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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 list_layer_collections(layer_collection, visible=False, selectable=False):
"""Returns a list of the collection and its children, with optional filtering by settings."""
if layer_collection.exclude:
return []
collection = layer_collection.collection
is_visible = not (layer_collection.hide_viewport or collection.hide_viewport)
is_selectable = is_visible and not collection.hide_select
if (selectable and not is_selectable) or (visible and not is_visible):
return []
found = [layer_collection]
for child in layer_collection.children:
found += list_layer_collections(child, visible, selectable)
return found
def filter_layer_collections_by_object(layer_collections, obj):
"""Returns a subset of collections that contain the given object."""
return [lc for lc in layer_collections if obj in lc.collection.objects.values()]
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
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