Merge pull request #3230 from kecnry/fix-lcviz-stretch-hist

postpone updating stretch hist if image_color_value not yet set
spacetelescope · Oct 21, 2024 · f5b3a1d · f5b3a1d
2 parents 1c85b5d + 908c7ee
commit f5b3a1d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/jdaviz/configs/default/plugins/plot_options/plot_options.py b/jdaviz/configs/default/plugins/plot_options/plot_options.py
@@ -1062,6 +1062,10 @@ def _update_stretch_curve(self, msg=None):
             plane = layer_cmap(data)
 
         else:  # Color (Monochromatic)
+            if self.image_color_value is None:
+                # do not crash if image_color_value is not yet assigned,
+                # _update_stretch_curve observes image_color_value so will get called again
+                return False
             # Get color
             color = COLOR_CONVERTER.to_rgba_array(self.image_color_value)[0]
             plane = data[:, np.newaxis] * color