Qt如何禁用QComboBox的鼠标滚动？

from PyQt5.QtCore import Qt, QEvent
from PyQt5.QtWidgets import QComboBox

class CustomComboBox(QComboBox):
    def __init__(self, parent=None):
        super(CustomComboBox, self).__init__(parent)

    def wheelEvent(self, event):
        event.ignore()

# 使用示例
combo_box = CustomComboBox()
combo_box.addItems(["Item 1", "Item 2", "Item 3"])
combo_box.show()