QStandardItemModel遍历查找搜索关键字

（1）findItems查找内容筛选项，只能查找显示的文字中是否包含该文字，但是

 QList<QStandardItem*> findItems(const QString &text,
                                    Qt::MatchFlags flags = Qt::MatchExactly,
                                    int column = 0) const;

（2）match可以匹配的范围更广一些，不仅可以匹配显示内容，还可以匹配DisplayRole ，还可以查找CheckStateRole ，也就是勾选上的选项，不过目前测试QTreeView只能搜索第一级节点，子节点勾选上的无法匹配；即使Qt::MatchFlags设置成递归MatchRecursive也无法遍历子节点

enum ItemDataRole {
        DisplayRole = 0,
        DecorationRole = 1,
        EditRole = 2,
        ToolTipRole = 3,
        StatusTipRole = 4,
        WhatsThisRole = 5,
        // Metadata
        FontRole = 6,
        TextAlignmentRole = 7,
        BackgroundColorRole = 8,
        BackgroundRole = 8,
        TextColorRole = 9,
        ForegroundRole = 9,
        CheckStateRole = 10,
        // Accessibility
        AccessibleTextRole = 11,
        AccessibleDescriptionRole = 12,
        // More general purpose
        SizeHintRole = 13,
        InitialSortOrderRole = 14,
        // Internal UiLib roles. Start worrying when public roles go that high.
        DisplayPropertyRole = 27,
        DecorationPropertyRole = 28,
        ToolTipPropertyRole = 29,
        StatusTipPropertyRole = 30,
        WhatsThisPropertyRole = 31,
        // Reserved
        UserRole = 0x0100
    };

 Q_INVOKABLE virtual QModelIndexList match(const QModelIndex &start, int role,
                                              const QVariant &value, int hits = 1,
                                              Qt::MatchFlags flags =
                                              Qt::MatchFlags(Qt::MatchStartsWith|Qt::MatchWrap)) const;

QModelIndexList listindex = m_model->match(m_model->index(0,0), Qt::CheckStateRole, Qt::Checked, 1, Qt::MatchWrap | Qt::MatchRecursive);
    listindex=    m_model->match(m_model->index(0, 0), Qt::DisplayRole, "1", 1, Qt::MatchContains | Qt::MatchRecursive);

（3）采用循环递归遍历的方式查找

int rootRowCount = m_model->rowCount();
    for (int i = 0; i < rootRowCount; i++)
    {
        QModelIndex rootIndex = m_model->index(i, 0);
        RecursiveFindCheckedVideo(rootIndex, mapSelectVideo);
    }

递归函数

void RecursiveFindCheckedVideo(QModelIndex& parent, QMap<QString, QVariantMap>& mapSelectFile)
{
    if (parent.isValid())
    {
        int rowCount = m_model->rowCount(parent);
        for (int i = 0; i < rowCount; ++i)
        {
            QModelIndex childIndex = m_model->index(i, 0, parent);
            QStandardItem* pItem = m_model->itemFromIndex(childIndex);
            if (pItem)
            {
                QVariantMap info = pItem->data().toMap();
                if (info.value("type") == "2")//视频文件
                {
                    mapSelectFile.insert(info.value("location").toString(), info);
                }
                else
                {
                    RecursiveFindCheckedVideo(childIndex, mapSelectFile); // 递归遍历子项
                }
            }

        }
    }
}