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tsujan / Kvantum

A Linux SVG-based theme engine for Qt and KDE
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translucency issue with qt5ct #148

Closed rbn42 closed 7 years ago

rbn42 commented 7 years ago

Hi, Is dolphin supposed to work with a transparent theme outside KDE5? Its background is not transparent on compiz0.8. But I tried some dirty hack on kvantum-qt5 0.10.4-1 to make it work.

Screenshots for pcman-qt, kate and dolphin Before before After after

tsujan commented 7 years ago

Kvantum's translucency doesn't depend on any DE; it just needs a compositor. So, yes, Dolphin can be translucent anywhere -- even under Enlightenment. No patch is needed for that.

This is Dolphin with Compiz under LXQt, styled by Kvantum:

dolphin

rbn42 commented 7 years ago

Hi tsyjan, Thank you for your quick reply. I am sorry, but dolphin+kvantum just dont work for my DE (compiz0.8 on updated ArchLinux), both pcman+kvantum and dolphin+qtcurve works. I am not very familiar with this, but IMO, Qt::WA_TranslucentBackground is not correctly set for the main window widget of dolphin and kate for any reason I can't imagine.

tsujan commented 7 years ago

compiz0.8 on updated ArchLinux

I use Compiz 0.8 (reloaded) too ;)

For Dolphin's view to be translucent, these conditions should be satisfied: (1) A Compositor (which you have); (2) A translucent window bg in the theme; (3) Translucency should be enabled under Kvantum Manager → Compositing & General Look; and (4) "Transparent Dolphin view" should be enabled under Kvantum Manager → Hacks.

Now, if you're sure that all the above conditions are fulfilled in your case, the only remaining possibility is that something may have changed in Dolphin -- which is very unlikely. Here, its version is 17.04.3-1. What is its version for you?

rbn42 commented 7 years ago

Yes, I think I have all these conditions satisfied, otherwise, pcman-qt can't be translucent too. Actually, while I am talking about dolphin, all programs from KDE5, like dolphin and kate, are not translucent. And my dolphin version is 17.04.3.

I am glad you are on compiz 0.8 too, so I am more confident now to try aggressively. It is qt5ct! I was using qt5ct to switch between breeze, kvantum and qtcurve. Skipping qt5ct and setting QT_STYLE_OVERRIDE=kvantum solved this issue.

tsujan commented 7 years ago

I was using qt5ct to switch between breeze, kvantum and qtcurve.

Interesting! I have no clue how qt5ct could interfere with Kvantum translucency for KDE apps but I'm sure that the problem should be in qt5ct because Kvantum treats all DE's equally.

Under any DE, you could install lxqt-qtplugin and set the environment variable QT_QPA_PLATFORMTHEME to lxqt and QT_STYLE_OVERRIDE to kvantum. You might also be able to control the style by using lxqt-config.

I am glad you are on compiz 0.8

Compiz 0.8 has a very high quality. I hope there will be good programs like it for wayland too but until wayland gets stable, I prefer Compiz to all other x11 compositors.

ShayBox commented 5 years ago

If you set QT_STYLE_OVERRIDE at all qt5ct wont apply its settings like double click, but without it set kvantum wont enable transparency on dolphin.

tsujan commented 5 years ago

qt5ct issues should be reported to its developer(s).

For any Qt widget style to work properly, there should be something called "Qt platform integration". Whether a DE has a decent Qt platform integration or not is outside my control. KDE and LXQt do.

ShayBox commented 5 years ago

Update if anyone was following this issue, perhaps if you know how to fix the issue internally here's your chance: https://sourceforge.net/p/qt5ct/tickets/65/

tsujan commented 5 years ago

Although this thread is old, since I mentioned Wayland in one place, I'd like to add that KWin's Wayland support has improved a lot since 2017. A nice and light blur effect, desktop cube, kwin scripts,... are supported under Wayland now. However, X11 is still the winner.