Hi,
I think you all have seen the visual distortion when opening e.g. Kickoff with
Sliding Popups effect (with blur effect it's very visible as you see the
blurred region before the dialog is shown). Today I tried around a little bit
and noticed that Lancelot is not showing this problem. So I looked a little
bit around the source code and changed the following:
Index: applet/applet.cpp
===================================================================
--- applet/applet.cpp (Revision 1117624)
+++ applet/applet.cpp (Arbeitskopie)
@@ -70,7 +70,7 @@
}
launcher = new Kickoff::Launcher(q);
- launcher->setAttribute(Qt::WA_NoSystemBackground);
+ launcher->setAttribute(Qt::WA_TranslucentBackground);
launcher->setAutoHide(true);
QObject::connect(launcher, SIGNAL(aboutToHide()), q, SLOT(hidePopup()));
QObject::connect(launcher, SIGNAL(configNeedsSaving()), q,
SIGNAL(configNeedsSaving()));
Restarted Plasma and the issue seems to be gone. Kickoff still does not show
instantly but it does not show the visual distortion and the second time
kickoff is opened it's fast and smooth.
So I looked around a little bit more and found the following code segment:
void DialogPrivate::themeChanged()
{
checkBorders(false);
const bool translucency = Plasma::Theme::defaultTheme()-
>windowTranslucencyEnabled();
// WA_NoSystemBackground is going to fail combined with sliding popups,
but is needed
// when we aren't compositing
q->setAttribute(Qt::WA_NoSystemBackground, !translucency);
updateMask();
}
The WA_TranslucentBackground attribute is set on Dialog, too.
If someone could confirm this observation and the comment in dialog.cpp is
right I'd say we go through the complete Plasma codebase and fix this annoying
issue :-)
Regards
Martin
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