//CBGDemo.java
//Demonstrates how checkboxes perform in a group
//Andy Harris, 05/00

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class CBGDemo extends Applet implements ItemListener{

  Label lblOutput = new Label("Sample Text");
  
  //size stuff
  Panel pnlSize = new Panel();
  CheckboxGroup cbgSize = new CheckboxGroup();
  Checkbox cb10 = new Checkbox("10", cbgSize, true);
  Checkbox cb20 = new Checkbox("20", cbgSize, false);
  Checkbox cb30 = new Checkbox("30", cbgSize, false);
  Checkbox cb40 = new Checkbox("40", cbgSize, false);

  public void init(){
    setLayout(new BorderLayout());
    add(lblOutput, BorderLayout.CENTER);
    add(pnlSize, BorderLayout.SOUTH);

    lblOutput.setFont(new Font("SansSerif", Font.PLAIN, 10));
    lblOutput.setAlignment(Label.CENTER);

    pnlSize.setLayout(new GridLayout(1,0));
    pnlSize.add(cb10);
    pnlSize.add(cb20);
    pnlSize.add(cb30);
    pnlSize.add(cb40);

    //add all the listeners
    cb10.addItemListener(this);
    cb20.addItemListener(this);
    cb30.addItemListener(this);
    cb40.addItemListener(this);
  } // end init

  public void itemStateChanged(ItemEvent e){
    Checkbox currentChoice = cbgSize.getSelectedCheckbox();
    String sizeString = currentChoice.getLabel();
    int fontSize = Integer.parseInt(sizeString);
    lblOutput.setFont (new Font ("SansSerif", Font.PLAIN, fontSize));
  } // end itemStateChanged
} // end class def