Processor-related fixes

dlclivegui/gui/main_window.py

@@ -784,6 +784,8 @@ def _connect_signals(self) -> None:
         self._dlc.initialized.connect(self._on_dlc_initialised)
         self.dlc_camera_combo.currentIndexChanged.connect(self._on_dlc_camera_changed)
         self.dlc_camera_combo.currentTextChanged.connect(self.dlc_camera_combo.update_shrink_width)
+        self.allow_processor_ctrl_checkbox.stateChanged.connect(lambda _s: self._update_dlc_controls_enabled())
+        self.allow_processor_ctrl_checkbox.stateChanged.connect(lambda _s: self._update_processor_status())
 
         # Recording settings
         ## Session name persistence + preview updates
@@ -1425,6 +1427,7 @@ def _on_multi_camera_started(self) -> None:
         self.statusBar().showMessage(f"Multi-camera preview started: {active_count} camera(s)", 5000)
         self._update_inference_buttons()
         self._update_camera_controls_enabled()
+        self._update_dlc_controls_enabled()
 
     def _on_multi_camera_stopped(self) -> None:
         """Handle all cameras stopped event."""
@@ -1440,6 +1443,7 @@ def _on_multi_camera_stopped(self) -> None:
         self.statusBar().showMessage("Multi-camera preview stopped", 3000)
         self._update_inference_buttons()
         self._update_camera_controls_enabled()
+        self._update_dlc_controls_enabled()
 
     def _on_multi_camera_error(self, camera_id: str, message: str) -> None:
         """Handle error from a camera in multi-camera mode."""
@@ -1653,24 +1657,28 @@ def _update_inference_buttons(self) -> None:
     def _update_dlc_controls_enabled(self) -> None:
         """Enable/disable DLC settings based on inference state."""
         allow_changes = not self._dlc_active
-        processor_controls = allow_changes and self._processor_control_enabled()
 
         widgets = [
             self.model_path_edit,
             self.browse_model_button,
             self.dlc_camera_combo,
-            # self.additional_options_edit,
         ]
+
         processor_widgets = [
             self.processor_folder_edit,
             self.browse_processor_folder_button,
             self.refresh_processors_button,
             self.processor_combo,
         ]
+
         for widget in widgets:
             widget.setEnabled(allow_changes)
+
         for widget in processor_widgets:
-            widget.setEnabled(processor_controls)
+            widget.setEnabled(allow_changes)
+
+        if hasattr(self, "allow_processor_ctrl_checkbox"):
+            self.allow_processor_ctrl_checkbox.setEnabled(allow_changes)
 
     def _update_camera_controls_enabled(self) -> None:
         multi_cam_recording = self._rec_manager.is_active

dlclivegui/processors/PLUGIN_SYSTEM.md

@@ -16,7 +16,8 @@ Processors are Python classes (typically subclasses of `dlclive.Processor`) that
 
 ### Useful files
 
-- `dlclivegui/processors/dlc_processor_socket.py` — Example socket-based processor base class + examples
+- `dlclivegui/processors/dlc_processor_socket.py` — Example socket-based processor base class
+- `dlclivegui/processors/examples.py` — Example processor implementations (e.g., One-Euro filter)
 - `dlclivegui/processors/processor_utils.py` — Scanning + instantiation helpers used by the GUI
 
 ---
@@ -204,12 +205,7 @@ The built-in `BaseProcessorSocket` (in `dlc_processor_socket.py`) demonstrates a
 
 ```python
 from dlclive import Processor
-
-PROCESSOR_REGISTRY = {}
-
-def register_processor(cls):
-    PROCESSOR_REGISTRY[getattr(cls, "PROCESSOR_ID", cls.__name__)] = cls
-    return cls
+from dlclivegui.processors import register_processor, PROCESSOR_REGISTRY
 
 @register_processor
 class MyNewProcessor(Processor):

dlclivegui/processors/__init__.py

@@ -0,0 +1,3 @@
+from .registry import PROCESSOR_REGISTRY, register_processor
+
+__all__ = ["register_processor", "PROCESSOR_REGISTRY"]