Problem with gtk_print_operation_run()

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Hi,

I have problems using the printing feature with this GTK 2.x code:

----8<--------8<--------8<--------8<--------8<----
        GtkPrintOperation *print;
        GtkPrintOperationResult res;

        print = gtk_print_operation_new ();

        if (settings != NULL) 
                gtk_print_operation_set_print_settings (print, settings);

        g_signal_connect (print, "status-changed", G_CALLBACK (print_status_changed), NULL);
        g_signal_connect (print, "begin-print", G_CALLBACK (begin_print), NULL);
        g_signal_connect (print, "request-page-setup", G_CALLBACK (print_request_page_setup), NULL);
        g_signal_connect (print, "done", G_CALLBACK (print_done), NULL);
        g_signal_connect (print, "end-print", G_CALLBACK (print_end), NULL);
        g_signal_connect (print, "paginate", G_CALLBACK (print_paginate), NULL);
        g_signal_connect (print, "draw-page", G_CALLBACK (draw_page), NULL);

        gtk_print_operation_set_allow_async(print, FALSE);
        gtk_print_operation_set_job_name(operation, "myprog");
        gtk_print_operation_set_n_pages(operation, n_pages);
        gtk_print_operation_set_use_full_page (operation, TRUE);
        gtk_print_operation_set_unit (operation, GTK_UNIT_POINTS);

        res = gtk_print_operation_run (print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
                                                GTK_WINDOW (main_window), NULL);

        printf("on_button5_clicked gtk_print_operation_run result: %d\n", res);
----8<--------8<--------8<--------8<--------8<----

The problem is that my code only receives the "status-changed" event twice,
once with GTK_PRINT_STATUS_INITIAL and then with GTK_PRINT_STATUS_PREPARING. At this point,
the printer dialog disappears but my code doesn't receive any other printing event
or the result of gtk_print_operation_run().

I have used
        gtk_print_operation_set_allow_async(print, FALSE);
since I want the printing to be synchronous, at least up to spooling the print job.
The same happens without gtk_print_operation_set_allow_async(), I guess this is
the default.

The printing events progress further only when I press Ctrl-C in the terminal
from where I started this program. Only then I receive these in order:
- begin-print
- paginate
- status-change with status = GTK_PRINT_STATUS_GENERATING_DATA
- request-page-setup with page_nr 0
- draw-page with page_nr 0
- end-print
- status-change with status = GTK_PRINT_STATUS_SENDING_DATA
- status-change with status = GTK_PRINT_STATUS_PRINTING
- done with result = GTK_PRINT_OPERATION_RESULT_APPLY

Do I have to do something special in the status-changed callback to drive the
printing further? I am on Fedora 17/x86_64 if that's interesting.

Thanks in advance,
Zoltán Böszörményi

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