PyQt: 鼠标跟踪

import sys
from PyQt5.Qt import *


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.label_1 = None
        self.set_ui()

    # 重写mouseMoveEvent方法
    def mouseMoveEvent(self, a0) -> None:
        self.label_1.move(a0.x(), a0.y())
        self.label_1.setText(
            "窗口：" + str(a0.x()) + " " + str(a0.y()) +
            "\n全局：" + str(self.cursor().pos().x()) + " " + str(self.cursor().pos().y())
        )
        self.label_1.adjustSize()

    def set_ui(self):
        self.resize(500, 500)
        self.setWindowTitle("主窗口")
        # 自定义鼠标图片
        custom_cursor_pic = QPixmap("cursor.png").scaled(50, 50)
        custom_cursor = QCursor(custom_cursor_pic, 0, 0)
        self.setCursor(custom_cursor)
        # 鼠标初始位置
        self.cursor().setPos(0, 0)

        # 开启鼠标追踪
        self.setMouseTracking(True)

        self.label()
        self.show()

    def label(self):
        self.label_1 = CustomLabel(self)
        self.label_1.setStyleSheet("background-color:cyan;border:1px solid green")
        self.label_1.setText('鼠标初始位置：' + str(self.cursor().pos().x()) + ' ' + str(self.cursor().pos().y()))
        # 设置标签内容边距
        self.label_1.setContentsMargins(30, 0, 0, 0)
        # 开启鼠标追踪，让鼠标在标签上时也进行追踪
        self.label_1.setMouseTracking(True)


class CustomLabel(QLabel):
    # 重写标签mouseMoveEvent方法
    def mouseMoveEvent(self, ev) -> None:
        # super().mouseMoveEvent(ev)
        # 标记事件没有被处理，以便将事件传递给父对象
        ev.ignore()
        # ev.accept()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec_())