// SwingGUIs2.java
// One of each Swing GUI in JApplet with FlowLayout
// nested Event handler class per GUI
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class SwingGUIs2 extends JApplet {

    private JLabel myLabel;
    private JTextField myTextField;
    private JPasswordField myPasswordField;
    private JButton myButton;
    private JTextArea myTextArea;
    private JCheckBox myCheckBox1, myCheckBox2;
    private JRadioButton myRadioButton1, myRadioButton2;
    private ButtonGroup myButtonGroup;
    private JComboBox myComboBox;
    private JList myList;

   public void init() {
      // get applet's content pane and change its layout to FlowLayout
      Container container = getContentPane();  
      container.setLayout( new FlowLayout() ); 

      myLabel = new JLabel( "My JLabel" );
      container.add( myLabel );

      myTextField = new JTextField( "My JTextField", 20 );
      container.add( myTextField );
      //myTextField.setEditable( false );
      MyTextFieldHandler myTextFieldHandler = new MyTextFieldHandler();
      myTextField.addActionListener( myTextFieldHandler ); 


      myPasswordField = new JPasswordField( "", 20 );
      container.add( myPasswordField );
      MyPasswordFieldHandler myPasswordFieldHandler = new MyPasswordFieldHandler();
      myPasswordField.addActionListener( myPasswordFieldHandler ); 


      myButton = new JButton( "My JButton" );
      container.add( myButton );
      MyButtonHandler myButtonHandler = new MyButtonHandler();
      myButton.addActionListener( myButtonHandler ); 


      myCheckBox1 = new JCheckBox( "My JCheckBox 1" );
      container.add( myCheckBox1 );
      MyCheckBoxHandler myCheckBoxHandler = new MyCheckBoxHandler();
      myCheckBox1.addItemListener( myCheckBoxHandler ); 

      myCheckBox2 = new JCheckBox( "My JCheckBox 2" );
      container.add( myCheckBox2 );
      myCheckBox2.addItemListener( myCheckBoxHandler ); 

      myRadioButton1 = new JRadioButton( "My JRadioButton 1" );
      container.add( myRadioButton1 );
      MyRadioButtonHandler myRadioButtonHandler = new MyRadioButtonHandler();
      myRadioButton1.addItemListener( myRadioButtonHandler ); 

      myRadioButton2 = new JRadioButton( "My JRadioButton 2" );
      container.add( myRadioButton2 );
      myRadioButton2.addItemListener( myRadioButtonHandler ); 

      myButtonGroup = new ButtonGroup();
      myButtonGroup.add(myRadioButton1);
      myButtonGroup.add(myRadioButton2);


      String [] names = {"fred", "jane", "steve", "susan", "bob"};

      myComboBox = new JComboBox(names);
      myComboBox.setMaximumRowCount(3);
      container.add( myComboBox );
      MyComboBoxHandler myComboBoxHandler = new MyComboBoxHandler();
      myComboBox.addItemListener( myComboBoxHandler ); 


      myList = new JList(names);
      myList.setVisibleRowCount(3);
      myList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
      container.add(new JScrollPane(myList));
      MyListHandler myListHandler = new MyListHandler();
      myList.addListSelectionListener( myListHandler ); 

   }

    public void paint (Graphics g) {
	super.paint(g);

	//draw random line to see if alive
	g.drawLine((int)(Math.random()*getWidth()),
		   (int)(Math.random()*getHeight()),
		   (int)(Math.random()*getWidth()),
		   (int)(Math.random()*getHeight()));
    }



    private class MyTextFieldHandler implements ActionListener {
	public void actionPerformed( ActionEvent event ) {
	    JOptionPane.showMessageDialog(null,"myTextField got it: " +
					  event.getActionCommand() );
	    //myTextField.setText( "" );
	    ((JTextField)(event.getSource())).setText( "" );
	    
	}
    }
    
    private class MyButtonHandler implements ActionListener {
	public void actionPerformed( ActionEvent event ) {
	    JOptionPane.showMessageDialog(null,"myButton got it");
	}
    }
    
    private class MyPasswordFieldHandler implements ActionListener {
	public void actionPerformed( ActionEvent event ) {
	    JOptionPane.showMessageDialog(null,"myPasswordField got it: " +
					  event.getActionCommand()+ "  oops" );
	    //myPasswordField.setText( "" );
	    ((JPasswordField)(event.getSource())).setText( "" );
	}
    } 

    private class MyCheckBoxHandler implements ItemListener {
	public void itemStateChanged( ItemEvent event ) {
	    if ( event.getSource() == myCheckBox1 ) {
		if (event.getStateChange() == ItemEvent.SELECTED)
		    JOptionPane.showMessageDialog(null,"myCheckBox 1 selected");
		else if (event.getStateChange() == ItemEvent.DESELECTED)
		    JOptionPane.showMessageDialog(null,"myCheckBox 1 deselected");
	    }
	    else if ( event.getSource() == myCheckBox2 ) {
		if ( myCheckBox2.isSelected() )    //alternate way
		    JOptionPane.showMessageDialog(null,"myCheckBox 2 selected");
		else if (event.getStateChange() == ItemEvent.DESELECTED)
		    JOptionPane.showMessageDialog(null,"myCheckBox 2 deselected");
	    }
	}
    }

    private class MyRadioButtonHandler implements ItemListener {
	public void itemStateChanged( ItemEvent event ) {
	    if ( event.getSource() == myRadioButton1 ) {
		if (event.getStateChange() == ItemEvent.SELECTED)
		    JOptionPane.showMessageDialog(null,"myRadioButton 1 selected");
		else if (event.getStateChange() == ItemEvent.DESELECTED)
		    JOptionPane.showMessageDialog(null,"myRadioButton 1 deselected");
	    }
	    else if ( event.getSource() == myRadioButton2 ) {
		if ( myRadioButton2.isSelected() )    
		    JOptionPane.showMessageDialog(null,"myRadioButton 2 selected");
		else if (event.getStateChange() == ItemEvent.DESELECTED)
		    JOptionPane.showMessageDialog(null,"myRadioButton 2 deselected");
	    }
	}
    }

    private class MyComboBoxHandler implements ItemListener {
	public void itemStateChanged( ItemEvent event ) {
	    //this if not really needed...
	    if ( event.getSource() == myComboBox )
		if ( event.getStateChange() == ItemEvent.SELECTED )   
		    JOptionPane.showMessageDialog(null,"myComboBox selected index:" +
						  myComboBox.getSelectedIndex());
		else if ( event.getStateChange() == ItemEvent.DESELECTED )   
		    JOptionPane.showMessageDialog(null,"myComboBox deselected index:" +
						  myComboBox.getSelectedIndex());
	}
    }


    private class MyListHandler implements ListSelectionListener {
	public void valueChanged( ListSelectionEvent event ) {
	    if ( event.getSource() == myList )
		JOptionPane.showMessageDialog(null,"myList index: " +
					      myList.getSelectedIndex());
	}
    }

}