mergemodel.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#pragma once
 
#include <functional>
#include <QPointer>
#include <QAbstractProxyModel>
#include <QStringList>
#include <QStack>
#include "modelsconfig.h"
#include "modelitem.h"
 
namespace LC::Util
{
    class UTIL_MODELS_API MergeModel : public QAbstractItemModel
    {
        mutable bool DefaultAcceptsRowImpl_ = false;
    protected:
        using models_t = QList<QPointer<QAbstractItemModel>>;
        models_t Models_;
    private:
        QStringList Headers_;
 
        ModelItem_ptr Root_;
 
        QStack<std::function<void ()>> RemovalRefreshers_;
    public:
        using iterator = models_t::iterator;
        using const_iterator = models_t::const_iterator;
 
        explicit MergeModel (QStringList headers, QObject *parent = nullptr);
 
        int columnCount (const QModelIndex& = QModelIndex ()) const override;
        QVariant headerData (int, Qt::Orientation, int = Qt::DisplayRole) const override;
        QVariant data (const QModelIndex&, int = Qt::DisplayRole) const override;
        Qt::ItemFlags flags (const QModelIndex&) const override;
        QModelIndex index (int, int, const QModelIndex& = QModelIndex ()) const override;
        QModelIndex parent (const QModelIndex&) const override;
        int rowCount (const QModelIndex& = QModelIndex ()) const override;
 
        QStringList mimeTypes () const override;
 
        QMimeData* mimeData (const QModelIndexList& indices) const override;
 
        virtual QModelIndex mapFromSource (const QModelIndex& index) const;
 
        virtual QModelIndex mapToSource (const QModelIndex& index) const;
 
        virtual void setSourceModel (QAbstractItemModel*);
 
        void SetHeaders (const QStringList& headers);
 
        void AddModel (QAbstractItemModel *model);
 
        void RemoveModel (QAbstractItemModel *model);
 
        size_t Size () const;
 
        const_iterator FindModel (const QAbstractItemModel *model) const;
 
        iterator FindModel (const QAbstractItemModel *model);
 
        int GetStartingRow (const_iterator it) const;
 
        int GetStartingRow (iterator it);
 
        const_iterator GetModelForRow (int row, int *starting = nullptr) const;
 
        iterator GetModelForRow (int row, int *starting = nullptr);
 
        QList<QAbstractItemModel*> GetAllModels () const;
    protected:
        virtual void HandleRowsAboutToBeInserted (QAbstractItemModel*, const QModelIndex&, int, int);
        virtual void HandleRowsAboutToBeRemoved (QAbstractItemModel*, const QModelIndex&, int, int);
        virtual void HandleRowsInserted (QAbstractItemModel*, const QModelIndex&, int, int);
        virtual void HandleRowsRemoved (QAbstractItemModel*, const QModelIndex&, int, int);
        virtual void HandleModelAboutToBeReset (QAbstractItemModel*);
        virtual void HandleModelReset (QAbstractItemModel*);
 
        virtual bool AcceptsRow (QAbstractItemModel *model, int row) const;
    private:
        int RowCount (QAbstractItemModel*) const;
    };
}