/** 
  * Current Account Balances: Graphical Display Applet
  * @author Robert J Morton UK-YE572246C <rob@robmorton.20m.com>
  * @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

  // number of horizontal pixels per year
  private static final int H = 5;

  // inset to start of year-annotation
  private int SW[] = new int[decade.length];

  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 (one
      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, display decade label
    and decade boundary mark then jump across 10 years. */

    for(int i = 0; i < decade.length; i++) {
      g.drawString(decade[i], SW[i] + w, 20);
      g.drawLine(w, 0, w, 5);
      w += 10 * H;
    }
    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;}
}