// Chloe Chao
// Caps.java
// October 20, 1997


import java.applet.*;
import java.awt.*;
import java.net.*;
import java.util.*;
import java.io.*;

public class Caps extends Applet {

// Globals and constants
  private Choice choice;
  private TextArea textArea;
  private Button button;
  private Font font;
  private FontMetrics fontmetrics;
  private static final int UPPERCASE = 0;
  private static final int LOWERCASE = 1;

 public void init() {

  // Take care of the font info
  font = new Font("Helvetica", Font.PLAIN, 12);
  fontmetrics = Toolkit.getDefaultToolkit().getFontMetrics( font );
 
  int gx, gy, cols, rows;
  gx = 540; gy = 382;
  cols = (int)((float)(gx-16)/fontmetrics.charWidth('A')) - 1; // subtract 16 for scrollbar
  rows = (int)((float)gy / fontmetrics.getHeight()) - 3;
  System.out.println("rows = " + rows + "  cols = " + cols );
  
  Panel p = new Panel();
  p.setLayout(new GridLayout(0,2));
  // Add the choice menu.
  makeChoice();
  p.add("West", choice);
  // Add the apply button.
  makeButton();
  p.add("East", button);
  validate();
    
  // Use BorderLayout.
  BorderLayout b = new BorderLayout();
  setLayout(b);
    // Add the textArea.
  makeTextArea(rows, cols);
  add( "North", textArea );
  add( "South", p );
  validate();
 

 }// end init()

 public void paint( Graphics g ) {
   paintComponents(g);
 }// end paint()

 public boolean handleEvent(Event e) {
   
    if (e.target == button) {
      String toBeChanged = textArea.getText();
      textArea.setText(change(toBeChanged, choice.getSelectedIndex() ));
      repaint();
      return true;
    }
    else
      return false;
 }

 private String change( String changeme, int mode ) {
   switch( mode ) {
   case UPPERCASE:
     return changeme.toUpperCase();
   case LOWERCASE:
     return changeme.toLowerCase();
   default:
     return null;
   }
 }
   
 private void makeChoice() {
   choice = new Choice();
   choice.addItem("to uppercase");
   choice.addItem("to lowercase");
 }

 private void makeButton() {
   button = new Button("do it.");
 }  

 private void makeTextArea(int r, int c) {
    
   textArea = new TextArea("Write a JAVA program with a TextArea widget, a Choice widget, and a Button widget.", r, c);
 }

}// end Caps