/** 
  * Current Account Balances: Graphical Display Applet
  * @author Robert J Morton UK-YE572246C <rob@robmorton.20m.com>
  * @version 12 July 2000, 23 April 2012
  * @copyright July 2000 Robert J Morton (all rights reserved) */

//  THE INFLATION-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 selinfl extends JPanel {
  private graph gp;  // instance reference of the graph display panel

  selinfl(graph gp) {  // INSTANCE CONSTRUCTOR
    this.gp = gp;      // graph display panel instance reference
    setLayout(null);   // set for panel to be laid out manually

    // create a button group for the radio buttons
    ButtonGroup CBI = new ButtonGroup();

    // Create the two inflation-correction option radio buttons.
    JRadioButton CB11 = 
      new JRadioButton("Show actual balances.",true); 
    JRadioButton CB12 = 
      new JRadioButton("Show balances inflation-correct to £Y2K.",false);

    /* Add them to the radio button group and also to the panel. Then set
    their respective positions and sizes within the panel. */

    CBI.add(CB11); add(CB11); CB11.setBounds(0,0,200,19);
    CBI.add(CB12); add(CB12); CB12.setBounds(0,20,350,19);

    // Create and register listeners for them
    CB11.addItemListener(new selinfllistener(0,this));
    CB12.addItemListener(new selinfllistener(1,this));
  }


  // set whether to show actual or inflation-corrected graphs
  void setInflate(int x) {
    boolean b = false;  // assume non-inflation-corrected
    if(x > 0)           // but if inflation-correction button pressed
      b = true;         // set flag to TRUE.
    gp.setInfl(b);      // pass 'inflation-corrected or not' state
   }                    // to graph panel
}


//LISTENS FOR EVENTS FROM INFLATION SELECTOR BUTTONS

class selinfllistener implements ItemListener {
  int id;      // one of the above events
  selinfl si;  // the application that called: always the above class

  /* Constructor for a new item listener: sets the 'id' number pertaining
  to this instance of 'selinfllistener' and the reference to the instance
  of the above class from which it came. (there's only be one instance). */

  public selinfllistener(int id, selinfl si) {
    this.id = id;
    this.si = si;
  }

  // an event has occurred from button 'id'
  public void itemStateChanged(ItemEvent e) {
    switch(id) {
      case 0: si.setInflate(0); break;  // not-inflation corrected
      case 1: si.setInflate(1);         // inflation corrected
    }
  }
}