Fix sample data loading to be independent of current working directory (

#47)

brainglobe_registration/napari.yaml

@@ -5,10 +5,13 @@ contributions:
     - id: brainglobe-registration.make_registration_widget
       python_name: brainglobe_registration.registration_widget:RegistrationWidget
       title: BrainGlobe Registration
+    - id: brainglobe-registration.load_sample
+      python_name: brainglobe_registration.sample_data:load_sample_data
+      title: Sample Data
   sample_data:
-    - key: example
-      display_name: Sample Brain Slice
-      uri: src/brainglobe_registration/resources/sample_hipp.tif
+    - command: brainglobe-registration.load_sample
+      display_name: Sample Data
+      key: example
   widgets:
     - command: brainglobe-registration.make_registration_widget
       display_name: BrainGlobe Registration

brainglobe_registration/sample_data.py

@@ -0,0 +1,21 @@
+from importlib.resources import files
+from typing import List
+
+from napari.types import LayerData
+from tifffile import imread
+
+
+def load_sample_data() -> List[LayerData]:
+    """
+    Load the sample data.
+
+    Returns
+    -------
+    List[LayerData]
+        The sample data.
+    """
+    path = str(
+        files("brainglobe_registration").joinpath("resources/sample_hipp.tif")
+    )
+
+    return [(imread(path), {"name": "Sample Data"})]