forked from bartvdbraak/blender
258 lines
8.6 KiB
Python
258 lines
8.6 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8-80 compliant>
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import bpy
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from bpy.types import Operator, PropertyGroup
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from bpy.props import BoolProperty, CollectionProperty, EnumProperty, StringProperty
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# Base class for node 'Add' operators
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class NodeAddOperator():
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@staticmethod
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def store_mouse_cursor(context, event):
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space = context.space_data
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v2d = context.region.view2d
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tree = space.edit_tree
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# convert mouse position to the View2D for later node placement
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if context.region.type == 'WINDOW':
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space.cursor_location = v2d.region_to_view(event.mouse_region_x,
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event.mouse_region_y)
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else:
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space.cursor_location = tree.view_center
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def create_node(self, context, node_type):
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space = context.space_data
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tree = space.edit_tree
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# select only the new node
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for n in tree.nodes:
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n.select = False
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node = tree.nodes.new(type=node_type)
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if space.use_hidden_preview:
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node.show_preview = False
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node.select = True
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tree.nodes.active = node
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node.location = space.cursor_location
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return node
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@classmethod
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def poll(cls, context):
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space = context.space_data
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# needs active node editor and a tree to add nodes to
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return (space.type == 'NODE_EDITOR' and space.edit_tree)
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# Default invoke stores the mouse position to place the node correctly
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def invoke(self, context, event):
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self.store_mouse_cursor(context, event)
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return self.execute(context)
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class NodeSetting(PropertyGroup):
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value = StringProperty(
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name="Value",
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description="Python expression to be evaluated as the initial node setting",
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default="",
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)
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# Simple basic operator for adding a node
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class NODE_OT_add_node(NodeAddOperator, Operator):
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'''Add a node to the active tree'''
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bl_idname = "node.add_node"
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bl_label = "Add Node"
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type = StringProperty(
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name="Node Type",
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description="Node type",
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)
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use_transform = BoolProperty(
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name="Use Transform",
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description="Start transform operator after inserting the node",
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default=False,
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)
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settings = CollectionProperty(
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name="Settings",
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description="Settings to be applied on the newly created node",
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type=NodeSetting,
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)
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def execute(self, context):
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node = self.create_node(context, self.type)
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for setting in self.settings:
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# XXX catch exceptions here?
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value = eval(setting.value)
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try:
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setattr(node, setting.name, value)
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except AttributeError as e:
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self.report({'ERROR_INVALID_INPUT'}, "Node has no attribute "+setting.name)
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print (str(e))
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# Continue despite invalid attribute
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return {'FINISHED'}
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def invoke(self, context, event):
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self.store_mouse_cursor(context, event)
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result = self.execute(context)
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if self.use_transform and ('FINISHED' in result):
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bpy.ops.transform.translate('INVOKE_DEFAULT')
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return result
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def node_classes_iter(base=bpy.types.Node):
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"""
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Yields all true node classes by checking for the is_registered_node_type classmethod.
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Node types can use specialized subtypes of bpy.types.Node, which are not usable
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nodes themselves (e.g. CompositorNode).
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"""
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if base.is_registered_node_type():
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yield base
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for subclass in base.__subclasses__():
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for node_class in node_classes_iter(subclass):
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yield node_class
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def node_class_items_iter(node_class, context):
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identifier = node_class.bl_rna.identifier
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# XXX Checking for explicit group node types is stupid.
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# This should be replaced by a generic system of generating
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# node items via callback.
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# Group node_tree pointer should also use a poll function to filter the library list,
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# but cannot do that without a node instance here. A node callback could just use the internal poll function.
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if identifier in {'ShaderNodeGroup', 'CompositorNodeGroup', 'TextureNodeGroup'}:
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tree_idname = context.space_data.edit_tree.bl_idname
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for group in bpy.data.node_groups:
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if group.bl_idname == tree_idname:
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# XXX empty string should be replaced by description from tree
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yield (group.name, "", {"node_tree": group})
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else:
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yield (node_class.bl_rna.name, node_class.bl_rna.description, {})
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def node_items_iter(context):
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snode = context.space_data
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if not snode:
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return
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tree = snode.edit_tree
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if not tree:
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return
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for node_class in node_classes_iter():
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if node_class.poll(tree):
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for item in node_class_items_iter(node_class, context):
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yield (node_class,) + item
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# Create an enum list from node class items
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def node_type_items_cb(self, context):
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# XXX Python has to keep a ref to those strings, else they may be freed :(
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NODE_OT_add_search._enum_str_store = [(str(index), item[1], item[2])
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for index, item in enumerate(node_items_iter(context))]
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return NODE_OT_add_search._enum_str_store
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class NODE_OT_add_search(NodeAddOperator, Operator):
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'''Add a node to the active tree'''
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bl_idname = "node.add_search"
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bl_label = "Search and Add Node"
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bl_options = {'REGISTER', 'UNDO'}
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# XXX Python has to keep a ref to the data (strings) generated by enum's callback, else they may be freed :(
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_enum_str_store = []
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# XXX this should be called 'node_type' but the operator search
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# property is hardcoded to 'type' by a hack in bpy_operator_wrap.c ...
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type = EnumProperty(
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name="Node Type",
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description="Node type",
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items=node_type_items_cb,
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)
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def execute(self, context):
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for index, item in enumerate(node_items_iter(context)):
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if str(index) == self.type:
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node = self.create_node(context, item[0].bl_rna.identifier)
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for prop, value in item[3].items():
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setattr(node, prop, value)
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break
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return {'FINISHED'}
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def invoke(self, context, event):
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self.store_mouse_cursor(context, event)
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# Delayed execution in the search popup
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context.window_manager.invoke_search_popup(self)
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return {'CANCELLED'}
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class NODE_OT_collapse_hide_unused_toggle(Operator):
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'''Toggle collapsed nodes and hide unused sockets'''
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bl_idname = "node.collapse_hide_unused_toggle"
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bl_label = "Collapse and Hide Unused Sockets"
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bl_options = {'REGISTER', 'UNDO'}
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@classmethod
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def poll(cls, context):
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space = context.space_data
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# needs active node editor and a tree
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return (space.type == 'NODE_EDITOR' and space.edit_tree)
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def execute(self, context):
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space = context.space_data
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tree = space.edit_tree
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for node in tree.nodes:
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if node.select:
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hide = (not node.hide)
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node.hide = hide
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# Note: connected sockets are ignored internally
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for socket in node.inputs:
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socket.hide = hide
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for socket in node.outputs:
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socket.hide = hide
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return {'FINISHED'}
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class NODE_OT_tree_path_parent(Operator):
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'''Go to parent node tree'''
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bl_idname = "node.tree_path_parent"
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bl_label = "Parent Node Tree"
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bl_options = {'REGISTER', 'UNDO'}
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@classmethod
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def poll(cls, context):
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space = context.space_data
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# needs active node editor and a tree
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return (space.type == 'NODE_EDITOR' and len(space.path) > 1)
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def execute(self, context):
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space = context.space_data
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space.path.pop()
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return {'FINISHED'}
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