+    // Helper für Button Styling
+    private void styleButton(JButton btn) {
+        btn.setFont(new Font("Serif", Font.BOLD, 30));
+        btn.setBackground(new Color(0x778da9));
+        btn.setForeground(Color.WHITE);
+        btn.setFocusPainted(false);
+        btn.setBorder(BorderFactory.createEmptyBorder(10, 40, 10, 40));
+        btn.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
+    }
 }