如何在QListModel中添加小部件

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QListView
from PyQt5.QtCore import QAbstractListModel, Qt

# 自定义小部件类
class Widget(QWidget):
    def __init__(self, text):
        super().__init__()
        self.text = text

    def getText(self):
        return self.text

    def setText(self, text):
        self.text = text

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawText(event.rect(), Qt.AlignCenter, self.text)

# 自定义QAbstractListModel子类
class WidgetListModel(QAbstractListModel):
    def __init__(self, widgets=[]):
        super().__init__()
        self.widgets = widgets

    def rowCount(self, parent=None):
        return len(self.widgets)

    def data(self, index, role):
        if role == Qt.DisplayRole:
            return self.widgets[index.row()].getText()

    def flags(self, index):
        return Qt.ItemIsSelectable | Qt.ItemIsEditable | Qt.ItemIsEnabled

    def setData(self, index, value, role):
        if role == Qt.EditRole:
            self.widgets[index.row()].setText(value)
            self.dataChanged.emit(index, index)
            return True
        return False

    def addWidget(self, widget):
        self.beginInsertRows(self.index(len(self.widgets)), len(self.widgets), len(self.widgets))
        self.widgets.append(widget)
        self.endInsertRows()

# 创建应用程序
app = QApplication([])
window = QWidget()

# 创建小部件和模型
widget1 = Widget("Widget 1")
widget2 = Widget("Widget 2")
widgetListModel = WidgetListModel([widget1, widget2])

# 创建布局和列表视图
layout = QVBoxLayout(window)
listView = QListView()
layout.addWidget(listView)

# 设置列表视图的模型
listView.setModel(widgetListModel)

# 显示应用程序窗口
window.show()
app.exec()