PyQt5：从拖放文件中获取文件名到listWidget

时间：2019-02-19 15:54:49

标签： python pyqt drag-and-drop pyqt5 qlistwidget

我有以下GUI，用户可以在其中选择多个文件并将其拖放到我的应用程序中的groupBox-Widget上。然后，我希望将文件名作为项目添加到我的应用程序的listWidget中。我定义的将文件名作为新项添加到我的listWidget的方法如下：

def fill_fileslist(self, files_list):
    self.listWidget_Files.addItems(files_list)

但是，即使有，我总是得到AttributeError: 'Ui_MainWindow' object has no attribute 'listWidget_Files'。 （??）谁能告诉我如何进行这项工作？

这是我的完整代码：

# -*- 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 Drop_groupBox(QtWidgets.QGroupBox):
    def __init__(self, parent):
        super().__init__(parent)

        self.setAcceptDrops(True)

    def dragEnterEvent(self, e):
        if e.mimeData().hasFormat('text/plain'):
            e.accept()
        else:
            e.ignore()

    def dropEvent(self, e):
        dragdrop = Ui_MainWindow()
        list_of_files = [x.strip() for x in e.mimeData().text().split('\n')]
        dragdrop.fill_fileslist(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)
        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)


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_())

编辑：以下完整的工作代码。问题是我没有使用Signals触发我想要的方法（准确地说是PyQt5风格的Signal）。

# -*- 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 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().hasFormat('text/plain'):
            e.accept()
        else:
            e.ignore()

    def dropEvent(self, e):
        list_of_files = [x.strip() for x in e.mimeData().text().split('\n')]
        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_())

感谢回答我评论中所链接问题的人！

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