/** 
  * Current Account Balances: Graphical Display Applet
  * @author Robert J Morton <robmorton@clara.net>
  * @version 12 July 2000, 23 April 2012
  * @copyright July 2000 Robert J Morton (all rights reserved) */

//  THE YEAR-SELECTOR BUTTONS CLASS

import java.awt.*;        // for graphics operations (GUI)
import java.awt.event.*;  // for the new-fangled 1.1 event handling
import javax.swing.*;     // swing GUI widgets library


public class selyear extends JPanel {

  private static final boolean 
    Leap[] = {
      false, true, false, false, false, true,
      false, false, false, true, false
    };

  private savlim1 ap;  // instance reference of the mail applet
  private mscale ms;   // instance reference of the month scale panel
  private graph gp;    // instance reference of the graph panel

  selyear(savlim1 ap, mscale ms, graph gp) {
    this.ap = ap;     // copy instance reference of the main applet
    this.ms = ms;     // copy instance reference of the month scale panel
    this.gp = gp;     // copy instance reference of the graph panel
    setLayout(null);  // to allow the control panels to be laid out manually

    // Create YEAR label, add it to the panel and set its position and size.
    JLabel yl = new JLabel("YEAR"); add(yl); yl.setBounds(17, 0, 100, 20);

    ButtonGroup CBG = new ButtonGroup();  //create group for radio buttons

    //CREATE EACH YEAR SELECTOR RADIO BUTTON AND ADD IT TO THE GROUP
    JRadioButton CB00 = new JRadioButton("1991",false); CBG.add(CB00);
    JRadioButton CB01 = new JRadioButton("1992",false); CBG.add(CB01);
    JRadioButton CB02 = new JRadioButton("1993",false); CBG.add(CB02);
    JRadioButton CB03 = new JRadioButton("1994",false); CBG.add(CB03);
    JRadioButton CB04 = new JRadioButton("1995",false); CBG.add(CB04);
    JRadioButton CB05 = new JRadioButton("1996",false); CBG.add(CB05);
    JRadioButton CB06 = new JRadioButton("1997",false); CBG.add(CB06);
    JRadioButton CB07 = new JRadioButton("1998",false); CBG.add(CB07);
    JRadioButton CB08 = new JRadioButton("1999",false); CBG.add(CB08);
    JRadioButton CB09 = new JRadioButton("2000",true);  CBG.add(CB09);
    JRadioButton CB10 = new JRadioButton("2001",false); CBG.add(CB10);

    int k = 20, j = 23, w = 100, h = 15;

    // ADD BUTTONS TO PANEL AND CREATE AN EVENT LISTENER FOR EACH
    add(CB00); CB00.setBounds(0,j,w,h); j += k;
    add(CB01); CB01.setBounds(0,j,w,h); j += k;
    add(CB02); CB02.setBounds(0,j,w,h); j += k;
    add(CB03); CB03.setBounds(0,j,w,h); j += k;
    add(CB04); CB04.setBounds(0,j,w,h); j += k;
    add(CB05); CB05.setBounds(0,j,w,h); j += k;
    add(CB06); CB06.setBounds(0,j,w,h); j += k;
    add(CB07); CB07.setBounds(0,j,w,h); j += k;
    add(CB08); CB08.setBounds(0,j,w,h); j += k;
    add(CB09); CB09.setBounds(0,j,w,h); j += k;
    add(CB10); CB10.setBounds(0,j,w,h); 

    // CREATE A LISTENER FOR EACH YEAR RADIO BUTTON
    CB00.addItemListener(new selyearlistener( 0,this));
    CB01.addItemListener(new selyearlistener( 1,this));
    CB02.addItemListener(new selyearlistener( 2,this));
    CB03.addItemListener(new selyearlistener( 3,this));
    CB04.addItemListener(new selyearlistener( 4,this));
    CB05.addItemListener(new selyearlistener( 5,this));
    CB06.addItemListener(new selyearlistener( 6,this));
    CB07.addItemListener(new selyearlistener( 7,this));
    CB08.addItemListener(new selyearlistener( 8,this));
    CB09.addItemListener(new selyearlistener( 9,this));
    CB10.addItemListener(new selyearlistener(10,this));
  }

   void setYear(int i) {  // called only by the listener class below
      int year = 1991 + i;
      boolean leap = Leap[i];  // whether or not selected year is a leap year

      ms.setLeap(leap);  // inform month-scale panel
      gp.setYear(year);  // inform graph panel which year has been selected
      gp.setLeap(leap);  // and whether or not it is a leap year
      ap.loadData(year); // inform main applet which year has been selected
   }
}


//LISTENS FOR EVENTS FROM YEAR SELECTOR BUTTONS

class selyearlistener implements ItemListener {
  int id;      // one of the above events
  selyear sy;  // the application that called: always the above applet!

  /* Constructor for a new checkbox event: sets 'id' number pertaining to this
  instance of 'selyearlistener' and the reference to the instance of the above
  class from which it came. (there will only be one instance anyway). */

  public selyearlistener(int id, selyear sy) { this.id = id; this.sy = sy; }

  public void itemStateChanged(ItemEvent e) {
    switch(id) {  // an event has occurred from button 'id'

      /* Execute the method in the above applet that
      deals with the radio-button on whose instance
      of 'selyearlistener' this method was invoked. */

      case  0: sy.setYear( 0); break; case  1: sy.setYear( 1); break;
      case  2: sy.setYear( 2); break; case  3: sy.setYear( 3); break;
      case  4: sy.setYear( 4); break; case  5: sy.setYear( 5); break;
      case  6: sy.setYear( 6); break; case  7: sy.setYear( 7); break;
      case  8: sy.setYear( 8); break; case  9: sy.setYear( 9); break;
      case 10: sy.setYear(10); break;
      }
   }
}