// Author: Graham Freeman. July 2008
// Copyright (c) Graham Freeman.  g-freeman@adfa.edu.au
// The author accepts no responsibility for any problems caused by use of 
// this software.  It is supplied free of charge, and usage is unrestricted, 
// provided this copyright notice remains intact, regardless of how the 
// software may be modified by other people.  

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/** This class demonstrates some of the features of FormLayout.java,
    a non-Sun layout manager which is a little easier to use in some ways than
    tht standard classes.  It is required for this program to compile and 
    execute. 
    <p>
    It demonstrates a problem with non-Sun layout managers, the problem of
    determining the size of a JScrollPane after its contents have changed.  It
    is necessary to occasionally call pack() twice for size of the window to be
    correct. */

public class TestFormLayout2 extends JFrame implements ActionListener
{
   JButton reject, accept, quit;
   JTextArea addr;
   JScrollPane jsp;
   
   public static void main( String[] arg )
   {
      new TestFormLayout2().setVisible(true);
   }

   public TestFormLayout2()
   {
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      Container cpane = getContentPane();
      FormLayout form = new FormLayout(cpane);

      JLabel lab1 = new JLabel("Name: ") ;
      form.setTopAnchor( lab1, 3 );
      form.setLeftAnchor( lab1, 4 );
      JLabel lab2 = new JLabel("Address: ");

      JTextField name = new JTextField(" ",50);
      form.setLeftRelative( name, lab1, 3 );
      form.setLeftRelative( name, lab2, 3 );
      form.setTopAnchor( name, 3 );

      form.setLeftAnchor( lab2, 4 );
      form.setTopRelative( lab2, name, 3 );
      addr = new JTextArea(" ",3,50 );
      jsp = new JScrollPane( addr, 
               JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, 
               JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED );
      form.setLeftAlign( jsp, name );
      form.setTopRelative( jsp, name, 3 );
      form.setRightAnchor( jsp, 4 );

      JLabel lab4 = new JLabel("Adult ");
      form.setLeftAlign( lab4, name );
      form.setTopRelative( lab4, jsp, 3 );

      JTextField adults = new JTextField(" ",3);
      form.setLeftRelative( adults, lab4, 3 );
      form.setTopRelative( adults, jsp, 3 );

      JLabel Ch = new JLabel("Child");
      form.setLeftRelative( Ch, adults, 16 );
      form.setTopRelative( Ch, jsp, 3 );

      JTextField children = new JTextField(" ",3);
      form.setLeftRelative( children, Ch, 3 );
      form.setTopRelative( children, jsp, 3 );

      JLabel Con = new JLabel("Concession");
      form.setLeftRelative( Con, children, 16 );
      form.setTopRelative( Con, jsp, 3 );

      JTextField concess = new JTextField(" ",3);
      form.setLeftRelative( concess, Con, 3 );
      form.setTopRelative( concess, jsp, 3 );

      accept = new JButton("Accept");
      form.setHorizontalAnchor( accept, 0.2 );
      form.setTopRelative( accept, adults, 3 );
      reject = new JButton("Reject");
      form.setHorizontalAnchor( reject, 0.5 );
      form.setTopAlign( reject, accept );
      accept.addActionListener( this );
      reject.addActionListener( this );

      quit = new JButton("Exit");
      form.setHorizontalAnchor( quit, 0.8 );
      form.setTopAlign( quit, accept );
      form.setBottomAnchor( quit, 5 );
      quit.addActionListener( this );
      pack();
   }
   public void actionPerformed( ActionEvent e )
   {
      Object source = e.getSource();
      if (source == reject)
      {
         System.out.println("\nReject");
         jsp.setVisible(false);
         pack();
      }
      else if (source == accept)
      {
         System.out.println("\nAccept");
         addr.setText("First a very long line of text that should force a "
              +"horizontal scroll bar.  We need a fair bit of text; the font"
              +"is surprisingly narrow.\n");
         pack();
      }
      else if (source == quit)
      {
         System.out.println("\nQuit");
         jsp.setVisible(true);
         addr.append("and\nthen\nseveral\nlines\nto force\na "
              +"vertical\nscrollbar\n");
         pack();
         pack(); // Java bug: requires two packs in many places like this
      }
   }
}