I have a groupBox in my PyQt5-Application which serves as a dropzone, where the user can upload files and the dropEvent prints a list of the filenames that were dragged into the dropzone and writes them to the listWidget. I have slightly changed the original code from here:
dropfiles.py
# -*- coding: utf-8 -*-
#
# Created by: PyQt5 UI code generator 5.6
#
# WARNING! All changes made in this file will be lost!
import os
from PyQt5 import QtCore, QtGui, QtWidgets
class Drop_groupBox(QtWidgets.QGroupBox):
dropped = QtCore.pyqtSignal(list)
def __init__(self, parent):
super().__init__(parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasUrls():
e.accept()
else:
e.ignore()
def dropEvent(self, e):
list_of_files = [url.toLocalFile() for url in e.mimeData().urls() if os.path.isfile(url.toLocalFile())]
self.dropped.emit(list_of_files)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(658, 449)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
MainWindow.setMinimumSize(QtCore.QSize(658, 449))
MainWindow.setMaximumSize(QtCore.QSize(658, 449))
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout_3 = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout_3.setObjectName("gridLayout_3")
self.gridLayout = QtWidgets.QGridLayout()
self.gridLayout.setObjectName("gridLayout")
self.label_Files = QtWidgets.QLabel(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.label_Files.sizePolicy().hasHeightForWidth())
self.label_Files.setSizePolicy(sizePolicy)
self.label_Files.setMinimumSize(QtCore.QSize(122, 20))
self.label_Files.setMaximumSize(QtCore.QSize(122, 20))
self.label_Files.setObjectName("label_Files")
self.gridLayout.addWidget(self.label_Files, 0, 0, 1, 1)
self.listWidget_Files = QtWidgets.QListWidget(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.listWidget_Files.sizePolicy().hasHeightForWidth())
self.listWidget_Files.setSizePolicy(sizePolicy)
self.listWidget_Files.setMinimumSize(QtCore.QSize(256, 341))
self.listWidget_Files.setMaximumSize(QtCore.QSize(256, 341))
self.listWidget_Files.setObjectName("listWidget_Files")
self.gridLayout.addWidget(self.listWidget_Files, 1, 0, 1, 1)
self.gridLayout_3.addLayout(self.gridLayout, 0, 0, 1, 1)
# self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
self.groupBox = Drop_groupBox(self.centralwidget)
self.groupBox.dropped.connect(self.fill_fileslist)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.groupBox.sizePolicy().hasHeightForWidth())
self.groupBox.setSizePolicy(sizePolicy)
self.groupBox.setMinimumSize(QtCore.QSize(300, 300))
self.groupBox.setMaximumSize(QtCore.QSize(400, 300))
self.groupBox.setTitle("")
self.groupBox.setObjectName("groupBox")
self.gridLayout_2 = QtWidgets.QGridLayout(self.groupBox)
self.gridLayout_2.setObjectName("gridLayout_2")
self.label = QtWidgets.QLabel(self.groupBox)
self.label.setObjectName("label")
self.gridLayout_2.addWidget(self.label, 0, 0, 1, 1)
self.gridLayout_3.addWidget(self.groupBox, 0, 1, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 658, 19))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "TestCase"))
self.label_Files.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt; font-weight:600;\">Selected Files</span></p></body></html>"))
self.label.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:16pt; font-weight:600;\">Drop Files Here!</span></p></body></html>"))
def fill_fileslist(self, files_list):
self.listWidget_Files.addItems(files_list)
print(files_list)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
This works perfectly fine, when I have all the code in one file. But now my problem is that I am designing a gui with the PyQt Designer and I want to separate the "gui"-file from the file with the programming logic (programming functions), so that when I change something in the gui and convert it to a python file (with pyuic), the functions not defined in the Designer won't be overwritten. So this is what I have tried:
mainwindow.py (the gui file)
# -*- coding: utf-8 -*-
#
# Created by: PyQt5 UI code generator 5.6
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(658, 449)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
MainWindow.setMinimumSize(QtCore.QSize(658, 449))
MainWindow.setMaximumSize(QtCore.QSize(658, 449))
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout_3 = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout_3.setObjectName("gridLayout_3")
self.gridLayout = QtWidgets.QGridLayout()
self.gridLayout.setObjectName("gridLayout")
self.label_Files = QtWidgets.QLabel(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.label_Files.sizePolicy().hasHeightForWidth())
self.label_Files.setSizePolicy(sizePolicy)
self.label_Files.setMinimumSize(QtCore.QSize(122, 20))
self.label_Files.setMaximumSize(QtCore.QSize(122, 20))
self.label_Files.setObjectName("label_Files")
self.gridLayout.addWidget(self.label_Files, 0, 0, 1, 1)
self.listWidget_Files = QtWidgets.QListWidget(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.listWidget_Files.sizePolicy().hasHeightForWidth())
self.listWidget_Files.setSizePolicy(sizePolicy)
self.listWidget_Files.setMinimumSize(QtCore.QSize(256, 341))
self.listWidget_Files.setMaximumSize(QtCore.QSize(256, 341))
self.listWidget_Files.setObjectName("listWidget_Files")
self.gridLayout.addWidget(self.listWidget_Files, 1, 0, 1, 1)
self.gridLayout_3.addLayout(self.gridLayout, 0, 0, 1, 1)
self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.groupBox.sizePolicy().hasHeightForWidth())
self.groupBox.setSizePolicy(sizePolicy)
self.groupBox.setMinimumSize(QtCore.QSize(300, 300))
self.groupBox.setMaximumSize(QtCore.QSize(400, 300))
self.groupBox.setTitle("")
self.groupBox.setObjectName("groupBox")
self.gridLayout_2 = QtWidgets.QGridLayout(self.groupBox)
self.gridLayout_2.setObjectName("gridLayout_2")
self.label = QtWidgets.QLabel(self.groupBox)
self.label.setObjectName("label")
self.gridLayout_2.addWidget(self.label, 0, 0, 1, 1)
self.gridLayout_3.addWidget(self.groupBox, 0, 1, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 658, 19))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "TestCase"))
self.label_Files.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt; font-weight:600;\">Selected Files</span></p></body></html>"))
self.label.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:16pt; font-weight:600;\">Drop Files Here!</span></p></body></html>"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
dropfiles_functions.py (the file with the programming logic)
# -*- coding: utf-8 -*-
import os
from PyQt5 import QtCore, QtWidgets
from dropfiles_gui import Ui_MainWindow
class Drop_groupBox(QtWidgets.QGroupBox):
dropped = QtCore.pyqtSignal(list)
def __init__(self, parent):
super().__init__(parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasUrls():
e.accept()
else:
e.ignore()
def dropEvent(self, e):
list_of_files = [url.toLocalFile() for url in e.mimeData().urls() if os.path.isfile(url.toLocalFile())]
self.dropped.emit(list_of_files)
class MConv(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.groupBox = Drop_groupBox(self.ui.centralwidget) # <-- why is this not working?
self.ui.groupBox.dropped.connect(self.fill_fileslist) # <-- why is this not working?
def fill_fileslist(self, files_list):
self.listWidget_Files.addItems(files_list)
print(files_list)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = MConv()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
I don't understand why the drop event is not passed to the groupBox. In the file 'dropfiles_functions.py' I changed the 'self.ui.groupBox' to the 'new Drop_groupBox', but its funcitonaltiy is not working. Can someone please explain to me why this is the case and what I'm doing wrong?
In order to get this to work, you need to promote your groupbox widget in QtDesigner from a QtWidgets.QGroupBox to a Drop_groupBox widget. You can check the official Qt documentation to find out how. If you succeed and convert the .ui file to a .py file, the line
self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
should have been replaced by
self.groupBox = Drop_groupBox(self.centralwidget)
and at the bottom of the .py file there should be an import statement similar to
from dropfiles_functions import Drop_groupBox
The next step is to correctly setup MConv. Since MConv inherits from both QMainWindow and Ui_MainWindow, you don't need to create a separate instance of Ui_MainWindow in QMainWindow.__init__. Instead you can refer to MConv.setupUi and MConv.groupBox directly, i.e.
class MConv(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
super().__init__(self)
self.setupUi(self) # <-- this will define self.groupBox = Drop_groupbox(...) amongst others
self.groupBox.dropped.connect(self.fill_fileslist)
def fill_fileslist(self, files_list):
self.listWidget_Files.addItems(files_list)
print(files_list)
Finally, in the if __name__ == "__main__" block you need to make sure you are using an instance of MConv rather than a standard QMainWindow, i.e.
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = MConv()
MainWindow.show()
sys.exit(app.exec_())