Re: custom widget with custom property

Debugging further it seems that the custom widget is instantiated when it gets to the </child> tag in this xml:

<object class="gtkmm__CustomObject_bbvbox" id="bbvbox1">
   <property name="visible">True</property>
   <property name="orientation">vertical</property>
<object class="gtkmm__CustomObject_hbuttonboxstock" id="hbuttonboxstock1">
       <property name="visible">True</property>
       <property name="Buttons">add-remove-edit</property>
       <property name="position">0</property>

So here is what happens:
1. Gtkbuilder parses the xml file
2. it gets to the property "Buttons" but it cannot set it because the custom widget "gtkmm__CustomObject_hbuttonboxstock" not yet instantiated: Glib::ObjectBase::_get_current_wrapper(object) == NULL

3. it gets to the </child> tag, calls gtk_container_add which calls our own hbuttonboxstock_parent_set(GtkWidget *widget, GtkWidget *previous_parent) function, which calls wrap_new and that is where the hbuttonboxstock is instantiated

Somehow the order is wrong. I just don't know yet, how to change the order or why the C property setting is working and the C++ one is not.

----- Original Message -----
From: dexter <dexter balabit hu>
To: gtkmm-list gnome org
Sent: Wed, Aug 12, 2009 2:43:05 PM +0200
Subject: custom widget with custom property


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)

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))

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?

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