feat: prepare available devices for dragging config

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

@@ -12,16 +12,17 @@ from bec_widgets.widgets.control.device_manager.components.available_device_reso
 from bec_widgets.widgets.control.device_manager.components.available_device_resources.device_resource_backend import (
     HashableDevice,
 )
+from bec_widgets.widgets.control.device_manager.components.constants import CONFIG_DATA_ROLE
 
 
 def _warning_string(spec: HashableDevice):
     name_warning = (
-        f"Device defined with multiple names! Please check:\n  {'\n  '.join(spec.names)}\n"
+        "Device defined with multiple names! Please check:\n  " + "\n  ".join(spec.names)
         if len(spec.names) > 1
         else ""
     )
     source_warning = (
-        f"Device found in multiple source files! Please check:\n  {'\n  '.join(spec._source_files)}"
+        "Device found in multiple source files! Please check:\n  " + "\n  ".join(spec._source_files)
         if len(spec._source_files) > 1
         else ""
     )
@@ -112,6 +113,7 @@ class AvailableDeviceGroup(ExpandableGroupFrame, Ui_AvailableDeviceGroup):
         super().__init__(parent=parent, **kwargs)
         self.setupUi(self)
         self.title_text = name  # type: ignore
+        self._mime_data = []
         self._devices: dict[str, _DeviceEntry] = {}
         for device in data:
             self._add_item(device)
@@ -123,12 +125,18 @@ class AvailableDeviceGroup(ExpandableGroupFrame, Ui_AvailableDeviceGroup):
 
     def _add_item(self, device: HashableDevice):
         item = QListWidgetItem(self.device_list)
+        device_dump = device.model_dump(exclude_defaults=True)
+        item.setData(CONFIG_DATA_ROLE, device_dump)
+        self._mime_data.append(device_dump)
         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 create_mime_data(self):
+        return self._mime_data
+
     def reset_devices_state(self):
         for dev in self._devices.values():
             dev.widget.set_included(False)

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

@@ -1,10 +1,28 @@
+import json
 from functools import partial
 
+from bec_lib.utils.json import ExtendedEncoder
 from bec_qthemes import material_icon
-from PySide6.QtWidgets import QFrame
-from qtpy.QtCore import QMetaObject
+from qtpy.QtCore import QByteArray, QMetaObject, QMimeData, Qt
 from qtpy.QtWidgets import QLabel, QListWidget, QToolButton, QVBoxLayout
 
+from bec_widgets.widgets.control.device_manager.components.constants import (
+    CONFIG_DATA_ROLE,
+    MIME_DEVICE_CONFIG,
+)
+
+
+class _DeviceListWiget(QListWidget):
+    def mimeTypes(self):
+        return [MIME_DEVICE_CONFIG]
+
+    def mimeData(self, items):
+        mime_obj = QMimeData()
+        data = [item.data(CONFIG_DATA_ROLE) for item in items]
+        byte_array = QByteArray(json.dumps(data, cls=ExtendedEncoder).encode("utf-8"))
+        mime_obj.setData(MIME_DEVICE_CONFIG, byte_array)
+        return mime_obj
+
 
 class Ui_AvailableDeviceGroup(object):
     def setupUi(self, AvailableDeviceGroup):
@@ -41,11 +59,13 @@ class Ui_AvailableDeviceGroup(object):
         self.add_all_button.setObjectName("add_all_to_composition_button")
         title_layout.addWidget(self.add_all_button)
 
-        self.device_list = QListWidget(AvailableDeviceGroup)
+        self.device_list = _DeviceListWiget(AvailableDeviceGroup)
         self.device_list.setSelectionMode(QListWidget.SelectionMode.ExtendedSelection)
         self.device_list.setObjectName("device_list")
         self.device_list.setFrameStyle(0)
-
+        self.device_list.setDragEnabled(True)
+        self.device_list.setAcceptDrops(False)
+        self.device_list.setDefaultDropAction(Qt.DropAction.CopyAction)
         self.verticalLayout.addWidget(self.device_list)
 
         self.set_icons()

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

@@ -15,6 +15,7 @@ from bec_widgets.widgets.control.device_manager.components.available_device_reso
     HashableDevice,
     get_backend,
 )
+from bec_widgets.widgets.control.device_manager.components.constants import CONFIG_DATA_ROLE
 
 
 class AvailableDeviceResources(BECWidget, QWidget, Ui_availableDeviceResources):
@@ -37,9 +38,10 @@ class AvailableDeviceResources(BECWidget, QWidget, Ui_availableDeviceResources):
         self.device_groups_list.sortItems()
 
     def _add_device_group(self, device_group: str, devices: set[HashableDevice]):
-        self.device_groups_list.add_item(
+        item, widget = self.device_groups_list.add_item(
             device_group, self.device_groups_list, device_group, devices, expanded=False
         )
+        item.setData(CONFIG_DATA_ROLE, widget.create_mime_data())
 
     def _reset_devices_state(self):
         for device_group in self.device_groups_list.widgets():

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

@@ -1,4 +1,10 @@
-from qtpy.QtCore import QMetaObject, Qt
+from __future__ import annotations
+
+import itertools
+import json
+
+from bec_lib.utils.json import ExtendedEncoder
+from qtpy.QtCore import QByteArray, QMetaObject, QMimeData, Qt
 from qtpy.QtWidgets import (
     QAbstractItemView,
     QComboBox,
@@ -14,6 +20,23 @@ from bec_widgets.utils.list_of_expandable_frames import ListOfExpandableFrames
 from bec_widgets.widgets.control.device_manager.components.available_device_resources.available_device_group import (
     AvailableDeviceGroup,
 )
+from bec_widgets.widgets.control.device_manager.components.constants import (
+    CONFIG_DATA_ROLE,
+    MIME_DEVICE_CONFIG,
+)
+
+
+class _ListOfDeviceGroups(ListOfExpandableFrames[AvailableDeviceGroup]):
+
+    def mimeTypes(self):
+        return [MIME_DEVICE_CONFIG]
+
+    def mimeData(self, items):
+        mime_obj = QMimeData()
+        data = list(itertools.chain.from_iterable(item.data(CONFIG_DATA_ROLE) for item in items))
+        byte_array = QByteArray(json.dumps(data, cls=ExtendedEncoder).encode("utf-8"))
+        mime_obj.setData(MIME_DEVICE_CONFIG, byte_array)
+        return mime_obj
 
 
 class Ui_availableDeviceResources(object):
@@ -32,7 +55,7 @@ class Ui_availableDeviceResources(object):
         self.grouping_selector = QComboBox()
         self.search_layout.addWidget(self.grouping_selector)
 
-        self.device_groups_list = ListOfExpandableFrames(
+        self.device_groups_list = _ListOfDeviceGroups(
             availableDeviceResources, AvailableDeviceGroup
         )
         self.device_groups_list.setObjectName("device_groups_list")
@@ -46,6 +69,7 @@ class Ui_availableDeviceResources(object):
         self.device_groups_list.setSelectionMode(QListWidget.SelectionMode.ExtendedSelection)
         self.device_groups_list.setDragEnabled(True)
         self.device_groups_list.setAcceptDrops(False)
+        self.device_groups_list.setDefaultDropAction(Qt.DropAction.CopyAction)
         self.device_groups_list.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
         availableDeviceResources.setMinimumWidth(250)
         availableDeviceResources.resize(250, availableDeviceResources.height())