refactor: use list of expandable for available devices

bec_widgets/examples/device_manager_view/device_manager_view.py

@@ -0,0 +1,214 @@
+from typing import List
+
+import PySide6QtAds as QtAds
+import yaml
+from bec_qthemes import material_icon
+from PySide6QtAds import CDockManager, CDockWidget
+from qtpy.QtCore import Qt, QTimer
+from qtpy.QtWidgets import (
+    QPushButton,
+    QSizePolicy,
+    QSplitter,
+    QStackedLayout,
+    QTreeWidget,
+    QVBoxLayout,
+    QWidget,
+)
+
+from bec_widgets import BECWidget
+from bec_widgets.utils.error_popups import SafeSlot
+from bec_widgets.widgets.containers.advanced_dock_area.advanced_dock_area import AdvancedDockArea
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.available_device_resources import (
+    AvailableDeviceResources,
+)
+from bec_widgets.widgets.control.device_manager.components.device_table_view import DeviceTableView
+from bec_widgets.widgets.control.device_manager.components.dm_config_view import DMConfigView
+from bec_widgets.widgets.control.device_manager.components.dm_ophyd_test import (
+    DeviceManagerOphydTest,
+)
+from bec_widgets.widgets.editors.monaco.monaco_widget import MonacoWidget
+from bec_widgets.widgets.editors.web_console.web_console import WebConsole
+from bec_widgets.widgets.services.bec_status_box.bec_status_box import BECStatusBox
+from bec_widgets.widgets.utility.ide_explorer.ide_explorer import IDEExplorer
+
+
+def set_splitter_weights(splitter: QSplitter, weights: List[float]) -> None:
+    """
+    Apply initial sizes to a splitter using weight ratios, e.g. [1,3,2,1].
+    Works for horizontal or vertical splitters and sets matching stretch factors.
+    """
+
+    def apply():
+        n = splitter.count()
+        if n == 0:
+            return
+        w = list(weights[:n]) + [1] * max(0, n - len(weights))
+        w = [max(0.0, float(x)) for x in w]
+        tot_w = sum(w)
+        if tot_w <= 0:
+            w = [1.0] * n
+            tot_w = float(n)
+        total_px = (
+            splitter.width() if splitter.orientation() == Qt.Horizontal else splitter.height()
+        )
+        if total_px < 2:
+            QTimer.singleShot(0, apply)
+            return
+        sizes = [max(1, int(total_px * (wi / tot_w))) for wi in w]
+        diff = total_px - sum(sizes)
+        if diff != 0:
+            idx = max(range(n), key=lambda i: w[i])
+            sizes[idx] = max(1, sizes[idx] + diff)
+        splitter.setSizes(sizes)
+        for i, wi in enumerate(w):
+            splitter.setStretchFactor(i, max(1, int(round(wi * 100))))
+
+    QTimer.singleShot(0, apply)
+
+
+class DeviceManagerView(BECWidget, QWidget):
+
+    def __init__(self, parent=None, *args, **kwargs):
+        super().__init__(parent, *args, **kwargs)
+
+        # Top-level layout hosting a toolbar and the dock manager
+        self._root_layout = QVBoxLayout(self)
+        self._root_layout.setContentsMargins(0, 0, 0, 0)
+        self._root_layout.setSpacing(0)
+        self.dock_manager = CDockManager(self)
+        self._root_layout.addWidget(self.dock_manager)
+
+        # Initialize the widgets
+        self.available_devices = AvailableDeviceResources(self)
+        self.device_table_view = DeviceTableView(self)
+        # Placeholder
+        self.dm_config_view = DMConfigView(self)
+
+        # Placeholder for ophyd test
+        WebConsole.startup_cmd = "ipython"
+        self.ophyd_test = DeviceManagerOphydTest(self)
+        self.ophyd_test_dock = QtAds.CDockWidget("Ophyd Test", self)
+        self.ophyd_test_dock.setWidget(self.ophyd_test)
+
+        # Create the dock widgets
+        self.available_devices_dock = QtAds.CDockWidget("Explorer", self)
+        self.available_devices_dock.setWidget(self.available_devices)
+
+        self.device_table_view_dock = QtAds.CDockWidget("Device Table", self)
+        self.device_table_view_dock.setWidget(self.device_table_view)
+
+        # Device Table will be central widget
+        self.dock_manager.setCentralWidget(self.device_table_view_dock)
+
+        self.dm_config_view_dock = QtAds.CDockWidget("YAML Editor", self)
+        self.dm_config_view_dock.setWidget(self.dm_config_view)
+
+        # Add the dock widgets to the dock manager
+        self.dock_manager.addDockWidget(
+            QtAds.DockWidgetArea.LeftDockWidgetArea, self.available_devices_dock
+        )
+        monaco_yaml_area = self.dock_manager.addDockWidget(
+            QtAds.DockWidgetArea.RightDockWidgetArea, self.dm_config_view_dock
+        )
+        self.dock_manager.addDockWidget(
+            QtAds.DockWidgetArea.BottomDockWidgetArea, self.ophyd_test_dock, monaco_yaml_area
+        )
+
+        for dock in self.dock_manager.dockWidgets():
+            # dock.setFeature(CDockWidget.DockWidgetDeleteOnClose, True)#TODO implement according to MonacoDock or AdvancedDockArea
+            # dock.setFeature(CDockWidget.CustomCloseHandling, True) #TODO same
+            dock.setFeature(CDockWidget.DockWidgetClosable, False)
+            dock.setFeature(CDockWidget.DockWidgetFloatable, False)
+            dock.setFeature(CDockWidget.DockWidgetMovable, False)
+
+        # Fetch all dock areas of the dock widgets (on our case always one dock area)
+        for dock in self.dock_manager.dockWidgets():
+            area = dock.dockAreaWidget()
+            area.titleBar().setVisible(False)
+
+        # Apply stretch after the layout is done
+        self.set_default_view([2, 5, 3], [5, 5])
+
+        # Connect slots
+        self.device_table_view.selected_device.connect(self.dm_config_view.on_select_config)
+        self.device_table_view.model.devices_reset.connect(
+            self.available_devices.update_devices_state
+        )
+
+    ####### Default view has to be done with setting up splitters ########
+    def set_default_view(self, horizontal_weights: list, vertical_weights: list):
+        """Apply initial weights to every horizontal and vertical splitter.
+
+        Examples:
+            horizontal_weights = [1, 3, 2, 1]
+            vertical_weights   = [3, 7]  # top:bottom = 30:70
+        """
+        splitters_h = []
+        splitters_v = []
+        for splitter in self.findChildren(QSplitter):
+            if splitter.orientation() == Qt.Horizontal:
+                splitters_h.append(splitter)
+            elif splitter.orientation() == Qt.Vertical:
+                splitters_v.append(splitter)
+
+        def apply_all():
+            for s in splitters_h:
+                set_splitter_weights(s, horizontal_weights)
+            for s in splitters_v:
+                set_splitter_weights(s, vertical_weights)
+
+        QTimer.singleShot(0, apply_all)
+
+    def set_stretch(self, *, horizontal=None, vertical=None):
+        """Update splitter weights and re-apply to all splitters.
+
+        Accepts either a list/tuple of weights (e.g., [1,3,2,1]) or a role dict
+        for convenience: horizontal roles = {"left","center","right"},
+        vertical roles = {"top","bottom"}.
+        """
+
+        def _coerce_h(x):
+            if x is None:
+                return None
+            if isinstance(x, (list, tuple)):
+                return list(map(float, x))
+            if isinstance(x, dict):
+                return [
+                    float(x.get("left", 1)),
+                    float(x.get("center", x.get("middle", 1))),
+                    float(x.get("right", 1)),
+                ]
+            return None
+
+        def _coerce_v(x):
+            if x is None:
+                return None
+            if isinstance(x, (list, tuple)):
+                return list(map(float, x))
+            if isinstance(x, dict):
+                return [float(x.get("top", 1)), float(x.get("bottom", 1))]
+            return None
+
+        h = _coerce_h(horizontal)
+        v = _coerce_v(vertical)
+        if h is None:
+            h = [1, 1, 1]
+        if v is None:
+            v = [1, 1]
+        self.set_default_view(h, v)
+
+
+if __name__ == "__main__":
+    import sys
+
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    device_manager_view = DeviceManagerView()
+    config = device_manager_view.client.device_manager._get_redis_device_config()
+    device_manager_view.device_table_view.set_device_config(config)
+    device_manager_view.show()
+    device_manager_view.setWindowTitle("Device Manager View")
+    device_manager_view.resize(1200, 800)
+    # developer_view.set_stretch(horizontal=[1, 3, 2], vertical=[5, 5]) #can be set during runtime
+    sys.exit(app.exec_())

bec_widgets/examples/device_manager_view/device_manager_widget.py

@@ -0,0 +1,73 @@
+"""Top Level wrapper for device_manager widget"""
+
+from __future__ import annotations
+
+from bec_qthemes import material_icon
+from qtpy import QtCore, QtWidgets
+
+from bec_widgets.examples.device_manager_view.device_manager_view import DeviceManagerView
+from bec_widgets.utils.bec_widget import BECWidget
+from bec_widgets.utils.error_popups import SafeSlot
+
+
+class DeviceManagerWidget(BECWidget, QtWidgets.QWidget):
+
+    def __init__(self, parent=None, client=None):
+        super().__init__(client=client, parent=parent)
+        self.stacked_layout = QtWidgets.QStackedLayout()
+        self.stacked_layout.setContentsMargins(0, 0, 0, 0)
+        self.stacked_layout.setSpacing(0)
+        self.stacked_layout.setStackingMode(QtWidgets.QStackedLayout.StackAll)
+        self.setLayout(self.stacked_layout)
+
+        # Add device manager view
+        self.device_manager_view = DeviceManagerView()
+        self.stacked_layout.addWidget(self.device_manager_view)
+
+        # Add overlay widget
+        self._overlay_widget = QtWidgets.QWidget(self)
+        self._customize_overlay()
+        self.stacked_layout.addWidget(self._overlay_widget)
+        self.stacked_layout.setCurrentWidget(self._overlay_widget)
+
+    def _customize_overlay(self):
+        self._overlay_widget.setStyleSheet(
+            "background: qlineargradient(x1:0, y1:0, x2:0, y2:1,stop:0 #ffffff, stop:1 #e0e0e0);"
+        )
+        self._overlay_widget.setAutoFillBackground(True)
+        self._overlay_layout = QtWidgets.QVBoxLayout()
+        self._overlay_layout.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
+        self._overlay_widget.setLayout(self._overlay_layout)
+        self._overlay_widget.setSizePolicy(
+            QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Expanding
+        )
+        self.button_load_current_config = QtWidgets.QPushButton("Load Current Config")
+        icon = material_icon(icon_name="database", size=(24, 24), convert_to_pixmap=False)
+        self.button_load_current_config.setIcon(icon)
+        self._overlay_layout.addWidget(self.button_load_current_config)
+        self.button_load_current_config.clicked.connect(self._load_config_clicked)
+        self._overlay_widget.setVisible(True)
+
+    @SafeSlot()
+    def _load_config_clicked(self):
+        """Handle click on 'Load Current Config' button."""
+        config = self.client.device_manager._get_redis_device_config()
+        self.device_manager_view.device_table_view.set_device_config(config)
+        self.device_manager_view.ophyd_test.on_device_config_update(config)
+        self.stacked_layout.setCurrentWidget(self.device_manager_view)
+
+
+if __name__ == "__main__":
+    import sys
+
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    device_manager = DeviceManagerWidget()
+    # config = device_manager.client.device_manager._get_redis_device_config()
+    # device_manager.device_table_view.set_device_config(config)
+    device_manager.show()
+    device_manager.setWindowTitle("Device Manager View")
+    device_manager.resize(1600, 1200)
+    # developer_view.set_stretch(horizontal=[1, 3, 2], vertical=[5, 5]) #can be set during runtime
+    sys.exit(app.exec_())

bec_widgets/utils/expandable_frame.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from bec_qthemes import material_icon
-from qtpy.QtCore import Signal
+from qtpy.QtCore import QSize, Signal
 from qtpy.QtWidgets import (
     QApplication,
     QFrame,
@@ -19,7 +19,8 @@ from bec_widgets.utils.error_popups import SafeProperty, SafeSlot
 
 
 class ExpandableGroupFrame(QFrame):
-
+    broadcast_size_hint = Signal(QSize)
+    imminent_deletion = Signal()
     expansion_state_changed = Signal()
 
     EXPANDED_ICON_NAME: str = "collapse_all"
@@ -31,6 +32,7 @@ class ExpandableGroupFrame(QFrame):
         super().__init__(parent=parent)
         self._expanded = expanded
 
+        self._title_text = f"<b>{title}</b>"
         self.setFrameStyle(QFrame.Shape.StyledPanel | QFrame.Shadow.Plain)
         self.setSizePolicy(QSizePolicy.Policy.Minimum, QSizePolicy.Policy.Minimum)
         self._layout = QVBoxLayout()
@@ -49,21 +51,27 @@ class ExpandableGroupFrame(QFrame):
     def _create_title_layout(self, title: str, icon: str):
         self._title_layout = QHBoxLayout()
         self._layout.addLayout(self._title_layout)
+        self._internal_title_layout = QHBoxLayout()
+        self._title_layout.addLayout(self._internal_title_layout)
 
-        self._title = ClickableLabel(f"<b>{title}</b>")
+        self._title = ClickableLabel()
+        self._set_title_text(self._title_text)
         self._title_icon = ClickableLabel()
-        self._title_layout.addWidget(self._title_icon)
-        self._title_layout.addWidget(self._title)
+        self._internal_title_layout.addWidget(self._title_icon)
+        self._internal_title_layout.addWidget(self._title)
         self.icon_name = icon
         self._title.clicked.connect(self.switch_expanded_state)
         self._title_icon.clicked.connect(self.switch_expanded_state)
 
-        self._title_layout.addStretch(1)
+        self._internal_title_layout.addStretch(1)
 
         self._expansion_button = QToolButton()
         self._update_expansion_icon()
         self._title_layout.addWidget(self._expansion_button, stretch=1)
 
+    def get_title_layout(self) -> QHBoxLayout:
+        return self._internal_title_layout
+
     def set_layout(self, layout: QLayout) -> None:
         self._contents.setLayout(layout)
         self._contents.layout().setContentsMargins(0, 0, 0, 0)  # type: ignore
@@ -112,6 +120,18 @@ class ExpandableGroupFrame(QFrame):
         else:
             self._title_icon.setVisible(False)
 
+    @SafeProperty(str)
+    def title_text(self):  # type: ignore
+        return self._title_text
+
+    @title_text.setter
+    def title_text(self, title_text: str):
+        self._title_text = title_text
+        self._set_title_text(self._title_text)
+
+    def _set_title_text(self, title_text: str):
+        self._title.setText(title_text)
+
 
 # Application example
 if __name__ == "__main__":  # pragma: no cover

bec_widgets/utils/list_of_expandable_frames.py

@@ -0,0 +1,81 @@
+from functools import partial
+from typing import Generic, Iterable, NamedTuple, TypeVar
+
+from bec_lib.logger import bec_logger
+from PySide6.QtWidgets import QListWidgetItem, QWidget
+from qtpy.QtCore import QSize
+from qtpy.QtWidgets import QListWidget
+
+from bec_widgets.utils.expandable_frame import ExpandableGroupFrame
+
+logger = bec_logger.logger
+
+_EF = TypeVar("_EF", bound=ExpandableGroupFrame)
+
+
+class ListOfExpandableFrames(QListWidget, Generic[_EF]):
+    def __init__(
+        self, /, parent: QWidget | None = None, item_class: type[_EF] = ExpandableGroupFrame
+    ) -> None:
+        super().__init__(parent)
+        _Items = NamedTuple("_Items", (("item", QListWidgetItem), ("widget", _EF)))
+        self.item_tuple = _Items
+        self._item_class = item_class
+        self._item_dict: dict[str, _Items] = {}
+
+    def __contains__(self, id: str):
+        return id in self._item_dict
+
+    def clear(self) -> None:
+        self._item_dict = {}
+        return super().clear()
+
+    def add_item(self, id: str, *args, **kwargs) -> _EF:
+        """Adds the specified type of widget as an item. args and kwargs are passed to the constructor.
+
+        Args:
+            id (str): the key under which to store the list item in the internal dict
+
+        Returns:
+            The widget created in the addition process
+        """
+
+        def _remove_item(item: QListWidgetItem):
+            self.takeItem(self.row(item))
+            del self._item_dict[id]
+            self.sortItems()
+
+        def _updatesize(item: QListWidgetItem, item_widget: _EF):
+            item_widget.adjustSize()
+            item.setSizeHint(QSize(item_widget.width(), item_widget.height()))
+
+        item = QListWidgetItem(self)
+        item_widget = self._item_class(*args, **kwargs)
+
+        item_widget.expansion_state_changed.connect(partial(_updatesize, item, item_widget))
+        item_widget.imminent_deletion.connect(partial(_remove_item, item))
+        item_widget.broadcast_size_hint.connect(item.setSizeHint)
+
+        self.setItemWidget(item, item_widget)
+        self.addItem(item)
+        self._item_dict[id] = self.item_tuple(item, item_widget)
+
+        item.setSizeHint(item_widget.sizeHint())
+        return item_widget
+
+    def get_item_widget(self, id: str):
+        if (item := self._item_dict.get(id)) is None:
+            return None
+        return item
+
+    def set_hidden(self, ids: Iterable[str]):
+        for id in ids:
+            if (_item := self._item_dict.get(id)) is not None:
+                _item.widget.setHidden(True)
+            else:
+                logger.warning(
+                    f"List {self.__qualname__} does not have an item with ID {id} to hide!"
+                )
+
+    def unhide_all(self):
+        map(lambda i: i.widget.setHidden(False), self._item_dict.values())

bec_widgets/widgets/control/device_manager/components/available_device_resources/__init__.py

@@ -0,0 +1,3 @@
+from .available_device_resources import AvailableDeviceResources
+
+__all__ = ["AvailableDeviceResources"]

bec_widgets/widgets/control/device_manager/components/available_device_resources/available_device_resources.py

@@ -0,0 +1,84 @@
+from random import randint
+from typing import Any, Callable, Generator, Iterable, TypeVar
+
+from qtpy.QtCore import QSize
+from qtpy.QtWidgets import QListWidgetItem, QWidget
+
+from bec_widgets.utils.bec_widget import BECWidget
+from bec_widgets.utils.error_popups import SafeSlot
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.available_device_resources_ui import (
+    Ui_availableDeviceResources,
+)
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_resource_backend import (
+    HashableDevice,
+    get_backend,
+)
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_tag_group import (
+    DeviceTagGroup,
+)
+
+_T = TypeVar("_T")
+_RT = TypeVar("_RT")
+
+
+def _yield_only_passing(fn: Callable[[_T], _RT], vals: Iterable[_T]) -> Generator[_RT, Any, None]:
+    for v in vals:
+        try:
+            yield fn(v)
+        except BaseException:
+            pass
+
+
+class AvailableDeviceResources(BECWidget, QWidget, Ui_availableDeviceResources):
+    def __init__(self, parent=None, **kwargs):
+        super().__init__(parent=parent, **kwargs)
+        self.setupUi(self)
+        self._backend = get_backend()
+        self._items: dict[str, tuple[QListWidgetItem, DeviceTagGroup]] = {}
+        self.refresh_full_list()
+
+    def refresh_full_list(self):
+        self.tag_groups_list.clear()
+        self._items = {}
+        for tag_group, devices in self._backend.tag_groups.items():
+            self._add_tag_group(tag_group, devices)
+        self._add_tag_group("Untagged devices", self._backend.untagged_devices)
+
+    def _add_tag_group(self, tag_group: str, devices: set[HashableDevice]):
+        self.tag_groups_list.add_item(
+            tag_group, self.tag_groups_list, tag_group, devices, expanded=False
+        )
+
+    def _reset_devices_state(self):
+        for _, tag_group in self._items.values():
+            tag_group.reset_devices_state()
+
+    def set_devices_state(self, devices: Iterable[HashableDevice], included: bool):
+        for device in devices:
+            for _, tag_group in self._items.values():
+                tag_group.set_item_state(hash(device), included)
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        for list_item, tag_group_widget in self._items.values():
+            list_item.setSizeHint(tag_group_widget.sizeHint())
+
+    @SafeSlot(list)
+    def update_devices_state(self, config_list: list[dict[str, Any]]):
+        self.set_devices_state(
+            _yield_only_passing(HashableDevice.model_validate, config_list), True
+        )
+
+
+if __name__ == "__main__":
+    import sys
+
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    widget = AvailableDeviceResources()
+    widget.set_devices_state(
+        list(filter(lambda _: randint(0, 1) == 1, widget._backend.all_devices)), True
+    )
+    widget.show()
+    sys.exit(app.exec())

bec_widgets/widgets/control/device_manager/components/available_device_resources/available_device_resources_ui.py

@@ -0,0 +1,32 @@
+from qtpy.QtCore import QMetaObject, Qt
+from qtpy.QtWidgets import QAbstractItemView, QListView, QListWidget, QVBoxLayout
+
+from bec_widgets.utils.list_of_expandable_frames import ListOfExpandableFrames
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_tag_group import (
+    DeviceTagGroup,
+)
+
+
+class Ui_availableDeviceResources(object):
+    def setupUi(self, availableDeviceResources):
+        if not availableDeviceResources.objectName():
+            availableDeviceResources.setObjectName("availableDeviceResources")
+        self.verticalLayout = QVBoxLayout(availableDeviceResources)
+        self.verticalLayout.setObjectName("verticalLayout")
+        self.tag_groups_list = ListOfExpandableFrames(availableDeviceResources, DeviceTagGroup)
+        self.tag_groups_list.setObjectName("tag_groups_list")
+        self.tag_groups_list.setSelectionMode(QAbstractItemView.SelectionMode.NoSelection)
+        self.tag_groups_list.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
+        self.tag_groups_list.setHorizontalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
+        self.tag_groups_list.setMovement(QListView.Movement.Static)
+        self.tag_groups_list.setSpacing(2)
+        self.tag_groups_list.setDragDropMode(QListWidget.DragDropMode.DragOnly)
+        self.tag_groups_list.setDragEnabled(True)
+        self.tag_groups_list.setAcceptDrops(False)
+        self.tag_groups_list.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
+        availableDeviceResources.setMinimumWidth(250)
+        availableDeviceResources.resize(250, availableDeviceResources.height())
+
+        self.verticalLayout.addWidget(self.tag_groups_list)
+
+        QMetaObject.connectSlotsByName(availableDeviceResources)

bec_widgets/widgets/control/device_manager/components/available_device_resources/device_resource_backend.py

@@ -0,0 +1,218 @@
+from __future__ import annotations
+
+import hashlib
+import operator
+import os
+from enum import Enum, auto
+from functools import partial, reduce
+from glob import glob
+from pathlib import Path
+from textwrap import dedent
+from typing import AbstractSet, Protocol
+
+import bec_lib
+from bec_lib.atlas_models import Device
+from bec_lib.bec_yaml_loader import yaml_load
+from bec_lib.logger import bec_logger
+from bec_lib.plugin_helper import plugin_package_name, plugin_repo_path
+from pydantic import model_validator
+
+logger = bec_logger.logger
+
+DEVICE_HASH_MODEL_KEY = "_hash_model"
+_BASE_REPO_PATH = Path(os.path.dirname(bec_lib.__file__)) / "../.."
+
+
+class HashModel(str, Enum):
+    DEFAULT = auto()
+    DEFAULT_DEVICECONFIG = auto()
+    DEFAULT_EPICS = auto()
+
+
+def _hash_input(device: HashableDevice) -> bytes:
+    """Get the data for the hash for this device as a byte string"""
+
+    def _default(device: HashableDevice):
+        """By default, we use name and device class"""
+        return (device.name + device.deviceClass).encode()
+
+    def _default_deviceconfig(device: HashableDevice):
+        config_values = sorted(
+            (str(kv) for kv in device.deviceConfig.items()) if device.deviceConfig else []
+        )
+        return (reduce(operator.add, (device.name, device.deviceClass, *config_values))).encode()
+
+    def _default_epics(device: HashableDevice):
+        """For EPICS devices, we care about the class and the PV prefix"""
+        if device.deviceConfig is None or "prefix" not in device.deviceConfig:
+            logger.warning(
+                f"Device {device.name} doesn't specify a prefix, reverting to default HashModel"
+            )
+            return _default(device)
+        return (device.deviceClass + device.deviceConfig.get("prefix", "")).encode()
+
+    if device.deviceConfig is None or DEVICE_HASH_MODEL_KEY not in device.deviceConfig:
+        return _default(device)
+    try:
+        hash_model = HashModel[device.deviceConfig[DEVICE_HASH_MODEL_KEY]]
+    except KeyError:
+        logger.warning(
+            f"Device {device.name} has invalid config parameter {DEVICE_HASH_MODEL_KEY}:{device.deviceConfig[DEVICE_HASH_MODEL_KEY]}. Please choose one of: {[m.name for m in HashModel]}"
+        )
+        hash_model = HashModel.DEFAULT
+
+    # Type checking should check that all cases are accounted for, otherwise
+    # the return type declaration for the function will be marked wrong.
+    match hash_model:
+        case HashModel.DEFAULT:
+            return _default(device)
+        case HashModel.DEFAULT_DEVICECONFIG:
+            return _default_deviceconfig(device)
+        case HashModel.DEFAULT_EPICS:
+            return _default_epics(device)
+
+
+class HashableDevice(Device):
+    source_files: set[str] = set()
+    names: set[str] = set()
+
+    @model_validator(mode="after")
+    def add_name(self) -> HashableDevice:
+        self.names.add(self.name)
+        return self
+
+    def as_normal_device(self):
+        return Device.model_validate(self)
+
+    def __hash__(self) -> int:
+        return int(hashlib.md5(_hash_input(self)).hexdigest(), 16)
+
+    def __eq__(self, value: object) -> bool:
+        if not isinstance(value, self.__class__):
+            return False
+        if hash(self) == hash(value):
+            return True
+        return False
+
+    def rich_text(self) -> str:
+        return dedent(
+            f"""
+        <b><u><h2> {self.name}: </h2></u></b>
+        <table>
+        <tr><td> description: </td><td><i> {self.description}  </i></td></tr>
+        <tr><td> config:      </td><td><i> {self.deviceConfig} </i></td></tr>
+        <tr><td> enabled:     </td><td><i> {self.enabled}      </i></td></tr>
+        <tr><td> read only:   </td><td><i> {self.readOnly}     </i></td></tr>
+        </table>
+        """
+        )
+
+    def add_sources(self, other: HashableDevice):
+        self.source_files.update(other.source_files)
+
+    def add_tags(self, other: HashableDevice):
+        self.deviceTags.update(other.deviceTags)
+
+    def add_names(self, other: HashableDevice):
+        self.names.update(other.names)
+
+
+class _HashableDeviceSet(set):
+    def __or__(self, value: AbstractSet) -> _HashableDeviceSet:
+        for item in self:
+            if item in value:
+                for other_item in value:
+                    if other_item == item:
+                        item.add_sources(other_item)
+                        item.add_tags(other_item)
+                        item.add_names(other_item)
+        for other_item in value:
+            if other_item not in self:
+                self.add(other_item)
+        return self
+
+
+class DeviceResourceBackend(Protocol):
+    @property
+    def tag_groups(self) -> dict[str, set[HashableDevice]]:
+        """A dictionary of all availble devices separated by tag groups. The same device may
+        appear more than once (in different groups)."""
+        ...
+
+    @property
+    def all_devices(self) -> set[HashableDevice]:
+        """A set of all availble devices. The same device may not appear more than once."""
+        ...
+
+    @property
+    def untagged_devices(self) -> set[HashableDevice]:
+        """A set of all untagged devices. The same device may not appear more than once."""
+        ...
+
+    def tags(self) -> set[str]:
+        """Returns a set of all the tags in all available devices."""
+        ...
+
+    def tag_group(self, tag: str) -> set[HashableDevice]:
+        """Returns a set of the devices in the tag group with the given key."""
+        ...
+
+
+def _devices_from_file(file: str, include_source: bool = True):
+    data = yaml_load(file, process_includes=False)
+    return _HashableDeviceSet(
+        HashableDevice.model_validate(
+            dev | {"name": name, "source_files": {file} if include_source else set()}
+        )
+        for name, dev in data.items()
+    )
+
+
+class _ConfigFileBackend(DeviceResourceBackend):
+    def __init__(self) -> None:
+        self._raw_device_set: set[
+            HashableDevice
+        ] = self._get_config_from_backup_files() | self._get_configs_from_plugin_files(
+            Path(plugin_repo_path()) / plugin_package_name() / "device_configs/"
+        )
+        self._tag_groups = self._get_tag_groups()
+
+    def _get_config_from_backup_files(self):
+        dir = _BASE_REPO_PATH / "logs/device_configs/recovery_configs"
+        files = glob("*.yaml", root_dir=dir)
+        return reduce(
+            operator.or_,
+            map(partial(_devices_from_file, include_source=False), (str(dir / f) for f in files)),
+        )
+
+    def _get_configs_from_plugin_files(self, dir: Path):
+        files = glob("*.yaml", root_dir=dir, recursive=True)
+        return reduce(operator.or_, map(_devices_from_file, (str(dir / f) for f in files)))
+
+    def _get_tag_groups(self) -> dict[str, set[HashableDevice]]:
+        return {
+            tag: set(filter(lambda dev: tag in dev.deviceTags, self._raw_device_set))
+            for tag in self.tags()
+        }
+
+    @property
+    def tag_groups(self):
+        return self._tag_groups
+
+    @property
+    def all_devices(self):
+        return self._raw_device_set
+
+    @property
+    def untagged_devices(self):
+        return {d for d in self._raw_device_set if d.deviceTags == set()}
+
+    def tags(self) -> set[str]:
+        return reduce(operator.or_, (dev.deviceTags for dev in self._raw_device_set))
+
+    def tag_group(self, tag: str) -> set[HashableDevice]:
+        return self.tag_groups[tag]
+
+
+def get_backend() -> DeviceResourceBackend:
+    return _ConfigFileBackend()

bec_widgets/widgets/control/device_manager/components/available_device_resources/device_tag_group.py

@@ -0,0 +1,185 @@
+from typing import NamedTuple
+
+from bec_qthemes import material_icon
+from qtpy.QtCore import QSize
+from qtpy.QtWidgets import QFrame, QHBoxLayout, QLabel, QListWidgetItem, QVBoxLayout, QWidget
+
+from bec_widgets.utils.expandable_frame import ExpandableGroupFrame
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_resource_backend import (
+    HashableDevice,
+)
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_tag_group_ui import (
+    Ui_DeviceTagGroup,
+)
+
+DEVICE_HASH_ROLE = 101
+
+
+def _warning_string(spec: HashableDevice):
+    name_warning = (
+        f"Device defined with multiple names! Please check:\n  {'\n  '.join(spec.names)}\n"
+        if len(spec.names) > 1
+        else ""
+    )
+    source_warning = (
+        f"Device found in multiple source files! Please check:\n  {'\n  '.join(spec.source_files)}"
+        if len(spec.source_files) > 1
+        else ""
+    )
+    return f"{name_warning}{source_warning}"
+
+
+class _DeviceEntryWidget(QFrame):
+    # _grid_size = QSize(120, 80)
+
+    def __init__(self, device_spec: HashableDevice, parent=None, **kwargs):
+        super().__init__(parent, **kwargs)
+        self._device_spec = device_spec
+        self.included: bool = False
+
+        self.setFrameShape(QFrame.Shape.StyledPanel)
+        self.setFrameShadow(QFrame.Shadow.Raised)
+
+        self._layout = QVBoxLayout()
+        self._layout.setContentsMargins(5, 5, 5, 5)
+        self.setLayout(self._layout)
+        # self.setMinimumSize(self._grid_size)
+
+        self.setup_title_layout(device_spec)
+        self.check_and_display_warning()
+
+        self.setToolTip(device_spec.rich_text())
+
+        # self.details = QLabel(f"Tags:\n{', '.join(device_spec.deviceTags)}")
+        # self.details.setStyleSheet("QLabel { font-size: 8pt; }")
+        # self.details.setWordWrap(True)
+        # self._layout.addWidget(self.details)
+
+    def setup_title_layout(self, device_spec: HashableDevice):
+        self._title_layout = QHBoxLayout()
+        self._title_layout.setContentsMargins(0, 0, 0, 0)
+        self._title_container = QWidget(parent=self)
+        self._title_container.setLayout(self._title_layout)
+
+        self._warning_label = QLabel()
+        self._title_layout.addWidget(self._warning_label)
+
+        self.title = QLabel(device_spec.name)
+        self.title.setToolTip(device_spec.name)
+        self.title.setStyleSheet(self.title_style("#FF0000"))
+        self._title_layout.addWidget(self.title)
+
+        self._layout.addWidget(self._title_container)
+
+    def check_and_display_warning(self):
+        if len(self._device_spec.names) == 1 and len(self._device_spec.source_files) == 1:
+            self._warning_label.setText("")
+            self._warning_label.setToolTip("")
+        else:
+            self._warning_label.setPixmap(material_icon("warning", size=(12, 12), color="#FFAA00"))
+            self._warning_label.setToolTip(_warning_string(self._device_spec))
+
+    @property
+    def device_hash(self):
+        return hash(self._device_spec)
+
+    def title_style(self, color: str) -> str:
+        return f"QLabel {{ color: {color}; font-weight: bold; font-size: 10pt; }}"
+
+    def setTitle(self, text: str):
+        self.title.setText(text)
+
+    def set_included(self, included: bool):
+        self.included = included
+        self.title.setStyleSheet(self.title_style("#00FF00" if included else "#FF0000"))
+
+
+class _DeviceEntry(NamedTuple):
+    list_item: QListWidgetItem
+    widget: _DeviceEntryWidget
+
+
+class DeviceTagGroup(ExpandableGroupFrame, Ui_DeviceTagGroup):
+    def __init__(
+        self, parent=None, name: str = "TagGroupTitle", data: set[HashableDevice] = set(), **kwargs
+    ):
+        super().__init__(parent=parent, **kwargs)
+        self.setupUi(self)
+        self.title_text = name
+        self._devices: dict[str, _DeviceEntry] = {}
+        for device in data:
+            self._add_item(device)
+        self.device_list.sortItems()
+        self._update_num_included()
+
+        self.add_to_composition_button.clicked.connect(self.test)
+
+    def _add_item(self, device: HashableDevice):
+        item = QListWidgetItem(self.device_list)
+        widget = _DeviceEntryWidget(device, self)
+        item.setSizeHint(QSize(widget.width(), widget.height()))
+        self.device_list.setItemWidget(item, widget)
+        self.device_list.addItem(item)
+        self._devices[device.name] = _DeviceEntry(item, widget)
+
+    def reset_devices_state(self):
+        for dev in self._devices.values():
+            dev.widget.set_included(False)
+        self._update_num_included()
+
+    def set_item_state(self, /, device_hash: int, included: bool):
+        for dev in self._devices.values():
+            if dev.widget.device_hash == device_hash:
+                dev.widget.set_included(included)
+        self._update_num_included()
+
+    def _update_num_included(self):
+        n_included = sum(int(dev.widget.included) for dev in self._devices.values())
+        if n_included == 0:
+            color = "#FF0000"
+        elif n_included == len(self._devices):
+            color = "#00FF00"
+        else:
+            color = "#FFAA00"
+        self.n_included.setText(f"{n_included} / {len(self._devices)}")
+        self.n_included.setStyleSheet(f"QLabel {{ color: {color}; }}")
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        self.setMinimumHeight(self.sizeHint().height())
+        self.setMaximumHeight(self.sizeHint().height())
+
+    def get_selection(self) -> set[HashableDevice]:
+        selection = self.device_list.selectedItems()
+        widgets = (w.widget for _, w in self._devices.items() if w.list_item in selection)
+        return set(w._device_spec for w in widgets)
+
+    def test(self, *args):
+        print(self.get_selection())
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}: {self.title.text()}"
+
+
+if __name__ == "__main__":
+    import sys
+
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    widget = DeviceTagGroup(name="Tag group 1")
+    for item in [
+        HashableDevice(
+            **{
+                "name": f"test_device_{i}",
+                "deviceClass": "TestDeviceClass",
+                "readoutPriority": "baseline",
+                "enabled": True,
+            }
+        )
+        for i in range(5)
+    ]:
+        widget._add_item(item)
+    widget._update_num_included()
+    widget.show()
+    sys.exit(app.exec())

bec_widgets/widgets/control/device_manager/components/available_device_resources/device_tag_group_ui.py

@@ -0,0 +1,114 @@
+import math
+from functools import partial
+
+from bec_qthemes import material_icon
+from qtpy.QtCore import QMetaObject, QSize, Qt
+from qtpy.QtWidgets import (
+    QAbstractItemView,
+    QHBoxLayout,
+    QLabel,
+    QListView,
+    QListWidget,
+    QToolButton,
+    QVBoxLayout,
+)
+
+
+class AutoHeightListWidget(QListWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setViewMode(QListView.ViewMode.ListMode)
+        self.setResizeMode(QListView.ResizeMode.Adjust)
+        self.setWrapping(False)
+        self.setUniformItemSizes(True)
+        self.setMovement(QListView.Movement.Static)
+        self.setAcceptDrops(False)
+        self.setDragEnabled(True)
+        self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
+        self.setSpacing(5)
+
+        self.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
+        self.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        self.setMinimumHeight(self._calcSize().height())
+        self.setMaximumHeight(self._calcSize().height())
+
+    def sizeHint(self):
+        return self._calcSize()
+
+    def minimumSizeHint(self):
+        return self._calcSize()
+
+    def _calcSize(self):
+        if self.count() == 0:
+            return super().sizeHint()
+
+        grid = self.gridSize()
+        if not grid.isValid():
+            grid = QSize(100, 100)  # fallback
+
+        items_per_row = max(1, self.viewport().width() // grid.width())
+        rows = math.ceil(self.count() / items_per_row)
+
+        height = rows * grid.height() + 2 * self.frameWidth()
+        return QSize(self.viewport().width(), height)
+
+
+class Ui_DeviceTagGroup(object):
+    def setupUi(self, DeviceTagGroup):
+        if not DeviceTagGroup.objectName():
+            DeviceTagGroup.setObjectName("DeviceTagGroup")
+        DeviceTagGroup.setMinimumWidth(150)
+        self.verticalLayout = QVBoxLayout()
+        self.verticalLayout.setObjectName("verticalLayout")
+        DeviceTagGroup.set_layout(self.verticalLayout)
+
+        title_layout = DeviceTagGroup.get_title_layout()
+
+        self.n_included = QLabel(DeviceTagGroup, text="...")
+        self.n_included.setObjectName("n_included")
+        title_layout.addWidget(self.n_included)
+
+        self.delete_tag_button = QToolButton(DeviceTagGroup)
+        self.delete_tag_button.setObjectName("delete_tag_button")
+        title_layout.addWidget(self.delete_tag_button)
+
+        self.remove_from_composition_button = QToolButton(DeviceTagGroup)
+        self.remove_from_composition_button.setObjectName("remove_from_composition_button")
+        title_layout.addWidget(self.remove_from_composition_button)
+
+        self.add_to_composition_button = QToolButton(DeviceTagGroup)
+        self.add_to_composition_button.setObjectName("add_to_composition_button")
+        title_layout.addWidget(self.add_to_composition_button)
+
+        self.remove_all_button = QToolButton(DeviceTagGroup)
+        self.remove_all_button.setObjectName("remove_all_from_composition_button")
+        title_layout.addWidget(self.remove_all_button)
+
+        self.add_all_button = QToolButton(DeviceTagGroup)
+        self.add_all_button.setObjectName("add_all_to_composition_button")
+        title_layout.addWidget(self.add_all_button)
+
+        self.device_list = AutoHeightListWidget(DeviceTagGroup)
+        self.device_list.setObjectName("device_list")
+
+        self.verticalLayout.addWidget(self.device_list)
+
+        self.set_icons()
+
+        QMetaObject.connectSlotsByName(DeviceTagGroup)
+
+    def set_icons(self):
+        icon = partial(material_icon, size=(15, 15), convert_to_pixmap=False)
+        self.delete_tag_button.setIcon(icon("delete"))
+        self.delete_tag_button.setToolTip("Delete tag group")
+        self.remove_from_composition_button.setIcon(icon("remove"))
+        self.remove_from_composition_button.setToolTip("Remove selected from composition")
+        self.add_to_composition_button.setIcon(icon("add"))
+        self.add_to_composition_button.setToolTip("Add selected to composition")
+        self.remove_all_button.setIcon(icon("chips"))
+        self.remove_all_button.setToolTip("Remove all with this tag from composition")
+        self.add_all_button.setIcon(icon("add_box"))
+        self.add_all_button.setToolTip("Add all with this tag to composition")

bec_widgets/widgets/control/device_manager/components/device_table_view.py

@@ -23,20 +23,14 @@ FUZZY_SEARCH_THRESHOLD = 80
 class DictToolTipDelegate(QtWidgets.QStyledItemDelegate):
     """Delegate that shows all key-value pairs of a rows's data as a YAML-like tooltip."""
 
-    @staticmethod
-    def dict_to_str(d: dict) -> str:
-        """Convert a dictionary to a formatted string."""
-        return json.dumps(d, indent=4)
-
     def helpEvent(self, event, view, option, index):
         """Override to show tooltip when hovering."""
         if event.type() != QtCore.QEvent.ToolTip:
             return super().helpEvent(event, view, option, index)
         model: DeviceFilterProxyModel = index.model()
         model_index = model.mapToSource(index)
-        row_dict = model.sourceModel().row_data(model_index)
-        row_dict.pop("description", None)
-        QtWidgets.QToolTip.showText(event.globalPos(), self.dict_to_str(row_dict), view)
+        row_dict = model.sourceModel().get_row_data(model_index)
+        QtWidgets.QToolTip.showText(event.globalPos(), row_dict["description"], view)
         return True
 
 
@@ -47,10 +41,10 @@ class CenterCheckBoxDelegate(DictToolTipDelegate):
         super().__init__(parent)
         colors = get_accent_colors()
         self._icon_checked = material_icon(
-            "check_box", size=QtCore.QSize(16, 16), color=colors.default
+            "check_box", size=QtCore.QSize(16, 16), color=colors.default, filled=True
         )
         self._icon_unchecked = material_icon(
-            "check_box_outline_blank", size=QtCore.QSize(16, 16), color=colors.default
+            "check_box_outline_blank", size=QtCore.QSize(16, 16), color=colors.default, filled=True
         )
 
     def apply_theme(self, theme: str | None = None):
@@ -121,6 +115,9 @@ class DeviceTableModel(QtCore.QAbstractTableModel):
     Sort logic is implemented directly on the data of the table view.
     """
 
+    device_added = QtCore.Signal(dict)
+    devices_reset = QtCore.Signal(list)
+
     def __init__(self, device_config: list[dict] | None = None, parent=None):
         super().__init__(parent)
         self._device_config = device_config or []
@@ -128,10 +125,9 @@ class DeviceTableModel(QtCore.QAbstractTableModel):
             "name",
             "deviceClass",
             "readoutPriority",
+            "deviceTags",
             "enabled",
             "readOnly",
-            "deviceTags",
-            "description",
         ]
         self._checkable_columns_enabled = {"enabled": True, "readOnly": True}
 
@@ -150,7 +146,7 @@ class DeviceTableModel(QtCore.QAbstractTableModel):
             return self.headers[section]
         return None
 
-    def row_data(self, index: QtCore.QModelIndex) -> dict:
+    def get_row_data(self, index: QtCore.QModelIndex) -> dict:
         """Return the row data for the given index."""
         if not index.isValid():
             return {}
@@ -169,6 +165,8 @@ class DeviceTableModel(QtCore.QAbstractTableModel):
                 return bool(value)
             if key == "deviceTags":
                 return ", ".join(str(tag) for tag in value) if value else ""
+            if key == "deviceClass":
+                return str(value).split(".")[-1]
             return str(value) if value is not None else ""
         if role == QtCore.Qt.CheckStateRole and key in ("enabled", "readOnly"):
             return QtCore.Qt.Checked if value else QtCore.Qt.Unchecked
@@ -255,6 +253,7 @@ class DeviceTableModel(QtCore.QAbstractTableModel):
         self.beginResetModel()
         self._device_config = list(device_config)
         self.endResetModel()
+        self.devices_reset.emit(self._device_config)
 
     @SafeSlot(dict)
     def add_device(self, device: dict):
@@ -436,6 +435,8 @@ class DeviceFilterProxyModel(QtCore.QSortFilterProxyModel):
 class DeviceTableView(BECWidget, QtWidgets.QWidget):
     """Device Table View for the device manager."""
 
+    selected_device = QtCore.Signal(dict)
+
     RPC = False
     PLUGIN = False
     devices_removed = QtCore.Signal(list)
@@ -508,10 +509,9 @@ class DeviceTableView(BECWidget, QtWidgets.QWidget):
         self.table.setItemDelegateForColumn(0, self.tool_tip_delegate)  # name
         self.table.setItemDelegateForColumn(1, self.tool_tip_delegate)  # deviceClass
         self.table.setItemDelegateForColumn(2, self.tool_tip_delegate)  # readoutPriority
-        self.table.setItemDelegateForColumn(3, self.checkbox_delegate)  # enabled
-        self.table.setItemDelegateForColumn(4, self.checkbox_delegate)  # readOnly
-        self.table.setItemDelegateForColumn(5, self.wrap_delegate)  # deviceTags
-        self.table.setItemDelegateForColumn(6, self.wrap_delegate)  # description
+        self.table.setItemDelegateForColumn(3, self.wrap_delegate)  # deviceTags
+        self.table.setItemDelegateForColumn(4, self.checkbox_delegate)  # enabled
+        self.table.setItemDelegateForColumn(5, self.checkbox_delegate)  # readOnly
 
         # Column resize policies
         # TODO maybe we need here a flexible header options as deviceClass
@@ -520,13 +520,12 @@ class DeviceTableView(BECWidget, QtWidgets.QWidget):
         header.setSectionResizeMode(0, QtWidgets.QHeaderView.ResizeToContents)  # name
         header.setSectionResizeMode(1, QtWidgets.QHeaderView.ResizeToContents)  # deviceClass
         header.setSectionResizeMode(2, QtWidgets.QHeaderView.ResizeToContents)  # readoutPriority
-        header.setSectionResizeMode(3, QtWidgets.QHeaderView.Fixed)  # enabled
-        header.setSectionResizeMode(4, QtWidgets.QHeaderView.Fixed)  # readOnly
-        # TODO maybe better stretch...
-        header.setSectionResizeMode(5, QtWidgets.QHeaderView.ResizeToContents)  # deviceTags
-        header.setSectionResizeMode(6, QtWidgets.QHeaderView.Stretch)  # description
-        self.table.setColumnWidth(3, 82)
-        self.table.setColumnWidth(4, 82)
+        header.setSectionResizeMode(3, QtWidgets.QHeaderView.Stretch)  # deviceTags
+        header.setSectionResizeMode(4, QtWidgets.QHeaderView.Fixed)  # enabled
+        header.setSectionResizeMode(5, QtWidgets.QHeaderView.Fixed)  # readOnly
+
+        self.table.setColumnWidth(3, 70)
+        self.table.setColumnWidth(4, 70)
 
         # Ensure column widths stay fixed
         header.setMinimumSectionSize(70)
@@ -538,6 +537,8 @@ class DeviceTableView(BECWidget, QtWidgets.QWidget):
         # Selection behavior
         self.table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
         self.table.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        # Connect to selection model to get selection changes
+        self.table.selectionModel().selectionChanged.connect(self._on_selection_changed)
         self.table.horizontalHeader().setHighlightSections(False)
 
         # QtCore.QTimer.singleShot(0, lambda: header.sectionResized.emit(0, 0, 0))
@@ -566,6 +567,45 @@ class DeviceTableView(BECWidget, QtWidgets.QWidget):
             height = delegate.sizeHint(option, index).height()
             self.table.setRowHeight(row, height)
 
+    @SafeSlot(QtCore.QItemSelection, QtCore.QItemSelection)
+    def _on_selection_changed(
+        self, selected: QtCore.QItemSelection, deselected: QtCore.QItemSelection
+    ) -> None:
+        """
+        Handle selection changes in the device table.
+
+        Args:
+            selected (QtCore.QItemSelection): The selected items.
+            deselected (QtCore.QItemSelection): The deselected items.
+        """
+        # TODO also hook up logic if a config update is propagated from somewhere!
+        # selected_indexes = selected.indexes()
+        selected_indexes = self.table.selectionModel().selectedIndexes()
+        if not selected_indexes:
+            return
+
+        source_indexes = [self.proxy.mapToSource(idx) for idx in selected_indexes]
+        source_rows = {idx.row() for idx in source_indexes}
+        # Ignore if multiple are selected
+        if len(source_rows) > 1:
+            self.selected_device.emit({})
+            return
+
+        # Get the single row
+        (row,) = source_rows
+        source_index = self.model.index(row, 0)  # pick column 0 or whichever
+        device = self.model.get_row_data(source_index)
+        self.selected_device.emit(device)
+
+    @SafeSlot(QtCore.QModelIndex)
+    def _on_row_selected(self, index: QtCore.QModelIndex):
+        """Handle row selection in the device table."""
+        if not index.isValid():
+            return
+        source_index = self.proxy.mapToSource(index)
+        device = self.model.get_device_at_index(source_index)
+        self.selected_device.emit(device)
+
     ######################################
     ##### Ext.  Slot API #################
     ######################################

bec_widgets/widgets/control/device_manager/components/dm_config_view.py

@@ -0,0 +1,71 @@
+"""Module with a config view for the device manager."""
+
+from __future__ import annotations
+
+import yaml
+from qtpy import QtCore, QtWidgets
+
+from bec_widgets.utils.bec_widget import BECWidget
+from bec_widgets.utils.error_popups import SafeSlot
+from bec_widgets.widgets.editors.monaco.monaco_widget import MonacoWidget
+
+
+class DMConfigView(BECWidget, QtWidgets.QWidget):
+    def __init__(self, parent=None, client=None):
+        super().__init__(client=client, parent=parent)
+        self.stacked_layout = QtWidgets.QStackedLayout()
+        self.stacked_layout.setContentsMargins(0, 0, 0, 0)
+        self.stacked_layout.setSpacing(0)
+        self.setLayout(self.stacked_layout)
+
+        # Monaco widget
+        self.monaco_editor = MonacoWidget()
+        self._customize_monaco()
+        self.stacked_layout.addWidget(self.monaco_editor)
+
+        self._overlay_widget = QtWidgets.QLabel(text="Select single device to show config")
+        self._customize_overlay()
+        self.stacked_layout.addWidget(self._overlay_widget)
+        self.stacked_layout.setCurrentWidget(self._overlay_widget)
+
+    def _customize_monaco(self):
+
+        self.monaco_editor.set_language("yaml")
+        self.monaco_editor.set_vim_mode_enabled(False)
+        self.monaco_editor.set_minimap_enabled(False)
+        # self.monaco_editor.setFixedHeight(600)
+        self.monaco_editor.set_readonly(True)
+
+    def _customize_overlay(self):
+        self._overlay_widget.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
+        self._overlay_widget.setStyleSheet(
+            "background: qlineargradient(x1:0, y1:0, x2:0, y2:1,stop:0 #ffffff, stop:1 #e0e0e0);"
+        )
+        self._overlay_widget.setAutoFillBackground(True)
+        self._overlay_widget.setSizePolicy(
+            QtWidgets.QSizePolicy.Policy.Expanding, QtWidgets.QSizePolicy.Policy.Expanding
+        )
+
+    @SafeSlot(dict)
+    def on_select_config(self, device: dict):
+        """Handle selection of a device from the device table."""
+        if not device:
+            text = ""
+            self.stacked_layout.setCurrentWidget(self._overlay_widget)
+        else:
+            text = yaml.dump(device, default_flow_style=False)
+            self.stacked_layout.setCurrentWidget(self.monaco_editor)
+        self.monaco_editor.set_readonly(False)  # Enable editing
+        self.monaco_editor.set_text(text)
+        self.monaco_editor.set_readonly(True)  # Disable editing again
+
+
+if __name__ == "__main__":
+    import sys
+
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    config_view = DMConfigView()
+    config_view.show()
+    sys.exit(app.exec_())

bec_widgets/widgets/control/device_manager/components/dm_ophyd_test.py

@@ -0,0 +1,333 @@
+"""Module to run a static test for the current config and see if it is valid."""
+
+from __future__ import annotations
+
+import enum
+
+import bec_lib
+from bec_lib.logger import bec_logger
+from bec_qthemes import material_icon
+from qtpy import QtCore, QtGui, QtWidgets
+
+from bec_widgets.utils.bec_widget import BECWidget
+from bec_widgets.utils.colors import get_accent_colors
+from bec_widgets.utils.error_popups import SafeProperty, SafeSlot
+from bec_widgets.widgets.editors.web_console.web_console import WebConsole
+
+READY_TO_TEST = False
+
+logger = bec_logger.logger
+
+try:
+    import bec_server
+    import ophyd_devices
+
+    READY_TO_TEST = True
+except ImportError:
+    logger.warning(f"Optional dependencies not available: {ImportError}")
+    ophyd_devices = None
+    bec_server = None
+
+
+class ValidationStatus(int, enum.Enum):
+    """Validation status for device configurations."""
+
+    UNKNOWN = 0  # colors.default
+    ERROR = 1  # colors.emergency
+    VALID = 2  # colors.highlight
+    CANT_CONNECT = 3  # colors.warning
+    CONNECTED = 4  # colors.success
+
+
+class DeviceValidationListItem(QtWidgets.QWidget):
+    """Custom list item widget showing device name and validation status."""
+
+    status_changed = QtCore.Signal(int)  # Signal emitted when status changes -> ValidationStatus
+    # Signal emitted when device was validated with name, success, msg
+    device_validated = QtCore.Signal(str, str)
+
+    def __init__(
+        self,
+        device_config: dict[str, dict],
+        status: ValidationStatus,
+        status_icons: dict[ValidationStatus, QtGui.QPixmap],
+        validate_icon: QtGui.QPixmap,
+        parent=None,
+        static_device_test=None,
+    ):
+        super().__init__(parent)
+        if len(device_config.keys()) > 1:
+            logger.warning(
+                f"Multiple devices found for config: {list(device_config.keys())}, using first one"
+            )
+        self._static_device_test = static_device_test
+        self.device_name = list(device_config.keys())[0]
+        self.device_config = device_config
+        self.status: ValidationStatus = status
+        colors = get_accent_colors()
+        self._status_icon = status_icons
+        self._validate_icon = validate_icon
+        self._setup_ui()
+        self._update_status_indicator()
+
+    def _setup_ui(self):
+        """Setup the UI for the list item."""
+        layout = QtWidgets.QHBoxLayout(self)
+        layout.setContentsMargins(4, 4, 4, 4)
+
+        # Device name label
+        self.name_label = QtWidgets.QLabel(self.device_name)
+        self.name_label.setStyleSheet("font-weight: bold;")
+        layout.addWidget(self.name_label)
+
+        # Make sure status is on the right
+        layout.addStretch()
+        self.request_validation_button = QtWidgets.QPushButton("Validate")
+        self.request_validation_button.setIcon(self._validate_icon)
+        if self._static_device_test is None:
+            self.request_validation_button.setDisabled(True)
+        else:
+            self.request_validation_button.clicked.connect(self.on_request_validation)
+            # self.request_validation_button.setVisible(False) -> Hide it??
+        layout.addWidget(self.request_validation_button)
+        # Status indicator
+        self.status_indicator = QtWidgets.QLabel()
+        self._update_status_indicator()
+        layout.addWidget(self.status_indicator)
+
+    @SafeSlot()
+    def on_request_validation(self):
+        """Handle validate button click."""
+        if self._static_device_test is None:
+            logger.warning("Static device test not available.")
+            return
+        self._static_device_test.config = self.device_config
+        # TODO logic if connect is allowed
+        ret = self._static_device_test.run_with_list_output(connect=False)[0]
+        if ret.success:
+            self.set_status(ValidationStatus.VALID)
+        else:
+            self.set_status(ValidationStatus.ERROR)
+        self.device_validated.emit(ret.name, ret.message)
+
+    def _update_status_indicator(self):
+        """Update the status indicator color based on validation status."""
+        self.status_indicator.setPixmap(self._status_icon[self.status])
+
+    def set_status(self, status: ValidationStatus):
+        """Update the validation status."""
+        self.status = status
+        self._update_status_indicator()
+        self.status_changed.emit(self.status)
+
+    def get_status(self) -> ValidationStatus:
+        """Get the current validation status."""
+        return self.status
+
+
+class DeviceManagerOphydTest(BECWidget, QtWidgets.QWidget):
+
+    config_changed = QtCore.Signal(
+        dict, dict
+    )  # Signal emitted when the device config changed, new_config, old_config
+
+    def __init__(self, parent=None, client=None):
+        super().__init__(parent=parent, client=client)
+        if not READY_TO_TEST:
+            self._set_disabled()
+            static_device_test = None
+        else:
+            from ophyd_devices.utils.static_device_test import StaticDeviceTest
+
+            static_device_test = StaticDeviceTest(config_dict={})
+        self._static_device_test = static_device_test
+        self._device_config: dict[str, dict] = {}
+        self._main_layout = QtWidgets.QVBoxLayout(self)
+        self._main_layout.setContentsMargins(0, 0, 0, 0)
+        self._main_layout.setSpacing(4)
+
+        # Setup icons
+        colors = get_accent_colors()
+        self._validate_icon = material_icon(
+            icon_name="play_arrow", color=colors.default, filled=True
+        )
+        self._status_icons = {
+            ValidationStatus.UNKNOWN: material_icon(
+                icon_name="circle", size=(12, 12), color=colors.default, filled=True
+            ),
+            ValidationStatus.ERROR: material_icon(
+                icon_name="circle", size=(12, 12), color=colors.emergency, filled=True
+            ),
+            ValidationStatus.VALID: material_icon(
+                icon_name="circle", size=(12, 12), color=colors.highlight, filled=True
+            ),
+            ValidationStatus.CANT_CONNECT: material_icon(
+                icon_name="circle", size=(12, 12), color=colors.warning, filled=True
+            ),
+            ValidationStatus.CONNECTED: material_icon(
+                icon_name="circle", size=(12, 12), color=colors.success, filled=True
+            ),
+        }
+
+        self.setLayout(self._main_layout)
+
+        # splitter
+        self.splitter = QtWidgets.QSplitter(QtCore.Qt.Orientation.Vertical)
+        self._main_layout.addWidget(self.splitter)
+
+        # Add custom list
+        self.setup_device_validation_list()
+
+        # Setup text box
+        self.setup_text_box()
+
+        # Connect signals
+        self.config_changed.connect(self.on_config_updated)
+
+    @SafeSlot(list)
+    def on_device_config_update(self, config: list[dict]):
+        old_cfg = self._device_config
+        self._device_config = self._compile_device_config_list(config)
+        self.config_changed.emit(self._device_config, old_cfg)
+
+    def _compile_device_config_list(self, config: list[dict]) -> dict[str, dict]:
+        return {dev["name"]: {k: v for k, v in dev.items() if k != "name"} for dev in config}
+
+    @SafeSlot(dict, dict)
+    def on_config_updated(self, new_config: dict, old_config: dict):
+        """Handle config updates and refresh the validation list."""
+        # Find differences for potential re-validation
+        diffs = self._find_diffs(new_config, old_config)
+        # Check diff first
+        for diff in diffs:
+            if not diff:
+                continue
+            if len(diff) > 1:
+                logger.warning(f"Multiple devices found in diff: {diff}, using first one")
+            name = list(diff.keys())[0]
+            if name in self.client.device_manager.devices:
+                status = ValidationStatus.CONNECTED
+            else:
+                status = ValidationStatus.UNKNOWN
+            if self.get_device_status(diff) is None:
+                self.add_device(diff, status)
+            else:
+                self.update_device_status(diff, status)
+
+    def _find_diffs(self, new_config: dict, old_config: dict) -> list[dict]:
+        """
+        Return list of keys/paths where d1 and d2 differ. This goes recursively through the dictionary.
+
+        Args:
+            new_config: The first dictionary to compare.
+            old_config: The second dictionary to compare.
+        """
+        diffs = []
+        keys = set(new_config.keys()) | set(old_config.keys())
+        for k in keys:
+            if k not in old_config:  # New device
+                diffs.append({k: new_config[k]})
+                continue
+            if k not in new_config:  # Removed device
+                diffs.append({k: old_config[k]})
+                continue
+            # Compare device config if exists in both
+            v1, v2 = old_config[k], new_config[k]
+            if isinstance(v1, dict) and isinstance(v2, dict):
+                if self._find_diffs(v2, v1):  # recurse: something inside changed
+                    diffs.append({k: new_config[k]})
+            elif v1 != v2:
+                diffs.append({k: new_config[k]})
+        return diffs
+
+    def setup_device_validation_list(self):
+        """Setup the device validation list."""
+        # Create the custom validation list widget
+        self.validation_list = QtWidgets.QListWidget()
+        self.validation_list.setSelectionMode(QtWidgets.QAbstractItemView.SingleSelection)
+        self.splitter.addWidget(self.validation_list)
+        # self._main_layout.addWidget(self.validation_list)
+
+    def setup_text_box(self):
+        """Setup the text box for device validation messages."""
+        self.validation_text_box = QtWidgets.QTextEdit()
+        self.validation_text_box.setReadOnly(True)
+        self.splitter.addWidget(self.validation_text_box)
+        # self._main_layout.addWidget(self.validation_text_box)
+
+    @SafeSlot(str, str)
+    def on_device_validated(self, device_name: str, message: str):
+        """Handle device validation results."""
+        text = f"Device {device_name} was validated. Message: {message}"
+        self.validation_text_box.setText(text)
+
+    def _set_disabled(self) -> None:
+        """Disable the full view"""
+        self.setDisabled(True)
+
+    def add_device(
+        self, device_config: dict[str, dict], status: ValidationStatus = ValidationStatus.UNKNOWN
+    ):
+        """Add a device to the validation list."""
+        # Create the custom widget
+        item_widget = DeviceValidationListItem(
+            device_config=device_config,
+            status=status,
+            status_icons=self._status_icons,
+            validate_icon=self._validate_icon,
+            static_device_test=self._static_device_test,
+        )
+
+        # Create a list widget item
+        list_item = QtWidgets.QListWidgetItem()
+        list_item.setSizeHint(item_widget.sizeHint())
+
+        # Add item to list and set custom widget
+        self.validation_list.addItem(list_item)
+        self.validation_list.setItemWidget(list_item, item_widget)
+        item_widget.device_validated.connect(self.on_device_validated)
+
+    def update_device_status(self, device_config: dict[str, dict], status: ValidationStatus):
+        """Update the validation status for a specific device."""
+        for i in range(self.validation_list.count()):
+            item = self.validation_list.item(i)
+            widget = self.validation_list.itemWidget(item)
+            if (
+                isinstance(widget, DeviceValidationListItem)
+                and widget.device_config == device_config
+            ):
+                widget.set_status(status)
+                break
+
+    def clear_devices(self):
+        """Clear all devices from the list."""
+        self.validation_list.clear()
+
+    def get_device_status(self, device_config: dict[str, dict]) -> ValidationStatus | None:
+        """Get the validation status for a specific device."""
+        for i in range(self.validation_list.count()):
+            item = self.validation_list.item(i)
+            widget = self.validation_list.itemWidget(item)
+            if (
+                isinstance(widget, DeviceValidationListItem)
+                and widget.device_config == device_config
+            ):
+                return widget.get_status()
+        return None
+
+
+if __name__ == "__main__":
+    import sys
+
+    # pylint: disable=ungrouped-imports
+    from qtpy.QtWidgets import QApplication
+
+    app = QApplication(sys.argv)
+    device_manager_ophyd_test = DeviceManagerOphydTest()
+    cfg = device_manager_ophyd_test.client.device_manager._get_redis_device_config()
+    cfg.append({"name": "Wrong_Device", "type": "test"})
+    device_manager_ophyd_test.on_device_config_update(cfg)
+    device_manager_ophyd_test.show()
+    device_manager_ophyd_test.setWindowTitle("Device Manager Ophyd Test")
+    device_manager_ophyd_test.resize(800, 600)
+    sys.exit(app.exec_())

bec_widgets/widgets/services/device_browser/device_browser.py

@@ -11,19 +11,13 @@ from bec_lib.logger import bec_logger
 from bec_lib.messages import ConfigAction, ScanStatusMessage
 from bec_qthemes import material_icon
 from pyqtgraph import SignalProxy
-from qtpy.QtCore import QSize, QThreadPool, Signal
-from qtpy.QtWidgets import (
-    QFileDialog,
-    QListWidget,
-    QListWidgetItem,
-    QToolButton,
-    QVBoxLayout,
-    QWidget,
-)
+from qtpy.QtCore import QThreadPool, Signal
+from qtpy.QtWidgets import QFileDialog, QListWidget, QToolButton, QVBoxLayout, QWidget
 
 from bec_widgets.cli.rpc.rpc_register import RPCRegister
 from bec_widgets.utils.bec_widget import BECWidget
 from bec_widgets.utils.error_popups import SafeSlot
+from bec_widgets.utils.list_of_expandable_frames import ListOfExpandableFrames
 from bec_widgets.utils.ui_loader import UILoader
 from bec_widgets.widgets.services.device_browser.device_item import DeviceItem
 from bec_widgets.widgets.services.device_browser.device_item.device_config_dialog import (
@@ -59,7 +53,8 @@ class DeviceBrowser(BECWidget, QWidget):
         self._q_threadpool = QThreadPool()
         self.ui = None
         self.init_ui()
-        self.dev_list: QListWidget = self.ui.device_list
+        self.dev_list = ListOfExpandableFrames(self, DeviceItem)
+        self.ui.verticalLayout.addWidget(self.dev_list)
         self.dev_list.setVerticalScrollMode(QListWidget.ScrollMode.ScrollPerPixel)
         self.proxy_device_update = SignalProxy(
             self.ui.filter_input.textChanged, rateLimit=500, slot=self.update_device_list
@@ -132,25 +127,15 @@ class DeviceBrowser(BECWidget, QWidget):
 
     def init_device_list(self):
         self.dev_list.clear()
-        self._device_items: dict[str, QListWidgetItem] = {}
 
         with RPCRegister.delayed_broadcast():
             for device, device_obj in self.dev.items():
                 self._add_item_to_list(device, device_obj)
 
     def _add_item_to_list(self, device: str, device_obj):
-        def _updatesize(item: QListWidgetItem, device_item: DeviceItem):
-            device_item.adjustSize()
-            item.setSizeHint(QSize(device_item.width(), device_item.height()))
-            logger.debug(f"Adjusting {item} size to {device_item.width(), device_item.height()}")
 
-        def _remove_item(item: QListWidgetItem):
-            self.dev_list.takeItem(self.dev_list.row(item))
-            del self._device_items[device]
-            self.dev_list.sortItems()
-
-        item = QListWidgetItem(self.dev_list)
-        device_item = DeviceItem(
+        device_item = self.dev_list.add_item(
+            id=device,
             parent=self,
             device=device,
             devices=self.dev,
@@ -158,18 +143,11 @@ class DeviceBrowser(BECWidget, QWidget):
             config_helper=self._config_helper,
             q_threadpool=self._q_threadpool,
         )
-        device_item.expansion_state_changed.connect(partial(_updatesize, item, device_item))
-        device_item.imminent_deletion.connect(partial(_remove_item, item))
+
         self.editing_enabled.connect(device_item.set_editable)
         self.device_update.connect(device_item.config_update)
         tooltip = self.dev[device]._config.get("description", "")
         device_item.setToolTip(tooltip)
-        device_item.broadcast_size_hint.connect(item.setSizeHint)
-        item.setSizeHint(device_item.sizeHint())
-
-        self.dev_list.setItemWidget(item, device_item)
-        self.dev_list.addItem(item)
-        self._device_items[device] = item
 
     @SafeSlot(dict, dict)
     def scan_status_changed(self, scan_info: dict, _: dict):
@@ -200,18 +178,16 @@ class DeviceBrowser(BECWidget, QWidget):
         """
         filter_text = self.ui.filter_input.text()
         for device in self.dev:
-            if device not in self._device_items:
+            if device not in self.dev_list:
                 # it is possible the device has just been added to the config
                 self._add_item_to_list(device, self.dev[device])
         try:
             self.regex = re.compile(filter_text, re.IGNORECASE)
         except re.error:
             self.regex = None  # Invalid regex, disable filtering
-            for device in self.dev:
-                self._device_items[device].setHidden(False)
+            self.dev_list.unhide_all()
             return
-        for device in self.dev:
-            self._device_items[device].setHidden(not self.regex.search(device))
+        self.dev_list.set_hidden(filter(lambda d: not self.regex.search(d), self.dev.keys()))
 
     @SafeSlot()
     def _load_from_file(self):

bec_widgets/widgets/services/device_browser/device_browser.ui

@@ -1,93 +1,90 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
- <class>Form</class>
- <widget class="QWidget" name="Form">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>406</width>
-    <height>500</height>
-   </rect>
-  </property>
-  <property name="windowTitle">
-   <string>Form</string>
-  </property>
-  <layout class="QVBoxLayout" name="verticalLayout">
-   <item>
-    <widget class="QGroupBox" name="browser_group_box">
-     <property name="title">
-      <string>Device Browser</string>
-     </property>
-     <layout class="QVBoxLayout" name="verticalLayout_2">
-      <item>
-       <layout class="QHBoxLayout" name="filter_layout">
-        <item>
-         <widget class="QLineEdit" name="filter_input">
-          <property name="placeholderText">
-           <string>Filter</string>
-          </property>
-         </widget>
-        </item>
-        <item>
-         <widget class="QGroupBox" name="button_box">
-          <layout class="QHBoxLayout" name="horizontalLayout">
-           <property name="leftMargin">
-            <number>0</number>
-           </property>
-           <property name="topMargin">
-            <number>0</number>
-           </property>
-           <property name="rightMargin">
-            <number>0</number>
-           </property>
-           <property name="bottomMargin">
-            <number>0</number>
-           </property>
-           <item>
-            <widget class="QToolButton" name="add_button">
-             <property name="text">
-              <string>...</string>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QToolButton" name="save_button">
-             <property name="text">
-              <string>...</string>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QToolButton" name="import_button">
-             <property name="text">
-              <string>...</string>
-             </property>
-            </widget>
-           </item>
-          </layout>
-         </widget>
-        </item>
-       </layout>
-      </item>
-      <item>
-       <widget class="QLabel" name="scan_running_warning">
-        <property name="styleSheet">
-         <string notr="true"/>
+    <class>Form</class>
+    <widget class="QWidget" name="Form">
+        <property name="geometry">
+            <rect>
+                <x>0</x>
+                <y>0</y>
+                <width>406</width>
+                <height>500</height>
+            </rect>
         </property>
-        <property name="text">
-         <string>warning</string>
+        <property name="windowTitle">
+            <string>Form</string>
         </property>
-       </widget>
-      </item>
-      <item>
-       <widget class="QListWidget" name="device_list"/>
-      </item>
-     </layout>
+        <layout class="QVBoxLayout" name="verticalLayout">
+            <item>
+                <widget class="QGroupBox" name="browser_group_box">
+                    <property name="title">
+                        <string>Device Browser</string>
+                    </property>
+                    <layout class="QVBoxLayout" name="verticalLayout_2">
+                        <item>
+                            <layout class="QHBoxLayout" name="filter_layout">
+                                <item>
+                                    <widget class="QLineEdit" name="filter_input">
+                                        <property name="placeholderText">
+                                            <string>Filter</string>
+                                        </property>
+                                    </widget>
+                                </item>
+                                <item>
+                                    <widget class="QGroupBox" name="button_box">
+                                        <layout class="QHBoxLayout" name="horizontalLayout">
+                                            <property name="leftMargin">
+                                                <number>0</number>
+                                            </property>
+                                            <property name="topMargin">
+                                                <number>0</number>
+                                            </property>
+                                            <property name="rightMargin">
+                                                <number>0</number>
+                                            </property>
+                                            <property name="bottomMargin">
+                                                <number>0</number>
+                                            </property>
+                                            <item>
+                                                <widget class="QToolButton" name="add_button">
+                                                    <property name="text">
+                                                        <string>...</string>
+                                                    </property>
+                                                </widget>
+                                            </item>
+                                            <item>
+                                                <widget class="QToolButton" name="save_button">
+                                                    <property name="text">
+                                                        <string>...</string>
+                                                    </property>
+                                                </widget>
+                                            </item>
+                                            <item>
+                                                <widget class="QToolButton" name="import_button">
+                                                    <property name="text">
+                                                        <string>...</string>
+                                                    </property>
+                                                </widget>
+                                            </item>
+                                        </layout>
+                                    </widget>
+                                </item>
+                            </layout>
+                        </item>
+                        <item>
+                            <widget class="QLabel" name="scan_running_warning">
+                                <property name="styleSheet">
+                                    <string notr="true" />
+                                </property>
+                                <property name="text">
+                                    <string>warning</string>
+                                </property>
+                            </widget>
+                        </item>
+                    </layout>
+                </widget>
+            </item>
+        </layout>
     </widget>
-   </item>
-  </layout>
- </widget>
- <resources/>
- <connections/>
-</ui>
+    <resources />
+    <connections />
+</ui>

bec_widgets/widgets/services/device_browser/device_item/device_item.py

@@ -35,9 +35,6 @@ logger = bec_logger.logger
 
 
 class DeviceItem(ExpandableGroupFrame):
-    broadcast_size_hint = Signal(QSize)
-    imminent_deletion = Signal()
-
     RPC = False
 
     def __init__(

tests/unit_tests/test_available_device_resources.py

@@ -0,0 +1,78 @@
+from copy import copy
+
+import pytest
+
+from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_resource_backend import (
+    HashableDevice,
+    _HashableDeviceSet,
+)
+
+TEST_DEVICE_DICT = {
+    "name": "test_device",
+    "deviceClass": "TestDeviceClass",
+    "readoutPriority": "baseline",
+    "enabled": True,
+}
+
+
+def _test_device_dict(**kwargs):
+    new = copy(TEST_DEVICE_DICT)
+    new.update(kwargs)
+    return new
+
+
+@pytest.mark.parametrize(
+    "kwargs_1, kwargs_2, kwargs_3, kwargs_4, n",
+    [
+        ({}, {}, {}, {}, 1),
+        ({}, {}, {}, {"deviceConfig": {"a": 1}}, 1),
+        ({}, {}, {}, {"name": "test_device_2"}, 2),
+        ({}, {}, {"name": "test_device_2"}, {"deviceClass": "OtherDeviceClass"}, 3),
+    ],
+)
+def test_hashable_device_set_merges_equal(kwargs_1, kwargs_2, kwargs_3, kwargs_4, n):
+    item_1 = HashableDevice(**_test_device_dict(**kwargs_1))
+    item_2 = HashableDevice(**_test_device_dict(**kwargs_2))
+    item_3 = HashableDevice(**_test_device_dict(**kwargs_3))
+    item_4 = HashableDevice(**_test_device_dict(**kwargs_4))
+
+    test_set = _HashableDeviceSet((item_1, item_2, item_3, item_4))
+    assert len(test_set) == n
+
+
+def test_hashable_device_set_or_adds_sources():
+    item_1 = HashableDevice(**_test_device_dict(), source_files={"a", "b"})
+    item_2 = HashableDevice(**_test_device_dict(), source_files={"c", "d"})
+
+    set_1 = _HashableDeviceSet((item_1,))
+    set_2 = _HashableDeviceSet((item_2,))
+
+    combined = set_1 | set_2
+    assert len(combined) == 1
+    assert combined.pop().source_files == {"a", "b", "c", "d"}
+
+
+def test_hashable_device_set_or_adds_tags():
+    item_1 = HashableDevice(
+        **_test_device_dict(deviceTags={"tag1"}, deviceConfig={"param": "value"}),
+        source_files={"a", "b"},
+    )
+    item_2 = HashableDevice(
+        **_test_device_dict(deviceTags={"tag2"}, deviceConfig={"param": "value"}),
+        source_files={"c", "d"},
+    )
+    item_3 = HashableDevice(
+        **_test_device_dict(deviceTags={"tag3"}, deviceConfig={"param": "other_value"}),
+        source_files={"q"},
+    )
+
+    set_1 = _HashableDeviceSet((item_1,))
+    set_2 = _HashableDeviceSet((item_2,))
+    set_3 = _HashableDeviceSet((item_3,))
+
+    combined = sorted(set_1 | set_2 | set_3, key=lambda hd: hd.deviceConfig["param"])
+    assert len(combined) == 2
+    assert combined[0].source_files == {"q"}
+    assert combined[0].deviceTags == {"tag3"}
+    assert combined[1].source_files == {"a", "b", "c", "d"}
+    assert combined[1].deviceTags == {"tag1", "tag2"}

tests/unit_tests/test_device_browser.py

@@ -37,11 +37,11 @@ def device_browser(qtbot, mocked_client):
     yield dev_browser
 
 
-def test_device_browser_init_with_devices(device_browser):
+def test_device_browser_init_with_devices(device_browser: DeviceBrowser):
     """
     Test that the device browser is initialized with the correct number of devices.
     """
-    device_list = device_browser.ui.device_list
+    device_list = device_browser.dev_list
     assert device_list.count() == len(device_browser.dev)
 
 
@@ -58,11 +58,11 @@ def test_device_browser_filtering(
     expected = expected_num_visible if expected_num_visible >= 0 else len(device_browser.dev)
 
     def num_visible(item_dict):
-        return len(list(filter(lambda i: not i.isHidden(), item_dict.values())))
+        return len(list(filter(lambda i: not i.widget.isHidden(), item_dict.values())))
 
     device_browser.ui.filter_input.setText(search_term)
     qtbot.wait(100)
-    assert num_visible(device_browser._device_items) == expected
+    assert num_visible(device_browser.dev_list._item_dict) == expected
 
 
 def test_device_item_mouse_press_event(device_browser, qtbot):
@@ -70,8 +70,8 @@ def test_device_item_mouse_press_event(device_browser, qtbot):
     Test that the mousePressEvent is triggered correctly.
     """
     # Simulate a left mouse press event on the device item
-    device_item: QListWidgetItem = device_browser.ui.device_list.itemAt(0, 0)
-    widget: DeviceItem = device_browser.ui.device_list.itemWidget(device_item)
+    device_item: QListWidgetItem = device_browser.dev_list.itemAt(0, 0)
+    widget: DeviceItem = device_browser.dev_list.itemWidget(device_item)
     qtbot.mouseClick(widget._title, Qt.MouseButton.LeftButton)
 
 
@@ -88,8 +88,8 @@ def test_device_item_expansion(device_browser, qtbot):
     Test that the form is displayed when the item is expanded, and that the expansion is triggered
     by clicking on the expansion button, the title, or the device icon
     """
-    device_item: QListWidgetItem = device_browser.ui.device_list.itemAt(0, 0)
-    widget: DeviceItem = device_browser.ui.device_list.itemWidget(device_item)
+    device_item: QListWidgetItem = device_browser.dev_list.itemAt(0, 0)
+    widget: DeviceItem = device_browser.dev_list.itemWidget(device_item)
     qtbot.mouseClick(widget._expansion_button, Qt.MouseButton.LeftButton)
     tab_widget: QTabWidget = widget._contents.layout().itemAt(0).widget()
     qtbot.waitUntil(lambda: tab_widget.widget(0) is not None, timeout=100)
@@ -115,8 +115,8 @@ def test_device_item_mouse_press_and_move_events_creates_drag(device_browser, qt
     """
     Test that the mousePressEvent is triggered correctly and initiates a drag.
     """
-    device_item: QListWidgetItem = device_browser.ui.device_list.itemAt(0, 0)
-    widget: DeviceItem = device_browser.ui.device_list.itemWidget(device_item)
+    device_item: QListWidgetItem = device_browser.dev_list.itemAt(0, 0)
+    widget: DeviceItem = device_browser.dev_list.itemWidget(device_item)
     device_name = widget.device
     with mock.patch("qtpy.QtGui.QDrag.exec_") as mock_exec:
         with mock.patch("qtpy.QtGui.QDrag.setMimeData") as mock_set_mimedata:
@@ -133,19 +133,19 @@ def test_device_item_double_click_event(device_browser, qtbot):
     Test that the mouseDoubleClickEvent is triggered correctly.
     """
     # Simulate a left mouse press event on the device item
-    device_item: QListWidgetItem = device_browser.ui.device_list.itemAt(0, 0)
-    widget: DeviceItem = device_browser.ui.device_list.itemWidget(device_item)
+    device_item: QListWidgetItem = device_browser.dev_list.itemAt(0, 0)
+    widget: DeviceItem = device_browser.dev_list.itemWidget(device_item)
     qtbot.mouseDClick(widget, Qt.LeftButton)
 
 
 def test_device_deletion(device_browser, qtbot):
-    device_item: QListWidgetItem = device_browser.ui.device_list.itemAt(0, 0)
-    widget: DeviceItem = device_browser.ui.device_list.itemWidget(device_item)
+    device_item: QListWidgetItem = device_browser.dev_list.itemAt(0, 0)
+    widget: DeviceItem = device_browser.dev_list.itemWidget(device_item)
     widget._config_helper = mock.MagicMock()
 
-    assert widget.device in device_browser._device_items
+    assert widget.device in device_browser.dev_list._item_dict
     qtbot.mouseClick(widget.delete_button, Qt.LeftButton)
-    qtbot.waitUntil(lambda: widget.device not in device_browser._device_items, timeout=10000)
+    qtbot.waitUntil(lambda: widget.device not in device_browser.dev_list._item_dict, timeout=10000)
 
 
 def test_signal_display(mocked_client, qtbot):