/** 
  * 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 mail 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

    JLabel yl = new JLabel("YEAR");
    add(yl);  // add it to the panel
    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 the selected year is a leap year
    ms.setLeap(leap);   // inform the 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
  public selyearlistener(int id, selyear sy) {
    this.id = id;  // set id number for this instance of 'selyearlistener'
    this.sy = sy;  // set the reference to the instance of the above class
  }                // from which it came. (only one instance anyway).

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

    /* To avoid a double pass through setYear(): only act on the
    mouse release of the button and not on the mouse press. */
    if(e.getStateChange() == ItemEvent.SELECTED) {

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

      switch(id) {
        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;
      }
    }
  }
}