The existing desktop switcher becomes the first available layout called
"informative". For both variants of desktop switchers a new config key is
introduced to define the desktop switcher layout.
Desktop layouts are installed into a different directory than window
switcher layout and use a different service type.
For the moment it's basically a hidden config option as there are no
further layouts yet.
BUG: 296068
FIXED-IN: 4.11
REVIEW: 110021
To support this feature the DesktopModel is turned into a tree model with
the desktops on the root level and the Client's at the next level.
In the view a VisualDataModel is used which kind of supports a tree model
by setting the root index. A list view is added underneath all the
desktops showing the icons of the windows on the desktop one switches to.
BUG: 306187
FIXED-IN: 4.11
REVIEW: 108445
In effects it's obvious that compositing is enabled, so specifying the
translucent element is no problem.
In tabbox a context property "compositing" is injected which decides
whether "translucent" or "opaque" elements should be used. Here the
translucent elements are only used if the Blur effect is available - for
this a new Effect::Feature Blur is introduced and in addition it is
tested whether the theme provides the translucent element.
Also the masking is adjusted to ensure that only the shadow is not
blurred.
Reason for this change is that Plasma theme seems not always to pick up
whether compositing is used when used from inside KWin. It does not cover
the Desktop Change OSD which uses PlasmaCore.Dialog and there we cannot
(yet) inject that we use compositing.
Overall I'm quite unhappy with this patch and I do hope we can fix it in
the proper place in the lifetime of 4.10 and revert this patch.
CCBUG: 311995
REVIEW: 108438
due to plasma change, shadow is not included by default, hence kwin
tabbox need to handle shadow by itself, and due to kwin is compositor
and have shadow as effects, it's not a good idea to use X property to
pass shadow from kwin to X and to kwin. This change use the old way to
draw shadow side the tabbox, and partly move the blur region setting to
qml.
REVIEW: 108243
