/*
IKE
Calculator
Revamped 6/17/01
*/
import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class Calculator extends Applet implements ActionListener
{        
    // variables  
    public TextField input1, input2, display1;
    public Button b1, b2, b3, b4, b5, b6;
    public Panel p1, p1a, p1b, p2;
    public Color newColor = new Color(124, 151, 240);

   public void init()
   {
      p1 = new Panel(new GridLayout(2, 1, 5, 5));
      p1a = new Panel(new GridLayout(1, 2, 5, 5));
      p1b = new Panel(new GridLayout(1, 1, 5, 5));
      p2 = new Panel(new GridLayout(2, 3, 5, 5));  

      setLayout(new GridLayout(2, 1, 5, 5));	
      setBackground(Color.blue);
 
      input1 = new TextField();
      input1.setBackground(Color.white);
     
      input2 = new TextField(); 
      input2.setBackground(Color.white);
     
      display1 = new TextField();  
      display1.setEditable(false);
      display1.setBackground(Color.white);

      b1 = new Button("+");
      b1.setBackground(newColor);
      b2 = new Button("-");
      b2.setBackground(newColor);
      b3 = new Button("C");
      b3.setBackground(newColor);
      b4 = new Button("*");
      b4.setBackground(newColor);
      b5 = new Button("/");
      b5.setBackground(newColor);
      b6 = new Button("%");
      b6.setBackground(newColor);
      	         
      p1a.add(input1); p1a.add(input2);
      p1b.add(display1);  

      p1.add(p1a); p1.add(p1b);
      p2.add(b1); p2.add(b2); p2.add(b3); 
      p2.add(b4); p2.add(b5); p2.add(b6);
   
      // add panels
      add(p1); add(p2); 

      b1.addActionListener(this);
      b2.addActionListener(this);
      b3.addActionListener(this);
      b4.addActionListener(this);
      b5.addActionListener(this);
      b6.addActionListener(this);      
   }
 
   public void actionPerformed(ActionEvent ae)
   {
      int num1, num2, answer = 0;   
      String str;
      
      // check for nothing in textField          
      str = input1.getText();
      if (str.equals(""))
        num1 = 0;
      else
         num1 = Integer.parseInt(str);

      str = input2.getText();
      if (str.equals(""))
        num2 = 0;
      else
        num2 = Integer.parseInt(str);     
      
      str = ae.getActionCommand();  

      // clear 
      if (str.equals ("C"))
      {
         display1.setText("");
         input1.setText("");
         input2.setText("");
      }             
      else
      // do the math
      { 
        if (str.equals ("+"))
           answer = num1 + num2;
        else if (str.equals ("-"))
           answer = num1 - num2; 
        else if (str.equals ("*"))
           answer = num1 * num2;
        else if (str.equals ("/"))
           answer = num1 / num2;
        else if (str.equals ("%"))
           answer = num1 % num2;             
        
        // display the result        
        // display1.setText(Double.toString(answer));
        display1.setText("Result = " + answer);
      
      }
   repaint();
   }
}