package client.view; import client.Client; import client.service.ChatSender; import client.service.LocalData; import client.view.login.*; import client.view.util.DesignToken; import server.serveice.Wrapper; import javax.swing.*; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; /** * 登录页面，用于完成用户账户登录的功能，作为一个独立的页面，登录完成之后将自动关闭，并开启主界面 */ public class LoginPage extends JFrame { private static volatile LoginPage INSTANCE; // 获取登录页面实例，使用单例模式确保全局唯一性 public static LoginPage get() { if (INSTANCE == null) { synchronized (LoginPage.class) { if (INSTANCE == null) { INSTANCE = new LoginPage(); } } } return INSTANCE; } // 交替展示两个窗口，分别用于进行注册和登录操作。 private SignInView signInView; private SignUpView signUpView; private LoginPage() { setTitle("欢迎来到本地网聊天室！"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setSize(DesignToken.LOGIN_WIDTH, DesignToken.LOGIN_HEIGHT); setLocationRelativeTo(null); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { // 如果链接上了，发出退出信息 if (Client.isConnected()) { ChatSender.addMsg(Wrapper.logoutRequest(LocalData.get().getId())); } super.windowClosing(e); // 如果未登录，则直接退出。 if (LocalData.get().getId().length() == 0) { System.exit(0); } } }); signInView = new SignInView(this); signUpView = new SignUpView(this); // 默认为登录 exchangeToSignInView(); } // 更换到注册界面 public void exchangeToSignUpView() { this.remove(signInView); this.add(signUpView, BorderLayout.CENTER); this.validate(); this.repaint(); } // 更换到登录界面 public void exchangeToSignInView() { this.remove(signUpView); this.add(signInView, BorderLayout.CENTER); this.validate(); this.repaint(); } // 打开主界面，并关闭本界面 public void openMainPage() { // 创建新窗口 MainPage.get().setVisible(true); // 关闭当前窗口 this.dispose(); } public void showMsgDialog(String text) { JDialog inviteDialog = new JDialog(this, "信息", true); inviteDialog.setSize(300, 200); inviteDialog.setLocationRelativeTo(this); // 设置对话框内容 String htmlText = "" + text + ""; JLabel label = new JLabel(htmlText, SwingConstants.CENTER); JButton closeBtn = new JButton("确定"); closeBtn.addActionListener(e -> inviteDialog.dispose()); JPanel panel = new JPanel(new BorderLayout()); JPanel centerPanel = new JPanel(new FlowLayout()); centerPanel.add(label); panel.add(centerPanel, BorderLayout.CENTER); panel.add(closeBtn, BorderLayout.SOUTH); inviteDialog.add(panel); // 显示对话框（会阻塞主窗口交互） inviteDialog.setVisible(true); } }