mirror of
https://github.com/SELinuxProject/setools
synced 2025-04-01 22:58:12 +00:00
94 lines
2.9 KiB
Python
94 lines
2.9 KiB
Python
# Copyright 2015, Tresys Technology, LLC
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#
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# SPDX-License-Identifier: LGPL-2.1-only
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#
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#
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import logging
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import typing
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from PyQt5 import QtCore
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from . import modelroles
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from .typing import MetaclassFix
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T = typing.TypeVar("T")
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class SEToolsListModel(QtCore.QAbstractListModel, typing.Generic[T], metaclass=MetaclassFix):
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"""
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The purpose of this model is to have the
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objects return their string representations
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for Qt.DisplayRole and return the object
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for Qt.UserRole.
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Some Python list-like functions are provided
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for altering the model: append and remove
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"""
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def __init__(self, parent: QtCore.QObject | None = None) -> None:
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super().__init__(parent)
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self.log = logging.getLogger(self.__module__)
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self._item_list: typing.List[T] = []
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@property
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def item_list(self) -> typing.List[T]:
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"""The list of items in the model."""
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return self._item_list
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@item_list.setter
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def item_list(self, item_list: typing.List[T]) -> None:
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self.beginResetModel()
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self._item_list = item_list
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self.endResetModel()
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def rowCount(self, parent=QtCore.QModelIndex()) -> int:
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"""The number of rows in the model."""
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return len(self.item_list)
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def columnCount(self, parent=QtCore.QModelIndex()) -> int:
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"""The number of columns in the model."""
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return 1
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def append(self, item: T) -> None:
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"""Append the item to the list."""
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index = self.rowCount()
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self.beginInsertRows(QtCore.QModelIndex(), index, index)
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self.item_list.append(item)
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self.endInsertRows()
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def remove(self, item: T) -> None:
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"""Remove the first instance of the specified item from the list."""
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try:
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row = self.item_list.index(item)
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self.beginRemoveRows(QtCore.QModelIndex(), row, row)
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del self.item_list[row]
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self.endRemoveRows()
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except ValueError:
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self.log.debug(f"Attempted to remove item {item!r} but it is not in the list")
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def data(self, index: QtCore.QModelIndex, role: int = QtCore.Qt.ItemDataRole.DisplayRole):
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"""Get the data at the specified index for the specified role."""
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if not self.item_list or not index.isValid():
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return None
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row = index.row()
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item = self.item_list[row]
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match role:
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case QtCore.Qt.ItemDataRole.DisplayRole:
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return str(item)
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case modelroles.PolicyObjRole:
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return item
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case modelroles.ContextMenuRole:
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return ()
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case _:
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return None
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def flags(self, index: QtCore.QModelIndex = QtCore.QModelIndex()) -> QtCore.Qt.ItemFlags:
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"""Get the flags for the specified index."""
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return QtCore.Qt.ItemFlags() | \
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QtCore.Qt.ItemFlag.ItemIsEnabled | \
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QtCore.Qt.ItemFlag.ItemIsSelectable | \
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QtCore.Qt.ItemFlag.ItemNeverHasChildren
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