Merge branch 'feature/client/make-input-field-buttons-interactive' into 'main'

Create GUI window and establish connection to server

See merge request fdai7332/java-chat!2

src/main/java/ChatClient.java

@@ -1,12 +1,76 @@
 import javax.swing.*;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.io.IOException;
+import java.net.Socket;
 
-public class ChatClient {
+public class ChatClient extends JFrame implements KeyListener {
     private String address;
-    public ChatClient() {
+    private int port;
+    private Socket connectionToServer;
+
+    // GUI
+    private JTextArea outputTextArea;
+    private JTextField inputTextField;
+
+    public ChatClient(int port) {
+        super("Chat");
+        this.port = port;
         address = JOptionPane.showInputDialog("bitte IP-Adresse");
+        
+        if (address != null) {
+            receiveMessages();
+        }
+    }
+
+    private void initGui() {
+        outputTextArea = new JTextArea();
+        outputTextArea.setEditable(false);
+        outputTextArea.setBorder(BorderFactory.createTitledBorder("Chat"));
+
+        inputTextField = new JTextField();
+        inputTextField.setBorder(BorderFactory.createTitledBorder("Nachricht eingeben"));
+        inputTextField.addKeyListener(this);
+
+        add(outputTextArea, BorderLayout.CENTER);
+        add(inputTextField, BorderLayout.SOUTH);
+
+        setVisible(true);
+        setSize(800, 600);
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+    }
+    private void receiveMessages() {
+        try {
+            connectionToServer = new Socket(address, port);
+            initGui();
+        } catch (Exception e) {
+            JOptionPane.showMessageDialog(null, "Verbindung zum Server \"" + address + "\" fehlgeschlagen.");
+        }
+    }
+
+    @Override
+    public void keyTyped(KeyEvent e) {
+
+    }
+
+    @Override
+    public void keyPressed(KeyEvent e) {
+        if (e.getKeyCode() == KeyEvent.VK_ENTER) {
+            String message = inputTextField.getText();
+            if (!message.isEmpty()) {
+                // Senden die Nachricht an Server, wenn der erstellt wird
+                inputTextField.setText("");
+            }
+        }
+    }
+
+    @Override
+    public void keyReleased(KeyEvent e) {
+
     }
 
     public static void main(String[] args) {
-        new ChatClient();
+        new ChatClient(3141);
     }
 }