// COBOL Programmers Swing With Java - copyright 2005 Doke, Hardgrave, & Johnson
// Chapter 10 - Graphical User Interfaces
// Program to demonstrate GUI w/ buttons
// CustomerGUIFour.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 CustomerGUIFour 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 CustomerGUIFour() // constructor method defines frame
    {
            setTitle("New Customer"); // set the title of the frame

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

            // 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);

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

            GridLayout aGrid = new GridLayout(5,2); // create a five row, two column layout

            pane.setLayout(aGrid); // set the layout for the pane

            // add JLabel, JTextField, and JButton objects to the content pane
            pane.add(nameLabel);
            pane.add(nameTextField);
            pane.add(ssnLabel);
            pane.add(ssnTextField);
            pane.add(addressLabel);
            pane.add(addressTextField);
            pane.add(phoneLabel);
            pane.add(phoneTextField);
            pane.add(acceptB);
            pane.add(clearB);

            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 aCustomerGUIFour = new CustomerGUIFour();  // create the frame object
            aCustomerGUIFour.show();  // display the frame
    } // end main

} // end class