PrintablePage.java :  » XML-UI » xui32 » com » xoetrope » print » Java Open Source

package com.xoetrope.print;

import java.awt.Container;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import net.xoetrope.xui.XProject;

import net.xoetrope.xui.XProjectManager;
import net.xoetrope.xui.style.XStyle;


/**
 * A decoration of the XPage to allow printing. The class can also support printing in panels or other containers.
 *
 * <p> Copyright (c) Xoetrope Ltd., 2001-2006, This software is licensed under
 * the GNU Public License (GPL), please see license.txt for more details. If
 * you make commercial use of this software you must purchase a commercial
 * license from Xoetrope.</p>
 * <p> $Revision: 1.4 $</p>
 */
public class PrintablePage implements Printable
{
  /**
   * The current page or container being printed
   */
  protected Container currentPage;
  /**
   * The PrintOut class to which this printable page belongs
   */
  protected Printout printout;

  /**
   * The owner project and the context in which this object operates.
   */
  protected XProject currentProject = XProjectManager.getCurrentProject();

  /**
   * Create a new printable page
   * @param page The page or container to be printed
   * @param po The printout that will 'own' the printable page
   */
  public PrintablePage( Container page, Printout po )
  {
    currentPage = page;
    printout = po;
  }

  /**
   * Print the page
   * @param g The graphics context
   * @param pf the page format
   * @param pageIndex the index of the page within the printout page set
   * @throws java.awt.print.PrinterException Some printing exception occured
   * @return Printable.PAGE_EXISTS on success
   */
  public int print( Graphics g, PageFormat pf, int pageIndex ) throws PrinterException
  {
    Font f = currentProject.getStyleManager().getFont( "base" );
    g.setFont( f );
    g.setColor( currentProject.getStyleManager().getStyle( "base" ).getStyleAsColor( XStyle.COLOR_FORE ));
    FontMetrics fm = g.getFontMetrics();

    double imageableX = pf.getImageableX();
    double imageableY = pf.getImageableY();
    double imageableW = pf.getImageableWidth();
    double imageableH = pf.getImageableHeight();

    Graphics2D g2 = ( Graphics2D )g;
    int headerHeight = 0, footerHeight = 0;
    for ( int i = 0; i < 3; i++ )
      headerHeight = Math.max( headerHeight, printout.printDecoration( g2, pf, true, i, imageableX + i * imageableW / 3.0, imageableY, fm ) );

    for ( int i = 0; i < 3; i++ )
      footerHeight = Math.max( footerHeight, printout.printDecoration( g2, pf, false, i, imageableX + i * imageableW / 3.0, imageableY + imageableH - ( headerHeight + footerHeight ), fm ) );

    g2.translate( imageableX, imageableY );
    g2.setClip( 0, 0, currentPage.getWidth(), currentPage.getHeight() );

    // Setup the scaling
    double scale;
    imageableH -= ( headerHeight + footerHeight );
    if ( pf.getOrientation() == PageFormat.LANDSCAPE )
      scale = imageableH / currentPage.getHeight();
    else
      scale = imageableW / currentPage.getWidth();

    g2.translate( imageableX, imageableY + headerHeight );
    g2.scale( scale, scale );
    g2.setClip( 0, 0, currentPage.getWidth(), currentPage.getHeight() );

    currentPage.print( g );
    currentPage.printComponents( g );

    return Printable.PAGE_EXISTS;
  }

  /**
   * Get the page or container wrapped by this class.
   * @return the wrapped container
   */
  public Container getPage()
  {
    return currentPage;
  }
}