飘动的抽屉记住点击的物品

Question

我想记住在抽屉中单​​击的项目。

我在所有三个小部件（MyHomePage，FirstPage和SecondPage）中都使用相同的小部件作为抽屉（sameDrawerOnly），并使用变量itemClicked来跟踪在setState中轻敲的项目。但是条件格式无法正常工作。

这是代码

class MainScreen(QMainWindow, CROP_UI):
    def __init__(self):

        super().__init__()
        self.setupUi(self)

        # Graphic Screen set
        self.img = QGraphicsPixmapItem(QPixmap(BRING_IN_IMG_ROUTE))
        self.scene = QGraphicsScene()
        self.scene.addItem(self.img)
        self.graphicsView.setScene(self.scene)

        # Full Screen set size
        _WIDTH_ADD = 25
        _HEIGHT_ADD = 25
        self.setGeometry(0, 0, 640 + _WIDTH_ADD, 500 + _HEIGHT_ADD)

        self.graphicsView.viewport().installEventFilter(self)

        self.current_item = None
        self.start_pos = QPointF()
        self.end_pos = QPointF()

    def eventFilter(self, o, e):
        if self.graphicsView.viewport() is o:
            if e.type() == QEvent.MouseButtonPress:
                if e.buttons() & Qt.LeftButton:
                    print("press")
                    self.start_pos = self.end_pos = self.graphicsView.mapToScene(
                        e.pos()
                    )
                    pen = QPen(QColor(240, 240, 240))
                    pen.setWidth(3)
                    brush = QBrush(QColor(100, 255, 100, 100))
                    self.current_item = self.scene.addRect(QRectF(), pen, brush)
                    self._update_item()
            elif e.type() == QEvent.MouseMove:
                if e.buttons() & Qt.LeftButton and self.current_item is not None:
                    print("move")
                    self.end_pos = self.graphicsView.mapToScene(e.pos())
                    self._update_item()
            elif e.type() == QEvent.MouseButtonRelease:
                print("release")
                self.end_pos = self.graphicsView.mapToScene(e.pos())
                self._update_item()
                self.current_item = None

        return super().eventFilter(o, e)

    def _update_item(self):
        if self.current_item is not None:
            self.current_item.setRect(QRectF(self.start_pos, self.end_pos).normalized())