[xxyzz]

I tested 5.99.11 on Arch Linux, here are the problems I found:

• Placeholder texts are black on Gnome dark theme, example: Preferences->Searching->Grouped searches->Names and Values
• `QAbstractScrollArea` is not included in `pyqt6_compat.py`, it has `SizeAdjustPolicy` enum.
• Checkbox(`Qt.ItemDataRole.CheckStateRole`) in `QTableView` can be unchecked from checked state but can't be changed to checked state. It works on PyQt5, maybe it's a Qt6 bug?. Code:
  
  

  class LemmasTableModle(QAbstractTableModel):
      def __init__(self):
          super().__init__()
          ...
  
      def data(self, index, role=Qt.ItemDataRole.DisplayRole):
          if not index.isValid():
              return None
          column = index.column()
          value = self.lemmas[index.row()][column]
          if role == Qt.ItemDataRole.CheckStateRole and column == 0:
              return Qt.CheckState.Checked if value else Qt.CheckState.Unchecked
          elif role == Qt.ItemDataRole.DisplayRole and column == 3:
              return self.pos_types[value]
          elif role == Qt.ItemDataRole.DisplayRole or role == Qt.ItemDataRole.EditRole:
              return value
          elif role == Qt.ItemDataRole.ToolTipRole and column == 4:
              return value
  
      def flags(self, index):
          if not index.isValid():
              return Qt.ItemFlag.ItemIsEnabled
          flag = QAbstractTableModel.flags(self, index)
          column = index.column()
          if column == 0:
              flag |= Qt.ItemFlag.ItemIsUserCheckable
          elif column == 5:
              flag |= Qt.ItemFlag.ItemIsEditable
          return flag
  
      def setData(self, index, value, role):
          if not index.isValid():
              return False
          column = index.column()
          if role == Qt.ItemDataRole.CheckStateRole and column == 0:
              self.lemmas[index.row()][0] = value == Qt.CheckState.Checked
              self.dataChanged.emit(index, index, [role])
              return True
          elif role == Qt.ItemDataRole.EditRole and column == 5:
              self.lemmas[index.row()][5] = int(value)
              self.dataChanged.emit(index, index, [role])
              return True
          return False

  Full code: https://github.com/xxyzz/WordDumb/bl...stom_lemmas.py