Mac Printing: device name versus queue name

[fredrossperry]

I am using QPrintDialog for the user to choose a printer, but using CUPS to do the actual printing.
This works fine, but does not launch the corresponding print queue app. So I am trying to do that.

Each print queue has an app in ~/Library/Printers, named the same as the queue.
My issue is that QPrintDialog returns a QPrinter whose name is the name of the print device, not the queue.
For example, I have a printer whose device name is "_192_168_1_7", but the queue name is "HP LaserJet 6P"

So, I need a way to find the queue name from the device name. Thanks.

[SGaist]

Hi,

Sounds like this "report":https://bugreports.qt-project.org/browse/QTBUG-3138 you might want to add a comment on it about your use case

[fredrossperry]

Thanks, I added a comment to the bug you mentioned. What I would up doing was, calling the CUPS function to list available printers (cupsGetDests). This returns available printers, along with a list of options for each. Among the options is "printer-info", which appears to hold the queue name.

@
QString queueName("");

    cups_dest_t *dests = NULL;
    int numDests = cupsGetDests(&dests);
    for (int i = 0; i < numDests; i++)
    {
        cups_dest_t dest = dests[i];
        if (printer->printerName().compare(QString(dest.name))==0)
        {
            for (int j = 0; j < dest.num_options; j++)
            {
                cups_option_t opt = dest.options[j];
                if (QString(opt.name).compare(QString("printer-info"))==0)
                {
                    queueName = QString(opt.value);
                    break;
                }
            }
        }
        if (!queueName.isEmpty())
            break;
    }
    cupsFreeDests(numDests, dests);

@

[edit: added missing coding tags @ SGaist]

[SGaist]

If you have the time for it you could add that API yourself to QPrinter and make it a part of Qt