//import javax.swing.JButton;
//import javax.swing.JTextField;
//import javax.swing.JLabel;
//import javax.swing.JFrame;
import java.awt.event.*;
import javax.swing.*;
import java.awt.FlowLayout;

class BobPanel extends JPanel
{
    private int numstudents;
    private double classAverage;
    private JButton myButton;
    private JTextField firstNameField;
    private JTextField LastNameField;
    private JLabel label1;
    private JLabel label2;
    private JCheckBox cbox;
    private String[] buttonLabels = {"Button1", "Button2", "Button3", "Button4"};
    private JRadioButton[] rbuttons;
    ButtonGroup bgroup;

   public BobPanel()			// one possible constructor
   {
       setLayout(new FlowLayout());

       firstNameField = new JTextField(15);
       this.add(firstNameField);
	//  this is the same as saying:  add(firstNameField);

       myButton = new JButton("Query the text field");
       add(myButton);

       bgroup = new ButtonGroup();
       rbuttons = new JRadioButton[buttonLabels.length];
       for (int i = 0; i < buttonLabels.length; i++)
       {
          rbuttons[i] = new JRadioButton(buttonLabels[i]);
          add(rbuttons[i]);
	    bgroup.add(rbuttons[i]);
       }


       cbox = new JCheckBox("Would you like our spam newsletter");
       add(cbox);



       label1 = new JLabel("Default Text");
       add(label1);


	// we will set up an event on the BUTTON that reads the textfield
        //  and sets the LABEL's text to the same thing

      Fred evan = new Fred();		// this is an object of our inner class type below
      myButton.addActionListener(evan);		//  what to pass in here?
      firstNameField.addActionListener(evan);

	//  we will continue from here on Thursday

   }


   public int GetNumStudents()
   {
       return numstudents;
   }


   public static void main(String[] args)
   {    
     // from here, can I use the variables I declared above?
     //   NO!!!!!!!!!!!!!!!!!!!

      JFrame myFrame = new JFrame("My Program In Class"); 

      // This line builds a BobPanel object (which IS a JPanel, because
      //   class BobPanel extends JPanel -- with customization)
      //   AND it runs the BobPanel constructor.
      BobPanel p = new BobPanel();	
      myFrame.add(p);		// adds the panel (p) INTO the frame (myFrame)

      myFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      myFrame.setSize( 400, 300 ); // set frame size
      myFrame.setVisible( true ); // display frame
   }


   // we will write an inner class that IMPLEMENTS the ActionListener interface, 
   //   so that objects of this type can be passed IN to the "addActionListener" method
   private class Fred implements ActionListener		// implementing the interface
   { 

       // this is the function that RUNS when an object of type Fred is
       //    associated with a specific component that calls addActionListener
       public void actionPerformed(ActionEvent e)
       {
           if (e.getSource() == myButton)
           {  String s = firstNameField.getText();	// retrieve text from the textfield
	        label1.setText(s);				// set that as the label's text
           }
		else if (e.getSource() == firstNameField)
	      {
			JOptionPane.showMessageDialog(null, "Surprise! Your text is: " + 
				firstNameField.getText());
            }
       }
   } // end of class Fred (which is an INNER class inside BobPanel)

}   // end of class BobPanel