lib

KoPictureBase.cpp

00001 /* This file is part of the KDE project
00002    Copyright (c) 2001 Simon Hausmann <hausmann@kde.org>
00003    Copyright (C) 2002, 2003 Nicolas GOUTTE <goutte@kde.org>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License as published by the Free Software Foundation; either
00008    version 2 of the License, or (at your option) any later version.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this library; see the file COPYING.LIB.  If not, write to
00017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019 */
00020 
00021 #include "KoPictureBase.h"
00022 
00023 #include <KoXmlWriter.h>
00024 
00025 #include <kdebug.h>
00026 #include <kconfig.h>
00027 #include <kglobal.h>
00028 
00029 #include <kmdcodec.h>
00030 #include <qpainter.h>
00031 #include <qpicture.h>
00032 #include <qpixmap.h>
00033 #include <qdragobject.h>
00034 
00035 static int s_useSlowResizeMode = -1; // unset
00036 
00037 KoPictureBase::KoPictureBase(void)
00038 {
00039     // Slow mode can be very slow, especially at high zoom levels -> configurable
00040     if ( s_useSlowResizeMode == -1 )
00041     {
00042         KConfigGroup group( KGlobal::config(), "KOfficeImage" );
00043         s_useSlowResizeMode = group.readNumEntry( "HighResolution", 1 );
00044         kdDebug(30003) << "HighResolution = " << s_useSlowResizeMode << endl;
00045     }
00046 }
00047 
00048 KoPictureBase::~KoPictureBase(void)
00049 {
00050 }
00051 
00052 KoPictureBase* KoPictureBase::newCopy(void) const
00053 {
00054     return new KoPictureBase(*this);
00055 }
00056 
00057 KoPictureType::Type KoPictureBase::getType(void) const
00058 {
00059     return KoPictureType::TypeUnknown;
00060 }
00061 
00062 bool KoPictureBase::isNull(void) const
00063 {
00064     return true;    // A KoPictureBase is always null.
00065 }
00066 
00067 void KoPictureBase::draw(QPainter& painter, int x, int y, int width, int height, int, int, int, int, bool /*fastMode*/)
00068 {
00069     // Draw a light red box (easier DEBUG)
00070     kdWarning(30003) << "Drawing light red rectangle! (KoPictureBase::draw)" << endl;
00071     painter.save();
00072     painter.setBrush(QColor(128,0,0));
00073     painter.drawRect(x,y,width,height);
00074     painter.restore();
00075 }
00076 
00077 bool KoPictureBase::load(QIODevice* io, const QString& extension)
00078 {
00079     return loadData(io->readAll(), extension);
00080 }
00081 
00082 bool KoPictureBase::loadData(const QByteArray&, const QString&)
00083 {
00084     // Nothing to load!
00085     return false;
00086 }
00087 
00088 bool KoPictureBase::save(QIODevice*) const
00089 {
00090     // Nothing to save!
00091     return false;
00092 }
00093 
00094 bool KoPictureBase::saveAsBase64( KoXmlWriter& writer ) const
00095 {
00096     QBuffer buffer;
00097     buffer.open(IO_ReadWrite);
00098     if ( !save( &buffer ) )
00099         return false;
00100     QCString encoded = KCodecs::base64Encode( buffer.buffer() );
00101     writer.addTextNode( encoded );
00102     return true;
00103 }
00104 
00105 QSize KoPictureBase::getOriginalSize(void) const
00106 {
00107     return QSize(0,0);
00108 }
00109 
00110 QPixmap KoPictureBase::generatePixmap(const QSize&, bool /*smoothScale*/)
00111 {
00112     return QPixmap();
00113 }
00114 
00115 QString KoPictureBase::getMimeType(const QString&) const
00116 {
00117     return QString(NULL_MIME_TYPE);
00118 }
00119 
00120 bool KoPictureBase::isSlowResizeModeAllowed(void) const
00121 {
00122     return s_useSlowResizeMode != 0;
00123 }
00124 
00125 QDragObject* KoPictureBase::dragObject( QWidget * dragSource, const char * name )
00126 {
00127     QImage image (generateImage(getOriginalSize()));
00128     if (image.isNull())
00129         return 0L;
00130     else
00131         return new QImageDrag( image, dragSource, name );
00132 }
00133 
00134 QImage KoPictureBase::generateImage(const QSize& size)
00135 {
00136     return generatePixmap(size,true).convertToImage();
00137 }
00138 
00139 void KoPictureBase::clearCache(void)
00140 {
00141     // Nothign to do!
00142 }
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