c++ - 为什么不调用继承自 QSortFilterProxyModel 的 filterAcceptsRow？

Question

有一个名为 customSortFilterProxyModel 的类继承自 QSortFilterProxyModel。一个 protected 函数 filterAcceptsRow 被覆盖。但是，根本不会调用 filterAcceptsRow。问题是什么？谢谢。customSortFilterProxyModel.h

class customSortFilterProxyModel: public QSortFilterProxyModel
        {
           Q_OBJECT

        public:
            customSortFilterProxyModel(QObject *parent);
            ~customSortFilterProxyModel();

        protected:
           virtual bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const override;   
        };

//customSortFilterProxyModel.cpp
customSortFilterProxyModel::customSortFilterProxyModel(QObject *parent)
: QSortFilterProxyModel(parent)
{
}
customSortFilterProxyModel::~customSortFilterProxyModel()
{

}
bool customSortFilterProxyModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
{
   return true;
}

使用这个代理模型测试代码

    QStringListModel *newModel = new QStringListModel;
    QStringList strList;
    strList << "1" << "2" << "3" << "4";
newModel->setStringList(strList);
    customSortFilterProxyModel   *m_customSortFilterProxyModel = new customSortFilterProxyModel(this);
       m_customSortFilterProxyModel->setSourceModel(newModel);

Answer 1

为排序列调用此函数

m_customSortFilterProxyModel->排序(0);