Enhancements for JavaFX 18

[Kevin Rushforth]

Johan can comment on the details, but I think that is a matter of 
investigation.

As with the AWT work which is under discussion, there are two related, 
but different deliverables that should be looked at:

1. Running the existing JavaFX GTK port on Wayland in X11 compatibility mode
2. A native JavaFX Wayland port

For both of them, we need a solution to the same "robot" problems that 
AWT and other libraries face (there is no standard way to control the 
mouse or to read pixels from the screen).

The fact that we already use GTK for most things should make #2 easier, 
and it might be able to share a lot of the code, but it very likely will 
need to be its ow backend, since it can't use X11.

In thinking out loud, one thing to consider might be to have a single 
glass GTK platform with different native libraries for Wayland and X11, 
since we already have that support to handle gtk2 and gtk3. Maybe 
something like:

gtk2 (legacy and only for X11)
gtk3-x11
gtk3-wayland
gtk4-x11
gtk4-wayland

Not sure whether that makes sense or not.

I imagine that 1 should be feasible in the JavaFX 18 time frame. A 
native Wayland port will be a lot of work, but since JavaFX already uses 
GTK for most things, it should be significantly less work than AWT will be.

-- Kevin


On 8/10/2021 8:24 AM, Thiago Milczarek Sayão wrote:
> Hi Johan,
>
> Would you prefer a pure Wayland backend or support it with gdk/GTK on top
> of the current glass backend?
>
> Cheers
>
> Em ter, 10 de ago de 2021 07:52, Johan Vos <johan.vos at gluonhq.com> escreveu:
>
>> I think we (everyone committing/reviewing in openjdk/jfx) did a great job
>> with the 17-work: an impressive amount of old and annoying bugs are fixed.
>> For 18 and beyond, I believe we have to keep working on those old issues --
>> at least if they are still relevant.
>> Also, I am 100% ok with the list of issues Kevin mentioned that need to be
>> moved forward now.
>>
>> Apart from that, I want to have support for Metal and Wayland in JavaFX 18.
>>
>> - Johan
>>
>> On Fri, Jul 30, 2021 at 2:58 PM Kevin Rushforth <
>> kevin.rushforth at oracle.com>
>> wrote:
>>
>>> Now that JavaFX 17 is in RDP2, we can turn more attention to bug fixes
>>> and enhancement requests for JavaFX 18. It's the summer, so there may be
>>> delays as some people are out at various times (including me), but I
>>> would like to get some of the outstanding enhancement requests moving
>>> over the next few weeks.
>>>
>>> Specifically, I'd like to see the following proceed:
>>>
>>> * Transparent backgrounds in WebView
>>> JBS: https://bugs.openjdk.java.net/browse/JDK-8090547
>>> PR: https://github.com/openjdk/jfx/pull/563
>>>
>>> * Add DirectionalLight
>>> JBS: https://bugs.openjdk.java.net/browse/JDK-8234921
>>> PR: https://github.com/openjdk/jfx/pull/548
>>>
>>> * CSS pseudoclasses :focus-visible and :focus-within
>>> https://bugs.openjdk.java.net/browse/JDK-8268225
>>> PR: https://github.com/openjdk/jfx/pull/475
>>>
>>> * Improve property system to facilitate correct usage (minus the binary
>>> incompatible API change)
>>> JBS: https://bugs.openjdk.java.net/browse/JDK-8268642
>>> PR: https://github.com/openjdk/jfx/pull/590 (Draft)
>>>
>>> And maybe the following:
>>>
>>> * Add CSS themes as a first-class concept (need a consensus on how to
>>> proceed)
>>>
>>> * Undecorated interactive stage style (still in early discussion, but
>>> the concept looks interesting and useful)
>>>
>>> There are probably others I'm forgetting.
>>>
>>> Each of the above should be discussed in their own thread on openjfx-dev
>>> rather than a reply to this thread.
>>>
>>> -- Kevin
>>>
>>>
>>>