fix: Fix selection of custom label colors for napari 0.5.0 (#1138)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Improved handling of colormap properties for ROI and mask
visualization based on different Napari versions.
  
- **Tests**
- Added a new function `get_color_dict` to retrieve color information in
test cases, ensuring compatibility across Napari versions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

package/PartSeg/common_gui/napari_image_view.py

@@ -482,6 +482,9 @@ def get_roi_view_parameters(self, image_info: ImageInfo) -> ColorInfo:
         return res
 
     def set_roi_colormap(self, image_info) -> None:
+        if _napari_ge_5:
+            image_info.roi.colormap = self.get_roi_view_parameters(image_info)
+            return
         if _napari_ge_4_13:
             image_info.roi.color = self.get_roi_view_parameters(image_info)
             return
@@ -583,7 +586,10 @@ def set_mask(self, mask: Optional[np.ndarray] = None, image: Optional[Image] = N
         else:
             image_info.mask.data = mask_marker
         image_info.mask.metadata["valid"] = True
-        image_info.mask.color = self.mask_color()
+        if _napari_ge_5:
+            image_info.mask.colormap = self.mask_color()
+        else:
+            image_info.mask.color = self.mask_color()
         image_info.mask.opacity = self.mask_opacity()
         image_info.mask.visible = self.mask_chk.isChecked()
         self._toggle_mask_chk_visibility()
@@ -602,7 +608,10 @@ def update_mask_parameters(self):
         for image_info in self.image_info.values():
             if image_info.mask is not None:
                 image_info.mask.opacity = opacity
-                image_info.mask.color = colormap
+                if _napari_ge_5:
+                    image_info.mask.colormap = colormap
+                else:
+                    image_info.mask.color = colormap
 
     def set_image(self, image: Optional[Image] = None):
         self.image_info = {}

package/tests/test_PartSeg/test_napari_image_view.py

@@ -32,9 +32,16 @@
 
 if NAPARI_GE_5_0:
     EXPECTED_RANGE = (0, 0, 1)
+
+    def get_color_dict(layer):
+        return layer.colormap.color_dict
+
 else:
     EXPECTED_RANGE = (0, 1, 1)
 
+    def get_color_dict(layer):
+        return layer.color
+
 
 def test_image_info():
     image_info = ImageInfo(Image(np.zeros((10, 10)), image_spacing=(1, 1), axes_order="XY"), [])
@@ -159,9 +166,11 @@ def test_mask_rendering(self, base_settings, image_view, qtbot, tmp_path):
         base_settings.set_in_profile("mask_presentation_opacity", 0.5)
         assert image_view.image_info[str(tmp_path / "test2.tiff")].mask.opacity == 0.5
         base_settings.set_in_profile("mask_presentation_color", (255, 0, 0))
-        assert np.all(image_view.image_info[str(tmp_path / "test2.tiff")].mask.color[1] == (1, 0, 0, 1))
+        assert np.all(get_color_dict(image_view.image_info[str(tmp_path / "test2.tiff")].mask)[1] == (1, 0, 0, 1))
         base_settings.set_in_profile("mask_presentation_color", (128, 0, 0))
-        assert np.allclose(image_view.image_info[str(tmp_path / "test2.tiff")].mask.color[1], (128 / 255, 0, 0, 1))
+        assert np.allclose(
+            get_color_dict(image_view.image_info[str(tmp_path / "test2.tiff")].mask)[1], (128 / 255, 0, 0, 1)
+        )
 
         assert not image_view.image_info[str(tmp_path / "test2.tiff")].mask.visible
         with qtbot.waitSignal(image_view.mask_chk.stateChanged):