2ac5933 fixed the regression in 2.12, but there were more underlying
issues from <2.8 causing sub symbols with data defined properties
to be ignored.
Add some tests.
(refs #13707)
Rationale:
- there was a lot of large objects passed by value, so potentially
there's a speed bump from this
- even for implicitly shared classes like QString/QList there's still
a (small) cost for copying the objects when there's no reason to
- it's the right thing to do!
Allows for filling polygons with a tiled raster image. Options
include (data defined) file name, opacity, image size (in pixels,
mm or map units), coordinate mode (feature or view) and rotation.
- update methods of existing classes
- add comment to methods missing in the sip bindings
- split up collective sip files into single files and use
same directory structure in python/ as in src/
- add a lot of missing classes (some might not make sense because of
missing python methods in those classes)
- remove some non-existing methods from the header files
- add scripts/sipdiff
- replace some usages of std::vector and std::set with QVector/QSet
