PYQT5 拖放行在 TableWidget 中未按预期工作

Question

I am a beginner and I am working on a tool where users could rearrange row of files in a table widget with 2 columns.

Problem is when drag and dropping a row, the target gets deleted.

I found a solution in: Drag and drop rows within QTableWidget

But I could not seem to make it work on my code. Can someone point me where I should start? I couldn't understand where i should add the layout and the drag and drop event class.

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtGui import QIntValidator, QDropEvent
from PyQt5.QtWidgets import QFileDialog, QMessageBox, QTableWidget, QAbstractItemView, QTableWidgetItem, QWidget, QHBoxLayout, QApplication
from PyQt5.QtCore import QSettings, Qt
from pathlib import Path
import os


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(647, 564)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_4.setGeometry(QtCore.QRect(190, 130, 81, 31))
        self.pushButton_4.setStyleSheet("background-color: rgb(0, 255, 127);")
        self.pushButton_4.setObjectName("Browse")
        self.pushButton_4.clicked.connect(self.browseFiles)
        self.tableWidget_2 = QtWidgets.QTableWidget(self.centralwidget)
        self.tableWidget_2.setGeometry(QtCore.QRect(300, 20, 321, 391))
        self.tableWidget_2.setAutoFillBackground(True)
        self.tableWidget_2.setFrameShape(QtWidgets.QFrame.Box)
        self.tableWidget_2.setEditTriggers(QtWidgets.QAbstractItemView.AnyKeyPressed|QtWidgets.QAbstractItemView.DoubleClicked|QtWidgets.QAbstractItemView.EditKeyPressed|QtWidgets.QAbstractItemView.SelectedClicked)
        self.tableWidget_2.setDragEnabled(True)
        self.tableWidget_2.setAcceptDrops(True)
        self.tableWidget_2.viewport().setAcceptDrops(True)
        self.tableWidget_2.setDragDropOverwriteMode(False)
        self.tableWidget_2.setDropIndicatorShown(True)
        self.tableWidget_2.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
        self.tableWidget_2.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
        self.tableWidget_2.setDragDropMode(QtWidgets.QAbstractItemView.InternalMove)
        self.tableWidget_2.setAlternatingRowColors(True)
        self.tableWidget_2.setIconSize(QtCore.QSize(5, 5))
        self.tableWidget_2.setObjectName("tableWidget_2")
        self.tableWidget_2.setColumnCount(2)
        self.tableWidget_2.setRowCount(0)
        self.tableWidget_2.setHorizontalHeaderLabels(["Filename","Page Count"])
        self.tableWidget_2.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.pushButton_4.raise_()
        self.tableWidget_2.raise_()
        MainWindow.setCentralWidget(self.centralwidget)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton_4.setText(_translate("MainWindow", "Browse"))

    def browseFiles(self):
        self.pdfFiles = []
        lastPath = ""
        numRows = self.tableWidget_2.rowCount()
        options = QFileDialog.Options()
#        options |= QFileDialog.DontUseNativeDialog
        files, _ = QFileDialog.getOpenFileNames(MainWindow,"Select File(s)", "","Files (*.*)", options=options)
        for file in files:
            self.tableWidget_2.insertRow(numRows)
            self.tableWidget_2.setItem(numRows, 0, QtWidgets.QTableWidgetItem(file))
        if len(self.pdfFiles) > 0:
            lastPath = os.path.dirname(os.path.abspath(str(files)))
            self.lineEdit_3.setText(lastPath)
            self.disableButton()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)    
    MainWindow.show()
    MainWindow.setWindowTitle("ARCMAP")
    sys.exit(app.exec_())
    ```

Answer 1

Fixed it. Had to promote my table widget and import the TableWidgetDragRows class here: Drag and drop rows within QTableWidget .

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtGui import QIntValidator, QDropEvent
from PyQt5.QtWidgets import QFileDialog, QMessageBox, QTableWidget, QAbstractItemView, QTableWidgetItem, QWidget, QHBoxLayout, QApplication
from PyQt5.QtCore import QSettings, Qt
from pathlib import Path
import os

#import the tableWidgetDragRows in the link
from tablewidgetdragrows import TableWidgetDragRows


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(647, 564)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_4.setGeometry(QtCore.QRect(190, 130, 81, 31))
        self.pushButton_4.setStyleSheet("background-color: rgb(0, 255, 127);")
        self.pushButton_4.setObjectName("Browse")
        self.pushButton_4.clicked.connect(self.browseFiles)
#edit the tableWidget from default to the imported sub class
        self.tableWidget_2 = TableWidgetDragRows(self.centralwidget)
        self.tableWidget_2.setGeometry(QtCore.QRect(300, 20, 321, 391))
        self.tableWidget_2.setAutoFillBackground(True)
        self.tableWidget_2.setFrameShape(QtWidgets.QFrame.Box)
        self.tableWidget_2.setEditTriggers(QtWidgets.QAbstractItemView.AnyKeyPressed|QtWidgets.QAbstractItemView.DoubleClicked|QtWidgets.QAbstractItemView.EditKeyPressed|QtWidgets.QAbstractItemView.SelectedClicked)
#remove all drag and drop functions from your table widget so it would inherit from the imported subclass
#        self.tableWidget_2.setDragEnabled(True)
#        self.tableWidget_2.setAcceptDrops(True)
#        self.tableWidget_2.viewport().setAcceptDrops(True)
#        self.tableWidget_2.setDragDropOverwriteMode(False)
#        self.tableWidget_2.setDropIndicatorShown(True)
#        self.tableWidget_2.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
#        self.tableWidget_2.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
#        self.tableWidget_2.setDragDropMode(QtWidgets.QAbstractItemView.InternalMove)
        self.tableWidget_2.setAlternatingRowColors(True)
        self.tableWidget_2.setIconSize(QtCore.QSize(5, 5))
        self.tableWidget_2.setObjectName("tableWidget_2")
        self.tableWidget_2.setColumnCount(2)
        self.tableWidget_2.setRowCount(0)
        self.tableWidget_2.setHorizontalHeaderLabels(["Filename","Page Count"])
        self.tableWidget_2.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.pushButton_4.raise_()
        self.tableWidget_2.raise_()
        MainWindow.setCentralWidget(self.centralwidget)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton_4.setText(_translate("MainWindow", "Browse"))

    def browseFiles(self):
        self.pdfFiles = []
        lastPath = ""
        numRows = self.tableWidget_2.rowCount()
        options = QFileDialog.Options()
#        options |= QFileDialog.DontUseNativeDialog
        files, _ = QFileDialog.getOpenFileNames(MainWindow,"Select File(s)", "","Files (*.*)", options=options)
        for file in files:
            self.tableWidget_2.insertRow(numRows)
            self.tableWidget_2.setItem(numRows, 0, QtWidgets.QTableWidgetItem(file))
        if len(self.pdfFiles) > 0:
            lastPath = os.path.dirname(os.path.abspath(str(files)))
            self.lineEdit_3.setText(lastPath)
            self.disableButton()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)    
    MainWindow.show()
    MainWindow.setWindowTitle("ARCMAP")
    sys.exit(app.exec_())
    ```