Re: Using glade and Actions

[g4hx <g4hx gmx de>]

On 05/11/2012 07:32 PM, Kjell Ahlstedt wrote:
> 2012-05-11 17:37, g4hx skrev:
>> On 05/11/2012 04:08 PM, Kjell Ahlstedt wrote:
>>> Haven't you noticed the Gtk::Builder::get_object() method?
>>>
>>> Its documentation says "Note that this function does not increment the
>>> reference count of the returned object." That's wrong. That sentence is
>>> there just because the documentation is copied from the documentation of
>>> gtk_builder_get_object().
>>>
>>> Kjell
>>>
>>> 2012-05-10 23:47, g4hx skrev:
>>>> Hello everyone,
>>>>
>>>> unfortunately, I have a new problem with gtk3mmm: I have some
>>>> Actions/ActionGroups created using glade. Now I want to connect the
>>>> on_activate() signal of a certain Action to a member function of my
>>>> class. To this end, I need to get a reference to this Action from the
>>>> Builder. However, the Builder only has a get_widget method, which fails
>>>> with:
>>>>
>>>> "gtkmm: object `ActZoomIn' (type=`gtkmm__GtkActionGroup') (in
>>>> GtkBuilder
>>>> file) is not a widget type."
>>>>
>>>> My question is how to obtain the Action form the Builder or else how to
>>>> rewrite the code or modify the glade file to connect the Action's
>>>> method. Btw I also need a reference to an ActionGroup to call its
>>>> set_sensitive method, so glade's handler functions alone won't be
>>>> sufficient for me.
>>>>
>>>> g4hx
>>>> _______________________________________________
>>>>
>>>
>> Well, reference counters aside, I would much appreciate a (preferably
>> type-safe) way to obtain either a pointer or a Glib::RefPtr to the
>> Gtk::Action. The get_object is not template-based and returns a
>> GLib::RefPtr<Glib::Object>  and I don't know how to convert this to a
>> Gtk::Action* or GLib::RefPtr<Gtk::Action>.
>> If Gtk::Actions and Gtk::ActionGroups are available in glade, they
>> should be usable from the underlying code. Could anyone please point me
>> in the right direction here? I have already looked through many of the
>> links to programs using gtk3mm, but so far I have found nothing.
>>
>> g4hx
>>
> Glib::RefPtr<Glib::Object> refObjAction =
> refBuilder->get_object("action1");
> Glib::RefPtr<Gtk::Action> refAction =
> Glib::RefPtr<Gtk::Action>::cast_dynamic(refObjAction);
> if (!refAction)
> {
>   //??????? Error
> }
> 
> 

Thank you, that did the trick :)