PySide: DragNDrop, copy widgets

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PySide import QtGui, QtCore


class Button(QtGui.QPushButton):

    def __init__(self, title, parent):
        super(Button, self).__init__(title, parent)

    def mouseMoveEvent(self, e):

        if e.buttons() == QtCore.Qt.LeftButton:
            self.setDown(False)
            mimeData = QtCore.QMimeData()

            drag = QtGui.QDrag(self)
            drag.setMimeData(mimeData)
            drag.setHotSpot(e.pos() - self.rect().topLeft())

            drag.start(QtCore.Qt.MoveAction)


    def mousePressEvent(self, e):

        QtGui.QPushButton.mousePressEvent(self, e)
        if e.button() == QtCore.Qt.LeftButton:
            print 'press'


class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):

        self.setAcceptDrops(True)

        self.btn = Button('Button', self)
        self.btn.move(100, 65)

        self.setGeometry(300, 300, 300, 150)
        self.setWindowTitle('Click or move')
        self.show()

    def dragEnterEvent(self, e):

        e.accept()

    def dropEvent(self, e):
        position = e.pos()
        newButton = Button(self.btn.text(), self)
        newButton.show()
        newButton.move(position)

        e.setDropAction(QtCore.Qt.MoveAction)
        e.accept()
        print 'Original button is down:', self.btn.isDown()
        print 'New button is down:', newButton.isDown()

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()