feature/add-scene-selection-widget

napari_aicsimageio/core.py

@@ -4,9 +4,11 @@
 from functools import partial
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union
 
+import napari
 import xarray as xr
 from aicsimageio import AICSImage, exceptions, types
 from aicsimageio.dimensions import DimensionNames
+from qtpy.QtWidgets import QListWidget
 
 ###############################################################################
 
@@ -41,6 +43,86 @@ def _get_full_image_data(img: AICSImage, in_memory: bool) -> Optional[xr.DataArr
     return None
 
 
+# Function to handle multi-scene files.
+def _get_scenes(img: AICSImage, in_memory: bool) -> None:
+
+    # Create the list widget and populate with the ids & scenes in the file
+    list_widget = QListWidget()
+    for i, scene in enumerate(img.scenes):
+        list_widget.addItem(f"{i} :: {scene}")
+    viewer = napari.current_viewer()
+    viewer.window.add_dock_widget(list_widget, area="right", name="Scene Selector")
+
+    # Function to create image layer from a scene selected in the list widget
+    def open_scene(item) -> None:
+        scene_text = item.text()
+
+        # Use scene indexes to cover for duplicate names
+        scene_index = int(scene_text.split(" :: ")[0])
+        img.set_scene(scene_index)
+        if DimensionNames.MosaicTile in img.reader.dims.order:
+            try:
+                if in_memory:
+                    data = img.reader.mosaic_xarray_data
+                else:
+                    data = img.reader.mosaic_xarray_dask_data
+
+            # Catch reader does not support tile stitching
+            except NotImplementedError:
+                print(
+                    "AICSImageIO: Mosaic tile stitching "
+                    "not yet supported for this file format reader."
+                )
+        else:
+            if in_memory:
+                data = img.reader.xarray_data
+            else:
+                data = img.reader.xarray_dask_data
+        meta = _get_meta(data, img)
+        viewer.add_image(data, name=scene_text, metadata=meta, scale=meta["scale"])
+
+    list_widget.currentItemChanged.connect(open_scene)
+
+
+# Function to get Metadata to provide with data
+def _get_meta(data, img) -> Dict[str, Any]:
+    meta = {}
+    if DimensionNames.Channel in data.dims:
+
+        # Construct basic metadata
+        meta["name"] = data.coords[DimensionNames.Channel].data.tolist()
+        meta["channel_axis"] = data.dims.index(DimensionNames.Channel)
+
+    # Not multi-channel, use current scene as image name
+    else:
+        meta["name"] = img.reader.current_scene
+
+    # Handle samples / RGB
+    if DimensionNames.Samples in img.reader.dims.order:
+        meta["rgb"] = True
+
+    # Handle scales
+    scale: List[float] = []
+    for dim in img.reader.dims.order:
+        if dim in [
+            DimensionNames.SpatialX,
+            DimensionNames.SpatialY,
+            DimensionNames.SpatialZ,
+        ]:
+            scale_val = getattr(img.physical_pixel_sizes, dim)
+            if scale_val is not None:
+                scale.append(scale_val)
+
+    # Apply scales
+    if len(scale) > 0:
+        meta["scale"] = tuple(scale)
+
+    # Apply all other metadata
+    meta["metadata"] = {"ome_types": img.metadata}
+
+    return meta
+
+
 def reader_function(
     path: PathLike, in_memory: bool, scene_name: Optional[str] = None
 ) -> Optional[List[LayerData]]:
@@ -57,53 +139,29 @@ def reader_function(
 
     # Open file and get data
     img = AICSImage(path)
-    print(
-        f"AICSImageIO: Image contains {len(img.scenes)} scenes. "
-        f"napari-aicsimageio currently only supports loading first scene, "
-        f"will load scene: '{img.current_scene}'."
-    )
 
-    data = _get_full_image_data(img, in_memory=in_memory)
+    # Check for multiple scenes
+    if len(img.scenes) > 1:
+        print(
+            f"AICSImageIO: Image contains {len(img.scenes)} scenes. "
+            f"Supporting more than the first scene is experimental. "
+            f"Select a scene from the list widget. There may be dragons!"
+        )
+        # Launch the list widget
+        _get_scenes(img, in_memory=in_memory)
 
-    # Catch None data
-    if data is None:
-        return None
+        # Return an empty LayerData list; ImgLayers will be handled via the widget.
+        # HT Jonas Windhager
+        return [(None,)]
     else:
-        # Metadata to provide with data
-        meta = {}
-        if DimensionNames.Channel in data.dims:
-            # Construct basic metadata
-            meta["name"] = data.coords[DimensionNames.Channel].data.tolist()
-            meta["channel_axis"] = data.dims.index(DimensionNames.Channel)
-
-        # Not multi-channel, use current scene as image name
+        data = _get_full_image_data(img, in_memory=in_memory)
+
+        # Catch None data
+        if data is None:
+            return None
         else:
-            meta["name"] = img.reader.current_scene
-
-        # Handle samples / RGB
-        if DimensionNames.Samples in img.reader.dims.order:
-            meta["rgb"] = True
-
-        # Handle scales
-        scale: List[float] = []
-        for dim in img.reader.dims.order:
-            if dim in [
-                DimensionNames.SpatialX,
-                DimensionNames.SpatialY,
-                DimensionNames.SpatialZ,
-            ]:
-                scale_val = getattr(img.physical_pixel_sizes, dim)
-                if scale_val is not None:
-                    scale.append(scale_val)
-
-        # Apply scales
-        if len(scale) > 0:
-            meta["scale"] = tuple(scale)
-
-        # Apply all other metadata
-        meta["metadata"] = {"ome_types": img.metadata}
-
-        return [(data.data, meta, "image")]
+            meta = _get_meta(data, img)
+            return [(data.data, meta, "image")]
 
 
 def get_reader(path: PathLike, in_memory: bool) -> Optional[ReaderFunction]:

napari_aicsimageio/tests/test_core.py

@@ -57,7 +57,7 @@
             {
                 "name": ["Gray", "Red", "Green", "Cyan"],
                 "channel_axis": 1,
-                "scale": (4.984719055966396, 4.984719055966396),
+                "scale": (0.20061311154598827, 0.20061311154598827),
             },
         ),
     ],
@@ -94,3 +94,60 @@ def test_reader(
         # Check meta
         meta.pop("metadata", None)
         assert meta == expected_meta  # type: ignore
+
+
+SINGLESCENE_FILE = "s_1_t_1_c_1_z_1.czi"
+MULTISCENE_FILE = "s_3_t_1_c_3_z_5.czi"
+
+
+@pytest.mark.parametrize(
+    "in_memory, expected_dtype",
+    [
+        (True, np.ndarray),
+        (False, da.core.Array),
+    ],
+)
+@pytest.mark.parametrize(
+    "filename, nr_widgets, expected_shape",
+    [
+        (SINGLESCENE_FILE, 0, (1, 325, 475)),
+        (MULTISCENE_FILE, 1, (3, 5, 325, 475)),
+    ],
+)
+def test_for_multiscene_widget(
+    make_napari_viewer,
+    resources_dir: Path,
+    filename: str,
+    in_memory: bool,
+    nr_widgets: int,
+    expected_dtype: type,
+    expected_shape: Tuple[int, ...],
+) -> None:
+    # Make a viewer
+    viewer = make_napari_viewer()
+    assert len(viewer.layers) == 0
+    assert len(viewer.window._dock_widgets) == 0
+
+    # Resolve filename to filepath
+    if isinstance(filename, str):
+        path = str(resources_dir / filename)
+
+    # Get reader
+    reader = core.get_reader(path, in_memory)
+
+    # Call reader on path
+    reader(path)
+
+    # Check for list widget
+    assert len(viewer.window._dock_widgets) == nr_widgets
+
+    if len(viewer.window._dock_widgets) != 0:
+        assert list(viewer.window._dock_widgets.keys())[0] == "Scene Selector"
+        viewer.window._dock_widgets["Scene Selector"].widget().setCurrentRow(1)
+        data = viewer.layers[0].data
+        assert isinstance(data.data, expected_dtype)  # type: ignore
+        assert data.shape == expected_shape  # type: ignore
+    else:
+        data, meta, _ = reader(path)[0]
+        assert isinstance(data, expected_dtype)  # type: ignore
+        assert data.shape == expected_shape  # type: ignore

setup.py

@@ -22,6 +22,7 @@
     "mypy>=0.800",
     "psutil>=5.7.0",
     "pytest>=5.4.3",
+    "pytest-qt",
     "pytest-cov>=2.9.0",
     "pytest-raises>=0.11",
     "quilt3~=3.4.0",
@@ -40,9 +41,9 @@
 ]
 
 requirements = [
-    "aicsimageio[all]~=4.0.2",
+    "aicsimageio[all]~=4.1.0",
     "fsspec[http]",  # no version pin, we pull from aicsimageio
-    "napari~=0.4.10",
+    "napari[all]~=0.4.11",
     "napari_plugin_engine~=0.1.4",
 ]