Sybren A. Stüvel
23b1f7de7d
The properties are still declared in the Python 3.5 compatible assignment notation, and a class decorator that converts those to class annotations as preferred by Blender 2.80.
71 lines
1.9 KiB
Python
71 lines
1.9 KiB
Python
"""Compatibility functions to support Blender 2.79 and 2.80+ in one code base."""
|
|
import functools
|
|
|
|
import bpy
|
|
|
|
|
|
if bpy.app.version < (2, 80):
|
|
SYNC_SELECT_VERSION_ICON = 'DOTSDOWN'
|
|
else:
|
|
SYNC_SELECT_VERSION_ICON = 'DOWNARROW_HLT'
|
|
|
|
|
|
# Get references to all property definition functions in bpy.props,
|
|
# so that they can be used to replace 'x = IntProperty()' to 'x: IntProperty()'
|
|
# dynamically when working on Blender 2.80+
|
|
__all_prop_funcs = {
|
|
getattr(bpy.props, propname)
|
|
for propname in dir(bpy.props)
|
|
if propname.endswith('Property')
|
|
}
|
|
|
|
def convert_properties(class_):
|
|
"""Class decorator to avoid warnings in Blender 2.80+
|
|
|
|
This decorator replaces property definitions like this:
|
|
|
|
someprop = bpy.props.IntProperty()
|
|
|
|
to annotations, as introduced in Blender 2.80:
|
|
|
|
someprop: bpy.props.IntProperty()
|
|
|
|
No-op if running on Blender 2.79 or older.
|
|
"""
|
|
|
|
if bpy.app.version < (2, 80):
|
|
return class_
|
|
|
|
if not hasattr(class_, '__annotations__'):
|
|
class_.__annotations__ = {}
|
|
|
|
attrs_to_delete = []
|
|
for name, value in class_.__dict__.items():
|
|
if not isinstance(value, tuple) or len(value) != 2:
|
|
continue
|
|
|
|
prop_func, kwargs = value
|
|
if prop_func not in __all_prop_funcs:
|
|
continue
|
|
|
|
# This is a property definition, replace it with annotation.
|
|
attrs_to_delete.append(name)
|
|
class_.__annotations__[name] = value
|
|
|
|
for attr_name in attrs_to_delete:
|
|
delattr(class_, attr_name)
|
|
|
|
return class_
|
|
|
|
|
|
@functools.lru_cache()
|
|
def factor(factor: float) -> dict:
|
|
"""Construct keyword argument for UILayout.split().
|
|
|
|
On Blender 2.8 this returns {'factor': factor}, and on earlier Blenders it returns
|
|
{'percentage': factor}.
|
|
"""
|
|
if bpy.app.version < (2, 80, 0):
|
|
return {'percentage': factor}
|
|
return {'factor': factor}
|