//  BirthdaysApplet.java  (c) Kari Laitinen

//  2006-02-17  File created.
//  2009-01-29  Latest modification.

/*  This applet is a GUI version of program
    BirthdaysGregorianCalendar.java.

    With this program you can check on what days of week
    your important birthdays occur.
*/

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

import java.util.Calendar ;
import java.util.GregorianCalendar ;

class BirthdaysPanel extends JPanel
                     implements ActionListener, ItemListener
{
   int  selected_decade  =  0 ;

   JComboBox list_of_years, list_of_months, list_of_days ;

   JButton  previous_decade_button, next_decade_button,
            mode_button, help_button ;

   public BirthdaysPanel()
   {
      setLayout( new BorderLayout() ) ;

      list_of_years   =  new  JComboBox() ;
      list_of_months  =  new  JComboBox() ;
      list_of_days    =  new  JComboBox() ;

      Font font_for_combo_boxes  =  new  Font( "Courier", Font.BOLD, 14 ) ;

      list_of_years.setFont( font_for_combo_boxes ) ;
      list_of_months.setFont( font_for_combo_boxes ) ;
      list_of_days.setFont( font_for_combo_boxes ) ;


      for ( int selectable_birth_year  =  1850 ;
                selectable_birth_year  <  2050 ;
                selectable_birth_year  ++ )
      {
         list_of_years.addItem( "" + selectable_birth_year);
      }

      for ( int selectable_birth_month  =   1 ;
                selectable_birth_month  <  13 ;
                selectable_birth_month  ++ )
      {
         list_of_months.addItem(
                    String.format( "%2d", selectable_birth_month ) ) ;
      }

      for ( int selectable_birth_day  =   1 ;
                selectable_birth_day  <  32 ;
                selectable_birth_day  ++ )
      {
         list_of_days.addItem( String.format( "%2d", selectable_birth_day ) );
      }

      list_of_years.setSelectedIndex( 130 ) ;
      list_of_months.setSelectedIndex( 11 ) ;
      list_of_days.setSelectedIndex( 30 ) ;

      list_of_years.setMaximumRowCount( 11 ) ;
      list_of_days.setMaximumRowCount( 11 ) ;

      list_of_years.addItemListener( this ) ;
      list_of_months.addItemListener( this ) ;
      list_of_days.addItemListener( this ) ;

      JPanel  birthday_selections_panel  =  new  JPanel() ;

      birthday_selections_panel.add( new JLabel( "SET YOUR BIRTHDAY:" ) );

      birthday_selections_panel.add( list_of_years ) ;
      birthday_selections_panel.add( list_of_months ) ;
      birthday_selections_panel.add( list_of_days ) ;
      birthday_selections_panel.add( new JLabel( "Format is YYYY-MM-DD" ) );

      add( "North", birthday_selections_panel ) ;

      previous_decade_button  =  new  JButton( "<< DECADE" ) ;
      next_decade_button      =  new  JButton( "DECADE >>" ) ;
      mode_button             =  new  JButton( "DAYS MODE" ) ;
      help_button             =  new  JButton( "HELP" ) ;

      previous_decade_button.addActionListener( this ) ;
      next_decade_button.addActionListener( this ) ;
      mode_button.addActionListener( this ) ;
      help_button.addActionListener( this ) ;

      //  We'll disable the Mode and Help buttons because they
      //  cannot be used yet.

      mode_button.setEnabled( false ) ;
      help_button.setEnabled( false ) ;

      JPanel  southern_operations_panel  =  new  JPanel() ;

      southern_operations_panel.add( previous_decade_button ) ;
      southern_operations_panel.add( next_decade_button ) ;
      southern_operations_panel.add( mode_button ) ;
      southern_operations_panel.add( help_button ) ;

      add( "South", southern_operations_panel ) ;

   }

   public void actionPerformed( ActionEvent event )
   {
      if ( event.getSource() instanceof JButton )
      {
         if ( event.getSource()  ==  previous_decade_button )
         {
            selected_decade  =  selected_decade  -  10 ;
         }
         else if ( event.getSource()  ==  next_decade_button )
         {
            selected_decade  =  selected_decade  +  10 ;
         }
         else if ( event.getSource()  ==  mode_button )
         {
         }
         else if ( event.getSource()  ==  help_button )
         {
         }

         repaint() ;
      }
   }


   public void itemStateChanged( ItemEvent event )
   {
//      selected_decade  =  0 ;

      System.out.print( " I " ) ;

      repaint() ;
   }

   public void paintComponent( Graphics graphics )
   {
      //  The superclass version of paintComponent() clears the
      //  component area and does other necessary things.

      super.paintComponent( graphics ) ;

      String[]  days_of_week =

         { "Sunday", "Monday", "Tuesday", "Wednesday",
           "Thursday", "Friday", "Saturday" } ;

      String[]  names_of_months  =  

         { "January", "February", "March", "April",
           "May", "June", "July", "August",
           "September", "October", "November", "December" } ;


      Calendar date_of_birth  =  new  GregorianCalendar(

       Integer.parseInt( ((String) list_of_years.getSelectedItem()).trim() ),
       Integer.parseInt( ((String) list_of_months.getSelectedItem()).trim() ) - 1,
       Integer.parseInt( ((String) list_of_days.getSelectedItem()).trim() ) ) ;

      graphics.setFont( new Font( "Courier", Font.BOLD, 12 ) ) ;

      int  printing_position_y  =  100 ;

      int  years_to_celebrate  =  selected_decade ;

      while ( years_to_celebrate  <  12 + selected_decade )
      {
         Calendar date_to_celebrate  =  new  GregorianCalendar(

                    date_of_birth.get( Calendar.YEAR )  +  years_to_celebrate,
                    date_of_birth.get( Calendar.MONTH ),
                    date_of_birth.get( Calendar.DAY_OF_MONTH ) ) ;

         String line_to_screen  =  String.format(

             "%3d years on %10s, %s %d, %d",

             years_to_celebrate,
             days_of_week[ date_to_celebrate.get( Calendar.DAY_OF_WEEK ) - 1 ],
             names_of_months[ date_to_celebrate.get( Calendar.MONTH ) ],
             date_to_celebrate.get( Calendar.DAY_OF_MONTH ),
             date_to_celebrate.get( Calendar.YEAR ) ) ;

         graphics.drawString( line_to_screen, 100, printing_position_y ) ;

         printing_position_y  =  printing_position_y  +  20 ;

         years_to_celebrate  =  years_to_celebrate  +  1 ;
      }
   }
}

public class BirthdaysApplet extends JApplet
{
   public void init()
   {
      getContentPane().add( new BirthdaysPanel() ) ;
   }
}