Handeling parent parameter

core/node.py

@@ -1,3 +1,7 @@
+
+import bpy
+from mathutils import Color, Vector
+
 from .sockets import Input, Output
 
 
@@ -13,6 +17,8 @@ class Node:
         self.data = {}
         self.parameters = []
 
+        self._parent = None
+
         for prop in self.bl_node.bl_rna.properties:
             if prop.is_readonly:
                 continue
@@ -25,6 +31,57 @@ class Node:
         self.inputs = [Input(ipt, self.tree) for ipt in self.bl_node.inputs]
         self.outputs = [Output(opt, self.tree) for opt in self.bl_node.outputs]
 
+    @property
+    def parent(self):
+        """Get the Node from all the other nodes in the tree checking that the
+        parent of its blender node is the same as the blender node we are comparing.
+
+        Returns:
+            Node: Node parent.
+        """
+
+        if self._parent:
+            return self._parent
+
+        # if blender node doesn't have a parent
+        if not self.bl_node.parent:
+            self._parent = None
+            return self._parent
+
+        for node in self.tree.nodes:
+            if node.bl_node == self.bl_node.parent:
+                self._parent = node
+                return self._parent
+
+    @parent.setter
+    def parent(self, value):
+        """Set the Node parent, using the python object, it's id or the blender node.
+
+        Args:
+            value (Node|str|bpy.types.Node): Node, id or blender node to set as parent.
+        """
+
+        # Node object case
+        if isinstance(value, Node):
+            self._parent = value
+
+        # Node id case
+        elif isinstance(value, str) and value.startswith('0x'):
+            for node in self.tree.nodes:
+                if node.id == value:
+                    self._parent = node
+            else:
+                print('Cannot find parent')
+
+        # blender node case
+        elif isinstance(value, bpy.types.Node):
+            for node in self.tree.nodes:
+                if node.bl_node == value:
+                    self._parent = node
+
+        if self._parent:
+            self.bl_node.parent = self._parent.bl_node
+
     @classmethod
     def from_dict(cls, data, tree):
         """Create all nodes from their dict representation.
@@ -37,12 +94,16 @@ class Node:
             Node: Create abstract node.
         """
 
-        new_bl_node = tree.nodes.new(type=data['bl_idname'])
+        new_bl_node = tree.bl_node_tree.nodes.new(type=data['bl_idname'])
         node = cls(new_bl_node, parent=tree)
 
+        node.id = data['id']
         for p in node.parameters:
             setattr(node, p, data[p])
-            setattr(node.bl_node, p, data[p])
+
+            # set attribute on the blender node only if correct type is retrieve
+            if p not in ('parent',):
+                setattr(node.bl_node, p, getattr(node, p))
 
         node.inputs = [Input.from_dict(ipt_data, node) for ipt_data in data['inputs'].values()]
         node.outputs = [Output.from_dict(opt_data, node) for opt_data in data['outputs'].values()]
@@ -64,7 +125,10 @@ class Node:
             if attr_value is None:
                 attr_value = None
 
-            elif not isinstance(attr_value, (str, int, float, list, tuple)):
+            elif isinstance(attr_value, Node):
+                attr_value = attr_value.id
+
+            elif isinstance(attr_value, (Color, Vector)):
                 attr_value = list(attr_value)
 
             self.data[prop_id] = attr_value

core/node_tree.py

@@ -12,10 +12,11 @@ class NodeTree:
         self.bl_node_tree = bl_node_tree
 
         self.data = {}
-        self.tmp_file = Path('/home/florentin.luce/Bureau/copy_nodes.json')
 
-        self.nodes = [Node(n, parent=self) for n in self.bl_node_tree.nodes]
-        self.links = [Link(l, parent=self) for l in self.bl_node_tree.links]
+        self.links = [Link(lnk, parent=self) for lnk in self.bl_node_tree.links]
+        self.nodes = []
+        for n in self.bl_node_tree.nodes:
+            self.nodes.append(Node(n, parent=self))
 
     def to_dict(self, select_only=False):
         """Convert all blender nodes and links inside the tree into a dictionnary.
@@ -47,7 +48,9 @@ class NodeTree:
 
         for node_id, node_data in self.data['nodes'].items():
 
-            new_node = Node.from_dict(node_data, self.bl_node_tree)
+            new_node = Node.from_dict(node_data, self)
+            self.nodes.append(new_node)
+
             new_node.bl_node.select = True
 
             for ipt in new_node.inputs: