f

bec_widgets/widgets/control/scan_control/scan_control.py

@@ -25,6 +25,7 @@ from bec_widgets.utils.colors import apply_theme, get_accent_colors
 from bec_widgets.utils.error_popups import SafeProperty, SafeSlot
 from bec_widgets.widgets.control.buttons.stop_button.stop_button import StopButton
 from bec_widgets.widgets.control.scan_control.scan_group_box import ScanGroupBox
+from bec_widgets.widgets.control.scan_control.scan_info_adapter import ScanInfoAdapter
 from bec_widgets.widgets.editors.scan_metadata.scan_metadata import ScanMetadata
 from bec_widgets.widgets.utility.toggle.toggle import ToggleSwitch
 
@@ -97,6 +98,7 @@ class ScanControl(BECWidget, QWidget):
         self._hide_scan_control_buttons = False
         self._hide_metadata = False
         self._hide_scan_selection_combobox = False
+        self._scan_info_adapter = ScanInfoAdapter()
 
         # Create and set main layout
         self._init_UI()
@@ -195,7 +197,8 @@ class ScanControl(BECWidget, QWidget):
             allowed_scans = [
                 scan_name
                 for scan_name, scan_info in self.available_scans.items()
-                if scan_info["base_class"] in supported_scans and len(scan_info["gui_config"]) > 0
+                if scan_info["base_class"] in supported_scans
+                and self._scan_info_adapter.has_scan_ui_config(scan_info)
             ]
 
         else:
@@ -390,14 +393,14 @@ class ScanControl(BECWidget, QWidget):
         self.reset_layout()
         selected_scan_info = self.available_scans.get(scan_name, {})
 
-        gui_config = selected_scan_info.get("gui_config", {})
-        self.arg_group = gui_config.get("arg_group", None)
-        self.kwarg_groups = gui_config.get("kwarg_groups", None)
+        gui_config = self._scan_info_adapter.build_scan_ui_config(selected_scan_info)
+        arg_group = gui_config.get("arg_group", None)
+        kwarg_groups = gui_config.get("kwarg_groups", [])
 
-        if bool(self.arg_group["arg_inputs"]):
-            self.add_arg_group(self.arg_group)
-        if len(self.kwarg_groups) > 0:
-            self.add_kwargs_boxes(self.kwarg_groups)
+        if arg_group and bool(arg_group.get("arg_inputs")):
+            self.add_arg_group(arg_group)
+        if kwarg_groups:
+            self.add_kwargs_boxes(kwarg_groups)
 
         self.update()
         self.adjustSize()

bec_widgets/widgets/control/scan_control/scan_group_box.py

@@ -209,6 +209,8 @@ class ScanGroupBox(QGroupBox):
 
         self.labels = []
         self.widgets = []
+        self._widget_configs = {}
+        self._column_labels = {}
         self.selected_devices = {}
 
         self.init_box(self.config)
@@ -247,6 +249,7 @@ class ScanGroupBox(QGroupBox):
             label = QLabel(text=display_name)
             self.layout.addWidget(label, row, column_index)
             self.labels.append(label)
+            self._column_labels[column_index] = label
 
     def add_input_widgets(self, group_inputs: dict, row) -> None:
         """
@@ -272,21 +275,30 @@ class ScanGroupBox(QGroupBox):
             if default == "_empty":
                 default = None
             widget = widget_class(parent=self.parent(), arg_name=arg_name, default=default)
+            self._apply_numeric_precision(widget, item)
+            self._apply_numeric_limits(widget, item)
             if isinstance(widget, DeviceLineEdit):
                 widget.set_device_filter(BECDeviceFilter.DEVICE)
                 self.selected_devices[widget] = ""
                 widget.device_selected.connect(self.emit_device_selected)
+                widget.textChanged.connect(
+                    lambda text, device_widget=widget: self._handle_device_text_changed(
+                        device_widget, text
+                    )
+                )
             if isinstance(widget, ScanLiteralsComboBox):
                 widget.set_literals(item["type"].get("Literal", []))
-            tooltip = item.get("tooltip", None)
-            if tooltip is not None:
-                widget.setToolTip(item["tooltip"])
+            self._widget_configs[widget] = item
+            self._apply_unit_metadata(widget, item)
             self.layout.addWidget(widget, row, column_index)
             self.widgets.append(widget)
 
     @Slot(str)
     def emit_device_selected(self, device_name):
-        self.selected_devices[self.sender()] = device_name.strip()
+        sender = self.sender()
+        self.selected_devices[sender] = device_name.strip()
+        if isinstance(sender, DeviceLineEdit):
+            self._update_reference_units(sender, self._device_units(sender.get_current_device()))
         selected_devices_str = " ".join(self.selected_devices.values())
         self.device_selected.emit(selected_devices_str)
 
@@ -313,6 +325,7 @@ class ScanGroupBox(QGroupBox):
         for widget in self.widgets[-len(self.inputs) :]:
             if isinstance(widget, DeviceLineEdit):
                 self.selected_devices[widget] = ""
+            self._widget_configs.pop(widget, None)
             widget.close()
             widget.deleteLater()
         self.widgets = self.widgets[: -len(self.inputs)]
@@ -325,6 +338,7 @@ class ScanGroupBox(QGroupBox):
         for widget in list(self.widgets):
             if isinstance(widget, DeviceLineEdit):
                 self.selected_devices.pop(widget, None)
+            self._widget_configs.pop(widget, None)
             widget.close()
             widget.deleteLater()
             self.layout.removeWidget(widget)
@@ -423,3 +437,119 @@ class ScanGroupBox(QGroupBox):
                 if widget.arg_name == key:
                     WidgetIO.set_value(widget, value)
                     break
+
+    @staticmethod
+    def _unit_tooltip(item: dict, units: str | None = None) -> str | None:
+        tooltip = item.get("tooltip", None)
+        reference_units = item.get("reference_units", None)
+        units = units or item.get("units", None)
+        tooltip_parts = [tooltip] if tooltip else []
+        if units:
+            tooltip_parts.append(f"Units: {units}")
+        elif reference_units:
+            tooltip_parts.append(f"Units from: {reference_units}")
+        if tooltip_parts:
+            return "\n".join(tooltip_parts)
+        return None
+
+    def _apply_unit_metadata(self, widget, item: dict, units: str | None = None) -> None:
+        units = units or item.get("units", None)
+        tooltip = self._unit_tooltip(item, units)
+        widget.setToolTip(tooltip or "")
+        if hasattr(widget, "setSuffix"):
+            widget.setSuffix(f" {units}" if units else "")
+
+    def _refresh_column_label(self, column: int, item: dict) -> None:
+        if column not in self._column_labels:
+            return
+        self._column_labels[column].setText(item.get("display_name", item.get("name", None)))
+
+    @staticmethod
+    def _device_units(device) -> str | None:
+        egu = getattr(device, "egu", None)
+        if not callable(egu):
+            return None
+        try:
+            return egu()
+        except Exception:
+            logger.exception("Failed to fetch engineering units from device %s", device)
+            return None
+
+    def _widget_position(self, widget) -> tuple[int, int] | None:
+        for row in range(self.layout.rowCount()):
+            for column in range(self.layout.columnCount()):
+                item = self.layout.itemAtPosition(row, column)
+                if item is not None and item.widget() is widget:
+                    return row, column
+        return None
+
+    def _update_reference_units(self, device_widget: DeviceLineEdit, units: str | None) -> None:
+        position = self._widget_position(device_widget)
+        if position is None:
+            return
+        source_row, _ = position
+        source_name = device_widget.arg_name
+
+        for widget in self.widgets:
+            item = self._widget_configs.get(widget, {})
+            if item.get("reference_units") != source_name:
+                continue
+            widget_position = self._widget_position(widget)
+            if widget_position is None:
+                continue
+            row, column = widget_position
+            if self.box_type == "args" and row != source_row:
+                continue
+            self._apply_unit_metadata(widget, item, units)
+            self._refresh_column_label(column, item)
+
+    def _handle_device_text_changed(self, device_widget: DeviceLineEdit, device_name: str) -> None:
+        if not device_widget.validate_device(device_name):
+            self.selected_devices[device_widget] = ""
+            self._update_reference_units(device_widget, None)
+
+    @staticmethod
+    def _apply_numeric_precision(widget: ScanDoubleSpinBox, item: dict) -> None:
+        if not isinstance(widget, ScanDoubleSpinBox):
+            return
+
+        precision = item.get("precision")
+        if precision is None:
+            return
+
+        try:
+            widget.setDecimals(max(0, int(precision)))
+        except (TypeError, ValueError):
+            logger.warning(
+                "Ignoring invalid precision %r for parameter %s", precision, item.get("name")
+            )
+
+    @staticmethod
+    def _apply_numeric_limits(widget: ScanDoubleSpinBox | ScanSpinBox, item: dict) -> None:
+        if isinstance(widget, ScanSpinBox):
+            minimum = -2147483647  # largest int which qt allows
+            maximum = 2147483647
+            if item.get("ge") is not None:
+                minimum = int(item["ge"])
+            if item.get("gt") is not None:
+                minimum = int(item["gt"]) + 1
+            if item.get("le") is not None:
+                maximum = int(item["le"])
+            if item.get("lt") is not None:
+                maximum = int(item["lt"]) - 1
+            widget.setRange(minimum, maximum)
+            return
+
+        if isinstance(widget, ScanDoubleSpinBox):
+            minimum = -float("inf")
+            maximum = float("inf")
+            step = 10 ** (-widget.decimals())
+            if item.get("ge") is not None:
+                minimum = float(item["ge"])
+            if item.get("gt") is not None:
+                minimum = float(item["gt"]) + step
+            if item.get("le") is not None:
+                maximum = float(item["le"])
+            if item.get("lt") is not None:
+                maximum = float(item["lt"]) - step
+            widget.setRange(minimum, maximum)

bec_widgets/widgets/control/scan_control/scan_info_adapter.py

@@ -0,0 +1,243 @@
+"""Helpers for translating BEC scan metadata into ScanControl UI configuration."""
+
+from __future__ import annotations
+
+import re
+from typing import Any
+
+AnnotationValue = str | dict[str, Any] | list[Any] | None
+ScanArgumentMetadata = dict[str, Any]
+SignatureEntry = dict[str, Any]
+ScanInputConfig = dict[str, Any]
+ScanInfo = dict[str, Any]
+ScanUIConfig = dict[str, Any]
+
+
+class ScanInfoAdapter:
+    """Normalize available-scan payloads into the structure consumed by ``ScanControl``."""
+
+    @staticmethod
+    def has_scan_ui_config(scan_info: ScanInfo) -> bool:
+        """Check whether a scan exposes enough metadata to build a UI.
+
+        Args:
+            scan_info (ScanInfo): Available-scan payload for one scan.
+
+        Returns:
+            bool: ``True`` when a supported GUI metadata field is present.
+        """
+        return bool(scan_info.get("gui_visibility") or scan_info.get("gui_config"))
+
+    @staticmethod
+    def format_display_name(name: str) -> str:
+        """Convert a parameter name into a user-facing label.
+
+        Args:
+            name (str): Raw parameter name.
+
+        Returns:
+            str: Formatted display label such as ``Exp Time``.
+        """
+        parts = re.split(r"(_|\d+)", name)
+        return " ".join(part.capitalize() for part in parts if part.isalnum()).strip()
+
+    @staticmethod
+    def resolve_tooltip(scan_argument: ScanArgumentMetadata) -> str | None:
+        """Resolve the tooltip text from parsed ``ScanArgument`` metadata.
+
+        Args:
+            scan_argument (ScanArgumentMetadata): Parsed ``ScanArgument`` metadata.
+
+        Returns:
+            str | None: Explicit tooltip text if provided, otherwise the description fallback.
+        """
+        return scan_argument.get("tooltip") or scan_argument.get("description")
+
+    @staticmethod
+    def parse_annotation(
+        annotation: AnnotationValue,
+    ) -> tuple[AnnotationValue, ScanArgumentMetadata]:
+        """Extract the serialized base annotation and ``ScanArgument`` metadata.
+
+        Args:
+            annotation (AnnotationValue): Serialized annotation payload from BEC.
+
+        Returns:
+            tuple[AnnotationValue, ScanArgumentMetadata]: The unwrapped annotation and parsed
+            ``ScanArgument`` metadata.
+        """
+        scan_argument: ScanArgumentMetadata = {}
+        if isinstance(annotation, list):
+            annotation = next(
+                (entry for entry in annotation if entry != "NoneType"),
+                annotation[0] if annotation else "_empty",
+            )
+        if isinstance(annotation, dict) and "Annotated" in annotation:
+            annotated = annotation["Annotated"]
+            annotation = annotated.get("type", "_empty")
+            scan_argument = annotated.get("metadata", {}).get("ScanArgument", {}) or {}
+        return annotation, scan_argument
+
+    @staticmethod
+    def scan_arg_type_from_annotation(annotation: AnnotationValue) -> AnnotationValue:
+        """Normalize an annotation value to the widget type expected by ``ScanControl``.
+
+        Args:
+            annotation (AnnotationValue): Serialized or parsed annotation value.
+
+        Returns:
+            AnnotationValue: The normalized type identifier used by the widget layer.
+        """
+        if isinstance(annotation, dict):
+            return annotation
+        if annotation in ("_empty", None):
+            return "str"
+        return annotation
+
+    def scan_input_from_signature(
+        self, param: SignatureEntry, arg: bool = False
+    ) -> ScanInputConfig:
+        """Build one ScanControl input description from a signature entry.
+
+        Args:
+            param (SignatureEntry): Serialized signature entry.
+            arg (bool): Whether the parameter belongs to the positional arg bundle.
+
+        Returns:
+            ScanInputConfig: Normalized input configuration for ``ScanControl``.
+        """
+        annotation, scan_argument = self.parse_annotation(param.get("annotation"))
+        return self._build_scan_input(
+            name=param["name"],
+            annotation=annotation,
+            scan_argument=scan_argument,
+            arg=arg,
+            default=None if arg else param.get("default", None),
+        )
+
+    def scan_input_from_arg_input(
+        self, name: str, item_type: AnnotationValue, signature_by_name: dict[str, SignatureEntry]
+    ) -> ScanInputConfig:
+        """Build one arg-bundle input description from ``arg_input`` metadata.
+
+        Args:
+            name (str): Argument name from ``arg_input``.
+            item_type (AnnotationValue): Serialized argument type from ``arg_input``.
+            signature_by_name (dict[str, SignatureEntry]): Signature entries indexed by
+                parameter name.
+
+        Returns:
+            ScanInputConfig: Normalized input configuration for one arg-bundle field.
+        """
+        if name in signature_by_name:
+            scan_input = self.scan_input_from_signature(signature_by_name[name], arg=True)
+            scan_input["type"] = self.scan_arg_type_from_annotation(
+                self.parse_annotation(signature_by_name[name].get("annotation"))[0]
+            )
+        else:
+            annotation, scan_argument = self.parse_annotation(item_type)
+            scan_input = self._build_scan_input(
+                name=name,
+                annotation=annotation,
+                scan_argument=scan_argument,
+                arg=True,
+                default=None,
+            )
+        if scan_input["type"] in ("_empty", None):
+            scan_input["type"] = item_type
+        return scan_input
+
+    def _build_scan_input(
+        self,
+        name: str,
+        annotation: AnnotationValue,
+        scan_argument: ScanArgumentMetadata,
+        *,
+        arg: bool,
+        default: Any,
+    ) -> ScanInputConfig:
+        """Build one normalized ScanControl input configuration.
+
+        Args:
+            name (str): Parameter name.
+            annotation (AnnotationValue): Parsed annotation value.
+            scan_argument (ScanArgumentMetadata): Parsed ``ScanArgument`` metadata.
+            arg (bool): Whether the parameter belongs to the positional arg bundle.
+            default (Any): Default value for the parameter.
+
+        Returns:
+            ScanInputConfig: Normalized input configuration.
+        """
+        return {
+            "arg": arg,
+            "name": name,
+            "type": self.scan_arg_type_from_annotation(annotation),
+            "display_name": scan_argument.get("display_name") or self.format_display_name(name),
+            "tooltip": self.resolve_tooltip(scan_argument),
+            "default": default,
+            "expert": scan_argument.get("expert", False),
+            "precision": scan_argument.get("precision"),
+            "units": scan_argument.get("units"),
+            "reference_units": scan_argument.get("reference_units"),
+            "gt": scan_argument.get("gt"),
+            "ge": scan_argument.get("ge"),
+            "lt": scan_argument.get("lt"),
+            "le": scan_argument.get("le"),
+            "alternative_group": scan_argument.get("alternative_group"),
+        }
+
+    def build_scan_ui_config(self, scan_info: ScanInfo) -> ScanUIConfig:
+        """Normalize one available-scan entry into the widget UI configuration.
+
+        Args:
+            scan_info (ScanInfo): Available-scan payload for one scan.
+
+        Returns:
+            ScanUIConfig: Legacy group structure consumed by ``ScanControl`` and
+            ``ScanGroupBox``.
+        """
+        gui_visualization = (
+            scan_info.get("gui_visualization") or scan_info.get("gui_visibility") or {}
+        )
+        if not gui_visualization and scan_info.get("gui_config"):
+            return scan_info["gui_config"]
+
+        signature = scan_info.get("signature", [])
+        signature_by_name = {entry["name"]: entry for entry in signature}
+
+        arg_group = None
+        arg_input = scan_info.get("arg_input", {})
+        if isinstance(arg_input, dict) and arg_input:
+            bundle_size = scan_info.get("arg_bundle_size", {})
+            inputs = [
+                self.scan_input_from_arg_input(name, item_type, signature_by_name)
+                for name, item_type in arg_input.items()
+            ]
+            arg_group = {
+                "name": "Scan Arguments",
+                "bundle": bundle_size.get("bundle"),
+                "arg_inputs": arg_input,
+                "inputs": inputs,
+                "min": bundle_size.get("min"),
+                "max": bundle_size.get("max"),
+            }
+
+        kwarg_groups = []
+        arg_names = set(arg_input) if isinstance(arg_input, dict) else set()
+        for group_name, input_names in gui_visualization.items():
+            inputs = []
+            for input_name in input_names:
+                if input_name in arg_names or input_name not in signature_by_name:
+                    continue
+                param = signature_by_name[input_name]
+                if param.get("kind") in ("VAR_POSITIONAL", "VAR_KEYWORD"):
+                    continue
+                inputs.append(self.scan_input_from_signature(param))
+            if inputs:
+                kwarg_groups.append({"name": group_name, "inputs": inputs})
+
+        return {
+            "scan_class_name": scan_info.get("class"),
+            "arg_group": arg_group,
+            "kwarg_groups": kwarg_groups,
+        }

tests/unit_tests/test_scan_control.py

@@ -277,6 +277,133 @@ def test_populate_scans(scan_control, mocked_client):
     assert sorted(items) == sorted(expected_scans)
 
 
+def test_scan_control_uses_gui_visibility_and_signature(qtbot, mocked_client):
+    scan_info = {
+        "class": "AnnotatedScan",
+        "base_class": "ScanBase",
+        "arg_input": {
+            "device": "DeviceBase",
+            "start": {
+                "Annotated": {
+                    "type": "float",
+                    "metadata": {
+                        "ScanArgument": {
+                            "display_name": "Start Position",
+                            "description": "Start position",
+                            "tooltip": "Custom start tooltip",
+                            "expert": False,
+                            "alternative_group": None,
+                            "units": None,
+                            "reference_units": "device",
+                        }
+                    },
+                }
+            },
+            "stop": {
+                "Annotated": {
+                    "type": "float",
+                    "metadata": {
+                        "ScanArgument": {
+                            "display_name": None,
+                            "description": "Stop position",
+                            "tooltip": None,
+                            "expert": False,
+                            "alternative_group": None,
+                            "units": None,
+                            "reference_units": "device",
+                        }
+                    },
+                }
+            },
+        },
+        "arg_bundle_size": {"bundle": 3, "min": 1, "max": None},
+        "gui_visibility": {
+            "Movement Parameters": ["steps", "step_size"],
+            "Acquisition Parameters": ["exp_time", "relative"],
+        },
+        "required_kwargs": [],
+        "signature": [
+            {"name": "args", "kind": "VAR_POSITIONAL", "default": "_empty", "annotation": "_empty"},
+            {"name": "steps", "kind": "KEYWORD_ONLY", "default": 10, "annotation": "int"},
+            {
+                "name": "step_size",
+                "kind": "KEYWORD_ONLY",
+                "default": None,
+                "annotation": {
+                    "Annotated": {
+                        "type": "float",
+                        "metadata": {
+                            "ScanArgument": {
+                                "display_name": "Step Size Custom",
+                                "description": "Step size",
+                                "tooltip": "Custom step tooltip",
+                                "expert": False,
+                                "alternative_group": "scan_resolution",
+                                "units": "mm",
+                                "reference_units": None,
+                            }
+                        },
+                    }
+                },
+            },
+            {
+                "name": "exp_time",
+                "kind": "KEYWORD_ONLY",
+                "default": 0,
+                "annotation": {
+                    "Annotated": {
+                        "type": "float",
+                        "metadata": {
+                            "ScanArgument": {
+                                "display_name": None,
+                                "description": None,
+                                "tooltip": "Exposure time",
+                                "expert": False,
+                                "alternative_group": None,
+                                "units": "s",
+                                "reference_units": None,
+                            }
+                        },
+                    }
+                },
+            },
+            {"name": "relative", "kind": "KEYWORD_ONLY", "default": False, "annotation": "bool"},
+            {"name": "kwargs", "kind": "VAR_KEYWORD", "default": "_empty", "annotation": "_empty"},
+        ],
+    }
+    mocked_client.connector.set(
+        MessageEndpoints.available_scans(),
+        AvailableResourceMessage(resource={"annotated_scan": scan_info}),
+    )
+
+    widget = ScanControl(client=mocked_client)
+    qtbot.addWidget(widget)
+    qtbot.waitExposed(widget)
+    widget.comboBox_scan_selection.setCurrentText("annotated_scan")
+
+    assert widget.comboBox_scan_selection.count() == 1
+    assert widget.arg_box.layout.itemAtPosition(0, 1).widget().text() == "Start Position"
+    assert widget.arg_box.widgets[1].toolTip() == "Custom start tooltip\nUnits from: device"
+    with patch.object(mocked_client.device_manager.devices.samx, "egu", return_value="mm"):
+        WidgetIO.set_value(widget.arg_box.widgets[0], "samx")
+    assert widget.arg_box.layout.itemAtPosition(0, 1).widget().text() == "Start Position"
+    assert widget.arg_box.widgets[1].suffix() == " mm"
+    assert widget.arg_box.widgets[1].toolTip() == "Custom start tooltip\nUnits: mm"
+    widget.arg_box.widgets[0].setText("not_a_device")
+    assert widget.arg_box.layout.itemAtPosition(0, 1).widget().text() == "Start Position"
+    assert widget.arg_box.widgets[1].suffix() == ""
+    assert widget.arg_box.widgets[1].toolTip() == "Custom start tooltip\nUnits from: device"
+    assert [box.title() for box in widget.kwarg_boxes] == [
+        "Movement Parameters",
+        "Acquisition Parameters",
+    ]
+    assert widget.kwarg_boxes[0].layout.itemAtPosition(0, 1).widget().text() == "Step Size Custom"
+    assert widget.kwarg_boxes[0].widgets[1].suffix() == " mm"
+    assert widget.kwarg_boxes[0].widgets[1].toolTip() == "Custom step tooltip\nUnits: mm"
+    assert widget.kwarg_boxes[1].layout.itemAtPosition(0, 0).widget().text() == "Exp Time"
+    assert widget.kwarg_boxes[1].widgets[0].toolTip() == "Exposure time\nUnits: s"
+
+
 def test_current_scan(scan_control, mocked_client):
     current_scan = scan_control.current_scan
     wrong_scan = "error_scan"

tests/unit_tests/test_scan_control_group_box.py

@@ -157,3 +157,81 @@ def test_arg_box(qtbot):
     # Widget 2
     assert arg_box.widgets[2].__class__.__name__ == "ScanSpinBox"
     assert arg_box.widgets[2].arg_name
+
+
+def test_spinbox_limits_from_scan_info(qtbot):
+    group_input = {
+        "name": "Kwarg Test",
+        "inputs": [
+            {
+                "arg": False,
+                "name": "exp_time",
+                "type": "float",
+                "display_name": "Exp Time",
+                "tooltip": "Exposure time in seconds",
+                "default": 2.0,
+                "expert": False,
+                "precision": 3,
+                "gt": 1.5,
+                "ge": None,
+                "lt": 5.0,
+                "le": None,
+            },
+            {
+                "arg": False,
+                "name": "num_points",
+                "type": "int",
+                "display_name": "Num Points",
+                "tooltip": "Number of points",
+                "default": 4,
+                "expert": False,
+                "gt": None,
+                "ge": 3,
+                "lt": 9,
+                "le": None,
+            },
+            {
+                "arg": False,
+                "name": "settling_time",
+                "type": "float",
+                "display_name": "Settling Time",
+                "tooltip": "Settling time in seconds",
+                "default": 0.5,
+                "expert": False,
+                "gt": None,
+                "ge": 0.2,
+                "lt": None,
+                "le": 3.5,
+            },
+            {
+                "arg": False,
+                "name": "steps",
+                "type": "int",
+                "display_name": "Steps",
+                "tooltip": "Number of steps",
+                "default": 4,
+                "expert": False,
+                "gt": 0,
+                "ge": None,
+                "lt": None,
+                "le": 10,
+            },
+        ],
+    }
+
+    kwarg_box = ScanGroupBox(box_type="kwargs", config=group_input)
+
+    exp_time = kwarg_box.widgets[0]
+    num_points = kwarg_box.widgets[1]
+    settling_time = kwarg_box.widgets[2]
+    steps = kwarg_box.widgets[3]
+
+    assert exp_time.decimals() == 3
+    assert exp_time.minimum() == 1.501
+    assert exp_time.maximum() == 4.999
+    assert num_points.minimum() == 3
+    assert num_points.maximum() == 8
+    assert settling_time.minimum() == 0.2
+    assert settling_time.maximum() == 3.5
+    assert steps.minimum() == 1
+    assert steps.maximum() == 10