Selection modifiers

[maciejgornicz]

My first Open-source contribution :)

Related to #40
Added features with shortcuts:

select inverse [CTRL + i]

self-explained

select extend [CTRL + e]

Works different than in blender selecting-modes
This one selects next entities in chain

select extend all [CTRL + SHIFT + e]

Selects all entities in chain

[hlorus]

Thanks for the PR, this really feels great!

I've experienced an issue when a circle is present:
Traceback (most recent call last): File "/home/yoga/Dropbox/blend/addons/CAD_Sketcher/operators/select.py", line 89, in execute while select_extend(context): File "/home/yoga/Dropbox/blend/addons/CAD_Sketcher/operators/utilities.py", line 65, in select_extend if e.p1.selected or e.p2.selected: AttributeError: 'SlvsCircle' object has no attribute 'p1' Error: Python: Traceback (most recent call last): File "/home/yoga/Dropbox/blend/addons/CAD_Sketcher/operators/select.py", line 89, in execute while select_extend(context): File "/home/yoga/Dropbox/blend/addons/CAD_Sketcher/operators/utilities.py", line 65, in select_extend if e.p1.selected or e.p2.selected: AttributeError: 'SlvsCircle' object has no attribute 'p1'

Also it would be great to list the new shortcuts in the documentation, there's already some hints for the selection tool in docs/tools.md.

Hope to see you around :)

[hlorus]

Sorry to bother you again..

[amrsoll]

All in all, cool feature to have, good work 😄

[hlorus]

Just note some small details. IMO this can be merged if @amrsoll is also fine with the current state.
Thanks alot for the work all!

[amrsoll]

Minor changes because of unused imports :)

[amrsoll]

All good for squash merge :) thank you for the contribution!

[hlorus]

🎉🎊
Alright then, i'm gonna merge this. Thanks @maciejgornicz for the patience!