On Wed, 25 Jul 2018 at 12:44, Göran Hasse <gor...@raditex.nu> wrote:

> Hello!
>
> I try to write my own widget. For this a study gtkswitch.c/.h
> ( http://ftp.gnome.org/pub/gnome/sources/gtk+/3.22/gtk+-3.22.30.tar.xz )
>
> There is a function gtk_switch_get_type - but there is no
> implementation?
>

See G_DEFINE_TYPE:


https://developer.gnome.org/gobject/stable/gobject-Type-Information.html#G-DEFINE-TYPE:CAPS

and the GObject tutorial:

  https://developer.gnome.org/gobject/stable/howto-gobject-code.html

Ciao,
 Emmanuele.

-- 
https://www.bassi.io
[@] ebassi [@gmail.com]
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