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Thread: printer problem

  1. #1
    Join Date
    Dec 2009
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    Qt products
    Qt4 Qt/Embedded
    Platforms
    Unix/X11

    Default printer problem

    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();
    }
    }

  2. #2
    Join Date
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    Platforms
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    Default Re: printer problem

    Does it work with other Qt applications, for example the textedit-example from the Qt distribution?
    It's nice to be important but it's more important to be nice.

  3. #3
    Join Date
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    Qt products
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    Default Re: printer problem

    Thanks for your reply.

    yes it is working for textedit-example also

  4. #4
    Join Date
    Feb 2011
    Posts
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    Qt products
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    Platforms
    Unix/X11 Windows

    Default Re: printer problem

    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

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