com.klg.jclass.page.awt
Class JCAWTPrinter.PrinterThread

java.lang.Object
  |
  +--com.klg.jclass.page.awt.JCAWTPrinter.PrinterThread

All Implemented Interfaces:

Printable, Runnable

Enclosing class:

JCAWTPrinter

protected class JCAWTPrinter.PrinterThread

extends Object

implements Runnable, Printable

To get proper metrics for the printer we need to get its graphics. But, you cannot get a printer's graphics unless you actually print something. Classic chicken and egg problem. That is, we don't know what to print until we have used the metrics to figure out what will fit on a page. So, we start a print job to get the graphics context. Once we have it we immediately suspend the printing thread so we now have the luxury of using the gc. Once we have rendered all the document's pages using said gc we awake the printing thread to print those pages.

Field Summary

protected boolean	collate
protected int	copies
protected int	currentPage
protected int	first
protected boolean	firstPass
protected int	last
protected int	lastPageIndex
protected int	numPages
protected int	pageCount
protected int	pageIncr
protected PrinterJob	pj
protected boolean	reverse

Fields inherited from interface java.awt.print.Printable

NO_SUCH_PAGE, PAGE_EXISTS

Constructor Summary

JCAWTPrinter.PrinterThread(PrinterJob pj)

Method Summary

int	print(Graphics g, PageFormat pf, int pageIndex) Called by the Java2 printing mechanism.
void	run() This will be run on the "PageLayout print thread" thread.
void	wakeUp()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

pj

protected PrinterJob pj

copies

protected int copies

first

protected int first

last

protected int last

pageCount

protected int pageCount

collate

protected boolean collate

reverse

protected boolean reverse

currentPage

protected int currentPage

lastPageIndex

protected int lastPageIndex

pageIncr

protected int pageIncr

numPages

protected int numPages

firstPass

protected boolean firstPass

Constructor Detail

JCAWTPrinter.PrinterThread

public JCAWTPrinter.PrinterThread(PrinterJob pj)

Method Detail

run

public void run()

This will be run on the "PageLayout print thread" thread. It will start the print job. Java2 printing uses a callback method of printing. The callback is made to the "print" method below. The coveted Graphics object is passed in.

Specified by:

run in interface Runnable

print

public int print(Graphics g,
                 PageFormat pf,
                 int pageIndex)
          throws PrinterException

Called by the Java2 printing mechanism.

Specified by:

print in interface Printable

PrinterException

wakeUp

public void wakeUp()