Move get_valid_axis_keys

src/napari_matplotlib/features.py

@@ -1,3 +1,5 @@
+from typing import List
+
 import napari.layers
 
 from napari_matplotlib.base import NapariMPLWidget
@@ -19,3 +21,18 @@ class FeaturesMixin(NapariMPLWidget):
         napari.layers.Tracks,
         napari.layers.Vectors,
     )
+
+    def _get_valid_axis_keys(self) -> List[str]:
+        """
+        Get the valid axis keys from the layer FeatureTable.
+
+        Returns
+        -------
+        axis_keys : List[str]
+            The valid axis keys in the FeatureTable. If the table is empty
+            or there isn't a table, returns an empty list.
+        """
+        if len(self.layers) == 0 or not (hasattr(self.layers[0], "features")):
+            return []
+        else:
+            return self.layers[0].features.keys()

src/napari_matplotlib/scatter.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List, Optional, Tuple, Union
+from typing import Any, Dict, Optional, Tuple, Union
 
 import napari
 import numpy.typing as npt
@@ -141,21 +141,6 @@ def y_axis_key(self, key: str) -> None:
         self._selectors["y"].setCurrentText(key)
         self._draw()
 
-    def _get_valid_axis_keys(self) -> List[str]:
-        """
-        Get the valid axis keys from the layer FeatureTable.
-
-        Returns
-        -------
-        axis_keys : List[str]
-            The valid axis keys in the FeatureTable. If the table is empty
-            or there isn't a table, returns an empty list.
-        """
-        if len(self.layers) == 0 or not (hasattr(self.layers[0], "features")):
-            return []
-        else:
-            return self.layers[0].features.keys()
-
     def _ready_to_scatter(self) -> bool:
         """
         Return True if selected layer has a feature table we can scatter with,