from project labeling settings
This is an unnecessary setting, resulting in 1000's of extra, very complex
and untested lines of code. Furthermore, the differences are almost non-existant
and it's extremely unlikely end users would (or should) need to change this
setting.
Adds an interface for classes which provider custom
handlers for features rendered as part of a map render job.
QgsRenderedFeatureHandlerInterface objects are registered
in the QgsMapSettings objects used to construct map render
jobs. During the rendering operation, the handleRenderedFeature()
method will be called once for every rendered feature, allowing
the handler to perform some custom task based on the provided
information.
They can be used for custom tasks which operate on a set of
rendered features, such as creating spatial indexes of the
location and rendered symbology bounding box of all features
rendered on a map.
This new setting, "Simplify geometries to reduce output file size",
is exposed in the SVG or PDF export settings dialogs shown when
exporting a layout/atlas/report to PDF or SVG.
If checked (the new default), geometries will be simplified while exporting
layouts in order to remove any redundant vertices which are not
discernably different at the export DPI. (e.g. if export DPI is 300 dpi,
vertices less then 1/600 inch different from each other will be removed).
This avoids exporting ALL geometry vertices during PDF/SVG export,
which can result in a ridiculously complex and large export file size.
Aside from the file size issues, it also causes problems when trying
to load these outputs into other applications, e.g. Inkscape, which
chokes on the huge number of vertices and grinds to a crawl.
Sponsored by the GeoPDF export group
QgsMapSettings object
If specified (they default to off), these simplification settings
will override any layer-specific simplification settings, and
provide a way for specifying a global simplication to apply
to vector layers while exporting maps.
coordinate operations when selecting operations
This is the closest equivalent for the existing "hide deprecated"
checkbox which is available in proj < 6 builds.
Requires Proj >= 6.2
QgsPathResolver::setPathPreprocessor allows setting a custom path pre-processor
function, which allows for manipulation of paths and data sources prior
to resolving them to file references or layer sources.
The processor function must accept a single string argument (representing the
original file path or data source), and return a processed version of this path.
The path pre-processor function is called before any bad layer handler.
Example - replace an outdated folder path with a new one:
def my_processor(path):
return path.replace('c:/Users/ClintBarton/Documents/Projects', 'x:/Projects/')
QgsPathResolver.setPathPreprocessor(my_processor)
Example - replace a stored database host with a new one:
def my_processor(path):
return path.replace('host=10.1.1.115', 'host=10.1.1.116')
QgsPathResolver.setPathPreprocessor(my_processor)
Example - replace stored database credentials with new ones:
def my_processor(path):
path= path.replace("user='gis_team'", "user='team_awesome'")
path = path.replace("password='cats'", "password='g7as!m*'")
return path
QgsPathResolver.setPathPreprocessor(my_processor)
Attempts to allocate memory for at least the specified number of geometries.
If the number of geometries is known in advance, calling this function
prior to adding geometries will prevent reallocations and memory fragmentation.
