Icons installed by apps

[Jaroslaw Staniek]

On 24 September 2015 at 22:54, Jaroslaw Staniek <staniek at kde.org> wrote:
> Dear All,
> One more question about the theme setting behaviour or philosophy. In
> a Plasma4 session I am using a custom prefix for KF5 libs and
> KF5-based apps.
>
> Then in $XDG_CONFIG_HOME/.config5/kdeglobals editing setting
>
> [Icons]
> Theme=....
>
> does not seem to mean anything to these apps.
>
> Also having all the XDG_* variables set, while using systemsettings
> (from Plasma4, I am testing support for non-Plasma5 environments) to
> alter the icon theme I naively thought the kdeglobals file would be.
> No, the host's "Plasma4's system" kdeglobals is altered instead.
>
> Why this behaviour? Is there any way to change icon theme in a local
> PREFIX I use for KF5 software without altering the host's theme and
> without using Plasma5 sessions?

One detail that adds more spice here: KIconTheme::current() naturally
returns what we I have in $XDG_CONFIG_HOME/.config5/kdeglobals. So
theme set in host's "Plasma4's system" kdeglobals is used for standard
icons, and my custom icons depend on KIconTheme::current().

All what I said is tested with
PREFIX/lib64/plugins/platformthemes/KDEPlatformTheme.so removed.

Given multitude of scenarios I am really afraid of predictability of
the result. People can have the old installation aside of new ones, in
completely different config dirs, so I guessed it would be fine. Not
saying it's the case but expecting users to more or less deeply
refresh the OS configuration sounds a bit too Windows-y to me: I'd
expect some separation. Well, integration can be harder than coding :)

-- 
regards, Jaroslaw Staniek

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