Drag&Drop from lineEdit to pushbutton in PyQt5 [duplicate] - python-3.x

Question

This question already has an answer here:
PyQt4 - Dragging and dropping files into QPushButton
(1 answer)
Closed 3 years ago.
I want to drag plain text from lineEdit widget to drop pushbutton label in PyQt5. Here is the code:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(873, 663)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.pushButton2= QtWidgets.QPushButton(self.centralwidget)
self.pushButton2.setGeometry(QtCore.QRect(280, 40, 93, 28))
self.pushButton2.setObjectName("pushButton2")
self.pushButton2.setAcceptDrops(True)
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(120, 200, 113, 22))
self.lineEdit.setObjectName("lineEdit")
MainWindow.setCentralWidget(self.centralwidget)
self.lineEdit.setDragEnabled(True)
self.retranslateUi(MainWindow)
class pushButton2(QtWidgets.QPushButton):
def __init__(self, title, parent):
super().__init__(title, parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
if event.mimeData().hasFormat('text/plain'):
event.accept()
else:
event.ignore()
def dropEvent(self, event):
self.setText(event.mimeData().text())
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton2.setText(_translate("MainWindow", "PushButton2"))
self.lineEdit.setText(_translate("MainWindow", "k"))
if __name__ == "__main__":
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
app.exec_()
I would expect to drag text from lineEdit to show as pushbutton label but it did not accepted , why ?

Answer 1

Try it:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
# class pushButton2(QtWidgets.QPushButton):
class PushButton(QtWidgets.QPushButton): # <---
def __init__(self, title, parent):
super().__init__(title, parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasFormat('text/plain'):
e.accept()
else:
e.ignore()
def dropEvent(self, e):
self.setText(e.mimeData().text())
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(873, 663)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
# self.pushButton2= QtWidgets.QPushButton(self.centralwidget)
self.pushButton2 = PushButton("PushButton2", self.centralwidget) # <---
self.pushButton2.setGeometry(QtCore.QRect(120, 140, 93, 28))
self.pushButton2.setObjectName("pushButton2")
# self.pushButton2.setAcceptDrops(True)
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(120, 200, 113, 22))
self.lineEdit.setObjectName("lineEdit")
MainWindow.setCentralWidget(self.centralwidget)
self.lineEdit.setDragEnabled(True)
self.retranslateUi(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton2.setText(_translate("MainWindow", "PushButton2"))
self.lineEdit.setText(_translate("MainWindow", "k"))
class ExampleApp(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
super().__init__()
self.setupUi(self)
if __name__ == "__main__":
if not QtWidgets.QApplication.instance():
app = QtWidgets.QApplication(sys.argv)
else:
app = QtWidgets.QApplication.instance()
MainWindow = ExampleApp()
MainWindow.show()
app.exec_()