/** 
  * 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 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;      // display panel instance reference
    setLayout(null);   // set for panel to be laid out manually

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

    /* Create each radio button, add it to the panel so that it is visible,
    add it also to the button group so that whenever a button is clicked,
    all the others become automatically de-selected, create an event list-
    ener for it in order to detect when it is clicked by the mouse. */

    JRadioButton CB11 = new JRadioButton("Show actual balances.",true); 
    add(CB11);
    CBI.add(CB11);
    CB11.setBounds(0,0,200,19);
    CB11.addItemListener(new selinfllistener(0,this));

    JRadioButton CB12 = 
      new JRadioButton("Show balances inflation-correct to £Y2K.", false);
    add(CB12);
    CBI.add(CB12);
    CB12.setBounds(0,20,350,19);
    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 the inflation-correction
      b = true;     // button was pressed, set true.
    gp.setInfl(b);  // Pass the 'inflation-corrected
  }                 // or not' state to the 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
  public selinfllistener(int id, selinfl si) {
    this.id = id;  // set id number of this instance of 'selinfllistener'
    this.si = si;  // 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) {
    switch(id) {
      case 0:
        si.setInflate(0);  // not-inflation corrected button pressed
        break;
      case 1:
        si.setInflate(1);  // inflation corrected button pressed
    }
  }
}