VCL selection

[Gwyn Ciesla]

Interesting. Would you recommend waiting to set gtk4 as default, or would doing so spur correction of extant issues?



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Gwyn Ciesla
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On Wednesday, March 6th, 2024 at 2:59 PM, Caolán McNamara <caolan.mcnamara at collabora.com> wrote:

> On Wed, 2024-03-06 at 20:00 +0000, Gwyn Ciesla wrote:
> 

> > Hi all! Fedora is looking at changing the default VCL plugin used for
> > the interface for various desktop environments, specifically gtk4 for
> > GNOME and kf6 for KDE. I'm able to choose the plugin by settting
> > SAL_USE_VCL_PLUGIN, but when I have several installed and remove gtk3
> > it defaults to X11, so I'm not sure how it makes that choice.
> 

> 

> Probably vcl/source/app/salplug.cxx, where we set the order of plugins
> to use, and if gtk4 was desirable as one to auto-use it would be
> inserted into the list there beside "gtk3". Its absence from there is
> why you have to "force" it via SAL_USE_VCL_PLUGIN
> 

> FWIW AFAIK the gtk4 accessibility experience is still subpar to the
> gtk3 experience. And I think some of the obvious dropdowns, the font
> and style ones in writer, don't render their entries as previews, only
> as simple text.
> 

> Worth mentioning I guess is that the dialogs and other UI bits are
> generally runtime converted from the basically-gtk3-format .ui files
> into gtk4 equivalents. That sort of requires keeping to a uniform
> pattern to make that conversion work. Which is basically what the
> bin/ui-rules-enforcer.py is for. So if you get warnings/errors like:
> 

> GtkInstanceBuilder: error when calling gtk_builder_add_from_string
> 

> then the idea is; either that script can be run over the offending .ui
> file and/or the script updated for whatever new problem has emerged and
> then run over the offending .ui :-)
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