/** 
  * Applet to generate a graph of my 'as paid' 
    and my inflation-corrected income
  * @author Robert J Morton <robmorton@clara.net>
  * @version 18 July 2000, 27 April 2012
  * @copyright July 2000 Robert J Morton (all rights reserved) */

/* This applet require a specialised data files called income.dat located
   in the same directory as income.class and infln.class on the web server.
   It requires no server-side executables or scripts. The data files are
   generated from input text files by an off-line command-line java program
   called income_txtdat.class. This applet conforms to API 1.1  */

import java.awt.*;     // for graphics operations (GUI)
import javax.swing.*;  // swing GUI widgets library


public class graphs extends JPanel implements Runnable {
  private Thread T;   // reference for a separate run() thread
  private loader ld;  // instance reference to the data-loader
  private trace tr;   // instance reference to the data-loader

  private boolean 
    load = true,      // load default data file on start
    loading = false;  // true = the requested data is now loaded


  graphs(int XE, int YE, int ls, String cb, int v) {  // CONSTRUCTOR
    setBounds(0,0,XE,YE);
    setBackground(new Color(238,238,238));  // set background colour
    setLayout(null);  // allow the control panels to be laid out manually
    // Create instances of the following classes:
    horiz hz = new horiz();               // horizontal scale panel
    selfile sf = new selfile(this,v);     // file selector
    tr = new trace(this,hz,sf,v);         // graph drawing panel
    vert vt = new vert(this,sf,tr);       // vertical (financial) scale
    seltrace st = new seltrace(this,tr);  // trace selector (lower 3 radio 
    ld = new loader(ls,cb);               // data loader
   // Add them to this panel and set their positions and sizes
    add(hz); hz.setBounds(70,225,201,30);
    add(vt); vt.setBounds(10,14,56,212);
    add(tr); tr.setBounds(70,20,201,201);
    add(st); st.setBounds(10,270,500,75);
    add(sf); sf.setBounds(290,20,240,240);
    loadData(sf.getDefaultFile());  // load the default file
    T = new Thread(this);           // creating the thread object
    T.start();                      // and starting it running
  }


  // MANAGE INTERNET DATA TRANSFERS ON A SEPARATE THREAD
  public void run() {
    while(T != null) {       // while this thread exists
      if(load)               // if commanded to load a data file
        loading = true;      // a loading process is in operation
      if(ld.dataLoaded()) {  // if data file loaded
        load = false;        // this must be set before setD
        tr.setD(ld);         // pass B[] to the graph panel
        repaint();           // display the graph
        loading = false;     // the loading process has finished
      }
      try{Thread.sleep(50);}  // sleep then continue loading
      catch(InterruptedException e){}
    }
  }


  // LOAD A SPECIFIED DATA FILE
  void loadData(String fn) {  // called by both 'selfile'
    System.out.println("File: " + fn);
    ld.setFileName(fn + ".dat");
    load = true;
  }

  boolean loading(){return loading;}
}