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List:       gtk-devel
Subject:    Re: Extended Layout Summary
From:       Sven Herzberg <herzi () gnome-de ! org>
Date:       2008-01-10 16:19:48
Message-ID: 1199981988.12543.122.camel () wendolene
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Am Freitag, den 21.12.2007, 11:05 +0100 schrieb Mathias Hasselmann:
> Am Donnerstag, den 20.12.2007, 11:46 -0500 schrieb Havoc Pennington:
> > Third, since implementing an interface requires extra boilerplate 
> > GObject stuff, it would be convenient for authors of a custom widget if 
> > GtkWidget already did the boilerplate for them. Since for newly-written 
> > custom widgets, the recommendation would be to always support extended 
> > layout.
> 
> I don't see the boilerplate savings you talk about? As far as I
> understand GObject interfaces, you always need this this single-line
> boilerplate for overriding interface methods:
> 
> 	G_DEFINE_TYPE_WITH_CODE (MamanBar, maman, GTK_TYPE_WIDGET,
> 	G_IMPLEMENT_INTERFACE (GTK_TYPE_IFACE, maman_bar_iface_init))

Not if GtkWidget already implements GtkExtendedLayout->get_min_size()
like this: GTK_WIDGET_GET_CLASS(instance)->get_min_size. Then you could
easily override the implementation in class_init(). I think this was
what Havoc meant.

Regards,
  Sven

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