Until recently we have been only registering the border elements of the
graph, (so only the elements that don't have a neighboor). However this
lead to the situation that a scroller that is scrolled into the middle
(so not the x nor the y axis is scrolled to the max), is not accessable.
Now, we register all elements that have a neighboor in the outside.
The patch in the test suite is required in order to provide the correct
geometry to the implementation of efl_ui_focus_manager_sub.
Differential Revision: https://phab.enlightenment.org/D7360
the new api can be used to freeze the cache. This means, when the
widgets of the focus manager are all equally moved, the cache can stay,
cause the relative positions did not change, this enables a whole new
set of available optimizations.
Differential Revision: https://phab.enlightenment.org/D7348
it turns out to be very handy to have a interface for the moving and
border elements, that is unconnected to the way of how widgets are
registering themself.
This for example enables us to get a simple focus manager that just
redirects the call into a internal 2 dimensional data struct