custom widget with custom property

[dexter <dexter balabit hu>]

Hi,

I'm trying to create a custom widget with a custom enum property.
I managed to do that, and it appears in glade, I can choose from the 
property values, and it saves it correctly to the .glade file. (actually 
it's a gtkbuilder file just with .glade extension.. whatever).

But when I start my program, it sets all the properties correctly from 
the .glade file except mine.

Debugging shows, that this function:
void custom_set_property_callback(GObject* object, unsigned int 
property_id, const GValue* value, GParamSpec* param_spec) property.cc:121

is called when the property is being set. When it gets to my custom 
property, in this line:
 if(Glib::ObjectBase *const wrapper = 
Glib::ObjectBase::_get_current_wrapper(object)) property.cc:124

Glib::ObjectBase::_get_current_wrapper(object) will return NULL, so it 
won't set the property. And as I realized the custom widget is only 
instantiated _AFTER_ it tries to set the property (This can be the main 
cause of not setting it).

Have you got any idea why is this happening?

Thx,
Balazs