create expression context scopes
Allows algorithms which require the underlying layer scope
to operate correctly when running in selected features only
mode.
Fixes#17170
in a feature-based algorithm, don't try to continue processing
remaining features
Avoids multiple error dialogs appearing for every feature
in a layer...
Because Python code cannot catch and rethrow c++ exceptions
without losing context, we end up getting unknown exceptions
caught by c++ from python code (phew!).
So if we catch a python exception from processing, throw it
into the log so at least there's the full debugging detail
available on the console.
(Not ideal. Would love to see a PR allowing the full error
message to be passed correctly between c++/python/back again)
Allows algorithms to pre-processes a set of parameters, allowing the
algorithm to clean their values.
This method is automatically called after users enter parameters, e.g.
via the algorithm dialog. This method should NOT be called manually
by algorithms.
Also:
- move doxygen comments to header files so that they get included
in Python docstrings
- remove duplicate doxygen implemented in both header and footer
- remove some redundant doxygen for overridden methods
- add some missing docs
ModelerParametersDialog and ParametersPanel have to keep list of
wrappers only. widget and label( if needed) are created through
WidgetWrapper.createLabel()
Provides a simple method for fetching remote HTTP
content in a QgsTask. Utilises QgsNetworkContentFetcher so
Url redirects and progress reports are automatically handled.
- we gain all of the styling capabilities of our text renderer engine (i.e. what powers
the rendering of labels)
- HTML support is gone for now, with virtually all of styling possibilities
covered by the above text renderer
Includes project metadata in PDF exports, and supported image
based formats.
Image based metadata support depends on the format and the
Qt library's handling of each particular format (e.g. PNG
outputs are well supported).
Developed for Arpa Piemonte (Dipartimento Tematico Geologia e Dissesto)
within ERIKUS project
