Stakoverflow关于pyQt5中QTextEdit绑定鼠标事件的方法，其他控件绑定鼠标事件差不多

【以下为相关资源链接及对应代码示例：

https://stackoverflow.com/questions/53294597/how-to-define-a-mousepressevent-function-for-a-qtextedit-widget-without-subclass/53299802#53299802

from PyQt5 import QtCore, QtWidgets

3. class Widget(QtWidgets.QWidget):

 def __init__(self, parent=None):

 super(Widget, self).__init__(parent)

7. 复制代码

       self.edit = QtWidgets.QTextEdit()

 btn = QtWidgets.QPushButton()

 le = QtWidgets.QLineEdit()

11. 复制代码

        lay = QtWidgets.QVBoxLayout(self)

 for w in (self.edit, btn, le):

     lay.addWidget(