DatagridsManager : I can see the opened folders in the Treeview

src/myfasthtml/controls/TreeView.py

@@ -173,7 +173,7 @@ class TreeView(MultipleInstance):
                Format: {type: "provider.icon_name"}
     """
     self._state.icon_config = config
-   
+  
   def add_node(self, node: TreeNode, parent_id: Optional[str] = None, insert_index: Optional[int] = None):
     """
     Add a node to the tree.
@@ -185,6 +185,9 @@ class TreeView(MultipleInstance):
                      If None, appends to end. If provided, inserts at that position.
     """
     self._state.items[node.id] = node
+    if parent_id is None and node.parent is not None:
+      parent_id = node.parent
+      
     node.parent = parent_id
     
     if parent_id and parent_id in self._state.items:
@@ -195,12 +198,66 @@ class TreeView(MultipleInstance):
         else:
           parent.children.append(node.id)
   
+  def ensure_path(self, path: str):
+    """Add a node to the tree based on a path string.
+
+    Args:
+        path: Dot-separated path string (e.g., "folder1.folder2.file")
+
+    Raises:
+        ValueError: If path contains empty parts after stripping
+    """
+    if path is None:
+      raise ValueError(f"Invalid path: path is None")
+    
+    path = path.strip().strip(".")
+    if path == "":
+      raise ValueError(f"Invalid path: path is empty")
+    
+    parent_id = None
+    current_nodes = [node for node in self._state.items.values() if node.parent is None]
+    
+    path_parts = path.split(".")
+    for part in path_parts:
+      part = part.strip()
+      
+      # Validate that part is not empty after stripping
+      if part == "":
+        raise ValueError(f"Invalid path: path contains empty parts")
+      
+      node = [node for node in current_nodes if node.label == part]
+      if len(node) == 0:
+        # create the node
+        node = TreeNode(label=part, type="folder")
+        self.add_node(node, parent_id=parent_id)
+      else:
+        node = node[0]
+      
+      current_nodes = [self._state.items[node_id] for node_id in node.children]
+      parent_id = node.id
+    
+    return parent_id
+  
+  def get_selected_id(self):
+    if self._state.selected is None:
+      return None
+    return self._state.items[self._state.selected].id
+  
   def expand_all(self):
     """Expand all nodes that have children."""
     for node_id, node in self._state.items.items():
       if node.children and node_id not in self._state.opened:
         self._state.opened.append(node_id)
   
+  def clear(self):
+    state = self._state.copy()
+    state.items = {}
+    state.opened = []
+    state.selected = None
+    state.editing = None
+    self._state.update(state)
+    return self
+  
   def _toggle_node(self, node_id: str):
     """Toggle expand/collapse state of a node."""
     if node_id in self._state.opened: