> > How do they decide if they should use GTK 3 or GTK 2?
I had to research this, but apparently they made a cut-over at some point. https://bugs.openjdk.java.net/browse/JDK-8198649 (not attempting to minimize the problem, just wanted to isolate it from what we're discussing) And even if someone decides to standardize it and sends merge requests > to all major desktop environments, it will still take ages before it is > widely available. That's an unfortunate truth which is why I was hoping for an alternative way to detect this. At time of writing this, Ubuntu's the only one I've found modifying XDG_CURRENT_DESKTOP and keep something indicative of Gtk inside e.g. (ubuntu:GNOME). I assume that's because they've ditched Unity and are finally back to using Gnome, but in a customized form; whereas the others are simply Gtk-based and use their own name. It would be nice to have a consensus on a long-term supported property that exposes the presence of a running Gtk-based desktop to application developers. Even if such a value provides presumptuous information, it's information, which is valuable. If this consensus were agreed upon, the 80/20 stop-gaps of the world would become the new "deprecated; a path to detection would be sanctioned, instead of a mispurposed one. - tres.finocchi...@gmail.com On Wed, Apr 29, 2020 at 5:40 PM <jtoj...@gmail.com> wrote: > On Wed, 2020-04-29 at 17:03 -0400, Tres Finocchiaro wrote: > > > The best you can do is have a mapping of common DEs to their > > > preferred > > > toolkits > > > > This would mean each Gtk-based DE will require a patch to OpenJDK, > > which is unsustainable. > > I agree that this is inconvenient but in the absence of a better > option, you either make a list, or come up with some heuristic. > > > > There is no such thing as GTK desktop > > > > Wikipedia has its own category: > > https://en.wikipedia.org/wiki/Category:Desktop_environments_based_on_GTK > > But that is only what people see. Desktops do not care about toolkits, > only thing that matters is that the app can connect to the desktop’s > display server. > > And while it would be possible to make desktops record the consensus on > the preference of toolkits in their respective communities and expose > it via some API like an environment variable, someone would need to > come up with the API and then convince all desktop environments it is > something they should implement. > > Given the limited usefulness of such API, I do not see anyone spending > time on that effort. > > And even if someone decides to standardize it and sends merge requests > to all major desktop environments, it will still take ages before it is > widely available. > > > In regards to Gtk2 versus Gtk3 binding, those issues haven't changed > > as results of this missing variable. > > How do they decide if they should use GTK 3 or GTK 2? > > > I'm not sure I understand the reluctance to provide such information. > > I do not think anyone is opposed to that but I doubt anyone will > consider it a priority. Especially since the intersection of > toolkits supported by AWT and toolkits prefered can be emulated using > much simpler algorithm. > > preferred | GTK | Qt | EFL > ----------|-----|-----|-----| > has GTK | GTK | GTK | GTK | > no GTK |error|Motif|Motif| > >
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