Add a new "statistics" application state. In the statistics state
show the statistics widget and the filter in the top quadrants.
The idea is to allow filtering and doing statistics at the same
time.
Sadly, we can't use the filter-widget in different quadrants,
because Qt's ownership model is completely broken / inflexible.
It does not support a widget having different parents and
thus a widget can only belong to one QStackedWidget.
Hiding the map in the statistics view is quite hacky:
Since the view of the quadrants is not determined by the
"ApplicationState", we have to restore the original quadrant
visibility when exiting the stats mode. Therefore, set the
original visibility-state when changing application state.
The MainWindow-quadrant code really needs to be rewritten!
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The application state was encoded in a QByteArray. Thus, there was
no compile-time checking. Typos would lead to silent failures.
Turn the application state into an enum. Use the enum-class construct,
so that the values don't polute the global namespace. Moreover,
this makes them strongly typed, i.e. they don't auto-convert to
integers.
A disadvantage is that the enums now have to be cast to int
explicitly when used to index an array.
Replace two hash-maps in MainWindow to arrays of fixed sizes.
Move the application-state details into their own files.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
