How do I change the NSPrintInfo duplex?

Question

Using UIKit I can set up a print job using UIPrintInfo as normal and set the printInfo.duplex to UIPrintInfoDuplexShortEdge which means that when I print multiple pages in landscape orientation the document comes out nicely laid out on the paper.

I would like to do the same in Cocoa but I can't find the equivalent. How do I do this?

Answer 1

You need to access the low-level Core Printing object and modify that:

PMPrintSettings printSettings = printInfo.PMPrintSettings;
if (PMSetDuplex(printSettings, kPMDuplexTumble) == noErr)
    [printInfo updateFromPMPrintSettings];