无法在PyQtGraph上获取mouseClickEvent触发器

import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore

class CustomPlotWidget(pg.PlotWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        
    def mouseClickEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            print("Left button clicked")
        elif event.button() == QtCore.Qt.RightButton:
            print("Right button clicked")
        elif event.button() == QtCore.Qt.MiddleButton:
            print("Middle button clicked")

# 创建应用程序和主窗口
app = QtGui.QApplication([])
win = QtGui.QMainWindow()

# 创建自定义的PlotWidget
plot = CustomPlotWidget()

# 将PlotWidget添加到主窗口
win.setCentralWidget(plot)

# 显示主窗口
win.show()

# 运行应用程序事件循环
app.exec_()