In order to be able to correctly size the chart type popup, we'll need
access to the total count or rows as a property that signals changes to
QML.
The hack to use rowCount() as the READ function requires that rowCount()
can be called without argument, therefore the addition of a default
parent.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
For QML, the roles have to be associated dynamically with
name. Moreover, the model has to be registered as a QML
type to make it accessible from QML.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Qt's comboboxes are controlled by models, there's no way around
that. To customize the chart-selection widget this must therefore
be abstracted into a model. On the upside, this hopefully can
be used for desktop and mobile.
The model provides icons and paints a warning-symbol on it
if the statistics core code deems the chart to be not recommended.
Notably, when plotting a categorical bar chart against a
numerical value (in such a case histograms are preferred).
Includes a fix for a silly oversight in CMakelist.txt: add the
statstranslations.h header.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
