package net.tions.sundial;

import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;

import javax.swing.JComponent;

/**
 * @author <a href="http://www.amazon.co.uk/exec/obidos/ASIN/1565924843/christopher0c-21">'Java 2D Graphics' by Jonathan Knudsen</a>
 * @version 1.0.0
 */
public class ComponentPrintable
    implements Printable {
  private Component mComponent;
  
  public ComponentPrintable(Component c) {
    mComponent = c;
  }
  
  public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
    if (pageIndex > 0) return NO_SUCH_PAGE;
    Graphics2D g2 = (Graphics2D)g;
    g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
    boolean wasBuffered = disableDoubleBuffering(mComponent);
    mComponent.paint(g2);
    restoreDoubleBuffering(mComponent, wasBuffered);
    return PAGE_EXISTS;
  }

  private boolean disableDoubleBuffering(Component c) {
    if (c instanceof JComponent == false) return false;
    JComponent jc = (JComponent)c;
    boolean wasBuffered = jc.isDoubleBuffered();
    jc.setDoubleBuffered(false);
    return wasBuffered;
  }
  
  private void restoreDoubleBuffering(Component c, boolean wasBuffered) {
    if (c instanceof JComponent)
      ((JComponent)c).setDoubleBuffered(wasBuffered);
  }
}