Initial commit, layout mockup

addons/dockable_container/layout_node.gd

@@ -0,0 +1,29 @@
+@tool
+class_name DockableLayoutNode
+extends Resource
+## Base class for DockableLayout tree nodes
+
+var parent: DockableLayoutSplit:
+	get:
+		return _parent_ref.get_ref()
+	set(value):
+		_parent_ref = weakref(value)
+
+var _parent_ref := WeakRef.new()
+
+
+func emit_tree_changed() -> void:
+	var node := self
+	while node:
+		node.emit_changed()
+		node = node.parent
+
+
+## Returns whether there are any nodes
+func is_empty() -> bool:
+	return true
+
+
+## Returns all tab names in this node
+func get_names() -> PackedStringArray:
+	return PackedStringArray()