PrintOperation.getNPagesToPrint

Returns the number of pages that will be printed.

Note that this value is set during print preparation phase ([gtk.types.PrintStatus.Preparing]), so this function should never be called before the data generation phase ([gtk.types.PrintStatus.GeneratingData]). You can connect to the signalGtk.PrintOperation::status-changed signal and call [gtk.print_operation.PrintOperation.getNPagesToPrint] when print status is [gtk.types.PrintStatus.GeneratingData].

This is typically used to track the progress of print operation.