package usda.weru.util;

import java.awt.*;
import javax.swing.*;
import java.awt.print.*;

/** A simple utility class that lets you very simply print
 *  an arbitrary component. Just pass the component to the
 *  PrintUtilities.printComponent. The component you want to
 *  print doesn't need a print method and doesn't have to
 *  implement any interface or do anything special at all.
 *  <P>
 *  If you are going to be printing many times, it is marginally more 
 *  efficient to first do the following:
 *  <PRE>
 *    PrintUtilities printHelper = new PrintUtilities(theComponent);
 *  </PRE>
 *  then later do printHelper.print(). But this is a very tiny
 *  difference, so in most cases just do the simpler
 *  PrintUtilities.printComponent(componentToBePrinted).
 *
 *  7/99 Marty Hall, http://www.apl.jhu.edu/~hall/java/
 *  May be freely used or adapted.
 */

public class PrintUtilities implements Printable {
  private final Component componentToBePrinted;

  /**
   * 
   * @param c 
   */
  public static void printComponent(Component c) {
    new PrintUtilities(c).print();
  }

  private static String footer = "";
  
  /**
   * 
   * @param c 
   * @param ft 
   */
  public static void printComponent(Component c, String ft) {
	  footer = ft;
	  new PrintUtilities(c).print();
  }

  /**
   * 
   * @param componentToBePrinted 
   */
  public PrintUtilities(Component componentToBePrinted) {
    this.componentToBePrinted = componentToBePrinted;
  }

	/**
	 *
	 */
	public void print() {
    PrinterJob printJob = PrinterJob.getPrinterJob();
    printJob.setPrintable(this);
    if (printJob.printDialog())
      try {
        printJob.print();
      } catch(PrinterException pe) {
        //System.err.println("Error printing: " + pe);
      }
  }

  /**
   * 
   * @param g 
   * @param pageFormat 
   * @param pageIndex 
   * @return 
   */
  @Override
  public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
    if (pageIndex > 0) {
      return(NO_SUCH_PAGE);
    } else {
      Graphics2D g2d = (Graphics2D)g;
      g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
		double scalew = pageFormat.getImageableWidth() / componentToBePrinted.getSize().getWidth();
		double scaleh = pageFormat.getImageableHeight() / componentToBePrinted.getSize().getHeight();
		////System.out.println("PU_p: " + componentToBePrinted.getSize() + " " + pageFormat.getHeight() + " " +
//						   pageFormat.getImageableHeight() + " " + pageFormat.getWidth() + " "
//						   + pageFormat.getImageableWidth() + " " +
//						  scalew + " " + scaleh);
		double scale = (scalew < scaleh) ? scalew : scaleh;
		if (scale < 1.0) g2d.scale(scale, scale); // test to see if image will fit on page
      disableDoubleBuffering(componentToBePrinted);
      componentToBePrinted.paint(g2d);
//System.out.println("PU_p: size: " + g2d.getClipBounds());
		if (footer.length() != 0) {
			Rectangle clipRec = g2d.getClipBounds();
			g2d.drawString(footer, 3, clipRec.height-5);
		}
      enableDoubleBuffering(componentToBePrinted);
      return(PAGE_EXISTS);
    }
  }

  /** The speed and quality of printing suffers dramatically if
   *  any of the containers have double buffering turned on.
   *  So this turns if off globally.
	 * @param c
   *  @see enableDoubleBuffering
   */
  public static void disableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(false);
  }

  /** Re-enables double buffering globally.
	 * @param c */
  
  public static void enableDoubleBuffering(Component c) {
    RepaintManager currentManager = RepaintManager.currentManager(c);
    currentManager.setDoubleBufferingEnabled(true);
  }
}