remove temp_grab_current (private api)

src/kivy_garden/draggable/_impl.py

@@ -19,7 +19,7 @@
 import asynckivy as ak
 
 from ._utils import (
-    temp_transform, temp_grab_current, _create_spacer,
+    temp_transform, _create_spacer,
     save_widget_state, restore_widget_state,
 )
 
@@ -228,10 +228,13 @@ async def _treat_a_touch_as_a_drag(self, touch, *, do_transform=False, touch_rec
 
     async def _simulate_a_normal_touch(self, touch, *, do_transform=False, do_touch_up=False):
         # simulate 'on_touch_down'
-        with temp_grab_current(touch):
+        original = touch.grab_current
+        try:
             touch.grab_current = None
             with temp_transform(touch, self.parent.to_widget) if do_transform else nullcontext():
                 super().on_touch_down(touch)
+        finally:
+            touch.grab_current = original
 
         if not do_touch_up:
             return

src/kivy_garden/draggable/_utils.py

@@ -1,5 +1,5 @@
 __all__ = (
-    'temp_transform', 'temp_grab_current',
+    'temp_transform',
     'save_widget_state', 'restore_widget_state',
     'save_widget_location', 'restore_widget_location',
 )
@@ -24,20 +24,6 @@ def __exit__(self, *args):
         self._touch.pop()
 
 
-class temp_grab_current:
-    __slots__ = ('_touch', '_original', )
-
-    def __init__(self, touch):
-        self._touch = touch
-        self._original = touch.grab_current
-
-    def __enter__(self):
-        pass
-
-    def __exit__(self, *args):
-        self._touch.grab_current = self._original
-
-
 _shallow_copyable_property_names = (
     'x', 'y', 'width', 'height',
     'size_hint_x', 'size_hint_y',