fix: replace add'l md table w/ tree view

bec_widgets/widgets/editors/scan_metadata/additional_metadata_table.py

@@ -2,13 +2,14 @@ from __future__ import annotations
 
 from typing import Any
 
+from PySide6.QtWidgets import QSizePolicy
 from qtpy.QtCore import QAbstractTableModel, QModelIndex, Qt, Signal  # type: ignore
 from qtpy.QtWidgets import (
     QApplication,
     QHBoxLayout,
     QLabel,
     QPushButton,
-    QTableView,
+    QTreeView,
     QVBoxLayout,
     QWidget,
 )
@@ -105,9 +106,11 @@ class AdditionalMetadataTable(QWidget):
         self._layout = QHBoxLayout()
         self.setLayout(self._layout)
         self._table_model = AdditionalMetadataTableModel(initial_data)
-        self._table_view = QTableView()
+        self._table_view = QTreeView()
         self._table_view.setModel(self._table_model)
-        self._table_view.horizontalHeader().setStretchLastSection(True)
+        self._table_view.setSizePolicy(
+            QSizePolicy(QSizePolicy.Policy.Minimum, QSizePolicy.Policy.Minimum)
+        )
         self._layout.addWidget(self._table_view)
 
         self._buttons = QVBoxLayout()

tests/unit_tests/test_scan_metadata.py

 from decimal import Decimal
 from typing import Annotated
 
+from PySide6.QtCore import QItemSelectionModel, QModelIndex, QRect
 import pytest
 from bec_lib.metadata_schema import BasicScanMetadata
 from pydantic import Field
 from pydantic.types import Json
-from qtpy.QtCore import Qt
+from qtpy.QtCore import QPoint, Qt
 from qtpy.QtWidgets import QCheckBox, QDoubleSpinBox, QLineEdit, QSpinBox, QWidget
 
 from bec_widgets.widgets.editors.scan_metadata import AdditionalMetadataTableModel, ScanMetadata
@@ -189,7 +190,8 @@ def test_additional_metadata_table_add_row(table: AdditionalMetadataTable):
 
 def test_additional_metadata_table_delete_row(table: AdditionalMetadataTable):
     assert table._table_model.rowCount() == 3
-    table._table_view.selectRow(1)
+    m = table._table_view.selectionModel()
+    m.select(table._table_view.indexAt(QPoint(40, 30)), QItemSelectionModel.SelectionFlag.Select)
     table.delete_selected_rows()
     assert table._table_model.rowCount() == 2
     assert list(table.dump_dict().keys()) == ["key1", "key3"]