F:/KPlato/koffice/libs/pigment/KoHistogramProducer.h

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/*
 *  Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef _KIS_HISTOGRAM_PRODUCER_
#define _KIS_HISTOGRAM_PRODUCER_

#include <qglobal.h>
#include <ksharedptr.h>

#include <koffice_export.h>

#include <KoColorSpace.h>

#include "KoGenericRegistry.h"

class QString;
class KoChannelInfo;

class /*PIGMEMT_EXPORT*/ KoHistogramProducer : public KShared {
public:
    KoHistogramProducer() : m_skipTransparent(true), m_skipUnselected(true) {}
    virtual ~KoHistogramProducer() {}

    // Methods to change the bins

    virtual void clear() = 0;

    virtual void addRegionToBin(const quint8 * pixels, const quint8 * selectionMask, quint32 nPixels, KoColorSpace* colorSpace) = 0;

    // Methods to set what exactly is being added to the bins
    virtual void setView(double from, double width) = 0;
    virtual void setSkipTransparent(bool set) { m_skipTransparent = set; }
    virtual void setSkipUnselected(bool set) { m_skipUnselected = set; }

    // Methods with general information about this specific producer
    virtual const KoID& id() const = 0;
    virtual Q3ValueVector<KoChannelInfo *> channels() = 0;
    virtual qint32 numberOfBins() = 0;
    virtual QString positionToString(double pos) const = 0;
    virtual double viewFrom() const = 0;
    virtual double viewWidth() const = 0;
    virtual double maximalZoom() const = 0;

    // Methods to get information on the data we have seen
    virtual qint32 count() = 0;
    virtual qint32 getBinAt(qint32 channel, qint32 position) = 0;
    virtual qint32 outOfViewLeft(qint32 channel) = 0;
    virtual qint32 outOfViewRight(qint32 channel) = 0;
protected:
    bool m_skipTransparent;
    bool m_skipUnselected;
};

typedef KSharedPtr<KoHistogramProducer> KoHistogramProducerSP;

class /*PIGMEMT_EXPORT*/ KoHistogramProducerFactory {
public:
    KoHistogramProducerFactory(const KoID& id) : m_id(id) {}
    virtual ~KoHistogramProducerFactory() {}
    virtual KoHistogramProducerSP generate() = 0;
    virtual bool isCompatibleWith(KoColorSpace* colorSpace) const = 0;
    virtual float preferrednessLevelWith(KoColorSpace* colorSpace) const = 0;
    virtual const KoID& id() const { return m_id; }
protected:
    KoID m_id;
};

class /*PIGMEMT_EXPORT*/ KoHistogramProducerFactoryRegistry
    : public KoGenericRegistry<KoHistogramProducerFactory*> {
public:
    virtual ~KoHistogramProducerFactoryRegistry();
    static KoHistogramProducerFactoryRegistry* instance();
    QList<KoID> listKeysCompatibleWith(KoColorSpace* colorSpace) const;

private:
   KoHistogramProducerFactoryRegistry();
   KoHistogramProducerFactoryRegistry(const KoHistogramProducerFactoryRegistry&);
   KoHistogramProducerFactoryRegistry operator=(const KoHistogramProducerFactoryRegistry&);

   static KoHistogramProducerFactoryRegistry* m_singleton;
};

#endif // _KIS_HISTOGRAM_PRODUCER

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