ensure thickness is only added if needeed

pyproject.toml

@@ -37,6 +37,7 @@ dependencies = [
     "einops",
     "morphosamplers>=0.0.10",
     "pydantic<2",  # migration will take a while for napari
+    "packaging",
 ]
 
 # extras

src/blik/reader.py

@@ -1,4 +1,5 @@
 import warnings
+from importlib.metadata import version
 from pathlib import Path
 from uuid import uuid1
 
@@ -7,10 +8,13 @@
 import pandas as pd
 from cryotypes.image import ImageProtocol
 from cryotypes.poseset import PoseSetProtocol
+from packaging.version import parse as parse_version
 from scipy.spatial.transform import Rotation
 
 from .utils import generate_vectors, invert_xyz
 
+NAPARI_050 = parse_version(version("napari")) >= parse_version("0.5.0a")
+
 
 def get_reader(path):
     return read_layers
@@ -38,9 +42,9 @@ def _construct_positions_layer(
             "shading": "spherical",
             "antialiasing": 0,
             "metadata": {"experiment_id": exp_id, "p_id": p_id, "source": source},
-            "projection_mode": "all",
             "out_of_slice_display": True,
             **pt_kwargs,
+            **({"projection_mode": "all"} if NAPARI_050 else {}),
         },
         "points",
     )
@@ -65,8 +69,8 @@ def _construct_orientations_layer(coords, features, scale, exp_id, p_id, source)
             "scale": [scale] * 3,
             "metadata": {"experiment_id": exp_id, "p_id": p_id, "source": source},
             "vector_style": "arrow",
-            "projection_mode": "all",
             "out_of_slice_display": True,
+            **({"projection_mode": "all"} if NAPARI_050 else {}),
         },
         "vectors",
     )
@@ -154,7 +158,7 @@ def read_image(image):
             "depiction": "plane",
             "blending": "translucent",
             "plane": {"thickness": 5},
-            "projection_mode": "mean",
+            **({"projection_mode": "mean"} if NAPARI_050 else {}),
         },
         "image",
     )

src/blik/widgets/main_widget.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from importlib.metadata import version
 from typing import List
 
 import napari
@@ -10,6 +11,7 @@
 from napari.layers import Image, Labels, Points, Shapes, Vectors
 from napari.utils._magicgui import find_viewer_ancestor
 from napari.utils.notifications import show_info
+from packaging.version import parse as parse_version
 from scipy.spatial.transform import Rotation
 
 from ..reader import construct_particle_layer_tuples
@@ -242,7 +244,8 @@ def __init__(self, *args, **kwargs):
         self.append(exp)
         self.append(new)
         self.append(add_to_exp)
-        self.append(slice_thickness_A)
+        if parse_version(version("napari")) >= parse_version("0.5.0a"):
+            self.append(slice_thickness_A)
 
     def append(self, item):
         super().append(item)