Imported existing sources

mymodel.h

@@ -0,0 +1,70 @@
+#ifndef MYMODEL_H
+#define MYMODEL_H
+
+#include <QObject>
+#include <QAbstractItemModel>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QList>
+
+class ItemData
+{
+public:
+    inline explicit ItemData(ItemData *parent, quint32 id, const QString &name = QString(), const QString &description = QString()) :
+        m_parent(parent),
+        m_id(id),
+        m_name(name),
+        m_description(description),
+        m_fetched(false)
+    {}
+
+    inline ~ItemData() { qDeleteAll(m_childrens); }
+
+    inline ItemData *parent() const { return m_parent; }
+    inline const QList<ItemData *> &childrens() const { return m_childrens; }
+    inline quint32 id() const { return m_id; }
+    inline const QString &name() const { return m_name; }
+    inline const QString &description() const { return m_description; }
+    inline bool fetched() const { return m_fetched; }
+
+    inline int row() { if(m_parent) return m_parent->childrens().indexOf(this); return 0; }
+    inline ItemData *child(int row) const { return m_childrens.at(row); }
+    inline int childCount() const { return m_childrens.count(); }
+
+    void fetch(QSqlQuery &query);
+
+private:
+    ItemData *m_parent;
+    QList<ItemData *> m_childrens;
+    quint32 m_id;
+    QString m_name;
+    QString m_description;
+    bool m_fetched;
+};
+
+class MyModel : public QAbstractItemModel
+{
+    Q_OBJECT
+
+public:
+    explicit MyModel(QSqlDatabase &db, QObject *parent = 0);
+
+    QModelIndex index(int row, int column, const QModelIndex &parent) const Q_DECL_OVERRIDE;
+    QModelIndex parent(const QModelIndex &child) const Q_DECL_OVERRIDE;
+    int rowCount(const QModelIndex &parent) const Q_DECL_OVERRIDE;
+    int columnCount(const QModelIndex &parent) const Q_DECL_OVERRIDE;
+    QVariant data(const QModelIndex &index, int role) const Q_DECL_OVERRIDE;
+    QVariant headerData(int section, Qt::Orientation orientation, int role) const Q_DECL_OVERRIDE;
+    bool hasChildren(const QModelIndex &parent) const Q_DECL_OVERRIDE;
+    void fetchMore(const QModelIndex &parent) Q_DECL_OVERRIDE;
+    bool canFetchMore(const QModelIndex &parent) const Q_DECL_OVERRIDE;
+
+private:
+    void loadChildrens(ItemData *itemData);
+
+    QSqlDatabase &m_db;
+    QSqlQuery m_query;
+    ItemData *m_root;
+};
+
+#endif // MYMODEL_H