Andrea <mariofutire <at> googlemail.com> writes:
> Let me get it right.
> Some of the themes I find in the System Settings of KDE 4 are known not to
> work with KDE 4?
CrystalSVG will probably not work for KDE 4 as long as we don't find a way to
make it work for both KDE 3 and 4. Right now there's no version which fully
works with KDE 4 anyway. The other icon themes in kdeartwork are being migrated
to the new naming scheme, but the renaming isn't complete yet, so they don't
work with KDE 4 yet. Most third-party KDE icon themes are also for KDE 3 only.
> Why are they there?
Because there's no way to programmatically figure out what desktops the icon
theme was designed for. That's why we have the icon-naming-spec now. Some
history: there was at first a specification for how to name icon themes and how
to structure the directories. Both KDE and GNOME followed that specification,
however the problem was that the actual icon names were not standardized. So
you could in principle select a KDE theme in GNOME and the opposite, but it
wouldn't actually work properly. Current versions of GNOME and now also KDE 4
use a new standardized naming (icon-naming-spec). However, the specification
for how to structure the themes is still the same, so we can't programmatically
distinguish between the old and new themes.
An additional problem is that KDE 4 is the first desktop to implement the
fallback mechanism in the icon-naming-spec, where the first alternative for an
icon named foo-bar.png (before looking in other themes for the icon) is foo.png
in the default icon theme. This is why KDE 4 handles nonstandard themes
particularly badly (you'll get unfitting generic icons), older desktops just
falled back to the default theme in such cases (KDE 4 can do that too, but only
if there isn't a more generic icon in the theme you selected, and unfortunately
the old KDE 3 icon names are usually just one word, so they often get
accidentally picked up as fallbacks, e.g. edit.png gets used for any missing
edit-*.png).
> How do I know which ones are good?
You have to read the documentation for the icon theme to see what it supports.
There are few themes which support KDE 3, KDE 4 and GNOME at once, one such
theme is the Bluecurve theme (bluecurve-icon-theme), though it doesn't include
22×22 icons, only 24×24, so the icon rendering in KDE 4 is suboptimal. You may
have some success with icon-naming-spec-compliant icon themes designed
originally for GNOME.
Kevin Kofler
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