QTableView重写模型插入图标如何居中

各位大佬，重写模型并在某一列插入图标，但是图标不居中显示，具体代码如下：

复制代码

QVariant myModel::data(const QModelIndex &index, int role) const
{
    if(!index.isValid())
        return false;

    if(index.row() >= rowCount() || index.row() < 0 || index.column() >= columnCount() || index.column() < 0)
        return false;

    SSDSmartInfo ssdInfo = m_recordList.at(index.row());
    switch(role)
    {
    case Qt::DecorationRole:
    {
        if(index.column() == 1) //Status
        {
            QString strStatus = m_recordList[index.row()].strStatus;
            if(strStatus.toInt() == 1)
                return QVariant(QIcon(":/image/GooderCircle16.png"));
            else if(strStatus.toInt() == 2)
                return QVariant(QIcon(":/image/NormalCircle16.png"));
            else if(strStatus.toInt() == 3)
                return QVariant(QIcon(":/image/DangerCircle16.png"));
            else
                return QVariant(QIcon(""));
        }
    }
        break;
    case Qt::DisplayRole:
    {
        if(index.column() == 0) //ID
            return QVariant(ssdInfo.strIdx);

        if(index.column() == 2) //Description
            return QVariant(ssdInfo.strDescrition);

        if(index.column() == 3)
            return QVariant(ssdInfo.strCurrentValue);

        if(index.column() == 4)
            return QVariant(ssdInfo.strWorstValue);

        if(index.column() == 5)
            return QVariant(ssdInfo.strThreshold);

        if(index.column() == 6)
            return QVariant(ssdInfo.strRawValue);
    }
        break;
    case Qt::TextAlignmentRole:
    {
        return QVariant(Qt::AlignHCenter | Qt::AlignVCenter);
    }
    break;
    default:
    {
        return QVariant();
    }
        break;
    }
    return QVariant();
}

请问各位大佬，在插入图标后，如何设置图标在单元格里居中显示呢？欢迎各位大佬指点一二，小弟在此多谢了！