loginview.java

ICE3.3.0--聊天程序服务器端demo

// **********************************************************************
//
// Copyright (c) 2003-2008 ZeroC, Inc. All rights reserved.
//
// This copy of Chat Demo is licensed to you under the terms
// described in the CHAT_DEMO_LICENSE file included in this
// distribution.
//
// **********************************************************************

package ChatDemoGUI;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Cursor;
import java.awt.Toolkit;

import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JCheckBox;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JPasswordField;
import javax.swing.JButton;
import javax.swing.BoxLayout;

import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.forms.builder.DefaultFormBuilder;

import java.util.prefs.Preferences;

public class LoginView extends JPanel
{
    LoginView(MainView mainview, Preferences connectionPrefs)
    {
        _mainView = mainview;
        _info = new LoginInfo(connectionPrefs);

        ActionListener loginListener = new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                login();
            }
        };
        _bttLogin.addActionListener(loginListener);

        ActionListener advancedListener = new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                _advancedOptions.setVisible(_chkAdvancedEnabled.isSelected());
            }
        };
        _chkAdvancedEnabled.addActionListener(advancedListener);

        {   // Build the basic login panel.
            FormLayout layout = new FormLayout("center:pref:grow", "pref:grow");
            DefaultFormBuilder builder = new DefaultFormBuilder(layout);
            builder.setDefaultDialogBorder();
            builder.append(new JLabel("Chat Demo"));
            builder.nextLine();
            builder.append(new JLabel("Welcome! You can login with any username / password."));
            builder.append(new JLabel("Username"));
            builder.nextLine();
            builder.append(_txtUsername);
            builder.nextLine();
            builder.append(new JLabel("Password"));
            builder.nextLine();
            builder.append(_txtPassword);
            builder.nextLine();
            builder.append(_chkAdvancedEnabled);
            _directPanel = builder.getPanel();
        }

        {   // Build the adavanced options panel.
            FormLayout layout = new FormLayout("center:pref:grow", "pref:grow");
            DefaultFormBuilder builder = new DefaultFormBuilder(layout);
            builder.append(new JLabel("Host"));
            builder.nextLine();
            builder.append(_txtHost);
            builder.nextLine();
            _advancedOptions = builder.getPanel();
        }

        JPanel actionsPanel = null; // Build a panel for put actions.
        {
            FormLayout layout = new FormLayout("center:3dlu:grow", "pref");
            DefaultFormBuilder builder = new DefaultFormBuilder(layout);
            builder.append(_bttLogin);
            actionsPanel = builder.getPanel();
            _mainView.getRootPane().setDefaultButton(_bttLogin);
        }

        FormLayout layout = new FormLayout("fill:pref:grow", "pref");
        DefaultFormBuilder builder = new DefaultFormBuilder(layout);
        builder.append(_directPanel);
        builder.nextLine();
        builder.append(_advancedOptions);
        builder.nextLine();
        builder.append(actionsPanel);

        _advancedOptions.setVisible(false);
        _txtUsername.setText(_info.username);
        _txtHost.setText(_info.host);

        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        add(builder.getPanel());
    }

    public void setCoordinator(Coordinator coordinator)
    {
        _coordinator = coordinator;
    }

    public void setEnabled(boolean enabled)
    {
        _txtUsername.setEnabled(enabled);
        _txtPassword.setEnabled(enabled);
        _txtHost.setEnabled(enabled);
        _chkAdvancedEnabled.setEnabled(enabled);
        _bttLogin.setEnabled(enabled);
    }

    private void login()
    {
        _coordinator.setState(Coordinator.ClientState.Connecting);
        _info.username = _txtUsername.getText();
        if(_txtPassword.getPassword() != null)
        {
            _info.password = new String(_txtPassword.getPassword());
        }
        _info.host = _txtHost.getText();

        new Thread()
        {
            public void run()
            {
                _coordinator.login(_info);
            }
        }.start();
    }

    public void setConnected(boolean connected)
    {
        setVisible(!connected);
        if(connected)
        {
            _mainView.getRootPane().setDefaultButton(null);
        }
        else
        {
            _mainView.getRootPane().setDefaultButton(_bttLogin);
        }
    }

    private final JPanel _directPanel;
    private final JPanel _advancedOptions;
    private final JTextField _txtUsername = new JTextField(20);
    private final JPasswordField _txtPassword = new JPasswordField(20);
    private final JCheckBox _chkAdvancedEnabled = new JCheckBox("Show advanced options", false);
    private final JTextField _txtHost = new JTextField(20);
    private final JButton _bttLogin = new JButton("Login");
    private final LoginInfo _info;
    private Coordinator _coordinator = null;
    private final MainView _mainView;
};