Add config fields for Trigger mode for GenTL

dlclivegui/cameras/base.py

@@ -70,6 +70,7 @@ class SupportLevel(str, Enum):
     "set_gain": SupportLevel.UNSUPPORTED,
     "device_discovery": SupportLevel.UNSUPPORTED,
     "stable_identity": SupportLevel.UNSUPPORTED,
+    "hardware_trigger": SupportLevel.UNSUPPORTED,
 }
 
 

dlclivegui/config.py

@@ -12,6 +12,8 @@
 TileLayout = Literal["auto", "2x2", "1x4", "4x1"]
 Precision = Literal["FP32", "FP16"]
 ModelType = Literal["pytorch", "tensorflow"]
+TriggerRole = Literal["off", "external", "master", "follower"]
+TriggerActivation = Literal["RisingEdge", "FallingEdge", "AnyEdge", "LevelHigh", "LevelLow"]
 
 
 class CameraSettings(BaseModel):
@@ -168,6 +170,137 @@ def check_diff(old: CameraSettings, new: CameraSettings) -> dict:
                 pass
         return out
 
+    def backend_options(self, backend: str | None = None) -> dict[str, Any]:
+        key = backend or self.backend
+        props = self.properties if isinstance(self.properties, dict) else {}
+        ns = props.get(str(key).lower(), {})
+        return ns if isinstance(ns, dict) else {}
+
+    def get_trigger_settings(self, backend: str | None = None) -> CameraTriggerSettings:
+        ns = self.backend_options(backend)
+        return CameraTriggerSettings.from_any(ns.get("trigger"))
+
+    def set_trigger_settings(self, trigger: CameraTriggerSettings, backend: str | None = None) -> None:
+        key = backend or self.backend
+        if not isinstance(self.properties, dict):
+            self.properties = {}
+        ns = self.properties.setdefault(str(key).lower(), {})
+        if not isinstance(ns, dict):
+            ns = {}
+            self.properties[str(key).lower()] = ns
+        ns["trigger"] = trigger.to_properties()
+
+    def with_save_defaults(self) -> CameraSettings:
+        out = self.model_copy(deep=True)
+
+        backend = (out.backend or "").lower()
+        if backend != "gentl":
+            return out
+
+        if not isinstance(out.properties, dict):
+            out.properties = {}
+
+        ns = out.properties.setdefault("gentl", {})
+        if not isinstance(ns, dict):
+            ns = {}
+            out.properties["gentl"] = ns
+
+        ns.setdefault("trigger", CameraTriggerSettings().to_properties())
+
+        return out
+
+
+class CameraTriggerSettings(BaseModel):
+    """
+    Generic hardware-trigger settings.
+
+    Backend-specific code may ignore fields that are unsupported by a given
+    camera/SDK. For GenTL, these map to common GenICam nodes such as:
+    TriggerMode, TriggerSelector, TriggerSource, TriggerActivation,
+    LineSelector, LineMode, and LineSource.
+    """
+
+    role: TriggerRole = "off"
+
+    # Input trigger config: external/follower
+    selector: str = "FrameStart"
+    source: str = "auto"
+    activation: TriggerActivation | str = "RisingEdge"
+
+    # Output config: master
+    output_line: str = "Line2"
+    output_source: str = "ExposureActive"
+
+    # Runtime behavior
+    timeout: float | None = None
+    strict: bool = False
+
+    @field_validator("role", mode="before")
+    @classmethod
+    def _coerce_role(cls, v):
+        if v is None:
+            return "off"
+
+        s = str(v).strip().lower()
+        aliases = {
+            "": "off",
+            "none": "off",
+            "false": "off",
+            "disabled": "off",
+            "disable": "off",
+            "off": "off",
+            "true": "external",
+            "on": "external",
+            "trigger": "external",
+            "triggered": "external",
+            "external": "external",
+            "follower": "follower",
+            "slave": "follower",
+            "master": "master",
+            "main": "master",
+        }
+        return aliases.get(s, s)
+
+    @field_validator("timeout", mode="before")
+    @classmethod
+    def _coerce_timeout(cls, v):
+        if v in (None, ""):
+            return None
+        try:
+            fv = float(v)
+        except Exception:
+            return None
+        return fv if fv > 0 else None
+
+    @field_validator("source", mode="before")
+    @classmethod
+    def _coerce_source(cls, v):
+        if v is None:
+            return "auto"
+
+        s = str(v).strip()
+        if not s:
+            return "auto"
+
+        aliases = {
+            "default": "auto",
+            "automatic": "auto",
+            "device": "auto",
+            "camera": "auto",
+        }
+        return aliases.get(s.lower(), s)
+
+    @classmethod
+    def from_any(cls, value) -> CameraTriggerSettings:
+        if isinstance(value, cls):
+            return value
+        if isinstance(value, dict):
+            return cls(**value)
+        return cls()
+
+    def to_properties(self) -> dict[str, Any]:
+        return self.model_dump(exclude_none=True)
+
 
 class MultiCameraSettings(BaseModel):
     cameras: list[CameraSettings] = Field(default_factory=list)
@@ -206,12 +339,19 @@ def from_dict(cls, data: dict[str, Any]) -> MultiCameraSettings:
         return cls(cameras=cameras, max_cameras=max_cameras, tile_layout=tile_layout)
 
     def to_dict(self) -> dict[str, Any]:
+        out = self.with_save_defaults()
         return {
-            "cameras": [cam.model_dump() for cam in self.cameras],
-            "max_cameras": self.max_cameras,
-            "tile_layout": self.tile_layout,
+            "cameras": [cam.model_dump() for cam in out.cameras],
+            "max_cameras": out.max_cameras,
+            "tile_layout": out.tile_layout,
         }
 
+    def with_save_defaults(self) -> MultiCameraSettings:
+        """Return a copy with save defaults applied to all cameras."""
+        out = self.model_copy(deep=True)
+        out.cameras = [cam.with_save_defaults() for cam in out.cameras]
+        return out
+
 
 class DynamicCropModel(BaseModel):
     enabled: bool = False
@@ -377,10 +517,13 @@ def from_dict(cls, data: dict[str, Any]) -> ApplicationSettings:
         )
 
     def to_dict(self) -> dict[str, Any]:
+        camera = self.camera.with_save_defaults()
+        multi_camera = self.multi_camera.with_save_defaults()
+
         return {
             "version": self.version,
-            "camera": self.camera.model_dump(),
-            "multi_camera": self.multi_camera.to_dict(),
+            "camera": camera.model_dump(),
+            "multi_camera": multi_camera.to_dict(),
             "dlc": self.dlc.model_dump(),
             "recording": self.recording.model_dump(),
             "bbox": self.bbox.model_dump(),

dlclivegui/gui/main_window.py

@@ -854,15 +854,23 @@ def _apply_config(self, config: ApplicationSettings) -> None:
         # Update recording path preview
         self._update_recording_path_preview()
 
-    def _current_config(self) -> ApplicationSettings:
-        # Get the first camera from multi-camera config for backward compatibility
-        active_cameras = self._config.multi_camera.get_active_cameras()
-        camera = active_cameras[0] if active_cameras else CameraSettings()
+    def _current_config(self, *, allow_empty_model_path=False) -> ApplicationSettings:
+        multi_camera = self._config.multi_camera
+        active_cameras = multi_camera.get_active_cameras()
+        camera = (
+            active_cameras[0].model_copy(deep=True)
+            if active_cameras
+            else (
+                multi_camera.cameras[0].model_copy(deep=True)
+                if multi_camera.cameras
+                else self._config.camera.model_copy(deep=True)
+            )
+        )
 
         return ApplicationSettings(
             camera=camera,
-            multi_camera=self._config.multi_camera,
-            dlc=self._dlc_settings_from_ui(),
+            multi_camera=multi_camera,
+            dlc=self._dlc_settings_from_ui(allow_empty_model_path=allow_empty_model_path),
             recording=self._recording_settings_from_ui(),
             bbox=self._bbox_settings_from_ui(),
             visualization=self._visualization_settings_from_ui(),
@@ -874,14 +882,29 @@ def _parse_json(self, value: str) -> dict:
             return {}
         return json.loads(text)
 
-    def _dlc_settings_from_ui(self) -> DLCProcessorSettings:
+    def _dlc_settings_from_ui(self, *, allow_empty_model_path=False) -> DLCProcessorSettings:
         model_path = self.model_path_edit.text().strip()
         if Path(model_path).exists() and Path(model_path).suffix == ".pb":
             # IMPORTANT NOTE: DLClive expects a directory for TensorFlow models,
             # so if user selects a .pb file, we should pass the parent directory to DLCLive
             model_path = str(Path(model_path).parent)
-        if model_path == "":
+
+        existing_dlc = (  # explicitly init from default if unset
+            self._config.dlc.model_copy(deep=True)
+            if getattr(self._config, "dlc", None) is not None
+            else DEFAULT_CONFIG.dlc.model_copy(deep=True)
+        )
+        if not model_path:
+            if allow_empty_model_path:
+                # Preserve all existing DLC settings and only clear the model path.
+                return existing_dlc.model_copy(
+                    update={
+                        "model_path": "",
+                    }
+                )
+
             raise ValueError("Model path cannot be empty. Please enter a valid path to a DLCLive model file.")
+
         try:
             model_bknd = DLCLiveProcessor.get_model_backend(model_path)
         except Exception as e:
@@ -890,15 +913,13 @@ def _dlc_settings_from_ui(self) -> DLCProcessorSettings:
                 "Please ensure the model file is valid and has an appropriate extension "
                 "(.pt, .pth for PyTorch or model directory for TensorFlow)."
             ) from e
-        return DLCProcessorSettings(
-            model_path=model_path,
-            model_directory=self._config.dlc.model_directory,  # Preserve from config
-            device=self._config.dlc.device,  # Preserve from config
-            dynamic=self._config.dlc.dynamic,  # Preserve from config
-            resize=self._config.dlc.resize,  # Preserve from config
-            precision=self._config.dlc.precision,  # Preserve from config
-            model_type=model_bknd,
-            # additional_options=self._parse_json(self.additional_options_edit.toPlainText()),
+
+        # Preserve all unchanged DLC settings and only update values derived from the UI.
+        return existing_dlc.model_copy(
+            update={
+                "model_path": model_path,
+                "model_type": model_bknd,
+            }
         )
 
     def _recording_settings_from_ui(self) -> RecordingSettings:
@@ -965,7 +986,7 @@ def _action_save_config_as(self) -> None:
 
     def _save_config_to_path(self, path: Path) -> None:
         try:
-            config = self._current_config()
+            config = self._current_config(allow_empty_model_path=True)
             config.save(path)
             self._settings_store.set_last_config_path(str(path))
             self._settings_store.save_full_config_snapshot(config)
@@ -1265,8 +1286,10 @@ def _refresh_dlc_camera_list_running(self) -> None:
         """Populate the inference camera dropdown from currently running cameras."""
         self.dlc_camera_combo.blockSignals(True)
         self.dlc_camera_combo.clear()
-        for cam_id in sorted(self._running_cams_ids):
-            self.dlc_camera_combo.addItem(self._label_for_cam_id(cam_id), cam_id)
+        for cam in self._config.multi_camera.get_active_cameras():
+            cam_id = get_camera_id(cam)
+            if cam_id in self._running_cams_ids:
+                self.dlc_camera_combo.addItem(self._label_for_cam_id(cam_id), cam_id)
 
         # Keep current selection if still present, else select first running
         if self._inference_camera_id in self._running_cams_ids:
@@ -1368,7 +1391,7 @@ def _on_multi_frame_ready(self, frame_data: MultiFrameData) -> None:
 
         # Determine DLC camera (first active camera)
         selected_id = self._inference_camera_id
-        available_ids = sorted(frame_data.frames.keys())
+        available_ids = list(frame_data.frames.keys())
         if selected_id in frame_data.frames:
             dlc_cam_id = selected_id
         else:
@@ -1611,7 +1634,7 @@ def _stop_preview(self) -> None:
     def _configure_dlc(self) -> bool:
         try:
             settings = self._dlc_settings_from_ui()
-        except (ValueError, json.JSONDecodeError) as exc:
+        except (ValueError, RuntimeError, json.JSONDecodeError) as exc:
             self._show_error(f"Invalid DLCLive settings: {exc}")
             return False
         if not settings.model_path: