2025-07-01

scripts/addons/RetopoFlow/addon_common/common/globals.py

@@ -0,0 +1,52 @@
+'''
+Copyright (C) 2023 CG Cookie
+http://cgcookie.com
+hello@cgcookie.com
+
+Created by Jonathan Denning, Jonathan Williamson
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+'''
+
+'''
+This code helps prevent circular importing.
+Each of the main common objects are referenced here.
+'''
+
+class GlobalsMeta(type):
+    # allows for `Globals.drawing` instead of `Globals.get('drawing')`
+    def __setattr__(self, name, value):
+        self.set(value, objtype=name)
+    def __getattr__(self, objtype):
+        return self.get(objtype)
+
+class Globals(metaclass=GlobalsMeta):
+    __vars = {}
+
+    @staticmethod
+    def set(obj, objtype=None):
+        Globals.__vars[objtype or type(obj).__name__.lower()] = obj
+        return obj
+
+    @staticmethod
+    def is_set(objtype):
+        return Globals.__vars.get(objtype, None) is not None
+
+    @staticmethod
+    def get(objtype):
+        return Globals.__vars.get(objtype, None)
+
+    @staticmethod
+    def __getattr__(objtype):
+        return Globals.get(objtype)