Forward all key press events to the TabBox if it is currently grabbed and
connect the TabBox to the modifiers changed signal for checking if TabBox
should be ended.
Instead of having it's own QQmlEngine TabBox just uses the newly
exposed engine from Scripting and creates a new context for it's
own usage.
REVIEW: 116565
After changes in PlasmaCore.Dialog we can finally get rid of updating
the position on each visible change.
It's not 100 % perfect yet, seems the binding on screenGeometry is not
working properly. That needs investigation.
Used to be the QQuickView implementation for the tabbox. As it's now
controlled through opening windows from QML directly it's no longer
needed or used anywhere.
No longer needed in a Plasma2 world as the components have a thumbnail
component, so the hack to go over KWin to render the thumbnails is no
longer needed.
Approved by Aaron on mailinglist:
https://mail.kde.org/pipermail/active/2013-December/007254.html
By not using a QQuickView it becomes possible to just use a
PlasmaCore.Dialog or a Quick.Window in the TabBox qml and thus it's
possible to simplify the qml code.
To support this a new SwitcherItem is introduced and exported to QML.
It's a simple QObject providing all the properties which used to be
exported to the root context. A declarative TabBox is expected to
use one of these items. The C++ side finds the Switcher and for that
supports the case that the SwitcherItem is the rootItem or a child
item.
A declarative TabBox has also to create a QQuickWindow, e.g. a
PlasmaCore.Dialog. The visibility of that window should be controlled
through the visible property on the SwitcherItem. The underlying C++
implementation assumes that a TabBox only uses one window (it needs to
get destroyed once it's hidden and included in highlight windows).
Thanks to this change it's no longer needed to reload the TabBox
whenever it gets shown or the alternative TabBox gets shown. Instead
the same QML script can get reused. Other created switchers are ignored
as the visible property won't be changed to true.
