PyQt5--ButtonDrag

 # -*- coding:utf-8 -*-
 '''
 Created on Sep 21, 2018

 @author: SaShuangYiBing

 Comment:
 '''
 import sys
 from PyQt5.QtCore import Qt,QMimeData
 from PyQt5.QtGui import QDrag
 from PyQt5.QtWidgets import QApplication,QWidget,QPushButton

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

     def mouseMoveEvent(self, e):
         if e.buttons() != Qt.RightButton:
             return

         mimedata = QMimeData()
         drag = QDrag(self)
         drag.setMimeData(mimedata)
         drag.setHotSpot(e.pos()-self.rect().topLeft())
         dropAction = drag.exec_(Qt.MoveAction)

     def mousePressEvent(self, e):
         QPushButton.mousePressEvent(self,e)
         if e.button() == Qt.LeftButton:
             print ('Press')

 class New_test(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()

     def initUI(self):
         self.setAcceptDrops(True)
         self.button = Button('Button',self)
         self.button.move(100,65)

         self.setGeometry(300,300,280,150)
         self.setWindowTitle('Click or Move')
         self.show()

     def dragEnterEvent(self, e):
         e.accept()

     def dropEvent(self, e):
         position = e.pos()
         self.button.move(position)

         e.setDropAction(Qt.MoveAction)
         e.accept()

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = New_test()
     sys.exit(app.exec_())

在Button上右键拖动时，按钮会跟随鼠标移动，如果是在Button左键时，会在控制台上打印出 "press"