QListView not accepting drops in QMainWindow with Python PyQt4

Question

I'm not being able to make the QListWidget to accept dropped files.

I've used Qt Designer to make the QMainWindow and the QListWidget.

How can I solve this problem?

This is the my main.py

import sys
import os   
from PyQt4 import QtCore, QtGui
from PythonApp import Ui_MainWindow

class MainWindow(Ui_MainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()

        listView = Ui_MainWindow.listView
        listView.setAcceptDrops(True)
        listView.setIconSize(QtCore.QSize(72, 72))
        self.connect(listView, QtCore.SIGNAL("dropped"), self.pictureDropped)
        self.setCentralWidget(listView)

    def pictureDropped(self, l):
    listView = Ui_MainWindow.listView
        for url in l:
            if os.path.exists(url):
                print(url)                
                icon = QtGui.QIcon(url)
                pixmap = icon.pixmap(72, 72)                
                icon = QtGui.QIcon(pixmap)
                item = QtGui.QListWidgetItem(url, listView)
                item.setIcon(icon)        
                item.setStatusTip(url)             

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()
            links = []
            for url in event.mimeData().urls():
                links.append(str(url.toLocalFile()))
            self.emit(QtCore.SIGNAL("dropped"), links)
        else:
            event.ignore()

    def main():
        app = QtGui.QApplication(sys.argv)
        MainWindow = QtGui.QMainWindow()
        ui = Ui_MainWindow()
        ui.setupUi(MainWindow)

        MainWindow.show()
        sys.exit(app.exec_())

    if __name__ == '__main__':
        main()

This is the my PythonApp.pyfile:

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(800, 600)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setAcceptDrops(True)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.listView = QtGui.QListView(self.centralwidget)
        self.listView.setGeometry(QtCore.QRect(100, 60, 501, 331))
        self.listView.setAcceptDrops(True)
        self.listView.setDragDropMode(QtGui.QAbstractItemView.DragDrop)
        self.listView.setDefaultDropAction(QtCore.Qt.CopyAction)
        self.listView.setObjectName(_fromUtf8("listView"))
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22))
        self.menubar.setObjectName(_fromUtf8("menubar"))
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))

Answer 1

See how this example works so you can modify your code:

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

#---------
# IMPORT
#---------
import sys, os

from PyQt4 import QtGui, QtCore

#---------
# DEFINE
#---------
class MyListWidget(QtGui.QListWidget):
    dropped = QtCore.pyqtSignal(list)

    def __init__(self, type, parent=None):
        super(MyListWidget, self).__init__(parent)

        self.setAcceptDrops(True)

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()

        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()

        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()

            filePaths = [
                str(url.toLocalFile())
                for url in event.mimeData().urls()
            ]

            self.dropped.emit(filePaths)

        else:
            event.ignore()

class MyWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.listWidgetFiles = MyListWidget(self)
        self.listWidgetFiles.dropped.connect(self.on_listWidgetFiles_dropped)

        self.layoutVertical = QtGui.QVBoxLayout(self)
        self.layoutVertical.addWidget(self.listWidgetFiles)

    @QtCore.pyqtSlot(list)
    def on_listWidgetFiles_dropped(self, filePaths):
        for filePath in filePaths:
            if os.path.exists(filePath):
                QtGui.QListWidgetItem(filePath, self.listWidgetFiles)

#---------
# MAIN
#---------
if __name__ == "__main__":        
    app = QtGui.QApplication(sys.argv)
    app.setApplicationName('MyWindow')

    main = MyWindow()
    main.resize(333, 111)
    main.show()

    sys.exit(app.exec_())