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I work frequently with Part/PartDesign primitives and it annoys me that I can define the offset using expressions but not the angle:
Therefore I wanted to add the missing expression feature but cannot figure out how. Has anybody a pointer for me please to learn how this is done?

As this angles are basically yaw/pitch/roll, I advise that you have a look at notes of issue #4106 and related links before getting started.

It seems that these are not enabled for expressions for the same reason as the Placement dialog is not expression aware: They are already calculated values.

openBrain wrote: ↑Thu Mar 19, 2020 10:30 pm As this angles are basically yaw/pitch/roll, I advise that you have a look at notes of issue #4106 and related links before getting started.

My question is not bound to these specific SpinBoxes, but in general: How do I add the expression feature to a SpinBox?

uwestoehr wrote: ↑Fri Mar 20, 2020 3:29 am My question is not bound to these specific SpinBoxes, but in general: How do I add the expression feature to a SpinBox?

https://github.com/FreeCAD/FreeCAD/blob ... rs.cpp#L97

All what's needed is to use the bind for the property you want to control. The ability to set expressions is done automatically.

wmayer wrote: ↑Fri Mar 20, 2020 7:41 am All what's needed is to use the bind for the property you want to control. The ability to set expressions is done automatically.

Many thank!