JavaWorldPrintExample1.java Source code

Introduction

Here is the source code for JavaWorldPrintExample1.java

Source

/**
 * Class: Example1
 * <p>
 * 
 * @author Jean-Pierre Dube <jpdube@videotron.ca>
 * @version 1.0
 * @since 1.0
 * @see Printable
 */

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterJob;

public class JavaWorldPrintExample1 implements Printable {
    public static void main(String[] args) {

        JavaWorldPrintExample1 example1 = new JavaWorldPrintExample1();
        System.exit(0);
    }

    //--- Private instances declarations
    private final double INCH = 72;

    /**
     * Constructor: Example1
     * <p>
     *  
     */
    public JavaWorldPrintExample1() {

        //--- Create a printerJob object
        PrinterJob printJob = PrinterJob.getPrinterJob();

        //--- Set the printable class to this one since we
        //--- are implementing the Printable interface
        printJob.setPrintable(this);

        //--- Show a print dialog to the user. If the user
        //--- click the print button, then print otherwise
        //--- cancel the print job
        if (printJob.printDialog()) {
            try {
                printJob.print();
            } catch (Exception PrintException) {
                PrintException.printStackTrace();
            }
        }

    }

    /**
     * Method: print
     * <p>
     * 
     * This class is responsible for rendering a page using the provided
     * parameters. The result will be a grid where each cell will be half an
     * inch by half an inch.
     * 
     * @param g
     *            a value of type Graphics
     * @param pageFormat
     *            a value of type PageFormat
     * @param page
     *            a value of type int
     * @return a value of type int
     */
    public int print(Graphics g, PageFormat pageFormat, int page) {

        int i;
        Graphics2D g2d;
        Line2D.Double line = new Line2D.Double();

        //--- Validate the page number, we only print the first page
        if (page == 0) {

            //--- Create a graphic2D object a set the default parameters
            g2d = (Graphics2D) g;
            g2d.setColor(Color.black);

            //--- Translate the origin to be (0,0)
            g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());

            //--- Print the vertical lines
            for (i = 0; i < pageFormat.getWidth(); i += INCH / 2) {
                line.setLine(i, 0, i, pageFormat.getHeight());
                g2d.draw(line);
            }

            //--- Print the horizontal lines
            for (i = 0; i < pageFormat.getHeight(); i += INCH / 2) {
                line.setLine(0, i, pageFormat.getWidth(), i);
                g2d.draw(line);
            }

            return (PAGE_EXISTS);
        } else
            return (NO_SUCH_PAGE);
    }

} //Example1