Add to release notes

fourpoints · fourpoints · commit c09ac0391c73 · 2021-07-23T12:56:47.000+02:00
diff --git a/doc/users/next_whats_new/collection_offsets.rst b/doc/users/next_whats_new/collection_offsets.rst
@@ -0,0 +1,5 @@
+Setting collection offset transform after initialization
+--------------------------------------------------------
+`~matplotlib.collections.Collection.set_offset_transform` was added.
+
+Previously the offset transform could not be set after initialization.
diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -229,6 +229,8 @@ def get_offset_transform(self):
 
     def set_offset_transform(self, transOffset):
         self._transOffset = transOffset
+        self.pchanged()
+        self.stale = True
 
     def get_datalim(self, transData):
         # Calculate the data limits and return them as a `.Bbox`.
