Re: Error building template class 'GtkPrintUnixDialog'

[Scott Talbert <swt techie net>]

On Sun, 22 Feb 2015, Scott Talbert wrote:

> When calling gtk_print_operation_run(), I'm seeing this GTK error:
>
> Gtk-CRITICAL **: Error building template class 'GtkPrintUnixDialog' for an 
> instance of type 'GtkPrintUnixDialog': Invalid object type 
> `GtkPrinterOptionWidget' on line 567
>
> Does anyone know what might be the issue?
>
> This is the code for calling gtk_print_operation_run:
>    GtkPrintOperationResult response = gtk_print_operation_run
>                                       (
>                                           printOp,
>                                           GetShowDialog()
>                                            ? 
> GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG
>                                            : 
> GTK_PRINT_OPERATION_ACTION_PRINT,
>                                           m_parent
>                                            ? 
> GTK_WINDOW(gtk_widget_get_toplevel(m_parent->m_widget))
>                                            : NULL,
>                                           &gError
>                                       );

Okay, I've debugged this further.  Ultimately, what is happening here is 
GTK+ is calling dlsym() (via _g_module_symbol()) to lookup the 
gtk_printer_option_widget_get_type function and it fails to find it, ie, 
dlsym() returns NULL.

What I neglected to mention in the first place is that this failure is 
occurring when running as a Python application (wxPython to be specific). 
When I run the same code as a C++ application (wxWidgets), the failure 
does not occur.  Presumably this failure is occurring because the python 
binary itself is not linked with the GTK+ library.

Does anyone have any ideas of how to resolve this?

Thanks,
Scott