Review Request 111171: Deprecate (in)active(Title/Text)Color in favor of KColorScheme

[Kevin Ottens]

> On June 22, 2013, 10:58 a.m., Thomas Lübking wrote:
> > kdeui/util/kglobalsettings.cpp, line 308
> > <http://git.reviewboard.kde.org/r/111171/diff/1/?file=165092#file165092line308>
> >
> >     These are the colors for the window titlbar (with ambiguous function names, though), the default for activeTitleColor used to be #30AEE8 - that is blue!
> >     
> >     Now you want to return the active window background (ie. usually gray) - iow: enforce the color alignment that once caused the former KWin maintainer to for the oxygen deco into the new default ozone?
> >     
> >     I mean, decorations can still keep their internal color settings (what was somehow required because the titlebar color was initially happily removed from the color kcm - instead one could define the button color in listviews...), but the implication of this change is that the titlbar can no more be individually configured and *has* to align to the window background.
> >     
> >     -> The RR should clearly state that central color configuration for titlebars will ultimately be unsupported.
> >     
> >     Until then, the change can imo not go in before KF5 anyway, because it's a very visible behavioral change for users of Laptop, Plastik, BII and some legacy decorations (you still /can/ compile Quartz and Keramik and what they all were called) and pot. some distro specific decorations.
> 
> Aleix Pol Gonzalez wrote:
>     Are you sure these are being used? because I searched for uses of this API and I didn't see such uses.
> 
> Thomas Lübking wrote:
>     KWin reads the setting values by hand in libkdecorations/kdecoration_p.cpp - so actually I was wrong in that aspect: the change in KGlobalSettings will not have a visible impact here - no guarantee for 3rd party decos beyond bespin (esp. on custom config dialogs)
>     
>     Not sure whether this makes the change better, since now KWin will no longer reflect what KGlobalSettings reports.
>     I'm not sure how important it is to export those values via KGlobalSettings (i guess they existed to use the colors on MDI windows from KStyle), but even while deprecated, their behavior should not change.
>     And unless the conclusion is that titlebars shall align to the window content color, the advice should also not be to query that instead. It's better to state "information not avialable" than to give a false information.
> 
> Martin Gräßlin wrote:
>     It's worse - KWin does not just read the values by itself, it reads them from kwinrc instead of kdeglobals. So whatever is set in KGlobalSettings: KWin ignores it.
> 
> Thomas Lübking wrote:
>     No ;-)
>     Welcome to the magics of KConfig.
>     I for one have no [WM] entry in kwinrc, it's only in kdeglobal - try grepping it =)
>     However, KConfig resolves to kdeglobal for *every* rc unless explicitly told do do not, so <advert>
>     
>     kconfig kdeglobal/WM list
>     and
>     kconfig kwinrc/WM list
>     </advert>
>     
>     will print the same value (read from kdeglobal) unless you explicitly add a configuration to kwinrc (what's afaics not done anywhere - hopefully ;-)
> 
> Martin Gräßlin wrote:
>     wtf?!? I hate magic functionality
> 
> Thomas Lübking wrote:
>     Well, yes. The "magic" function here is the open flag:
>     http://api.kde.org/4.10-api/kdelibs-apidocs/kdecore/html/classKConfig.html#ad1f23964bbf8c11449e92a2596d15f7e
>     
>     One can either omit cascading (system wide files) or globals (kdeglobals)
>     Since the color and some WM settings were/are attractive from many points, it was/is reasonable to store them globally.
> 
> Aleix Pol Gonzalez wrote:
>     In any case, this seems broken to me.
>     
>     If you're really serious about this, we probably should just deprecate the function and advise users to just read the file directly if they want to access this data and move on.
> 
> Thomas Lübking wrote:
>     No, it's not broken at all - normal KConfig behavior, ever has been.
>     
>     If this shall be deprecated (can't say - i don't need them and don't care) your conclusion is however right:
>     the current behavior shall be preserved and the clients be advised to query the setting directly (as kwin does atm) for KF5.
>     
>     The "serious" part is that you were about to alter functionality in even frozen kdelibs and esp. imply a wider reaching change: fixed "titlebar == window background" assumption, ie. no titlebar colors - which, given the little war on oxygen back then, probably needs to be openly discussed before.
>     
>     Personally, i'd be fine moving the setting to kwin only - as MDI is a bug to begin with and the setting unlikely required by applications then.
>     I simply didn't want KWin to receive bugreports "plastik: colors no more supported" (what, as now  figured, would however only happen by withdrawing the color kcm setting on top of mentioned implication) and i *seriously* do not want to see such war as on ozone ./. oxygen ever again (so the idea to deprecate those color config triggered a button ;-)
>     /my2¢
> 
> Aaron J. Seigo wrote:
>     "I hate magic functionality"
>     
>     ... any sufficiently advanced technology *cough*
>     
>     As noted, this is documented behaviour and it serves a very real and very useful purpose: to allow global settings to be transparently available to (yet still be overridden by!) each application. It's a very simple and elegant way to allow for global behaviours to be configured without requiring such code in every application.
> 
> David Faure wrote:
>     Aaron is completely right. But of course the case of WM colors is a really bad one for kdeglobals. Having them there pollutes the KConfig (= eats more memory) in each application, which typically doesn't care for these settings.

Exactly, having KConfig also look in kdeglobals is definitely a magic we want to keep. Now in the case of those particular colors it's likely a kind of abuse, I'd like to see them moved to be kwin only. It looks like the best way forward.


- Kevin


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On June 22, 2013, 10:25 a.m., Àlex Fiestas wrote:
> 
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> 
> (Updated June 22, 2013, 10:25 a.m.)
> 
> 
> Review request for KDE Frameworks and kdelibs.
> 
> 
> Description
> -------
> 
> Deprecate: inactiveTitleColor, inactiveTextColor, activeTitleColor, activeTextColor in favor of KColorScheme and replace the implementation of those methods with it.
> 
> 
> Diffs
> -----
> 
>   kdeui/util/kglobalsettings.h 4b77ed5 
>   kdeui/util/kglobalsettings.cpp 3e60632 
>   khtml/misc/helper.cpp dccb9bf 
> 
> Diff: http://git.reviewboard.kde.org/r/111171/diff/
> 
> 
> Testing
> -------
> 
> I have compared the colors returned by the methods before and after this patch, they are close enough.
> 
> Additionally used some apps like filelight with the change, and it seems to work for them as well.
> 
> 
> Thanks,
> 
> Àlex Fiestas
> 
>

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