When the show_unused_cylinders flag is not set, the cylinder tables
in the equipment tab and the planner should not show unused cylinders.
However, the code in CylindersModel is fundamentally broken if the
unused cylinders are not at the end of the list: The correct number
of cylinders is shown, but not the correct cylinders.
Therefore, add a higher-level CylindersModelFiltered model on top
of CylindersModel that does the actual filtering. Some calls are
routed through to the base model (notably those that take indexes,
as these have to be mapped), for some calls the caller has to get
access to the source model first. We might want to adjust this.
For filtering, reuse the already existing show_cylinder function
and export it via CylindersModel.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Most tabs in the dive-information widget have there own translation
units and ui-files. Only the equipment tab was married with the
main tab. Move it out to get more reasonably sized translation units
and some isolation.
Currently, this needs ugly hacks when entering / checking for edit
mode: Access to MainTab is via the MainWindow. And vice/versa, when
accessing the DiveEquipmentTab from the MainTab, the former is
hardcoded as the first item of an array.
These hacks will soon be removed though, when making equipment
editing undoable. The tabs will then be independent.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
