/** 
  * 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 MAXIMUM, MINIMUM, AVERAGE AND SWING DISPLAY PANEL

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


public class maxmin extends JPanel {

  // larger font for displaying the statistics figures
  private Font font = new Font("Sans",Font.BOLD,14);

  private static final Color 
    bg = new Color(238,238,238);  // main background colour for this panel

  private String 
    Max = "",  // string to hold the maximum balance over the year
    Min = "",  // string to hold the minimum balance over the year
    Av = "",   // string to hold the average balance over the year
    Sw = "";   // string to hold the swing in the balance over the year


  void atualizar(int max, int min, int a, int w) {
    Max = money(max);  // convert the maximum balance figure to a string
    Min = money(min);  // convert the minimum balance figure to a string

    Sw = money(max - min); // convert the swing figure to a string

    Av  = money((int)((double)a/(double)w));  // convert the average

    repaint();  // redisplay the statistics figures
  }


  String money(int x) {  // MONEY DISPLAY FORMATTER (takes integral pence)
    double X = (double)x;
    X /= 100;           // form into decimal pounds
    String s = "" + X;  // form into a string
    int
      c = '.';  // decimal point character

      i = s.lastIndexOf(c);  // find position of decimal point in string

    if(i == -1)    // if no decimal point found
      s += ".00";  // tack on a .00 pence
    else {         // otherwise there is a decimal point, so

      int e = s.length() - i;  // how far decimal point is from end of string

      if(e == 1)       // if it is at the end of the string
        s += "00";     // add two zeros after it
      else if(e == 2)  // if it is the last-but-one character
        s += "0";      // add only one zero after it
    }                  // otherwise you don't add any zeros
    return s;          // return the formatted string
  }


  public void paint(Graphics g) {
    g.setColor(bg); 
    g.fillRect(0,0,350,50);   // clear the average balance panel
    g.setColor(Color.black);  // display average balance for the year in black
    g.setFont(font);          // print the statistics data in black
    g.drawString("Max",0,22);
    g.drawString("£" + Max,40,22);
    g.drawString("Min",0,42);
    g.drawString("£" + Min,40,42);
    g.drawString("Average",146,22);
    g.drawString("£" + Av,220,22);
    g.drawString("Swing",146,42);
    g.drawString("£" + Sw,220,42);
  }
}