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/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <QAbstractItemModel>
#include <QModelIndex>
#include <QDebug>
#include <functional>
#include "query.h"
template<class T, class Ptr>
class ModelResult : public QAbstractItemModel
{
public:
enum Roles {
DomainObjectRole = Qt::UserRole + 1
};
ModelResult(const Akonadi2::Query &query, const QList<QByteArray> &propertyColumns);
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
QModelIndex index(int row, int column, const QModelIndex & parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex &index) const;
bool canFetchMore(const QModelIndex &parent) const;
void fetchMore(const QModelIndex &parent);
void add(const Ptr &value);
void modify(const Ptr &value);
void remove(const Ptr &value);
void setFetcher(const std::function<void(const Ptr &parent)> &fetcher);
private:
static qint64 parentId(const Ptr &value);
QModelIndex createIndexFromId(const qint64 &id) const;
void fetchEntities(const QModelIndex &parent);
//TODO we should be able to directly use T as index, with an appropriate hash function, and thus have a QMap<T, T> and QList<T>
QMap<qint64 /* entity id */, Ptr> mEntities;
QMap<qint64 /* parent entity id */, QList<qint64> /* child entity id*/> mTree;
QMap<qint64 /* child entity id */, qint64 /* parent entity id*/> mParents;
QMap<qint64 /* entity id */, bool> mEntityChildrenFetched;
QList<QByteArray> mPropertyColumns;
Akonadi2::Query mQuery;
std::function<void(const Ptr &)> loadEntities;
};
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