我如何定制一个可以使用时间戳的QSlider？

from PyQt5.QtCore import Qt, QDateTime
from PyQt5.QtWidgets import QApplication, QMainWindow, QSlider, QLabel

class TimestampSlider(QSlider):
    def __init__(self, timestamp_range, parent=None):
        super().__init__(Qt.Horizontal, parent)
        self.timestamp_range = timestamp_range
        self.setMinimum(0)
        self.setMaximum(100)
        self.setValue(0)

    def timestampToSliderPosition(self, timestamp):
        start_timestamp = self.timestamp_range[0]
        end_timestamp = self.timestamp_range[1]
        position = (timestamp - start_timestamp) / (end_timestamp - start_timestamp) * 100
        return int(position)

    def sliderPositionToTimestamp(self, position):
        start_timestamp = self.timestamp_range[0]
        end_timestamp = self.timestamp_range[1]
        timestamp = start_timestamp + (end_timestamp - start_timestamp) * (position / 100)
        return int(timestamp)

    def mousePressEvent(self, event):
        position = event.pos().x()
        timestamp = self.sliderPositionToTimestamp(position)
        print("Clicked timestamp:", timestamp)
        super().mousePressEvent(event)

    def mouseMoveEvent(self, event):
        position = event.pos().x()
        timestamp = self.sliderPositionToTimestamp(position)
        print("Current timestamp:", timestamp)
        super().mouseMoveEvent(event)

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Timestamp Slider Example")
        self.slider = TimestampSlider((0, QDateTime.currentDateTime().toSecsSinceEpoch()), self)
        self.slider.setGeometry(50, 50, 200, 30)
        self.label = QLabel(self)
        self.label.setGeometry(50, 100, 200, 30)
        self.slider.valueChanged.connect(self.updateLabel)

    def updateLabel(self, value):
        timestamp = self.slider.sliderPositionToTimestamp(value)
        self.label.setText("Current timestamp: {}".format(timestamp))

if __name__ == "__main__":
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()