very first and last commit of lab10

.idea/encodings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
+</project>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_10" default="false" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/GUI.iml" filepath="$PROJECT_DIR$/GUI.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

GUI.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

src/ChatArea.java

+import javax.swing.*;
+import java.awt.*;
+
+public class ChatArea extends JTextArea {
+    private static final int ROWS = 10 , COLUMN = 30;
+    public ChatArea(){
+        super(ROWS , COLUMN);
+        this.setEditable(false);
+        this.setLineWrap(true);
+        setVisible(true);
+    }
+    public void addMessage(String userName , String Message){
+        this.append(userName + " : " + Message + "\n");
+    }
+}

src/ChatRoomGUI.java

+import javax.swing.*;
+import javax.swing.border.EtchedBorder;
+import java.awt.*;
+
+public class ChatRoomGUI extends JFrame {
+    private final String WINDOWS_TITLE = "AUT Chat Room";
+    private final int WIDTH = 500, HEIGHT = 500;
+    private final int X = 100, Y = 100;
+    private ChatArea chatBox = new ChatArea();
+    private JPanel users = new JPanel();
+    private ParticipantArea user = new ParticipantArea();
+    private MessageArea messageArea = new MessageArea();
+    private JPanel msgArea = new JPanel();
+    public ChatRoomGUI(){
+        super();
+        this.setTitle(WINDOWS_TITLE);
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        this.setSize(WIDTH, HEIGHT);
+        this.setLocation(X, Y);
+        this.add(new JScrollPane().add(chatBox) ,BorderLayout.CENTER );
+        chatBox.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.RAISED));
+        users.setLayout(new BorderLayout());
+        users.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.RAISED));
+        users.add(user.getLabel() , BorderLayout.PAGE_START);
+        users.add(user.getList() , BorderLayout.CENTER);
+        this.add(users , BorderLayout.WEST);
+        msgArea.setLayout(new BorderLayout());
+        msgArea.add(new JScrollPane().add(messageArea) , BorderLayout.CENTER);
+        msgArea.add(messageArea.getBtn() , BorderLayout.EAST);
+        this.add(msgArea , BorderLayout.PAGE_END);
+        users.setVisible(true);
+        this.setVisible(true);
+    }
+    public void addNewMessage(String name , String message){
+        chatBox.addMessage(name , message);
+    }
+    public void addNewParticipant(String name){
+        user.addUser(name);
+    }
+    public Boolean removeParticipant(String name){
+        if(user.getListOfUsers().contains(name)){
+            user.getListOfUsers().removeElement(name);
+            return true;
+        }
+        else{
+            return false;
+        }
+    }
+}

src/Main.java

+public class Main {
+    public static void main(String[] args) {
+        ChatRoomGUI chatRoom = new ChatRoomGUI();
+        chatRoom.addNewParticipant("Milad");
+        chatRoom.addNewParticipant("Ali");
+        chatRoom.addNewParticipant("Taghi");
+        chatRoom.addNewParticipant("Naghi");
+        chatRoom.addNewMessage("Milad" , "Hello Ali");
+        chatRoom.addNewMessage("Ali" , "Hello Taghi");
+        chatRoom.addNewMessage("Taghi" , "Hello Naghi");
+        chatRoom.addNewMessage("Naghi" , "Bye");
+        UsernameFrame user = new UsernameFrame();
+    }
+}

src/MessageArea.java

+import javax.swing.*;
+
+public class MessageArea extends JTextField {
+    private JButton btn;
+    private final static String BTN_TXT = "Send";
+    public MessageArea(){
+        super();
+        btn = new JButton(BTN_TXT);
+        this.setEditable(true);
+        this.setVisible(true);
+    }
+
+    public JButton getBtn() {
+        return btn;
+    }
+}

src/ParticipantArea.java

+import javax.swing.*;
+
+public class ParticipantArea extends JList {
+    private final static String LBL_TXT = "Online People:  ";
+    private JLabel label;
+    private DefaultListModel<String> listOfUsers = new DefaultListModel<>();
+    private JList<String> list = new JList<>(listOfUsers);
+    public ParticipantArea(){
+        label = new JLabel(LBL_TXT);
+        this.setVisible(true);
+    }
+
+    public JLabel getLabel() {
+        return label;
+    }
+
+    public JList<String> getList() {
+        return list;
+    }
+
+    public void addUser(String name){
+        listOfUsers.addElement(name);
+    }
+
+    public DefaultListModel<String> getListOfUsers() {
+        return listOfUsers;
+    }
+}

src/UsernameFrame.java

+import javax.swing.*;
+import java.awt.*;
+
+public class UsernameFrame extends JFrame {
+    public static final String BTN_TXT = " Start Chatting ...";
+    public static final String LABEL_TXT = " Choose Your UserName  ";
+    private static final int WIDTH = 300, HEIGHT = 100;
+    JTextField textField;
+    JButton btn;
+    public UsernameFrame() throws HeadlessException {
+        super();
+        this.setLayout(new BorderLayout());
+        JLabel label = new JLabel("Choose Your UserName");
+        add(label , BorderLayout.PAGE_START);
+        textField = new JTextField();
+        add(textField , BorderLayout.CENTER);
+        btn = new JButton(LABEL_TXT);
+        add(btn , BorderLayout.PAGE_END);
+        setSize(WIDTH , HEIGHT);
+        setVisible(true);
+    }
+
+}