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/* 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
/**
* @internal
* Base class for KoPictureImage, KoPictureClipart, KoPictureEps, KoPictureWmf...
*/
class KoPictureBase
{
public:
/**
* Default constructor.
*/
KoPictureBase();
/**
* Destructor.
*/
virtual ~KoPictureBase();
virtual KoPictureType::Type getType(void) const;
virtual KoPictureBase* newCopy(void) const;
/**
* Returns true if the picture is null.
*/
virtual bool isNull(void) const;
/**
* @brief Draw the picture in a painter.
*
* The parameter @p fastMode allows the picture to be re-sized and drawn quicker if possible
*
* The parameters @p width, @p height define the desired size for the image
* Note that the image is being scaled to that size using scale() - except when printing.
* This avoids scaling the image at each paint event.
*
* The other parameters are very similar to TQPainter::drawPixmap :
* (@p x, @p y) define the position in the painter,
* (@p sx, @p sy) specify the top-left point in pixmap that is to be drawn. The default is (0, 0).
* (@p sw, @p sh) specify the size of the pixmap that is to be drawn. The default, (-1, -1), means all the way to the bottom
* right of the pixmap.
*/
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);
/**
* Create a dragobject containing this picture.
* @param dragSource must be 0 when copying to the clipboard
* @return 0L if the picture is null!
*/
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);
/**
* save file
* @param io TQIODevice used for saving
*/
virtual bool save(TQIODevice* io) const;
/**
* OASIS FlatXML support:
* Save picture as base64-encoded data into an XML writer.
*/
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;
/**
* Generate a TQImage
* (always in slow mode)
*/
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__ */
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