如何在 QListWidget 和 QMainWindow 之间拖动 QListWidgetItem？

如何解决如何在 QListWidget 和 QMainWindow 之间拖动 QListWidgetItem？

我查看了 QT 文档 (https://doc.qt.io/qt-5/model-view-programming.html#using-drag-and-drop-with-item-views)，但他们没有提到在 QListWidget 和 QMainWindow（或任何其他 QWidget）之间拖动项目。我希望用户能够在 QListWidget 之外自由拖动这些项目。我该怎么做？

这是我的代码：

import json
import os
import sys

from PyQt5 import QtGui
from PyQt5.Qt import Qpixmap
from PyQt5.QtCore import QPoint,Qt,QSize
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication,QMainWindow,QListWidget,QListWidgetItem

from MovableLabel import MovableLabel


class MainWindow(QMainWindow):

    def __init__(self,*args,obj=None,**kwargs):
        super(MainWindow,self).__init__(*args,**kwargs)

        def makeLabel():
            item = listWidget.currentItem()
            rect = listWidget.visualItemRect(item)
            itemPos = QPoint(rect.x(),rect.y())
            imageSize = item.icon().actualSize(QSize(100,200))

            listWidget.takeItem(listWidget.currentRow())

            label = MovableLabel(self,'Pogba.jpg')
            pixmap = item.icon().pixmap(imageSize)
            label.setpixmap(pixmap)
            label.setFixedSize(imageSize)
            label.move(itemPos)
            label.grabMouse()
            label.oldPos = itemPos
            label.clicked = False
            label.show()

        self.players = []
        pixmap = Qpixmap()

        listWidget = QListWidget(self)
        listWidget.setviewmode(QListWidget.IconMode)
        listWidget.setFixedSize(500,700)
        listWidget.setIconSize(QSize(100,200))
        listWidget.setDragDropMode(listWidget.InternalMove)
        listWidget.setFocusPolicy(Qt.NoFocus) #Why no work?

        listWidget.itemEntered.connect(makeLabel()) #Wrong way of doing this

        self.listWidget = listWidget

        '''json file contains positions of "outfield" players'''
        try:
            with open('players.txt','r') as file:
                data = json.load(file)
        except:
            data = []

        dir = 'Players/'

        for filename in os.listdir(dir):
            playersIndex = next((i for i,player in enumerate(data) if player['filename'] ==
                                 filename),None)
            playersIndex = None #Create button to reset @myself
            if playersIndex == None:
                item = QListWidgetItem(QIcon(dir + filename),filename,listWidget)
            else:
                pixmap = Qpixmap(dir + filename).scaledToHeight(100,Qt.SmoothTransformation)
                label = MovableLabel(self,filename)
                label.setpixmap(pixmap)
                label.setFixedSize(pixmap.width(),pixmap.height())
                label.setParent(self)
                label.move(data[playersIndex]['x'],data[playersIndex]['y'])
                self.players.append(label)
        self.setStyleSheet("background-color: black;")
        self.showMaximized()
        self.setAcceptDrops(True)

    def closeEvent(self,a0: QtGui.QCloseEvent) -> None:
        with open('players.txt','w') as outfile:
            json.dump([{'filename': player.filename,'x': player.x(),'y': player.y()} for player in self.players],outfile,indent= 4)



if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    app.exec_()

from PyQt5 import QtGui
from PyQt5.QtCore import QPoint
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QLabel,QListWidgetItem


class MovableLabel(QLabel):
    """WToolBar is a personalized toolbar."""

    homeAction = None

    oldPos = QPoint()

    def __init__(self,mainWindow: QMainWindow,filename: str):
        super().__init__(mainWindow)
        self.mainWindow = mainWindow
        self.filename = filename
        self.clicked = False

    def mousepressEvent(self,evt):
        """Select the toolbar."""
        self.oldPos = evt.globalPos()

    def mouseMoveEvent(self,evt):
        """Move the toolbar with mouse iteration."""
        if self.clicked:
            delta = QPoint(evt.globalPos() - self.oldPos)
            self.move(self.x() + delta.x(),self.y() + delta.y())
        else:
            self.clicked = True
        self.oldPos = evt.globalPos()

    def mouseReleaseEvent(self,ev: QtGui.QMouseEvent) -> None:
        self.releaseMouse()
        self.clicked = False
        listWidget: QListWidget = self.mainWindow.listWidget
        if ev.globalPos().x() < listWidget.width():
            pos = listWidget.mapFromGlobal(ev.globalPos())
            index = listWidget.indexAt(pos).row()
            icon = QIcon(self.pixmap())
            listWidget.insertItem(index,QListWidgetItem(icon,""))

            self.hide()
            if self in self.mainWindow.players:
                self.mainWindow.players.remove(self)
        if self not in self.mainWindow.players:
            self.mainWindow.players.append(self)