Printing - what's wrong inside....

Question

Hello,
I'm trying to display the content of a JPanel onto a HP laser printer but I want to reduce the margins to 1cm from the top and 1cm from the left (converted it must be 30 pixels I think)...
Here is a part of my code preparing the printing process:
(and later an extract of MyPanel class)
PrinterJob printJob = PrinterJob.getPrinterJob();
PageFormat pff = printJob.defaultPage();
Paper p = new Paper();
// changing margins
p.setImageableArea(30,30,500,500);
pff.setPaper(p);
PageFormat pfbis = printJob.validatePage(pf);
// zone in an instance of MyPanel extending JPanel
//implementing Printable
printJob.setPrintable(zone);
try
printJob.print();
catch (Exception ex)
ex.printStackTrace();
/// extract of MyPanel class
// implentation of print in MyPanel class
public int print(Graphics g, PageFormat pf, int pi) throws PrinterException {
if (pi >= 1)
return Printable.NO_SUCH_PAGE;
Graphics2D graphics2D = (Graphics2D)g;
Rectangle2D.Double rectangle = new Rectangle2D.Double ();
rectangle.setRect(0,0,72,72);
graphics2D.draw (rectangle);
return Printable.PAGE_EXISTS;
the rectangle should be printed at 1cm from the top and from the left
--> it seem's that it is by the only visible part is the bottom right corner which is 1 inch from the border of the page
(1inch must be the default margin ??)
Is it possible to change the margin and have the rectangle being displayed at 1cm from the border (or even less than 1 cm????)
Thanks in advance
Loic

Answer 1

Hi,
First see the http://forum.java.sun.com/thread.jsp?forum=20&thread=28912 URL.
Secondly, you do not implement correctly the print method...
When you use g.drawRect(0,0,72,72);, you paint outside the margins of the paper. You should do this:
   public int print(Graphics g, PageFormat pageFormat, int pageIndex) throws PrinterException
   try
      Paper paper = pageFormat.getPaper() ;
      int xStart = (int)Math.rint(paper.getImageableX())+2 ;//+2 is here a small correction due to margins imprecision
      int yStart = (int)Math.rint(paper.getImageableY())+2 ;//+2 is here a small correction due to margins imprecision
      int xEnd = (int)Math.rint(xStart + 100) ;
      int yEnd = (int)Math.rint(yStart + 72) ;
      g.setColor(Color.black);
      g.drawRect(xStart,yStart,xEnd,yEnd);
      return Printable.PAGE_EXISTS;
      catch(Exception e)
         System.out.println("Exception :"+e.getMessage());
         return Printable.NO_SUCH_PAGE;
}Well try this. It should work.