KoPictureBase.h

/* This file is part of the KDE project
   Copyright (c) 2001 Simon Hausmann <hausmann@kde.org>
   Copyright (C) 2002, 2003, 2004 Nicolas GOUTTE <goutte@kde.org>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
#ifndef __koPictureBase_h__
#define __koPictureBase_h__
 
#include "KoPictureKey.h" // for KoPictureType
 
#include <tqstring.h>
#include <tqimage.h>
 
class KoXmlWriter;
class TQPainter;
class TQSize;
class TQIODevice;
class TQDragObject;
 
const char NULL_MIME_TYPE[]="application/x-zerosize";
 
// TODO: fix documentation

class KoPictureBase
{
public:
    KoPictureBase();

    virtual ~KoPictureBase();
 
    virtual KoPictureType::Type getType(void) const;
 
    virtual KoPictureBase* newCopy(void) const;

    virtual bool isNull(void) const;

    virtual void draw(TQPainter& painter, int x, int y, int width, int height, int sx = 0, int sy = 0, int sw = -1, int sh = -1, bool fastMode = false);

    virtual TQDragObject* dragObject( TQWidget *dragSource = 0L, const char *name = 0L );
 
    virtual bool load(TQIODevice* io, const TQString& extension);
 
    virtual bool loadData(const TQByteArray& array, const TQString& extension);

    virtual bool save(TQIODevice* io) const;

    virtual bool saveAsBase64( KoXmlWriter& writer ) const;
 
    virtual TQSize getOriginalSize(void) const;
 
    virtual TQPixmap generatePixmap(const TQSize& size, bool smoothScale = false);
 
    virtual TQString getMimeType(const TQString& extension) const;
 
    bool isSlowResizeModeAllowed(void) const;

    virtual TQImage generateImage(const TQSize& size);
 
    virtual bool hasAlphaBuffer() const
        { return false; }
    virtual void setAlphaBuffer(bool /*enable*/)
        { }
    virtual TQImage createAlphaMask(int /*conversion_flags*/ = 0) const
        { return TQImage(); }
 
    virtual void clearCache(void);
};
 
#endif /* __koPictureBase_h__ */