Re: How should I use GtkHeaderBar without having a duplicate title bar on older platforms?

[Tristan Van Berkom <tvb gnome org>]

On Fri, Jul 26, 2013 at 7:27 AM, Dylan McCall <dylanmccall gmail com> wrote:
> For my GSoC project, I'm writing an application that uses
> GtkHeaderBar. Using Gtk 3.8, with libgd as a handy drop-in replacement
> for the new features in 3.9+, it looks like this:
> http://ubuntuone.com/0cr9GKuwrbULXMmL3eExmq

> From what I understand, using a GtkHeaderBar does not mean that it
will show up as a header bar for your application.

You could potentially use dozens of GtkHeaderBars, in list items
for example... but if you call gtk_window_set_titlebar() with a given
widget... that widget itself will show up in the title bar area of
the GtkWidget.

Coincidentally, a GtkHeaderBar widget happens to be a suitable
choice of widget type to use for gtk_window_set_titlebar().

Now what would make sense, is that GtkWindow probably
does not guarantee that gtk_window_set_titlebar() actually
does anything, nor does it guarantee that gtk_window_set_title()
does anything... but uses the user supplied titlebar if provided
and if there is support for client side windows in the given
platform.

Cheers,
    -Tristan


> As you can see, my application ends up with the title in two places,
> and I'm not sure how best to deal with that. I imagine I can detect
> whether I'm running in an environment that does client-side
> decorations and react accordingly, but then I'm still uncertain how
> the application is supposed to handle this. Is it better if the header
> just doesn't have a title in this case, or should I do something like
> System Settings 3.8 where the window titlebar has the primary title
> and the header bar has what would be the secondary title? Is there an
> API that can deal with this for me so I don't have to keep track of
> these special cases myself?
>
> By the way, I'm happy depending on just Gtk 3.9+, but as I understand
> it we still have to deal with the possibility that the window may or
> may not have a titlebar provided by the window manager.
>
> Thanks for any help!
>
> --
> Dylan
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