如何使用QStringListModel在QListView中添加图标？

class IconDelegate : public QStyledItemDelegate
{
public:
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
    {
        if (option.state & QStyle::State_Selected)
        {
            painter->fillRect(option.rect, option.palette.highlight());
        }

        QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
        QString text = index.data(Qt::DisplayRole).toString();

        QRect iconRect = option.rect.adjusted(4, 4, -option.rect.width() / 2, -4);
        QRect textRect = option.rect.adjusted(option.rect.width() / 2, 0, -4, 0);

        if (!icon.isNull())
        {
            icon.paint(painter, iconRect);
        }

        painter->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, text);
    }
};

QStringListModel *model = new QStringListModel(this);
model->setStringList(QStringList() << "Item 1" << "Item 2" << "Item 3");

QListView *listView = new QListView(this);
listView->setModel(model);
listView->setItemDelegate(new IconDelegate);

QModelIndex index = model->index(row, column);
model->setData(index, QIcon(":/icons/icon.png"), Qt::DecorationRole);
model->setData(index, "Item 1", Qt::DisplayRole);