Fixes#21986
plus:
- fix multiple string keys with commas in value relation widget
- more robust JSON and array (un)marshalling
- uniform array representation in value relation widgets
- lot of test coverage
- automatic QVariant type conversions in JSON utils
* update Travis to build on Trusty for code layout
* fix shellcheck replace ! -z by -n
* shellcheck: fix -n doesn't work with unquoted arguments
* more shellcheck fixes
* use bash instead of posix
Previously, annotation size and position always used pixel units. This
did not work well when exporting layouts, resulting in tiny annotations
(it also caused issues when moving projects between hidpi/non hidpi
displays).
Instead, use millimeters for annotation size and position so that the
appearance is consistent across displays and works correctly in layout
exports.
Add lots of unit tests covering this.
Fixes#18373
This provider option was linked to the project level option
"Trust layer metadata..." which was implemented
to speed up loading of large dataset by trusting extent
read from metadata to avoid costly operations to determine
the layer extent.
Check PK unicity on the other hand has only effect on views
and query layers and it is useful as an independent
option to prevent loading of layers that have no PK (or the
wrong one).
But the operation of determine unicity of a values in a column
can also be costly, so better to get control back to the user.
Legacy default is preserved (the project-level "Trust..." option).
Fixes#21839
Funded by RAAB.nl
In OGC WMS standard, the empty string represents the default style.
QGIS Server when it parses the parameters, QGIS Server when it parses parameters it removes empty parts.
When all requested styles are default ones it's equal to an empty parameter STYLE, as defined in the standard.
When only one layer is requested, there is no issue with custom or default style.
When multiple layers are requested and some with custom styles, because QGIS Server does not retain empty strings, it loses the layer / style match.
To fix it, keeps empty parts for not empty styles parameters.
