Review Request 116648: Split into one KCM for Desktop Effects and one for Compositing

[Hugo Pereira Da Costa]

> On March 7, 2014, 3:15 p.m., Hugo Pereira Da Costa wrote:
> > Hi Martin,
> > Any idea why the background behind the shells is flat ? Does it happend with all KCMs ?
> > (I'll double check asap but right now my systemsettings is crashing because my kauth is fubared. Links against incorrect pluggin, and qt4 and blows)
> 
> Thomas Lübking wrote:
>     Known QML issue (at least I bet this is)
> 
> Martin Gräßlin wrote:
>     clearly QtQuick issue
> 
> David Edmundson wrote:
>     Yes and no.
>     We're quite clearly hardcoding a solid background colour here:
>     Rectangle {
>         color: engine.backgroundViewColor()
>     }
>     
>     If QtQuickControls was working it wouldn't fix that.
>     But QtQuickControls doesn't handle the radial background yet, so it's kinda a moot point.
>     
>     It /might/ be possible to not set a background here, and set the QQuickView QWindow to be transparent and we'd see the radial background of the underlying KCM QWidget?
>
> 
> Thomas Lübking wrote:
>     According to the findings in some other RR: no.
>     QtQuick/QML is designed to be some scene (graph driven) and esp. if it uses HW acceleration, merging in the widget backingstore should pretty much defeat that approach - a solution in that direction (even on top of a Q*View patch) should be pretty "ugly" (rendering all widgets below into an image and importing that as background - needs to be redone whenever there's a paint event on any of the covered widgets)
>     
>     Also this cannot be resolved by hardcoding some gradient (then matching oxygen, but breaking plastique or qtcurve whch can have any random texture/watermark ...)

Naive question: since QtQuick/QML seems to have limitations, is there a reason for using QML in the compositor kcm, over widgets and ui files, that would not show the issue ? In the past I though using QML inside widgets was discouraged (but maybe this changed, or I missunderstood at that time) ? 

Also, I remember AFiestas patching both oxygen and some kde qml elements in order to pass some hints to the style so that things are rendered properly. I have no clue if doable at all (and maybe Alex should be cced here), but could a similar thing be done here to get proper background rendering ? (I can send to the relevant oxygen review requests if needed)


- Hugo


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On March 10, 2014, 9:03 a.m., Martin Gräßlin wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/116648/
> -----------------------------------------------------------
> 
> (Updated March 10, 2014, 9:03 a.m.)
> 
> 
> Review request for kwin, Plasma and Antonis Tsiapaliokas.
> 
> 
> Repository: kwin-compositing-kcm
> 
> 
> Description
> -------
> 
> Split into one KCM for Desktop Effects and one for Compositing
> 
> Let's try getting the KCM a little bit less scary by properly
> hiding everything the user doesn't have to care about. The prominent
> desktop effects KCM only contains the list of all the effects which
> can be configured and nothing else. Only exception is the disabled
> check after failed GL to make this easier for the user.
> 
> All the "advanced" settings are moved into a new KCM called
> "Compositing" which is put under the hardware component in
> systemsettings. This contains all advanced settings including
> * whether compositing is enabled at all
> * backend
> * animation speeed
> * scale filter
> * unredirect fullscreen
> * color correction
> 
> 
> Diffs
> -----
> 
>   CMakeLists.txt d70672f3937fb44240c2c2d8e2a8d90c67890e2a 
>   kcmkwineffects.desktop PRE-CREATION 
>   kwincompositing.desktop 88ecf46b393df947d6b59ce53c924a82fc65756a 
>   main.cpp 5c68722961be9b8a0a48f3221df7c033ba3cf946 
>   model.h 2efa2a9df63ee7f7ec483df004ff9530fdc0f852 
>   model.cpp 2b25fe04ccacf0fb719956b1b5fa0267611747e6 
>   qml/CompositingView.qml PRE-CREATION 
>   qml/EffectView.qml c1a66dfa41409ba04c4cf4ddded3d95bb4bfaef2 
>   qml/OpenGLErrorView.qml PRE-CREATION 
>   qml/main-compositing.qml PRE-CREATION 
>   qml/main.qml d22dd08da529df938d99ff9d43f52f7b33a7f2d3 
> 
> Diff: https://git.reviewboard.kde.org/r/116648/diff/
> 
> 
> Testing
> -------
> 
> 
> File Attachments
> ----------------
> 
> New advanced compositing KCM
>   https://git.reviewboard.kde.org/media/uploaded/files/2014/03/07/e20bc5a1-c873-497a-b005-efb6b58da7c5__kcmcompositing.png
> New effects KCM
>   https://git.reviewboard.kde.org/media/uploaded/files/2014/03/07/0d6c955e-fdd2-4a84-91b4-53959f2745f5__kcmeffects.png
> Effects KCM with GHNS button
>   https://git.reviewboard.kde.org/media/uploaded/files/2014/03/07/f467b643-5341-4cfe-8282-eeea93bc98e5__kcmeffects.png
> Latest kcmcompositing screenshot
>   https://git.reviewboard.kde.org/media/uploaded/files/2014/03/10/70df036e-f3ad-455d-a323-c8f36220afd4__kcmcompositing.png
> 
> 
> Thanks,
> 
> Martin Gräßlin
> 
>

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