kde-extraapps/gwenview/lib/document/abstractdocumentimpl.h

// vim: set tabstop=4 shiftwidth=4 expandtab:
/*
Gwenview: an image viewer
Copyright 2007 Aurélien Gâteau <agateau@kde.org>

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU 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 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 ABSTRACTDOCUMENTIMPL_H
#define ABSTRACTDOCUMENTIMPL_H

// Qt
#include <QByteArray>
#include <QObject>

// KDE

// Local
#include <lib/document/document.h>
#include <lib/orientation.h>

#include <QImage>
#include <QRect>

namespace Gwenview
{

class Document;
class DocumentJob;
class AbstractDocumentEditor;

struct AbstractDocumentImplPrivate;
class AbstractDocumentImpl : public QObject
{
    Q_OBJECT
public:
    AbstractDocumentImpl(Document*);
    virtual ~AbstractDocumentImpl();

    /**
     * This method is called by Document::switchToImpl after it has connected
     * signals to the object
     */
    virtual void init() = 0;

    virtual Document::LoadingState loadingState() const = 0;

    virtual DocumentJob* save(const KUrl&, const QByteArray& /*format*/)
    {
        return 0;
    }

    virtual AbstractDocumentEditor* editor()
    {
        return 0;
    }

    virtual QByteArray rawData() const
    {
        return QByteArray();
    }

    virtual bool isEditable() const
    {
        return false;
    }

    virtual bool isAnimated() const
    {
        return false;
    }

    virtual void startAnimation()
    {}

    virtual void stopAnimation()
    {}

    Document* document() const;

Q_SIGNALS:
    void imageRectUpdated(const QRect&);
    void metaInfoLoaded();
    void loaded();
    void loadingFailed();
    void isAnimatedUpdated();
    void editorUpdated();

protected:
    void setDocumentImage(const QImage& image);
    void setDocumentImageSize(const QSize& size);
    void setDocumentKind(MimeTypeUtils::Kind);
    void setDocumentFormat(const QByteArray& format);
    void setDocumentExiv2Image(Exiv2::Image::AutoPtr);
    void setDocumentDownSampledImage(const QImage&, int invertedZoom);
    void setDocumentErrorString(const QString&);
    void switchToImpl(AbstractDocumentImpl*  impl);

private:
    AbstractDocumentImplPrivate* const d;
};

} // namespace

#endif /* ABSTRACTDOCUMENTIMPL_H */