Merge 13e9abc into b7b37de

holoviews/streams.py

@@ -757,10 +757,22 @@ def update(self, **kwargs):
     def contents(self):
         if self._watch_only:
             return {}
-        filtered = {(p.owner, p.name): getattr(p.owner, p.name) for p in self.parameters}
-        return {self._rename.get((o, n), n): v for (o, n), v in filtered.items()
-                if self._rename.get((o, n), True) is not None}
+        contents = {}
+        for p in self.parameters:
+            key = (p.owner, p.name)
+            if key in self._rename and self._rename[key] is None:
+                continue
+            name = self._rename.get(key, p.name)
+            if isinstance(p, param.Action):
+                # Special handling for param.Action, mapping value to True if triggered otherwise False
 
+                value = any(p.owner in (event.obj, event.cls) and
+                            p.name == event.name
+                            for event in self._events)
+            else:
+                value = getattr(p.owner, p.name)
+            contents[name] = value
+        return contents
 
 
 class ParamMethod(Params):

holoviews/tests/teststreams.py

@@ -265,7 +265,7 @@ def subscriber(**kwargs):
 
         stream.add_subscriber(subscriber)
         inner.action(inner)
-        self.assertEqual(values, [{'action': inner.action}])
+        self.assertEqual(values, [{'action': True}])
 
     def test_param_stream_memoization(self):
         inner = self.inner_action()
@@ -282,7 +282,7 @@ def subscriber(**kwargs):
         stream.add_subscriber(subscriber)
         inner.action(inner)
         inner.x = 0
-        self.assertEqual(values, [{'action': inner.action, 'x': 0}])
+        self.assertEqual(values, [{'action': True, 'x': 0}])