如何在QComboBox中截取鼠标信号

from PyQt5.QtWidgets import QApplication, QComboBox, QMessageBox

class CustomComboBox(QComboBox):
    def mousePressEvent(self, event):
        # 在这里处理鼠标按下事件
        QMessageBox.information(self, "提示", "鼠标信号已截取")
        # 可以在这里执行其他操作，比如展示菜单、显示下拉框等
        super().mousePressEvent(event)

if __name__ == '__main__':
    app = QApplication([])
    combo_box = CustomComboBox()
    combo_box.addItems(["选项1", "选项2", "选项3"])
    combo_box.show()
    app.exec_()