source: tmcsimulator/trunk/src/tmcsim/client/cadclientgui/screens/Login.java @ 532

package tmcsim.client.cadclientgui.screens;



import java.awt.BorderLayout;

import java.awt.Color;

import static java.awt.Component.LEFT_ALIGNMENT;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Scanner;

import java.util.Vector;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.imageio.ImageIO;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.SwingConstants;



/**

 * This class contains the view and controller for the Login screen. The view

 * was not built using a GUI builder plug-in (but may want to consider doing so

 * in the future), and the controller uses listeners to control how the view and

 * data act.

 *

 * @author Vincent

 */

public class Login extends JFrame

{

    private Box login;

    private JComboBox<String> userNameCombo;

    private JTextField passwordField;

    public static String kNamePrompt = "Enter your name";

    /** a list of student names that will be displayed on the login screen */

    private Vector<String> students;

    

    public Login(String studentNamesFile)

    {

        readNamesFile(studentNamesFile);

        initView();

    }



    /** 

     * A list of student names is read from a file.  The intent is to allow the

     * system operators to customize the login display for each training session

     * with the names of participants in that training. 

     * @param studentNamesFile the full path to a text file of student names

     * @author jdalbey  ticket #206

     */

    private void readNamesFile(String studentNamesFile)

    {

        FileInputStream fis = null;

        try {

            // Prepare an input stream from the names file

            fis = new FileInputStream(studentNamesFile);

            // Scan the names into a string

            Scanner s = new Scanner(fis).useDelimiter("\\A");

            String out = s.next();

            // split string into an array

            String[] results = out.split("\\n");

            // Initialize the student name list

            students = new Vector();

            // Make sure to truncate names before putting in list

            for (String name: results)

            {

                String truncName = name.trim();

                // Limit name length so it fits in the combo box

                if (truncName.length() > 26)

                {

                    truncName = truncName.substring(0,25);

                }

                // Add the validated name to the list of students

                students.add(truncName);

            }

            // Append the default name 

            students.add("Anonymous Trainee");

        } catch (FileNotFoundException ex) {

            Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);

        } finally {

            try {

                fis.close();

            } catch (IOException ex) {

                Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);

            }

        }

    }

    private ActionListener newEnterActionListener()

    {

        return new ActionListener()

        {

            public void actionPerformed(ActionEvent e)

            {

                setVisible(false);

                // Extract the selected student name from the combo box

                String userEntry = (String) userNameCombo.getSelectedItem();

                ScreenManager.setUserName(userEntry);

                ScreenManager.openCADMenu();

                ScreenManager.openAssignedIncidents();

                ScreenManager.openUnitStatus();

                ScreenManager.openPendingIncidents();

                ScreenManager.openPowerlineUI();

                // a secret password allows special permission

                if (!passwordField.getText().equals("Dispatcher"))

                {

                    ScreenManager.setDispatcherAuthority(false);

                }

            }

        };

    }



    private ActionListener newExitActionListener()

    {

        return new ActionListener()

        {

            public void actionPerformed(ActionEvent e)

            {

                System.exit(0);

            }

        };

    }



    private void initView()

    {

        // create a combo box containing the student names

        userNameCombo = new JComboBox<String>(students);

        // Create a scrollbar after ten names

        userNameCombo.setMaximumRowCount(10);

        userNameCombo.setForeground(Color.BLUE);

        userNameCombo.setFont(new Font("Arial", Font.BOLD, 14));

        

        login = new Box(BoxLayout.Y_AXIS);

        login.setAlignmentX(LEFT_ALIGNMENT);

        JPanel whiteBackground = new JPanel();

        whiteBackground.setLayout(new BorderLayout());

        whiteBackground.setAlignmentX(LEFT_ALIGNMENT);

        whiteBackground.setBackground(Color.WHITE);

        whiteBackground.setMaximumSize(new Dimension(750, 150));

        whiteBackground.setMinimumSize(new Dimension(750, 150));

        whiteBackground.setPreferredSize(new Dimension(750, 150));

        // Add TriTech banner to top of screen (ticket #205)

        try {

            BufferedImage myPicture = ImageIO.read(new File("images/TritechLoginBanner.png"));

            JLabel picLabel = new JLabel(new ImageIcon(myPicture));

            whiteBackground.add(picLabel, BorderLayout.CENTER);

        } catch (IOException ex) {

            Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);

        }

        login.add(whiteBackground);



        JPanel blueBackground = new JPanel();

        blueBackground.setAlignmentX(LEFT_ALIGNMENT);

        blueBackground.setBackground(new Color(50, 150, 200));

        blueBackground.setMaximumSize(new Dimension(750, 350));

        blueBackground.setMinimumSize(new Dimension(750, 350));

        blueBackground.setPreferredSize(new Dimension(750, 350));



        JLabel title = new JLabel();

        // Check if we are running from a jar to put message from manifest into title

        Package clientpkg = Login.class.getPackage();

        String builddate = clientpkg.getImplementationVersion();

        String version = "";

        if (builddate != null)

        {

            version = "          (build " + builddate + ")";

        }

        else // We're running from a dev environment

        {

            version = "           00-00-00 00:00";

        }



        title.setText("Inform CAD 5.3 Patch 5 ");

        title.setHorizontalAlignment(SwingConstants.CENTER);

        title.setFont(new Font("Arial", Font.PLAIN, 22));

        title.setForeground(Color.WHITE);

        title.setMaximumSize(new Dimension(750, 100));

        title.setMinimumSize(new Dimension(750, 100));

        title.setPreferredSize(new Dimension(750, 100));

        blueBackground.add(title);



        JLabel builddateLabel = new JLabel(version);

        builddateLabel.setForeground(Color.WHITE);

        builddateLabel.setHorizontalAlignment(SwingConstants.CENTER);

        blueBackground.add(builddateLabel);



        Box leftBox = new Box(BoxLayout.Y_AXIS);

        leftBox.setMaximumSize(new Dimension(350, 90));

        leftBox.setMinimumSize(new Dimension(350, 90));

        leftBox.setPreferredSize(new Dimension(350, 90));

        leftBox.setAlignmentX(LEFT_ALIGNMENT);



        JLabel userNameLabel = new JLabel("User name ");

        userNameLabel.setForeground(Color.WHITE);

        Box userNameBox = new Box(BoxLayout.X_AXIS);

        userNameBox.setAlignmentX(LEFT_ALIGNMENT);

        userNameBox.add(Box.createHorizontalStrut(10));

        userNameBox.add(userNameLabel);

        userNameBox.add(userNameCombo);

        leftBox.add(userNameBox);



        JLabel passwordLabel = new JLabel("Password  ");

        passwordLabel.setForeground(Color.WHITE);

        passwordField = new JTextField("Not required");

        passwordField.setEnabled(false);

        Box passwordBox = new Box(BoxLayout.X_AXIS);

        passwordBox.setAlignmentX(LEFT_ALIGNMENT);

        passwordBox.add(Box.createHorizontalStrut(10));

        passwordBox.add(passwordLabel);

        passwordBox.add(passwordField);

        leftBox.add(Box.createVerticalStrut(10));

        leftBox.add(passwordBox);



        JButton enter = new JButton("Login");

        enter.addActionListener(newEnterActionListener());

        JButton newPassword = new JButton("New Password");

        newPassword.setEnabled(false);

        JButton exit = new JButton("Exit");

        exit.addActionListener(newExitActionListener());

        JButton selectAll = new JButton("Select All");

        selectAll.setEnabled(false);

        JButton unselectAll = new JButton("Unselect all");

        unselectAll.setEnabled(false);

        Box buttonBox = new Box(BoxLayout.X_AXIS);

        buttonBox.setAlignmentX(LEFT_ALIGNMENT);

        buttonBox.add(Box.createHorizontalStrut(75));

        buttonBox.add(enter);

        buttonBox.add(Box.createHorizontalStrut(20));

        buttonBox.add(newPassword);

        buttonBox.add(Box.createHorizontalStrut(20));

        buttonBox.add(exit);

        buttonBox.add(Box.createHorizontalStrut(125));

        buttonBox.add(selectAll);

        buttonBox.add(Box.createHorizontalStrut(10));

        buttonBox.add(unselectAll);



        Box rightBox = new Box(BoxLayout.Y_AXIS);

        rightBox.setAlignmentX(LEFT_ALIGNMENT);

        rightBox.setMaximumSize(new Dimension(250, 90));

        rightBox.setMinimumSize(new Dimension(250, 90));

        rightBox.setPreferredSize(new Dimension(250, 90));

        JLabel position = new JLabel("Positions:");

        position.setPreferredSize(new Dimension(250, 20));

        position.setMaximumSize(new Dimension(250, 20));

        position.setMinimumSize(new Dimension(250, 20));

        position.setBackground(Color.BLACK);

        position.setHorizontalAlignment(SwingConstants.LEFT);

        position.setForeground(Color.WHITE);

        rightBox.add(position);

        JPanel list = new JPanel();

        rightBox.add(list);



        Box centerBox = new Box(BoxLayout.X_AXIS);

        centerBox.setAlignmentX(LEFT_ALIGNMENT);

        centerBox.add(leftBox);

        centerBox.add(Box.createHorizontalStrut(75));

        centerBox.add(rightBox);

        blueBackground.add(centerBox);

        blueBackground.add(Box.createVerticalStrut(125));

        blueBackground.add(buttonBox);

        login.add(blueBackground);



        getContentPane().add(login);

        setUndecorated(true);

        pack();

        setLocationRelativeTo(null);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

        setVisible(true);

    }

    

    /** Local main for unit testing */

    public static void main(String[] args) 

    {

        new Login("config/student_names.txt");

    }

    

}