printer problem

[arashadsaifi]

Hi All,

I am using qt-embedded-4.5 on linux and qt 4.5 on window.
I have written the following code for printing on window and embedded linux (kernel 2.6.27).
Following code is not able to detect the printer on Linux but it is working on windows.

And I have tested printer manualy on Linux
like
USB printer is detected in directory /dev/usb/lp0.

using cat/echo command it is possible to print the file and text.
cat file > /dev/usb/lp0



What could be the problem?

Thanks for giving your valuable time.


QPrinter printer;
QPrintDialog dlg( &printer );
if( dlg.exec() == QDialog::Accepted )
{
QPainter painter( &printer );

painter.setPen( Qt::black );

for( int page=0; page<5; page++ )
{
painter.drawRect( printer.pageRect() );
painter.drawLine( printer.pageRect().topLeft(), printer.pageRect().bottomRight() );
painter.drawLine( printer.pageRect().topRight(), printer.pageRect().bottomLeft() );

QRectF textArea(
printer.pageRect().left() +printer.resolution() * 0.5,
printer.pageRect().top() +printer.resolution() * 0.5,
printer.pageRect().width() -printer.resolution() * 1.0,
printer.pageRect().height()-printer.resolution() * 1.5 );

painter.drawRect( textArea );

painter.drawText( textArea, Qt::AlignTop | Qt::AlignLeft, QString( "Page %1" ).arg( page+1 ) );

if( page != 4 )
printer.newPage();
}
}

[axeljaeger]

Does it work with other Qt applications, for example the textedit-example from the Qt distribution?

[arashadsaifi]

Thanks for your reply.

yes it is working for textedit-example also

[joan666]

Hi arashadsaifi
Have you solved the problem, please?
I have the same problem. My linux embedded system detects the USB printer at usblp0, but in the QPrintDialog not display it, only list "Print to file/PDF)" and "Print to file (Postscript).

Thanks
Joan