Dot Matrix Printer

[estanisgeyer]

Hi guys,

I'm trying to print to a dot matrix printer, but when printing, the printer advances a few pages to print. The following code:

QPrinter *prt = new QPrinter;
prt->setPrinterName(ui.comboBox_Printers->currentText());
qDebug() << "Printer: " << prt->printerName();   // Ok, dot printer
 
prt->setPaperSize(QSizeF(191, 93), QPrinter::Millimeter);
prt->setFullPage(true);
 
QPainter painter(prt);
painter.drawText(10, 10, 200, 100, Qt::AlignLeft | Qt::AlignTop, QString("Test printer"));

QPrinter *prt = new QPrinter;
prt->setPrinterName(ui.comboBox_Printers->currentText());
qDebug() << "Printer: " << prt->printerName();   // Ok, dot printer

prt->setPaperSize(QSizeF(191, 93), QPrinter::Millimeter);
prt->setFullPage(true);

QPainter painter(prt);
painter.drawText(10, 10, 200, 100, Qt::AlignLeft | Qt::AlignTop, QString("Test printer"));

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What may be happening?

[Lykurg]

What may be happening?

You print outside your page boundaries.

[estanisgeyer]

Hi,

There seems to be the problem. Moved to setFullPage(false) and the configuration of the cups, I changed the page size to custom, did not help. I tried also to change A3 and are now advanced a few pages, compared with the previous test.

I'm using an Epson LX-300, tried with the driver Epson Dot Matrix Foomatic/eps9high and Generic IBM-Compatible dot matrix printer.

[estanisgeyer]

Well, I have not found a solution using the cups. The solution was to send directly to the device.

QFile pr("/dev/usblp0");   // Device need 0666 permission to work.
 
if (pr.open(QFile::WriteOnly))
{
    QTextStream o(&pr);
    o << r;
}

QFile pr("/dev/usblp0");   // Device need 0666 permission to work.

if (pr.open(QFile::WriteOnly))
{
    QTextStream o(&pr);
    o << r;
}

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This is me looking like a bug.