// COBOL Programmers Swing With Java - copyright 2005 Doke, Hardgrave, & Johnson
// Chapter 10 - Graphical User Interfaces
// Program to demonstrate GUI w/ menu
// CustomerGUISix.java 1 JAN 05

import javax.swing.*; // import Swing package
import java.awt.*; // import AWT package
import java.awt.event.*; // import AWT Event package

public class CustomerGUISix extends JFrame  // this class inherits methods from the JFrame class
{
    // static variables to hold frame dimensions in pixels
    private static final int WIDTH = 350;
    private static final int HEIGHT = 175;

    // declare instance variables for GUI components
    private JLabel nameLabel, ssnLabel, addressLabel, phoneLabel;
    private JTextField nameTextField, ssnTextField, addressTextField, phoneTextField;
    private JButton acceptB, clearB;

    // declare instance variables for button handlers
    private AcceptButtonHandler abHandler;
    private ClearButtonHandler cbHandler;

    public CustomerGUISix() // constructor method defines frame
    {
            setTitle("New Customer"); // set the title of the frame

            // instantiate JLabel objects
            nameLabel = new JLabel("Name: ", SwingConstants.RIGHT);
            ssnLabel = new JLabel("SS No.: ", SwingConstants.RIGHT);
            addressLabel = new JLabel("Address: ", SwingConstants.RIGHT);
            phoneLabel = new JLabel("Phone No.: ", SwingConstants.RIGHT);

            // instantiate JTextField objects
            nameTextField = new JTextField("Lastname, Firstname", 30);
            ssnTextField = new JTextField("xxx-xx-xxxx", 11);
            addressTextField = new JTextField("Street address, City, State, Zip", 40);
            phoneTextField = new JTextField("xxx-xxx-xxxx", 12);

            // instantiate Accept button
            acceptB = new JButton("Accept");
            abHandler = new AcceptButtonHandler();
            acceptB.addActionListener(abHandler);

            // instantiate Clear button
            clearB = new JButton("Clear");
            cbHandler = new ClearButtonHandler();
            clearB.addActionListener(cbHandler);

            // create two JMenu objects with mnemonics
            JMenu fileMenu = new JMenu("File");
            fileMenu.setMnemonic('F');
            JMenu helpMenu = new JMenu("Help");
            helpMenu.setMnemonic('H');

            // create and add two JMenuItem objects with mnemonics and action listeners
            JMenuItem acceptItem = new JMenuItem("Accept");
            acceptItem.setMnemonic('A');
            acceptItem.addActionListener(abHandler);
            fileMenu.add(acceptItem);

            JMenuItem clearItem = new JMenuItem("Clear");
            clearItem.setMnemonic('C');
            clearItem.addActionListener(cbHandler);
            fileMenu.add(clearItem);

            // create a JMenuBar object, set it, add menus
            JMenuBar bar = new JMenuBar();
            setJMenuBar(bar);
            bar.add(fileMenu);
            bar.add(helpMenu);

            Container pane = getContentPane(); // get a content pane for the frame

            // define a grid and a flow
            GridLayout aGrid = new GridLayout(4, 1);
            FlowLayout flowRight = new FlowLayout(FlowLayout.RIGHT);

            // create three panels
            JPanel labelPanel = new JPanel();
            JPanel textFieldPanel = new JPanel();
            JPanel buttonPanel = new JPanel();

            // set layouts for panels
            labelPanel.setLayout(aGrid);
            textFieldPanel.setLayout(aGrid);
            buttonPanel.setLayout(flowRight);

            // add labels to panel
            labelPanel.add(nameLabel);
            labelPanel.add(ssnLabel);
            labelPanel.add(addressLabel);
            labelPanel.add(phoneLabel);

            // add text fields to panel
            textFieldPanel.add(nameTextField);
            textFieldPanel.add(ssnTextField);
            textFieldPanel.add(addressTextField);
            textFieldPanel.add(phoneTextField);

            // add buttons to panel
            buttonPanel.add(acceptB);
            buttonPanel.add(clearB);

            // add panels to content pane using BorderLayout
            pane.add(labelPanel, BorderLayout.WEST);
            pane.add(textFieldPanel, BorderLayout.CENTER);
            pane.add(buttonPanel, BorderLayout.SOUTH);

            setSize(WIDTH, HEIGHT);   // set the frame size

            centerFrameOnScreen(WIDTH, HEIGHT); // call method to center frame on screen
    } // end constructor method

    public void centerFrameOnScreen(int frameWidth, int frameHeight) // method declaration
    {
            // use the Toolkit and Dimension classes of the java.awt package

            // create a Toolkit object
            Toolkit aToolkit = Toolkit.getDefaultToolkit();

            // create a Dimension object with user screen information
            Dimension screen = aToolkit.getScreenSize();

            // assign x, y position of upper-left corner of frame
            int xPostionOfFrame = (screen.width - frameWidth)/2;
            int yPositionOfFrame = (screen.height - frameHeight)/2;

            // method to center frame on user's screen
            setBounds(xPostionOfFrame, yPositionOfFrame, frameWidth, frameHeight);

    } // end centerFrameOnScreen() method

    private class AcceptButtonHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            String aName = nameTextField.getText();
            String aSSN = ssnTextField.getText();
            String anAddress = addressTextField.getText();
            String aPhone = phoneTextField.getText();

            Customer aCustomer = new Customer(aName, aSSN, anAddress, aPhone);

            System.out.println("Name: " + aCustomer.getName());
            System.out.println("SSN: " + aCustomer.getSSN());
            System.out.println("Address: " + aCustomer.getAddress());
            System.out.println("Phone: " + aCustomer.getPhone());
        }
    }

    private class ClearButtonHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            nameTextField.setText("");
            ssnTextField.setText("");
            addressTextField.setText("");
            phoneTextField.setText("");
        }
    }


    public static void main(String [] args)  // declare main() method
    {
            JFrame aCustomerGUISix = new CustomerGUISix();  // create the frame object
            aCustomerGUISix.show();  // display the frame
    } // end main

} // end class