package javabook.lecture2.myexprtest;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class Frame1 extends JFrame {
  JPanel contentPane;
  JLabel statusBar = new JLabel();
  FlowLayout flowLayout1 = new FlowLayout();
  Label label1 = new Label();
  TextField textField1 = new TextField();
  TextField textField2 = new TextField();
  Button button1 = new Button();
  TextArea textArea1 = new TextArea();

  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(flowLayout1);
    this.setSize(new Dimension(400, 250));
    this.setTitle("我的計算器");
    statusBar.setText(" ");
    label1.setText("請輸入兩個整型數據");
    textField1.setColumns(7);
    textField1.setText("");
    textField2.setColumns(7);
    textField2.setText("");
    button1.setLabel("確認");
    button1.addActionListener(new Frame1_button1_actionAdapter(this));
    textArea1.setColumns(50);
    textArea1.setEditable(false);
    textArea1.setEnabled(true);
    textArea1.setText("");
    textArea1.setVisible(true);
    contentPane.setToolTipText("");
    contentPane.setVerifyInputWhenFocusTarget(true);
    contentPane.add(statusBar, null);
    contentPane.add(label1, null);
    contentPane.add(textField1, null);
    contentPane.add(textField2, null);
    contentPane.add(button1, null);
    contentPane.add(textArea1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void button1_actionPerformed(ActionEvent e) {
    textArea1.setText("");
    try{
      int a = Integer.parseInt(textField1.getText());
      int b = Integer.parseInt(textField2.getText());

      textArea1.append(a + " + " + b + " = " + (a + b) + "\n");
      textArea1.append(a + " - " + b + " = " + (a - b) + "\n");
      textArea1.append(a + " * " + b + " = " + (a * b) + "\n");
      textArea1.append(a + " / " + b + " = " + (a / b) + "\n");
      textArea1.append(a + " % " + b + " = " + (a % b) + "\n");
    }catch(Exception ex){
      textArea1.setText("Error : " + ex.getMessage());
    }
  }
}

class Frame1_button1_actionAdapter implements java.awt.event.ActionListener {
  Frame1 adaptee;

  Frame1_button1_actionAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.button1_actionPerformed(e);
  }
}