[Bf-committers] Custom Properties - python issues

[Tom Edwards]

Oops. For "type" read "bpy.types".

On 01/01/2011 10:22, Tom Edwards wrote:
> I'm with you on then name length limitation, that's annoying. Otherwise,
> here is how to create and display a proper custom value:
>
>> type.Scene.my_prop = BoolProperty(name="A boolean
>> property",description="Blah",default=False)
>> # ...
>> layout.prop(scene,"my_prop",text="A UI property element")
> There is also StringProperty, IntProperty, EnumProperty and many more;
> check bpy.props. You can probably use CollectionProperty to store a dict
> (or at least a list) but I've never tried.
>
> I didn't try reading your code sample because your line breaks have
> disappeared.
>
> On 01/01/2011 9:41, Hart's Antler wrote:
>> 1. KeyError: 'the length of IDProperty names is limited to 31 characters'object['x'*32] = 'why not make the limit 32 or 64?, 31 is an odd number - not possible to use md5sum hashes either as a workaround'
>> 2. inner single quotes are invalid## this failslayout.prop( object, "['my-custom-prop']" )		# a better warning should be printed, or single quotes should be supported## this works - double quotes must be usedlayout.prop( object, '["my-custom-prop"]' )
>> 3. dicts are allowed, but layout.prop(...) can not show each subkey on its own## (the dict can be viewed as a string from Custom Properties Panel, but thats not very useful for the user) ##object['x'] = {'a':1, 'b':2}box.prop( object, '["x"]["a"]' )		# error: rna_uiItemR: property not found: Object.["x"]["a"]box.prop( object, '["x"]' )		# this also fails
>>
>> 4. booleans not supported by custom propertiesobject['my-custom-prop'] = True		# converted to 1 without any warninglayout.prop( object, '["my-custom-prop"]', toggle=True )	# toggle is ignored, numeric entry is displayed instead
>> ## workaround ##class mypanel(bpy.types.Panel):	bl_space_type = 'PROPERTIES'	bl_region_type = 'WINDOW'	bl_context = "object"	bl_label = "toggle custom prop example"	@classmethod	def poll(cls, context): return True	def draw(self, context):		layout = self.layout		ob = context.active_object		tag = 'my-custom-prop'		if tag not in ob.keys(): ob[tag] = True		v = ob[tag]		if v: icon = 'CHECKBOX_HLT'		else: icon = 'CHECKBOX_DEHLT'		op = layout.operator( 'toggle_prop', text=tag, icon=icon )		op.propname = tag
>> class toggle_prop_op(bpy.types.Operator):                	'''operator: prop toggle helper'''  	bl_idname = "toggle_prop"  	bl_label = "toggle"                    	bl_options = {'REGISTER', 'UNDO'}	propname = StringProperty(name="property name", description="...", maxlen=32, default="")	@classmethod	def poll(cls, context): return True	def invoke(self, context, event):		ob = context.active_object		ob[ self.propname ] = not ob[ self.propname ]		return {'FINISHED'}
>>
>>
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