[Solved] QPrinter crash on Qt5

ichdyan

Hi, i need help...
i write small program to print receipt. but having difficulties with Qt5. It always crash. in Qt4 it working just fine. So i decide to test it, here is the code:

@#include <QCoreApplication>
#include <QPrinter>
#include <QPainter>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

QPrinter printer;
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName("test.pdf");

QPainter p;
if (p.begin(&printer))
{
    p.drawText(0, 0, "test");
    p.end();
}

return 0;

}@

in Qt5 if i replace drawText with drawLine, crash didn't happen. Tested on Qt 5.3.1 MSVC 2013 and Qt 5.2.1 MSVC 2010, Qt 4.8.6 MSVC 2010. What is wrong with my code? Can someone give me a hint about the proper way to use QPrinter on Qt5. I'm just newbie on programming...
Thank you. Sorry for my bad english.

msue

Perhaps you just need a font.

ichdyan

thank you for replying..

added
@ QFont font("Arial");
p.setFont(font);@

but no luck

msue

I tested it: my debugger complained about a missing font and it wanted a QGuiApplication instead of a QCoreApplication. Then it worked on my machine.

SGaist

Hi and welcome to devnet,

IIRC you must use a QApplication

ichdyan

thank you msue and SGaist. solved...