improve scan history device fixup

bec_widgets/widgets/services/scan_history_browser/components/scan_history_device_viewer.py

@@ -17,15 +17,16 @@ logger = bec_logger.logger
 # TODO check cleanup
 # Custom model
 class DeviceModel(QtCore.QAbstractListModel):
-    def __init__(self, devices=None):
-        super().__init__()
+
+    def __init__(self, parent=None, devices: dict[str, int] = None):
+        super().__init__(parent)
         if devices is None:
             devices = {}
-        self._devices = sorted(devices.items(), key=lambda x: -x[1])
+        self._devices: list[tuple] = sorted(devices.items(), key=lambda x: -x[1])
 
     # @SafeProperty(list) # TODO if SafeProperty, how to pass the type list[tuple[str, int]]?
     @property
-    def devices(self) -> list[tuple[str, int]]:
+    def devices(self):
         """Return the list of devices."""
         return self._devices
 
@@ -35,8 +36,8 @@ class DeviceModel(QtCore.QAbstractListModel):
         self._devices = sorted(value.items(), key=lambda x: -x[1])
         self.endResetModel()
 
-    def rowCount(self, **kwargs):  # parent=QtCore.QModelIndex()):
-        return len(self.devices)
+    def rowCount(self, parent=QtCore.QModelIndex()):
+        return len(self._devices)
 
     def data(self, index, role=QtCore.Qt.DisplayRole):
         if not index.isValid():
@@ -104,14 +105,14 @@ class ScanHistoryDeviceViewer(BECWidget, QtWidgets.QWidget):
         layout = QtWidgets.QHBoxLayout(self)
         self.setLayout(layout)
         # Init ComboBox
-        self.device_combo = QtWidgets.QComboBox(self)
+        self.device_combo = QtWidgets.QComboBox(parent=self)
         colors = get_accent_colors()
         self.request_plotting_button = QtWidgets.QPushButton(
             material_icon("play_arrow", size=(24, 24), color=colors.success),
             "Request Plotting",
             self,
         )
-        self.device_model = DeviceModel({})
+        self.device_model = DeviceModel(parent=self.device_combo)
         self.device_combo.setModel(self.device_model)
         layout.addWidget(self.device_combo)
         layout.addWidget(self.request_plotting_button)
@@ -166,6 +167,14 @@ if __name__ == "__main__":
     import sys
 
     app = QtWidgets.QApplication(sys.argv)
+
+    main_window = QtWidgets.QMainWindow()
+    central_widget = QtWidgets.QWidget()
+    main_window.setCentralWidget(central_widget)
+    layout = QtWidgets.QVBoxLayout(central_widget)
+    layout.setContentsMargins(0, 0, 0, 0)
+
     viewer = ScanHistoryDeviceViewer()
-    viewer.show()
-    sys.exit(app.exec_())
+    layout.addWidget(viewer)
+    main_window.show()
+    app.exec_()