How to open QPrinter device for RAW writes on Win7
I am working with Qt 5.1.1 on an application that will print to a connected USB Point-Of-Sale (POS) printer.
This printer only understands ASCII with embedded Escape sequences for font control.
Using QPrinterInfo::availablePrinters, I see my receipt printer displayed, however QPrinterInfo::location returns an empty QString (also returns empty description and makeAndModel). All printers on my system only report printerName.
I would like to do ASCII writes directly to the printer. My question is, can I open a QFile with the printer devicename? How would I determine the proper devicename at runtime? My search has not resulted in any useful information.
The Win7 device manager reports the receipt printer as "USB001", however if I try to QFile::open the file path "\.\USB001" or "\\.\USB001" I get an error.
What would be the proper method to write ASCII data to the USB printer?