/** 
  * Current Account Balances: Graphical Display Applet
  * @author Robert J Morton <robmorton@clara.net>
  * @version 12 July 2000, 27 April 2012
  * @copyright July 2000 Robert J Morton (all rights reserved) */

//  THE PANEL ON WHICH THE HORIZONTAL MONTH SCALE IS DISPLAYED

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

public class horiz extends JPanel {
  private static final String   
    decade[] = {"1960s","1970s","1980s","1990s"};  // decade labels
  private static final int
    H = 5;  // number of horizontal pixels per year
  private int
    SW[] = new int[decade.length];  // inset to start of year-annotation
  private Font font = new Font("Sans",Font.BOLD,13);

  horiz() {  // INSTANCE CONSTRUCTOR
    FontMetrics fm = getFontMetrics(font);  // measurements of the font
    for(int i = 0; i < decade.length; i++)  //for each of the 12 months

      /* Inset each month-name by the number of days in the month (1 day
      per pixel) minus the string-width of the month name (in pixels)
      plus 1 to counter possible rounding down all divided by 2.  */

      SW[i] = (H * 10 - fm.stringWidth(decade[i]) + 1) / 2;
  }

  public void paint(Graphics g) {
    g.setFont(font);
    g.setColor(Color.black);  // set pen (foreground) colour
    int w = 0;                // set to first year

    // for each year in current decade
    for(int i = 0; i < decade.length; i++) {
      g.drawString(decade[i],SW[i] + w,20);  // decade label
      g.drawLine(w,0,w,5);                   // decade boundary mark
      w += 10 * H;                           // jump across 10 years
    }
    g.drawLine(w,0,w,5);  // draw final year boundary mark
    g.drawLine(0,0,w,0);  // draw horizontal axis
  }

   int getDacades() {return decade.length;}
}