PrintOperation.run

Runs the print operation, by first letting the user modify print settings in the print dialog, and then print the document.

Normally that this function does not return until the rendering of all pages is complete. You can connect to the #GtkPrintOperation::status-changed signal on op to obtain some information about the progress of the print operation. Furthermore, it may use a recursive mainloop to show the print dialog.

If you call [gtk.print_operation.PrintOperation.setAllowAsync] or set the #GtkPrintOperation:allow-async property the operation will run asynchronously if this is supported on the platform. The #GtkPrintOperation::done signal will be emitted with the result of the operation when the it is done (i.e. when the dialog is canceled, or when the print succeeds or fails).

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

if (page_setup != NULL)
 gtk_print_operation_set_default_page_setup (print, page_setup);

g_signal_connect (print, "begin-print",
                 G_CALLBACK (begin_print), &data);
g_signal_connect (print, "draw-page",
                 G_CALLBACK (draw_page), &data);

res = gtk_print_operation_run (print,
                              GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
                              parent,
                              &error);

if (res == GTK_PRINT_OPERATION_RESULT_ERROR)
{
  error_dialog = gtk_message_dialog_new (GTK_WINDOW (parent),
 			                     GTK_DIALOG_DESTROY_WITH_PARENT,
					     GTK_MESSAGE_ERROR,
					     GTK_BUTTONS_CLOSE,
					     "Error printing file:\n%s",
					     error->message);
  g_signal_connect (error_dialog, "response",
                    G_CALLBACK (gtk_widget_destroy), NULL);
  gtk_widget_show (error_dialog);
  g_error_free (error);
}
else if (res == GTK_PRINT_OPERATION_RESULT_APPLY)
{
  if (settings != NULL)
g_object_unref (settings);
  settings = g_object_ref (gtk_print_operation_get_print_settings (print));
}

Note that [gtk.print_operation.PrintOperation.run] can only be called once on a given #GtkPrintOperation.