Make it possible for the individual tab-widgets to access the
parent widget. In principle this could have been done by
downcasting the pointer returned by parent(), but this makes
it explicit.
The goal here is to store information on the selection,
current dive, etc. without repeating it in every subwidget.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
On selection change, pass down selection (including current
dive and dc) to the tab widgets. Ultimately, this should
remove access to global variables. A number of new accesses
are marked as TODO. They shall be removed in due course.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
There was always this weird asymmetry that the "maintab" widget
is one of the tabs itself, whereas the additional tabs were
treated as extra-widgets. Turn the first tab into explicit
source files to make the distinction between container and
content clear.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
