fix support for glue 1.19

CHANGES.rst

@@ -72,6 +72,8 @@ Bug Fixes
 
 - Standalone mode: stop jdaviz/voila processes when closing app. [#2791]
 
+- Fixes compatibility with glue >= 1.19. [#2820]
+
 Cubeviz
 ^^^^^^^
 

jdaviz/app.py

@@ -95,13 +95,17 @@ def to_unit(self, data, cid, values, original_units, target_units):
         # gives the units of the values array, which might not be the same
         # as the original native units of the component in the data.
         if cid.label == "flux":
-            spec = data.get_object(cls=Spectrum1D)
-            if len(values) == 2:
-                # Need this for setting the y-limits
-                spec_limits = [spec.spectral_axis[0].value, spec.spectral_axis[-1].value]
-                eqv = u.spectral_density(spec_limits*spec.spectral_axis.unit)
+            try:
+                spec = data.get_object(cls=Spectrum1D)
+            except RuntimeError:
+                eqv = []
             else:
-                eqv = u.spectral_density(spec.spectral_axis)
+                if len(values) == 2:
+                    # Need this for setting the y-limits
+                    spec_limits = [spec.spectral_axis[0].value, spec.spectral_axis[-1].value]
+                    eqv = u.spectral_density(spec_limits * spec.spectral_axis.unit)
+                else:
+                    eqv = u.spectral_density(spec.spectral_axis)
         else:  # spectral axis
             eqv = u.spectral()
 

pyproject.toml

@@ -12,7 +12,7 @@ dependencies = [
     "traitlets>=5.0.5",
     "bqplot>=0.12.37",
     "bqplot-image-gl>=1.4.11",
-    "glue-core>=1.18.0,!=1.19.0",
+    "glue-core>=1.18.0",
     "glue-jupyter>=0.20",
     "echo>=0.5.0",
     "ipykernel>=6.19.4",