[Qgis-developer] New Processing graphical modeler

[Victor Olaya]

Hi all,

I have been working on a new graphical modeler and Alex Bruy merged it
today into master (thanks Alex!)

It has some interesting new functionality (it allows to zoom in/out in the
modeler canvas, algorithms can be named, models can be nested without
limit, help strings are included int the model file...), but most of all is
a change that affects the modeler internally. The internal architecture has
been completely redesigned, and now it should be easier to extend it,
cleaner and easier to understand.

This has some drawbacks, however. There is no backwards compatibility, so
old models cannot be reused, and there might be some new bugs and issues. I
encourage everyone to test it and give feedback. I believe this is a very
important improvement, but it is a big one, and hopefully there will not be
too many issues with it.

Thanks in advance for your support.

Victor
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