If set, all geometries will be reprojected from their original
coordinate reference system to the destination CRS while
iterating over features.
If a CRS has been set as the destination CRS, then the filterRect
parameter should be specified in the same CRS as this destination
CRS.
Additionally, a callback function can be specified on the request
to be called if a transform exception is encountered while
iterating over features.
This is designed to make it easier for scripts and plugins to
correctly reproject layers in an efficient and robust way, instead
of having to implement lots of repeated code themselves and
potentially missing some of the important considerations which
come with reprojecting geometries & bounding boxes.
Now, if a script wants the features from a layer in a specific
CRS, they can call:
crs = QgsCoordinateReferenceSystem('epsg:4326')
request = QgsFeatureRequest().setDestinationCrs(crs)
for f in layer.getFeatures(reqeuest):
print('geometry in 4326 is {}.format(f.geometry().exportToWkt()))
While it's not a QgsFeatureSource subclass (yet), it behaves
just like one so when can run the feature source conformance
test suite over it.
Fix a few minor issues identified by the test suite, and one
potential crash (requesting an invalid id from a cache iterator
crashes qgis)
Run the feature source tests over a layer with added, edited
geometries, and edited attributes unsaved in an edit buffer
Fix identified issues when iterating over these edited features
Previously this was always read from settings when using
QgsGeometryValidator. It's now an explicit argument
when constructing QgsGeometryValidator or calling the
static validation methods, allowing choice of internal/GEOS
validation methods.
Helps remove more QgsSettings use from core.
I have got caught by the default set to WGS 84 when I loaded a layer
in projected CRS, set extent to layer's extent and... nothing got rendered
because map renderer was reprojecting to WGS 84.
This default is closer to the default in 2.x where reprojection is turned off.
