/*
 * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
 *
 * This file is part of the KGantt library.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#ifndef KGANTTSUMMARYHANDLINGPROXYMODEL_H
#define KGANTTSUMMARYHANDLINGPROXYMODEL_H

#include "kganttforwardingproxymodel.h"

namespace KGantt
{

/*!\class KGantt::SummaryHandlingProxyModel
 * \brief Proxy model that supports summary gantt items.
 *
 * This proxy model provides the functionality of summary items.
 * A summary item is an item with type KGantt::TypeSummary and
 * zero or more children in the model that it summarizes.
 * GraphicsView itself does not dictate any policy for summary items,
 * instead the logic for making the summary items start and end points
 * span it's children is provided by this proxy.
 *
 * The start and end times of a summary is the min/max of the
 * start/end times of it's children.
 *
 * \see GraphicsView::setModel
 */
class KGANTT_EXPORT SummaryHandlingProxyModel : public ForwardingProxyModel
{
    Q_OBJECT
    KGANTT_DECLARE_PRIVATE_BASE_POLYMORPHIC(SummaryHandlingProxyModel)
public:
    /*! Constructor. Creates a new SummaryHandlingProxyModel with
     * parent \a parent
     */
    explicit SummaryHandlingProxyModel(QObject *parent = nullptr);
    ~SummaryHandlingProxyModel() override;

    /*! Sets the model to be used as the source model for this proxy.
     * The proxy does not take ownership of the model.
     * \see QAbstractProxyModel::setSourceModel
     */
    /*reimp*/ void setSourceModel(QAbstractItemModel *model) override;

    /*! \see QAbstractItemModel::data */
    /*reimp*/ QVariant data(const QModelIndex &proxyIndex, int role = Qt::DisplayRole) const override;

    /*! \see QAbstractItemModel::setData */
    /*reimp*/ bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;

    /*! \see QAbstractItemModel::flags */
    /*reimp*/ Qt::ItemFlags flags(const QModelIndex &idx) const override;

protected:
    /*reimp*/ void sourceModelReset() override;
    /*reimp*/ void sourceLayoutChanged() override;
    /*reimp*/ void sourceDataChanged(const QModelIndex &from, const QModelIndex &to) override;
    /*reimp*/ void sourceColumnsAboutToBeInserted(const QModelIndex &idx, int start, int end) override;
    /*reimp*/ void sourceColumnsAboutToBeRemoved(const QModelIndex &idx, int start, int end) override;
    /*reimp*/ void sourceRowsAboutToBeInserted(const QModelIndex &idx, int start, int end) override;
    /*reimp*/ void sourceRowsAboutToBeRemoved(const QModelIndex &, int start, int end) override;
};
}

#endif /* KGANTTSUMMARYHANDLINGPROXYMODEL_H */
