Re: get_preferred_height_vfunc for Gtk::CellRenderer seems to have no effect on 3.14 to the mailing list gtkmm-list

[Krzesimir Nowak <qdlacz gmail com>]

2014-10-28 13:22 GMT+01:00 Gaute Hope <eg gaute vetsj com>:
> Excerpts from Gaute Hope's message of October 23, 2014 11:05:
> > Excerpts from Kjell Ahlstedt's message of October 23, 2014 10:58:
> > > Have you checked if your get_preferred_height_vfunc() is called?
> > > Perhaps now the get_preferred_height_for_width_vfunc() is called, and
> > > you need to override that function too. It might have changed, if some
> > > container widget has been changed between 3.12 and 3.14.
> >
> >
> > I did, it does get called. I also tried overriding
> > get_preferred_height_for_width_vfunc(), but to no avail. I have tried
> > just setting the value of minimum_height and natural_height to some
> > integer (5000), but it makes no difference in 3.14 (it does in 3.12).
>
>
> It turns out this was only a problem on my mac book pro with a retina
> screen (hidpi). When I overloaded the function:
>
>   get_request_mode_vfunc and return CONSTANT_SIZE or HEIGHT_FOR_WIDTH
>
> and also wrap:
>
>   get_preferred_width_vfunc (...)
>
> things work out. The return value of the latter functions seems to be
> irrelevant. But if I do not wrap it (and set the values to a positive
> int) I get an assertion failure upon runtime.
>
> Is this expected behaviour? If so, I could not find any documentation.

gtkmm is just a wrapper and by itself usually does not add any
policies, but instead it follows ones imposed by wrapped C library. In
this case it is GTK+. It is always good to consult the wrapped library
docs as a fallback. It has a section about geometry management[1].
Should be helpful in your case.

[1] https://developer.gnome.org/gtk3/stable/GtkWidget.html#geometry-management


> Cheers, Gaute
>
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