treeitem.h

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#ifndef TREEITEM_H
#define TREEITEM_H

#include <QList>

class TreePath : public QList<qint64>
{
public:
    TreePath();
    TreePath(const TreePath &treePath);
    bool operator<(const TreePath &other) const;
};

#include <QMetaType>
Q_DECLARE_METATYPE(TreePath);

#include <QHash>
#include <QVariant>

class TreeItem
{
public:
    enum TreeItemRole {
        TreeItemNULL = -1,
        TreeItemId = Qt::UserRole + 500,
        TreeItemPath, //TreePath
        TreeItemPathString, //QString
        TreeItemName,
        TreeItemFullName, //QString: "project, location, installation, sensor_category, sensor, sensor_channel"
        TreeItemColumnName,
        TreeItemColumnId,
        TreeItemTimestampMax, //QDateTime
        TreeItemTimestampMin, //QDateTime
        TreeItemTimestampScope, //QString
        TreeItemDescription, //QString
        TreeItemSetupId //int
    };

    TreeItem(const QList<QVariant> &data, const QString &primaryKeyColumnName,
             const qint64 primaryKeyValue, TreeItem *parent = 0);
    ~TreeItem();

    void appendChild(TreeItem *child);
    TreeItem *child(int row) const;
    TreeItem *find(int treeId) const;
    int childCount() const;
    int columnCount() const;
    QVariant data(const int &column) const;
    QVariant data(const TreeItem::TreeItemRole &role) const;
    bool setData(const TreeItem::TreeItemRole &role, const QVariant &data);
    bool insertChild(int row, TreeItem *item);
    TreeItem *parent() const;
    bool removeChild(int row);
    int row() const;
    QVector<QVariant> getDataRecursively(const TreeItem::TreeItemRole &role,
                                         const TreeItem::TreeItemRole &matchRole = TreeItem::TreeItemNULL,
                                         const QVariant &matchValue = QVariant()) const;
    QString getPreviewSql();
    QString getQueryConstraints(const QString &suffix = QString()) const;
    const QString *getColumnName() const;
    bool operator==(const TreeItem &t) const;
    bool isRoot() const;

private:
    QString descriptionCalculated() const;
    QString getFullName(const QString &suffix = QString()) const;
    QString trimName(const QString name, const int maxSize);
    TreePath getTreePath() const;
    QString getTreePathString() const;
    void recursivePrependId(TreePath *path) const;
    void recursivePrependId(QList<QString> *path) const;
    QString getTimestampScope() const;
    QDateTime calculateTimestamp(const TreeItem::TreeItemRole &role) const;

private:
    TreeItem *parentItem;
    QList<TreeItem*> childItems;
    QList<QVariant> itemColumnData;
    mutable QHash<TreeItem::TreeItemRole, QVariant> itemRoleData;
    const QString columnName;
    const qint64 columnPKValue;
};

Q_DECLARE_METATYPE(TreeItem*);

#endif // TREEITEM_H