import java.awt.*;                          // Java GUI classes
import java.applet.*;
import java.awt.event.*;

// GUI Applet is loaded by GUI.html
// Displays Labels, Fields, Button, TextArea
// Constructs both BOOT and LOGIC

public class GUI extends Applet implements ActionListener {   
  private Logic logic;        // GUI calls Logic for ACTIONS
  private TextField idField;  // INPUT data
  private TextArea ta;        // OUTPUT reports
  public void init() {
    super.init();
    setLayout(null);
    
    // make a label
    Label idLabel = new Label("ID:");
    idLabel.setBounds(20,10,50,30);
    add(idLabel);
    
    // make an INPUT field
    idField = new TextField(130);
    idField.setBounds(80,10,80,30);
    add(idField);
 
    // make a Create ACTION button
    Button createButton = new Button("Create");
    createButton.setBounds(20,70,50,25);
    add(createButton);
    createButton.addActionListener(this); 
    
    // make a List ACTION button
    Button listButton = new Button("List");
    listButton.setBounds(80,70,50,25);
    add(listButton);
    listButton.addActionListener(this); 

    // make a Test ACTION button
    Button testButton = new Button("Test");
    testButton.setBounds(140,70,50,25);
    add(testButton);
    testButton.addActionListener(this); 

    // make an OUTPUT textarea
    ta = new TextArea();
    ta.setBounds(20,100,300,250);
    ta.setFont(new Font("Courier",Font.PLAIN,10));
    add(ta);

    // pre-populate some initial beans
    Boot boot = new Boot();

    // create Domain Logic, and give it the textarea for later printing
    logic = new Logic(ta);
  }
  // called by actionPerformed whenever a button is pushed
  // also called by StockTest to do Automated Test 
  public void doAction(String arg) {
    // if Create is pushed, call logic's method to handle the ACTION
    // pass along the field, so logic can access the INPUT data
    if (arg.equals("Create")) {
      logic.createBean(idField);
    }
    // if List is pushed, call logic's method to handle the ACTION
    // logic already has textarea, so that it can always OUTPUT
    if (arg.equals("List")) {
      logic.listBeans();
    }
    // if Test is pushed call GUITest to automatically fill in ID,
    // and to list all beans
    if (arg.equals("Test")) {
      new GUITest (this,ta,idField);
    }
  }
  // window manager calls this method when a button is pushed
  public void actionPerformed(ActionEvent event) {
    String arg = event.getActionCommand();
    doAction(arg); 
  }
}