Gtk4 and Wayland

[Kevin Rushforth]

This seems reasonable to me as well, at least for JavaFX since we 
already rely on Gtk for most of the windowing toolkit on Linux.

-- Kevin

On 9/1/2021 4:26 AM, Mario Torre wrote:
> On Wed, Sep 1, 2021 at 1:18 PM Johan Vos <johan.vos at gluonhq.com> wrote:
>> Hi Thiago,
>>
>> I was thinking (and experimenting) in the same direction, and so far that
>> is working good. I don't see disadvantages, but it would be good to find
>> out about it before we move forward.
>> Maybe the main issue to me is that GTK comes with lots of dependencies. We
>> already have that situation today, so it is not going to be worse. But if
>> we would use the Wayland protocol on a lower level (with a Wayland-specific
>> glass platform, instead of GTK), we could probably reduce the dependencies.
>> However, this comes at the price of creating *and maintaining* more
>> low-level code.
>>
>> I've been running GTK3 on Wayland and that works fine too. However, it
>> might be better to focus Wayland support for GTK4. I think there won't be
>> many installs that have no X11, but only Wayland, and that have GTK3 and no
>> GTK4.
> I tend to agree with you, I think we should consider this for Wakefield too.
>
> Cheers,
> Mario
>
>> - Johan
>> - Johan
>>
>> On Tue, Aug 31, 2021 at 11:03 PM Thiago Milczarek Sayão <
>> thiago.sayao at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I did some investigation on gtk4 and wayland.
>>>
>>> After some research I ended up with the conclusion that the best way is to
>>> do a separate gtk4 backend, that would support X11 and Wayland.
>>>
>>> This would be a good start:
>>> https://github.com/openjdk/jfx/pull/77/files
>>>
>>> Why?
>>>
>>> Gtk4 moves the decoration to the client side, which is GREAT since knowing
>>> the window size with decoration was a real pain.
>>>
>>> We probably won't want to do all the decoration work, Gtk does that, but on
>>> GtkWindow level, not GdkSurface (which replaces GdkWindow).
>>>
>>> Thus the move to use "more Gtk" (hence "less Gdk") which is exactly what
>>> the PR does. It also removes Applet code
>>>
>>> This is also a good starting point:
>>> https://gnome.pages.gitlab.gnome.org/gtk/gtk4/migrating-3to4.html
>>>
>>> --Thiago.
>>>
>