Transparency blacklist

[paulmcauley]

Some applications don't work well with the transparent headers feature ("Apply these opacity settings to entire Header area") and need to be blacklisted with an exception. This discussion is to track a list of applications that need to be blacklisted. Please add to this discussion if you find an application that needs to be added to the list.

Currently, the following applications are blacklisted:

Application name	Reason for blacklisting
VirtualBox	Entire window is black if Qt::WA_TranslucentBackground is set true
digiKam	Entire background was fully transparent if Qt::WA_TranslucentBackground was set true. Fixed as of digiKam 7.9+
Kdenlive	Video preview boxes fully transparent if Qt::WA_TranslucentBackground was set true. Fixed as of Kdenlive 23+

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Blacklists from other themes have also been tested, but either no problems were found or the software was too old to test.

Kvantum (https://github.com/tsujan/Kvantum/blob/master/Kvantum/style/themeconfig/default.kvconfig):
opaque=kaffeine,kmplayer,subtitlecomposer,kdenlive,vlc,smplayer,smplayer2,avidemux,avidemux2_qt4,avidemux3_qt4,avidemux3_qt5,kamoso,QtCreator,VirtualBox,VirtualBoxVM,trojita,dragon,digikam,lyx

Lightly (https://github.com/Luwx/Lightly/blob/master/kstyle/lightly.kcfg):

kscreenlocker,wine,vlc,kdevelop,smplayer,virtualbox,virtualboxvm,obs,kaffeine,kate,kstars,digikam,kdenlive