90 lines
2.1 KiB
Python
90 lines
2.1 KiB
Python
"""
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Get/Set Example
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+++++++++++++++
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Get/Set functions can be used for boolean, int, float, string and enum properties.
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If these callbacks are defined the property will not be stored in the ID properties
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automatically, instead the get/set functions will be called when the property is
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read or written from the API.
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"""
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import bpy
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# Simple property reading/writing from ID properties.
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# This is what the RNA would do internally.
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def get_float(self):
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return self["testprop"]
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def set_float(self, value):
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self["testprop"] = value
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bpy.types.Scene.test_float = bpy.props.FloatProperty(get=get_float, set=set_float)
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# Read-only string property, returns the current date
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def get_date(self):
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import datetime
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return str(datetime.datetime.now())
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bpy.types.Scene.test_date = bpy.props.StringProperty(get=get_date)
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# Boolean array. Set function stores a single boolean value, returned as the second component.
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# Array getters must return a list or tuple
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# Array size must match the property vector size exactly
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def get_array(self):
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return (True, self["somebool"])
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def set_array(self, values):
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self["somebool"] = values[0] and values[1]
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bpy.types.Scene.test_array = bpy.props.BoolVectorProperty(size=2, get=get_array, set=set_array)
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# Enum property.
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# Note: the getter/setter callback must use integer identifiers!
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test_items = [
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("RED", "Red", "", 1),
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("GREEN", "Red", "", 2),
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("BLUE", "Red", "", 3),
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("YELLOW", "Red", "", 4),
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]
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def get_enum(self):
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import random
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return random.randint(1, 4)
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def set_enum(self, value):
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print("setting value", value)
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bpy.types.Scene.test_enum = bpy.props.EnumProperty(items=test_items, get=get_enum, set=set_enum)
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# Testing
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scene = bpy.context.scene
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scene.test_float = 12.34
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print(scene.test_float)
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scene.test_array = (True, False)
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print([x for x in scene.test_array])
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# scene.test_date = "blah" # this would fail, property is read-only
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print(scene.test_date)
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scene.test_enum = 'BLUE'
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print(scene.test_enum)
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# >>> 12.34000015258789
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# >>> [True, False]
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# >>> 2013-01-05 16:33:52.135340
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# >>> setting value 3
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# >>> GREEN
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