Cancel root-level after callbacks referencing detached widgets

HISTORY.md

@@ -19,6 +19,10 @@
 -->
 
 # Version History
+- 0.2.221 - Inspect registered Tcl commands when cancelling ``after`` callbacks
+           so root-level events without widget paths are removed.
+          - Add regression test ensuring unstored root callbacks referencing
+            detached widgets produce no ``invalid command name`` logs.
 - 0.2.220 - Include script-bearing options when rewriting widget configuration
            references so commands target cloned widgets.
           - Add grouped tests verifying button and menu commands operate on

gui/utils/closable_notebook.py

@@ -45,6 +45,17 @@ def cancel_after_events(widget: tk.Widget, cancelled: set[str] | None = None) ->
     if cancelled is None:
         cancelled = set()
 
+    def _callback_references_widget(func: t.Any) -> bool:
+        if getattr(func, "__self__", None) is widget:
+            return True
+        try:
+            closure = inspect.getclosurevars(func)
+            if widget in closure.nonlocals.values() or widget in closure.globals.values():
+                return True
+        except Exception:
+            pass
+        return False
+
     def _cancel_ident(ident: str) -> None:
         tkapp_local = getattr(widget, "tk", None)
         if tkapp_local is None:
@@ -83,6 +94,16 @@ def _cancel_ident(ident: str) -> None:
                 continue
             if str(widget) in script:
                 _cancel_ident(ident)
+                continue
+            try:
+                root = widget._root()
+            except Exception:
+                root = None
+            if root is not None:
+                tcl_cmds = getattr(root, "_tclCommands", {}) or {}
+                cb = tcl_cmds.get(script)
+                if cb is not None and _callback_references_widget(cb):
+                    _cancel_ident(ident)
 
     try:
         for name in dir(widget):

tests/detachment/after_callbacks/test_cancel_root_level.py

@@ -43,3 +43,13 @@ def test_detach_and_close_no_invalid_command(self, capsys):
         root.update()
         assert "invalid command name" not in capsys.readouterr().err
         root.destroy()
+
+    def test_unstored_command_references_widget(self, capsys):
+        root = tk.Tk(); root.withdraw()
+        btn = tk.Button(root, text="Go")
+        btn.pack()
+        cmd = btn.register(lambda: btn.config(text="Foo"))
+        root.tk.call("after", "1", cmd)
+        cancel_after_events(btn)
+        root.destroy()
+        assert "invalid command name" not in capsys.readouterr().err