[Qgis-developer] [Processing] translate parameter selection dropdown contents

[Arnaud Morvan]

Hello,

In processing algorithms, I want to translate the ParameterSelection 
dropdown contents.

I've tested two possibilities on SpatialJoin, which both operate,
and I want to get review before editing all algorithms :

First solution: use of QCoreApplication.translate('SpatialJoin', ...) in 
the class header:

https://github.com/arnaud-morvan/QGIS/commit/0daefe838c2b02c8a1bbeffdec551f578424b592

     With this form we have to specify context for each string.
     Translation is effectively made at import time because language is 
set before loading processing plugin.

Second solution: use self.tr method in the defineCharacteristics method :

https://github.com/arnaud-morvan/QGIS/commit/0286c3d95dffeee65ff7a6b7a69919d700815e4b

     With this form, we use the self.tr method at runtime on each 
defineCharacteristics call, like it is the case for name, group and 
parameters names.


I think that it is better to make translations at runtime, that is, in 
the defineCharacteristics method.

Does anyone have an opinion on this ?


Arnaud