Differential D4364 Diff 13707 rigify/utils/collections.py

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rigify/utils/collections.py

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				#====================== BEGIN GPL LICENSE BLOCK ======================
				#
				# This program is free software; you can redistribute it and/or
				# modify it under the terms of the GNU General Public License
				# as published by the Free Software Foundation; either version 2
				# of the License, or (at your option) any later version.
				#
				# This program is distributed in the hope that it will be useful,
				# but WITHOUT ANY WARRANTY; without even the implied warranty of
				# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
				# GNU General Public License for more details.
				#
				# You should have received a copy of the GNU General Public License
				# along with this program; if not, write to the Free Software Foundation,
				# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
				#
				#======================= END GPL LICENSE BLOCK ========================

				# <pep8 compliant>

				import bpy
				import math

				from .errors import MetarigError


				#=============================================
				# Collection management
				#=============================================

				def find_layer_collection_by_collection(layer_collection, collection):
				if collection == layer_collection.collection:
				return layer_collection

				# go recursive
				for child in layer_collection.children:
				layer_collection = find_layer_collection_by_collection(child, collection)
				if layer_collection:
				return layer_collection


				def ensure_widget_collection(context):
				wgts_collection_name = "Widgets"

				view_layer = context.view_layer
				layer_collection = bpy.context.layer_collection
				collection = layer_collection.collection

				widget_collection = bpy.data.collections.get(wgts_collection_name)
				if not widget_collection:
				# ------------------------------------------
				# Create the widget collection
				widget_collection = bpy.data.collections.new(wgts_collection_name)
				widget_collection.hide_viewport = True
				widget_collection.hide_render = True

				widget_layer_collection = None
				else:
				widget_layer_collection = find_layer_collection_by_collection(view_layer.layer_collection, widget_collection)

				if not widget_layer_collection:
				# Add the widget collection to the tree
				collection.children.link(widget_collection)
				widget_layer_collection = [c for c in layer_collection.children if c.collection == widget_collection][0]

				# Make the widget the active collection for the upcoming added (widget) objects
				view_layer.active_layer_collection = widget_layer_collection
				return widget_collection