fix: fix blocker (#302)

* fix: fix blocker

* fix test

Author: tlambert03

pyproject.toml

@@ -48,7 +48,7 @@ classifiers = [
 dynamic = ["version"]
 dependencies = [
     'fonticon-materialdesignicons6',
-    'pymmcore-plus[cli] >=0.9.0',
+    'pymmcore-plus[cli] >=0.10.2',
     'qtpy >=2.0',
     'superqt[quantity] >=0.5.3',
     'useq-schema >=0.4.7',

src/pymmcore_widgets/_util.py

@@ -2,11 +2,12 @@
 
 import re
 from pathlib import Path
-from typing import ContextManager, Sequence
+from typing import Any, ContextManager, Sequence
 
 import useq
+from psygnal import SignalInstance
 from pymmcore_plus import CMMCorePlus
-from pymmcore_plus.core.events import CMMCoreSignaler, PCoreSignaler
+from qtpy.QtCore import QObject
 from qtpy.QtWidgets import (
     QComboBox,
     QDialog,
@@ -87,12 +88,13 @@ def guess_objective_or_prompt(
     return None
 
 
-def block_core(mmcore_events: CMMCoreSignaler | PCoreSignaler) -> ContextManager:
+def block_core(obj: Any) -> ContextManager:
     """Block core signals."""
-    if isinstance(mmcore_events, CMMCoreSignaler):
-        return mmcore_events.blocked()  # type: ignore
-    elif isinstance(mmcore_events, PCoreSignaler):
-        return signals_blocked(mmcore_events)  # type: ignore
+    if isinstance(obj, QObject):
+        return signals_blocked(obj)  # type: ignore [no-any-return]
+    if isinstance(obj, SignalInstance):
+        return obj.blocked()
+    raise TypeError(f"Cannot block signals for {obj}")
 
 
 def cast_grid_plan(