1 files changed, 123 insertions, 0 deletions
diff --git a/release/scripts/modules/nodeitems_utils.py b/release/scripts/modules/nodeitems_utils.py
new file mode 100644
index 00000000000..2fa9eef09bc
--- /dev/null
+++ b/release/scripts/modules/nodeitems_utils.py
@@ -0,0 +1,123 @@
+# ##### 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
+from bpy.types import Menu, Panel
+
+
+node_categories = []
+
+
+class NodeCategory():
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    @property
+    def items(self):
+        if hasattr(self, '_items'):
+            return self._items
+        elif hasattr(self, '_itemfunc'):
+            return self._itemfunc(self)
+
+    def __init__(self, identifier, name, description="", items=[]):
+        self.identifier = identifier
+        self.name = name
+        self.description = description
+        if callable(items):
+            self._itemfunc = items
+        else:
+            self._items = items
+
+class NodeItem():
+    def __init__(self, nodetype, label=None, settings={}):
+        self.nodetype = nodetype
+        self._label = label
+        self.settings = settings
+
+    @property
+    def label(self):
+        if self._label:
+            return self._label
+        else:
+            # if no custom label is defined, fall back to the node type UI name
+            return getattr(bpy.types, self.nodetype).bl_rna.name
+
+
+# Empty base class to detect subclasses in bpy.types
+class NodeCategoryUI():
+    pass
+
+
+def register_node_ui():
+    # works as draw function for both menus and panels
+    def draw_node_item(self, context):
+        layout = self.layout
+        for item in self.category.items:
+            op = layout.operator("node.add_node", text=item.label)
+            op.type = item.nodetype
+            op.use_transform = True
+
+            for setting in item.settings.items():
+                ops = op.settings.add()
+                ops.name = setting[0]
+                ops.value = setting[1]
+
+    for cat in node_categories:
+        menu = type("NODE_MT_category_"+cat.identifier, (bpy.types.Menu, NodeCategoryUI), {
+            "bl_space_type" : 'NODE_EDITOR',
+            "bl_label" : cat.name,
+            "category" : cat,
+            "poll" : cat.poll,
+            "draw" : draw_node_item,
+            })
+        panel = type("NODE_PT_category_"+cat.identifier, (bpy.types.Panel, NodeCategoryUI), {
+            "bl_space_type" : 'NODE_EDITOR',
+            "bl_region_type" : 'TOOLS',
+            "bl_label" : cat.name,
+            "category" : cat,
+            "poll" : cat.poll,
+            "draw" : draw_node_item,
+            })
+        bpy.utils.register_class(menu)
+        bpy.utils.register_class(panel)
+
+
+    def draw_add_menu(self, context):
+        layout = self.layout
+
+        for cat in node_categories:
+            if cat.poll(context):
+                layout.menu("NODE_MT_category_%s" % cat.identifier)
+
+    add_menu = type("NODE_MT_add", (bpy.types.Menu, NodeCategoryUI), {
+        "bl_space_type" : 'NODE_EDITOR',
+        "bl_label" : "Add",
+        "draw" : draw_add_menu,
+        })
+    bpy.utils.register_class(add_menu)
+
+
+def unregister_node_ui():
+    # unregister existing UI classes
+    for c in NodeCategoryUI.__subclasses__():
+        if hasattr(c, "bl_rna"):
+            bpy.utils.unregister_class(c)
+            del c
+