Create basic gallery class that finds Things that want to show data

src/openflexure_microscope_server/things/__init__.py

@@ -15,6 +15,13 @@ class OFMThing(lt.Thing):
 
     _data_dir: Optional[str] = None
 
+    _show_in_gallery: bool = False
+
+    @property
+    def show_in_gallery(self) -> bool:
+        """Whether to show in the Gallery."""
+        return self._show_in_gallery
+
     def __enter__(self) -> Self:
         """Set the data directory when the Thing is entered."""
         # Note that the `application_config` was already validated when the

src/openflexure_microscope_server/things/camera/__init__.py

@@ -25,6 +25,7 @@ from pydantic import BaseModel, Field
 import labthings_fastapi as lt
 from labthings_fastapi.types.numpy import NDArray
 
+from openflexure_microscope_server.things import OFMThing
 from openflexure_microscope_server.things.background_detect import (
     BackgroundDetectAlgorithm,
 )
@@ -164,7 +165,7 @@ class CameraMemoryBuffer:
             del self._storage[key]
 
 
-class BaseCamera(lt.Thing):
+class BaseCamera(OFMThing):
     """The base class for all cameras. All cameras must directly inherit from this class.
 
     The connection to the camera hardware should be added to the ``__enter__`` method not

src/openflexure_microscope_server/things/gallery.py

@@ -0,0 +1,31 @@
+"""Server-side gallery functionality.
+
+The types of data that are captured and how they display in the gallery are defined by
+the Things that capture the Data. This thing just provides a unified way for the gallery
+front end to access the data.
+"""
+
+from typing import Mapping, Optional
+
+import labthings_fastapi as lt
+
+from openflexure_microscope_server.things import OFMThing
+
+
+class GalleryThing(lt.Thing):
+    """A Thing for communicating with the front end gallery."""
+
+    all_ofm_things: Mapping[str, OFMThing] = lt.thing_slot()
+
+    _gallery_providing_things: Optional[Mapping[str, OFMThing]] = None
+
+    @property
+    def gallery_providing_things(self) -> Mapping[str, OFMThing]:
+        """All Things that provide data to the gallery."""
+        if self._gallery_providing_things is None:
+            self._gallery_providing_things = {
+                name: thing
+                for name, thing in self.all_ofm_things.items()
+                if thing.show_in_gallery
+            }
+        return self._gallery_providing_things

src/openflexure_microscope_server/things/smart_scan.py

@@ -176,6 +176,9 @@ class SmartScanThing(OFMThing):
         In this case it doesn't need to do anything.
         """
 
+    # Register with gallery.
+    _show_in_gallery = True
+
     # Note that the default detector name is set at init. This is over written if
     # setting is loaded from disk.
     @lt.setting