With the removal of BoxSwitch all effects which want mouse events use the
fullscreen input window. The available functionality is too complex both
in EffectsHandler and in the Effects.
With this change only fullscreen input windows are supported and all
effects share the input window. This means there is at maximum one input
window. This simplifies the code in the Effects as they don't have to
keep track of the window they created any more. In EffectsHandler it
means that only one window needs to be created, destroyed and raised.
Also it means that we can properly react on screen size changes which had
been ignored in the past. Also quite some roundtrips to X are no longer
needed as we do not need to query the window geometry when creating the
input window.
REVIEW: 110156
The non-composited part handles the showWithX case with the four small
windows. The composited part shows a translucent QWidget with the
FrameSvg as done by the selection effect frame.
Outline connects to the Compositor toggled signal to switch the mode if
compositing gets suspended/resumed. This works fine also in the case that
the switch happens while the outline is shown. To support this Outline
is now a QObject and created with Workspace as a parent.
Given that the Outline handles both cases by itself, the outline effect
is no longer needed and is dropped together with all the hooks into the
effect system.
The usage has always been questionable as the thumbnails are
too small to properly recognize something.
Now BoxSwitch Effect has reach its end of life which would have
required to keep most of the code just for this thumbnail bar.
If required it would be better to integrate the normal QML based
TabBox to be rendered together with an effect.
BUG: 296070
FIXED-IN: 4.11.0
Tried to build KWin with enable final: it doesn't work. So if nobody uses
it, we don't need it in the CMakeLists to make it work.
Also it's removed in KF5 which means that removing it right now removes
differences in the build system.
REVIEW: 109357
