def __init__(self, parent=None, frame=QtWidgets.QFrame.Box):
            super(FIRSTUI.ScrollWidget, self).__init__()

            #   Container Widget
            widget = QtWidgets.QWidget()
            #   Layout of Container Widget
            self.layout = QtWidgets.QVBoxLayout(self)
            self.layout.setContentsMargins(0, 0, 0, 0)
            widget.setLayout(self.layout)

            #   Scroll Area Properties
            scroll = QtWidgets.QScrollArea()
            scroll.setFrameShape(frame)
            scroll.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
            scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
            scroll.setWidgetResizable(True)
            scroll.setWidget(widget)

            #   Scroll Area Layer add
            scroll_layout = QtWidgets.QVBoxLayout(self)
            scroll_layout.addWidget(scroll)
            scroll_layout.setContentsMargins(0, 0, 0, 0)
            self.setLayout(scroll_layout) 

def __init__(self, model, parent=None):
        super().__init__(parent)
        if not utils.is_mac:
            self.setStyle(QStyleFactory.create('Fusion'))
        stylesheet.set_register(self)
        self.setResizeMode(QListView.Adjust)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Fixed)
        self.setFocusPolicy(Qt.NoFocus)
        self.setFlow(QListView.LeftToRight)
        self.setSpacing(1)
        self._menu = None
        model.rowsInserted.connect(functools.partial(update_geometry, self))
        model.rowsRemoved.connect(functools.partial(update_geometry, self))
        model.dataChanged.connect(functools.partial(update_geometry, self))
        self.setModel(model)
        self.setWrapping(True)
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.customContextMenuRequested.connect(self.show_context_menu)
        self.clicked.connect(self.on_clicked) 

def __init__(self, running_model, **kwargs):
        super().__init__(**kwargs)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setFocusPolicy(Qt.NoFocus)
        self.setSelectionMode(self.NoSelection)

        self._running_cues = {}
        self._running_model = running_model
        self._running_model.item_added.connect(
            self._item_added, Connection.QtQueued)
        self._running_model.item_removed.connect(
            self._item_removed, Connection.QtQueued)
        self._running_model.model_reset.connect(
            self._model_reset, Connection.QtQueued)

        self.__dbmeter_visible = False
        self.__seek_visible = False
        self.__accurate_time = False 

def __init__(self, widget: QWidget, minHeight: int, theme: str, parent):
        super(StreamSelectorScrollArea, self).__init__(parent)
        if sys.platform in {'win32', 'darwin'}:
            self.setStyle(QStyleFactory.create('Fusion'))
        # noinspection PyUnresolvedReferences
        if parent.parent.parent.stylename == 'fusion' or sys.platform in {'win32', 'darwin'}:
            self.setStyleSheet('''
            QScrollArea {{
                background-color: transparent;
                margin-bottom: 10px;
                border: none;
                border-right: 1px solid {};
            }}'''.format('#4D5355' if theme == 'dark' else '#C0C2C3'))
        else:
            self.setStyleSheet('''
            QScrollArea {{
                background-color: transparent;
                margin-bottom: 10px;
                border: none;
            }}''')
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setFrameShape(QFrame.NoFrame)
        self.setMinimumHeight(minHeight)
        if widget is not None:
            self.setWidget(widget) 

def __init__(self, parent=None):
        super(VideoList, self).__init__(parent)
        self.parent = parent
        self.theme = self.parent.theme
        self._progressbars = []
        self.setMouseTracking(True)
        self.setDropIndicatorShown(True)
        self.setFixedWidth(190)
        self.setAttribute(Qt.WA_MacShowFocusRect, False)
        self.setContentsMargins(0, 0, 0, 0)
        self.setItemDelegate(VideoItem(self))
        self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding)
        self.setUniformItemSizes(True)
        self.setDragEnabled(True)
        self.setDragDropMode(QAbstractItemView.InternalMove)
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.setAlternatingRowColors(True)
        self.setVerticalScrollMode(QAbstractItemView.ScrollPerPixel)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setObjectName('cliplist')
        self.setStyleSheet('QListView::item { border: none; }')
        self.opacityEffect = OpacityEffect(0.3)
        self.opacityEffect.setEnabled(False)
        self.setGraphicsEffect(self.opacityEffect) 

def __init__(self, app, parent=None):
        super().__init__(parent=parent)
        self._app = app

        self.setWidgetResizable(True)
        self.setFrameShape(QFrame.NoFrame)

        self.t = TableContainer(app, self)
        self.setWidget(self.t)

        self.verticalScrollBar().valueChanged.connect(self.on_v_scrollbar_value_changed)
        # As far as I know, KDE and GNOME can't auto hide the scrollbar,
        # and they show an old-fation vertical scrollbar.
        # HELP: implement an auto-hide scrollbar for Linux
        if sys.platform.lower() != 'darwin':
            self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 

def __init__(self, colors, *args, **kwargs):
        super(CColorItems, self).__init__(*args, **kwargs)
        self.setItemDelegate(StyledItemDelegate(self))
        self.setEditTriggers(self.NoEditTriggers)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setFlow(self.LeftToRight)
        self.setWrapping(True)
        self.setResizeMode(self.Adjust)
        self.setSpacing(6)
        self.setCursor(Qt.PointingHandCursor)
        self.setFrameShape(self.NoFrame)
        self._model = QStandardItemModel(self)
        self.setModel(self._model)

        for color in colors:
            self.addColor(color) 

def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs)
        layout = QVBoxLayout(self)
        self.listWidget = QListWidget(self)
        self.listWidget.setSpacing(2)  # item直接的间隔
        # 隐藏横向滚动条
        self.listWidget.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # 让list 从左到右排列
        self.listWidget.setFlow(self.listWidget.LeftToRight)
        # 自动换行
        self.listWidget.setWrapping(True)
        self.listWidget.setResizeMode(self.listWidget.Adjust)

        self.buttonMsg = QPushButton('弹出提示框', self, clicked=self.showMessage)
        self.buttonDown = QPushButton('下载图片', self, clicked=self.doDownload)
        layout.addWidget(self.listWidget)
        layout.addWidget(self.buttonMsg)
        layout.addWidget(self.buttonDown)
        self.currentPage = 0
        self.initSession()  # 其实没必要，session主要用在需要登录的网站。缓存cookie用 

def __init__(self, *args, **kwargs):
        super(NotificationWindow, self).__init__(*args, **kwargs)
        self.setSpacing(20)
        self.setMinimumWidth(412)
        self.setMaximumWidth(412)
        QApplication.instance().setQuitOnLastWindowClosed(True)
        # 隐藏任务栏,无边框,置顶等
        self.setWindowFlags(self.windowFlags() | Qt.Tool |
                            Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint)
        # 去掉窗口边框
        self.setFrameShape(self.NoFrame)
        # 背景透明
        self.viewport().setAutoFillBackground(False)
        self.setAttribute(Qt.WA_TranslucentBackground, True)
        # 不显示滚动条
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # 获取屏幕高宽
        rect = QApplication.instance().desktop().availableGeometry(self)
        self.setMinimumHeight(rect.height())
        self.setMaximumHeight(rect.height())
        self.move(rect.width() - self.minimumWidth() - 18, 0) 

def __init__(self, main_wnd, message):
        QDialog.__init__(self, parent=main_wnd)
        self.setWindowTitle("Confirm Votes")
        scroll = QScrollArea()
        scroll.setMinimumHeight(280)
        scroll.setMaximumHeight(280)
        scroll.setMinimumWidth(500)
        scroll.setWidget(QLabel(message))
        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        scroll.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        lay = QVBoxLayout()
        lay.addWidget(scroll)
        row = QHBoxLayout()
        self.yes_btn = QPushButton("Yes")
        self.no_btn = QPushButton("No")
        self.yes_btn.clicked.connect(lambda: self.accept())
        self.no_btn.clicked.connect(lambda: self.reject())
        row.addWidget(self.yes_btn)
        row.addWidget(self.no_btn)
        lay.addLayout(row)
        self.setLayout(lay) 

def __init__(self, *args, **kwargs):
        super(TableView, self).__init__(*args, **kwargs)
        self.setAlternatingRowColors(True)

        self.horizontalHeader().setHighlightSections(False)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        self.verticalHeader().setVisible(False)
        self.verticalHeader().setHighlightSections(False)
        # self.verticalHeader().setDefaultSectionSize(24)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)

        self.setSelectionBehavior(QTableView.SelectRows)
        self.setSelectionMode(QTableView.SingleSelection)

        self.setEditTriggers(self.NoEditTriggers) 

def __init__(self, *,
                 cmd: 'command.Command',
                 win_id: int,
                 parent: QWidget = None) -> None:
        super().__init__(parent)
        self.pattern = None  # type: typing.Optional[str]
        self._win_id = win_id
        self._cmd = cmd
        self._active = False

        config.instance.changed.connect(self._on_config_changed)

        self._delegate = completiondelegate.CompletionItemDelegate(self)
        self.setItemDelegate(self._delegate)
        self.setStyle(QStyleFactory.create('Fusion'))
        stylesheet.set_register(self)
        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
        self.setHeaderHidden(True)
        self.setAlternatingRowColors(True)
        self.setIndentation(0)
        self.setItemsExpandable(False)
        self.setExpandsOnDoubleClick(False)
        self.setAnimated(False)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # WORKAROUND
        # This is a workaround for weird race conditions with invalid
        # item indexes leading to segfaults in Qt.
        #
        # Some background: http://bugs.quassel-irc.org/issues/663
        # The proposed fix there was later reverted because it didn't help.
        self.setUniformRowHeights(True)
        self.hide()
        # FIXME set elidemode
        # https://github.com/qutebrowser/qutebrowser/issues/118 

def setNonScroll(self):
        # Only scrollable for horizontal axis.
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.setMaximumSize(self._getQTableWidgetSize())
        self.setMinimumHeight(self._getQTableWidgetHeight()) 

def __init__(self, parent=None, title="', params=None):
        super().__init__(parent)

        self.params = params

        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        self.lbl_img_list = []
        self.pixmap_list = []

        self.H1_HEIGHT = 50
        self.H2_HEIGHT = 50
        self.SIDE_MARGIN = 5
        self.H1_FONT_SIZE = 18
        self.H2_FONT_SIZE = 18
        self.H3_FONT_SIZE = 16
        self.TEXT_FONT_SIZE = 14

        self.inner = QWidget(self)

        self.vbox = QVBoxLayout(self.inner)
        self.vbox.setSpacing(10)
        self.vbox.setContentsMargins(0, 0, 0, 0)

        topframe = QFrame()
        topframe.setStyleSheet("background-color: white')
        topframe.setFixedHeight(self.H1_HEIGHT)

        self.title = title
        lbl_h1 = QLabel(title, topframe)
        fnt = lbl_h1.font()
        fnt.setPointSize(self.H1_FONT_SIZE)
        lbl_h1.setFont(fnt)
        lbl_h1.setFixedHeight(self.H1_HEIGHT)
        lbl_h1.setMargin(self.SIDE_MARGIN)

        self.vbox.addWidget(topframe)

        self.inner.setLayout(self.vbox)

        self.setWidget(self.inner) 

def setup_coat_of_arms_view(self):
        size = QSize(90, 120)
        self.battleView.draw_coat_of_arms(self.graphicsView_coatOfArm.scene(), size)
        self.graphicsView_coatOfArm.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        size_policy = constants.default_size_policy(self.graphicsView_coatOfArm, QSizePolicy.Fixed, QSizePolicy.Fixed)
        self.graphicsView_coatOfArm.setSizePolicy(size_policy)
        self.graphicsView_coatOfArm.setMinimumSize(size)
        self.graphicsView_coatOfArm.setMaximumSize(size)
        self.graphicsView_coatOfArm.setStyleSheet("border-style: none;background: transparent")
        self.graphicsView_coatOfArm.setCacheMode(QGraphicsView.CacheBackground)
        self.gridLayout.addWidget(self.graphicsView_coatOfArm, 3, 1, 1, 1)

    # unit views 

def __init__(self, parent=None):
        super(Changelog, self).__init__(parent, Qt.Dialog | Qt.WindowCloseButtonHint)
        self.parent = parent
        self.setWindowTitle('{} changelog'.format(qApp.applicationName()))
        changelog = QFile(':/CHANGELOG')
        changelog.open(QFile.ReadOnly | QFile.Text)
        content = QTextStream(changelog).readAll()
        label = QLabel(content, self)
        label.setWordWrap(True)
        label.setTextFormat(Qt.PlainText)
        buttons = QDialogButtonBox(QDialogButtonBox.Close, self)
        buttons.rejected.connect(self.close)
        scrollarea = QScrollArea(self)
        scrollarea.setStyleSheet('QScrollArea { background:transparent; }')
        scrollarea.setWidgetResizable(True)
        scrollarea.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        scrollarea.setFrameShape(QScrollArea.NoFrame)
        scrollarea.setWidget(label)
        if sys.platform in {'win32', 'darwin'}:
            scrollarea.setStyle(QStyleFactory.create('Fusion'))
        # noinspection PyUnresolvedReferences
        if parent.parent.stylename == 'fusion' or sys.platform in {'win32', 'darwin'}:
            self.setStyleSheet('''
            QScrollArea {{
                background-color: transparent;
                margin-bottom: 10px;
                border: none;
                border-right: 1px solid {};
            }}'''.format('#4D5355' if parent.theme == 'dark' else '#C0C2C3'))
        else:
            self.setStyleSheet('''
            QScrollArea {{
                background-color: transparent;
                margin-bottom: 10px;
                border: none;
            }}''')
        layout = QVBoxLayout()
        layout.addWidget(scrollarea)
        layout.addWidget(buttons)
        self.setLayout(layout)
        self.setMinimumSize(self.sizeHint()) 

def __init__(self, service: VideoService, parent: QWidget, flags=Qt.WindowCloseButtonHint):
        super(SettingsDialog, self).__init__(parent.parentWidget(), flags)
        self.parent = parent
        self.service = service
        self.settings = self.parent.settings
        self.theme = self.parent.theme
        self.setObjectName('settingsdialog')
        if sys.platform in {'win32', 'darwin'}:
            self.setStyle(QStyleFactory.create('Fusion'))
        self.setWindowTitle('Settings')
        self.categories = QListWidget(self)
        self.categories.setResizeMode(QListView.Fixed)
        self.categories.setStyleSheet('QListView::item { text-decoration: none; }')
        self.categories.setAttribute(Qt.WA_MacShowFocusRect, False)
        self.categories.setObjectName('settingsmenu')
        self.categories.setUniformItemSizes(True)
        self.categories.setMouseTracking(True)
        self.categories.setViewMode(QListView.IconMode)
        self.categories.setIconSize(QSize(90, 60))
        self.categories.setMovement(QListView.Static)
        self.categories.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.pages = QStackedWidget(self)
        self.pages.addWidget(GeneralPage(self))
        self.pages.addWidget(VideoPage(self))
        self.pages.addWidget(ThemePage(self))
        self.pages.addWidget(ToolsPage(self))
        self.pages.addWidget(LogsPage(self))
        self.initCategories()
        horizontalLayout = QHBoxLayout()
        horizontalLayout.setSpacing(5)
        horizontalLayout.addWidget(self.categories)
        horizontalLayout.addWidget(self.pages, 1)
        buttons = QDialogButtonBox(QDialogButtonBox.Ok, self)
        buttons.accepted.connect(self.close)
        mainLayout = QVBoxLayout()
        mainLayout.addLayout(horizontalLayout)
        mainLayout.addWidget(buttons)
        self.setLayout(mainLayout) 

def __init__(self, app, parent=None):
        super().__init__(parent)
        self._app = app

        self.setWidgetResizable(True)
        self.setFrameShape(QFrame.NoFrame)

        self.p = _LeftPanel(app, self)
        self.setWidget(self.p)

        if sys.platform.lower() != 'darwin':
            self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 

def __init__(self):
        QGraphicsView.__init__(self)

        # Image is displayed as a QPixmap in a QGraphicsScene attached to this QGraphicsView.
        self.scene = QGraphicsScene()
        self.setScene(self.scene)

        # Store a local handle to the scene's current image pixmap.
        self._pixmapHandle = None

        # Image aspect ratio mode.
        # !!! ONLY applies to full image. Aspect ratio is always ignored when zooming.
        #   Qt.IgnoreAspectRatio: Scale image to fit viewport.
        #   Qt.KeepAspectRatio: Scale image to fit inside viewport, preserving aspect ratio.
        #   Qt.KeepAspectRatioByExpanding: Scale image to fill the viewport, preserving aspect ratio.
        self.aspectRatioMode = Qt.KeepAspectRatio

        # Scroll bar behaviour.
        #   Qt.ScrollBarAlwaysOff: Never shows a scroll bar.
        #   Qt.ScrollBarAlwaysOn: Always shows a scroll bar.
        #   Qt.ScrollBarAsNeeded: Shows a scroll bar only when zoomed.
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)

        # Stack of QRectF zoom boxes in scene coordinates.
        self.zoomStack = []

        # Flags for enabling/disabling mouse interaction.
        self.canZoom = True
        self.canPan = True 

def __init__(self, profile: dict, parent=None):
        """
        Data table:
        All data is in column 0.
        --
        0  - Visual name.
        32 - main data entry, name of parents, full data for children
        33 - 0 for parent, 1 for children, 3 for custom option.
        34 - Name of item that needs to be checked
        35 - index for children used for active option
        37 - List of QModelIndex to items that this depends on.

        """
        super().__init__(parent=parent)

        self.favorite = False

        self.setExpandsOnDoubleClick(False)
        # self.setHeaderHidden(True)
        self.setRootIsDecorated(False)
        self.setHeaderHidden(True)
        # self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.customContextMenuRequested.connect(self.contextMenu)

        # self.header().setSectionResizeMode(0,QHeaderView.ResizeToContents)
        # self.headerItem().setResizeMode(QHeaderView.ResizeToContents)

        # self.setItemWidget()
        if isinstance(profile, dict):
            self.load_profile(profile)
        else:
            raise TypeError(f'Expected dict, not type {type(profile)}')

        self.setSortingEnabled(True)
        self.sortByColumn(0, Qt.AscendingOrder)

        self.itemChanged.connect(self.make_exclusive)
        self.itemChanged.connect(self.check_dependency) 

def __init__(self):
        super(AMANDisplay, self).__init__()
        self.setGeometry(0, 0, 500, 600)
        self.setStyleSheet('background-color:#233370')
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.scene = QGraphicsScene(0, 0, 500, 600)

        # Timeline boundaries
        pen = QPen(QColor('white'))
        brush = QBrush(QColor('#233370'))
        self.scene.addLine(220, 0, 220, 600, pen)
        self.scene.addLine(280, 0, 280, 600, pen)
        self.scene.addLine(0, 30, 500, 30, pen)

        timelinebox = self.scene.addRect(220, 30, 60, 540, pen, brush)
        timelinebox.setFlag(timelinebox.ItemClipsChildrenToShape, True)

        # Timeline scale
        self.timeline  = QGraphicsItemGroup()
        self.timeline.setParentItem(timelinebox)
        self.timeticks = []
        for i in range(40):
            y = 15 * i
            w = 6
            if i % 5 == 0:
                w = 10
                self.timeticks.append(self.scene.addText('%02d' % (40 - i), QFont('Courier', 10)))
                self.timeticks[-1].setPos(240, y - 10)
                self.timeticks[-1].setDefaultTextColor(QColor('white'))
                self.timeline.addToGroup(self.timeticks[-1])
            self.timeline.addToGroup(self.scene.addLine(220, y, 220 + w, y, pen))
            self.timeline.addToGroup(self.scene.addLine(280 - w, y, 280, y, pen))

        self.lrwy = self.scene.addText('18R', QFont('Arial', 20, 50))
        self.lrwy.setPos(1, 1)
        self.lrwy.setDefaultTextColor(QColor('white'))
        # Finalize
        self.setScene(self.scene)
        self.show() 

def __init__(self, parent=None):
        super().__init__(parent)
        self.setMaximumHeight(21)
        self.setFocusPolicy(Qt.StrongFocus)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 

def __init__(self, parent=None, setup_list_cb=None, setup_list_cb_args=None,
                 double_click_to_accept=False, checkable=False):
        super(ListDialog, self).__init__(parent)

        self.right_click_handler = None

        layout = QVBoxLayout(self)
        self.list = DwarfListView()  # QListWidget()

        self.list.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        if double_click_to_accept:
            self.list.doubleClicked.connect(self.accept)

        if setup_list_cb is not None:
            setup_list_cb(self.list, setup_list_cb_args)

        layout.addWidget(self.list)
        if checkable:
            buttons = QHBoxLayout()
            select_all = QPushButton('select all')
            select_all.clicked.connect(self.select_all)
            buttons.addWidget(select_all)
            unselect_all = QPushButton('unselect all')
            unselect_all.clicked.connect(self.unselect_all)
            buttons.addWidget(unselect_all)
            ok = QPushButton('ok')
            ok.clicked.connect(self.accept)
            buttons.addWidget(ok)
            cancel = QPushButton('cancel')
            cancel.clicked.connect(self.close)
            buttons.addWidget(cancel)
            layout.addLayout(buttons) 

def __init__(self, callback, *__args):
        super().__init__(*__args)

        self.callback = callback
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.itemDoubleClicked.connect(self._callback) 

def initUi(self):
        # 初始化界面
        # 通过QListWidget的当前item变化来切换QStackedWidget中的序号
        self.listWidget.currentRowChanged.connect(
            self.stackedWidget.setCurrentIndex)
        # 去掉边框
        self.listWidget.setFrameShape(QListWidget.NoFrame)
        # 隐藏滚动条
        self.listWidget.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.listWidget.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # 这里就用一般的文本配合图标模式了(也可以直接用Icon模式,setViewMode)
        for i in range(20):
            item = QListWidgetItem(
                QIcon('Data/0%d.ico' % randint(1, 8)), str('选 项 %s' % i), self.listWidget)
            # 设置item的默认宽高(这里只有高度比较有用)
            item.setSizeHint(QSize(16777215, 60))
            # 文字居中
            item.setTextAlignment(Qt.AlignCenter)

        # 再模拟20个右侧的页面(就不和上面一起循环放了)
        for i in range(20):
            label = QLabel('我是页面 %d' % i, self)
            label.setAlignment(Qt.AlignCenter)
            # 设置label的背景颜色(这里随机)
            # 这里加了一个margin边距(方便区分QStackedWidget和QLabel的颜色)
            label.setStyleSheet('background: rgb(%d, %d, %d);margin: 50px;' % (
                randint(0, 255), randint(0, 255), randint(0, 255)))
            self.stackedWidget.addWidget(label)


# 美化样式表 

def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs)

        self.setAttribute(Qt.WA_TranslucentBackground, True)  # 设置父控件Widget背景透明
        self.setWindowFlags(Qt.FramelessWindowHint)  # 去掉边框
        palette = self.palette()
        palette.setBrush(QPalette.Base, Qt.transparent)  # 父控件背景透明
        self.setPalette(palette)

        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)

        #         QWebSettings.globalSettings().setAttribute(
        #             QWebSettings.DeveloperExtrasEnabled, True)# web开发者工具

        self.webView = QWebView(self)  # 网页控件
        layout.addWidget(self.webView)
        self.webView.setContextMenuPolicy(Qt.NoContextMenu)  # 去掉右键菜单
        self.mainFrame = self.webView.page().mainFrame()

        self.mainFrame.setScrollBarPolicy(
            Qt.Vertical, Qt.ScrollBarAlwaysOff)  # 去掉滑动条
        self.mainFrame.setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)

        # 最大化
        rect = app.desktop().availableGeometry()
        self.resize(rect.size())
        self.webView.resize(rect.size()) 

def __init__(self, *args, **kwargs):
        super(DragListWidget, self).__init__(*args, **kwargs)
        self.resize(400, 400)
        # 隐藏横向滚动条
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # 不能编辑
        self.setEditTriggers(self.NoEditTriggers)
        # 开启拖功能
        self.setDragEnabled(True)
        # 只能往外拖
        self.setDragDropMode(self.DragOnly)
        # 忽略放
        self.setDefaultDropAction(Qt.IgnoreAction)
        # ****重要的一句（作用是可以单选，多选。Ctrl、Shift多选，可从空白位置框选）****
        # ****不能用ExtendedSelection,因为它可以在选中item后继续框选会和拖拽冲突****
        self.setSelectionMode(self.ContiguousSelection)
        # 设置从左到右、自动换行、依次排列
        self.setFlow(self.LeftToRight)
        self.setWrapping(True)
        self.setResizeMode(self.Adjust)
        # item的间隔
        self.setSpacing(5)
        # 橡皮筋(用于框选效果)
        self._rubberPos = None
        self._rubberBand = QRubberBand(QRubberBand.Rectangle, self)

        self.initItems()

    # 实现拖拽的时候预览效果图
    # 这里演示拼接所有的item截图(也可以自己写算法实现堆叠效果) 

def scroll(self, item):
        if isinstance(item, list):
            item = item if len(item) > 0 else ""
        scroll = QScrollArea()
        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        scroll.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
        scroll.setMaximumHeight(50)
        scroll.setFrameShape(QFrame.NoFrame)
        scroll.setBackgroundRole(3)
        label = QLabel(str(item))
        label.setContentsMargins(5, 5, 5, 5)
        scroll.setWidget(label)
        return scroll 

def __init__(self, gateway, deduplicate=True, max_items=30):
        super(HistoryListWidget, self).__init__()
        self.gateway = gateway
        self.deduplicate = deduplicate
        self.max_items = max_items

        palette = self.palette()
        self.base_color = palette.base().color()
        self.highlighted_color = BlendedColor(
            self.base_color, palette.highlight().color(), 0.88
        )  # Was #E6F1F7
        self.highlighted = None

        self.action_icon = QIcon(resource("dots-horizontal-triple.png"))

        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.setFocusPolicy(Qt.NoFocus)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        # self.setSelectionMode(QAbstractItemView.ExtendedSelection)
        self.setSelectionMode(QAbstractItemView.NoSelection)
        # self.setStyleSheet("QListWidget::item:hover { background: #E6F1F7 }")
        self.setVerticalScrollMode(QAbstractItemView.ScrollPerPixel)

        self.sb = self.verticalScrollBar()

        self.sb.valueChanged.connect(self.update_visible_widgets)
        self.itemDoubleClicked.connect(self.on_double_click)
        self.customContextMenuRequested.connect(self.on_right_click)

        self.gateway.monitor.file_updated.connect(self.add_item)
        self.gateway.monitor.check_finished.connect(
            self.update_visible_widgets
        ) 

def __init__(self, parent):
        qw.QScrollArea.__init__(self, parent)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.horizontalScrollBar().setEnabled(False)

        # If removed, you will get unused space to the right and bottom.
        self.setWidgetResizable(True)

        # Only allow expanding, not shrinking.
        self.setSizePolicy(qsp(qsp.Minimum, qsp.Minimum))