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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
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
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