Dynamically create context menu sub-folders based on folder structure of nodes.

Nodes/Experimental/blueprint_node.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+from OdenGraphQt import BaseNode
+from Qt import QtCore
+
+class BlueprintNode(BaseNode):
+    """
+    A placeholder node used to preview placement before spawning
+    the real node. It has a distinct color and minimal UI.
+    """
+    __identifier__ = 'bunny-lab.io.blueprint'
+    NODE_NAME = 'Blueprint Node'
+
+    def __init__(self):
+        super(BlueprintNode, self).__init__()
+        # Display a name so the user sees "Click to Place Node"
+        self.set_name("Click to Place Node")
+
+        # Give it a bluish color + white text, for visibility
+        self.set_color(60, 120, 220)  # R, G, B
+        self.view.text_color = (255, 255, 255, 200)
+        self.view.border_color = (255, 255, 255, 180)
+
+        # Make it slightly transparent if desired (alpha=150)
+        self.view._bg_color = (60, 120, 220, 150)
+
+        # Remove any default inputs/outputs (make it minimal)
+        for port in self.input_ports() + self.output_ports():
+            self.model.delete_port(port.name(), port.port_type)
+
+        # Store the "actual node" we want to spawn
+        self.create_property("actual_node_type", "", widget_type=0)
+
+    def process_input(self):
+        """
+        We do nothing here; it is purely a placeholder node.
+        """
+        pass