Fix channel str support (#221)

* add channel str and multiscale tests

* fix channel str

* fix channel str for multiscale

* add snapshots for channel str tests

* merged & updated CHANGELOG

* added images from runner

* parametrised test

* added images from runner

* updated failing image from runner

---------

Co-authored-by: Tim Treis <[email protected]>

Author: berombau

.gitignore

@@ -19,6 +19,7 @@ __pycache__/
 /.pytest_cache/
 /.cache/
 /data/
+*failed-diff.png
 
 # docs
 /docs/generated/

CHANGELOG.md

@@ -8,11 +8,19 @@ and this project adheres to [Semantic Versioning][].
 [keep a changelog]: https://keepachangelog.com/en/1.0.0/
 [semantic versioning]: https://semver.org/spec/v2.0.0.html
 
+## [0.2.3] - tbd
+
+### Fixed
+
+-   Fix color assignment for NaN values (#257)
+-   Fix channel str support #221
+
 ## [0.2.2] - 2024-05-02
 
 ### Fixed
 
 -   Fixed `fill_alpha` ignoring `alpha` channel from custom cmap
+-   Fix channel str support (#221)
 
 ## [0.2.1] - 2024-03-26
 

src/spatialdata_plot/pl/render.py

@@ -442,7 +442,7 @@ def _render_images(
 
         # 1) Image has only 1 channel
         if n_channels == 1 and not isinstance(render_params.cmap_params, list):
-            layer = img.sel(c=channels).squeeze()
+            layer = img.sel(c=channels[0]).squeeze()
 
             if render_params.quantiles_for_norm != (None, None):
                 layer = _normalize(

src/spatialdata_plot/pl/utils.py

@@ -1307,7 +1307,7 @@ def _multiscale_to_spatial_image(
     data_var_keys = list(multiscale_image[optimal_scale].data_vars)
     image = multiscale_image[optimal_scale][data_var_keys[0]]
 
-    return Labels2DModel.parse(image) if is_label else Image2DModel.parse(image)
+    return Labels2DModel.parse(image) if is_label else Image2DModel.parse(image, c_coords=image.coords["c"].values)
 
 
 def _get_elements_to_be_rendered(