which are subrenderers for other renderers
Symbol layers have no effect in this situation (e.g. when a categorized
renderer is used as a subrenderer for point displacement renderer), so
don't show the option in the GUI
Instead of directly changing the renderer in place in the symbol levels
widget, we delegate responsibility for handling the changes to symbol
levels to the parent QgsRendererWidget subclass. This allows us to
implement different logic in the various subclasses which correctly
handle how that particular widget subclass should update any internal
symbol references and ultimately update the renderer.
Fixes instability and crashes after editing symbol levels.
Fixes#42671
- Add enums to qgis.h instead of qgscoreenums, so that they belong to
a Qgis namespace
- Split up the various symbol headers into multiple files so that we
can fine-tune their inclusion and forward declare more readily, speeding
up recompilation
- Move QgsSymbol enums to qgis
For the c++ api dox this expands to "\c nullptr" (the
\c directive indicates a code literal value), and for sipify/Python
it expands to ``None`` (`` is sphinx annotation for literal values)
Makes for nicer dox for both c++ and Python!
