On Sun, 2017-04-09 at 18:19 +0200, Lukáš Haberzettl wrote:

Ok, thak you for all the informations. And what about writing extension directly in code (c++)? It should be possible to write more complex UI right ? I have intermediate experience in C and C++ programming so it is not problem for me, but I want to know if its right way to do it.

This is possible and there are extensions in inkscape's codebase. Although I hesistate to call them plugins since they have to be compiled into the inkscape program.

Best Regards, Martin Owens