Javadoc
Call forwarded from
DockStation#prepareDrop(StationDropItem).
This method calculates where to drop a new
Dockable.
This
SplitLayoutManager may or may not set the
CombinerTarget and
CombinerSource of
the created
PutInfo. If there is no combiner information but the mouse is over the center or the title
of a selected
Leaf, then the
SplitDockStation will create the missing information automatically.
If there is already information set, then the station will silently assume that this manager did set the information
and that the information is correct.