kpresenter

KPrPolygonObject.cpp

00001 // -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4; -*-
00002 /* This file is part of the KDE project
00003    Copyright (C) 2001 Toshitaka Fujioka <fujioka@kde.org>
00004    Copyright (C) 2005 Thorsten Zachmann <zachmann@kde.org>
00005 
00006    This library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Library General Public
00008    License as published by the Free Software Foundation; either
00009    version 2 of the License, or (at your option) any later version.
00010 
00011    This library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Library General Public License for more details.
00015 
00016    You should have received a copy of the GNU Library General Public License
00017    along with this library; see the file COPYING.LIB.  If not, write to
00018    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #include "KPrPolygonObject.h"
00023 #include "KPrGradient.h"
00024 #include <KoTextZoomHandler.h>
00025 #include <kdebug.h>
00026 #include <qbitmap.h>
00027 #include <qregion.h>
00028 #include <qdom.h>
00029 #include <qpicture.h>
00030 #include <qpainter.h>
00031 #include "KPrPolygonObjectIface.h"
00032 #include <KoUnit.h>
00033 #include <KoOasisContext.h>
00034 #include <math.h>
00035 #include <KoXmlNS.h>
00036 #include "KoPen.h"
00037 
00038 using namespace std;
00039 
00040 KPrPolygonObject::KPrPolygonObject()
00041     : KPr2DObject()
00042 {
00043 }
00044 
00045 KPrPolygonObject::KPrPolygonObject( const KoPointArray &_points, const KoSize &_size,
00046                                   const KoPen &_pen, const QBrush &_brush,
00047                                   FillType _fillType, const QColor &_gColor1, const QColor &_gColor2, BCType _gType,
00048                                   bool _unbalanced, int _xfactor, int _yfactor,
00049                                   bool _checkConcavePolygon, int _cornersValue, int _sharpnessValue )
00050     : KPr2DObject( _pen, _brush, _fillType, _gColor1, _gColor2, _gType, _unbalanced, _xfactor, _yfactor )
00051 {
00052     points = KoPointArray( _points );
00053     ext = _size;
00054 
00055     checkConcavePolygon = _checkConcavePolygon;
00056     cornersValue = _cornersValue;
00057     sharpnessValue = _sharpnessValue;
00058 }
00059 
00060 KPrPolygonObject &KPrPolygonObject::operator=( const KPrPolygonObject & )
00061 {
00062     return *this;
00063 }
00064 
00065 DCOPObject* KPrPolygonObject::dcopObject()
00066 {
00067     if ( !dcop )
00068         dcop = new KPrPolygonObjectIface( this );
00069     return dcop;
00070 }
00071 
00072 bool KPrPolygonObject::saveOasisObjectAttributes( KPOasisSaveContext &sc ) const
00073 {
00074     sc.xmlWriter.addAttribute( "draw:corners", cornersValue );
00075     sc.xmlWriter.addAttribute( "draw:concave", checkConcavePolygon ? "true" : "false" );
00076     if ( checkConcavePolygon )
00077     {
00078         sc.xmlWriter.addAttribute( "draw:sharpness", QString( "%1%").arg( sharpnessValue ) );
00079     }
00080 
00081     return true;
00082 }
00083 
00084 const char * KPrPolygonObject::getOasisElementName() const
00085 {
00086     return "draw:regular-polygon";
00087 }
00088 
00089 
00090 QDomDocumentFragment KPrPolygonObject::save( QDomDocument& doc, double offset )
00091 {
00092     QDomDocumentFragment fragment = KPr2DObject::save( doc, offset );
00093 
00094     QDomElement elemSettings = doc.createElement( "SETTINGS" );
00095 
00096     elemSettings.setAttribute( "checkConcavePolygon", static_cast<int>( checkConcavePolygon ) );
00097     elemSettings.setAttribute( "cornersValue", cornersValue );
00098     elemSettings.setAttribute( "sharpnessValue", sharpnessValue );
00099 
00100     fragment.appendChild( elemSettings );
00101 
00102     if ( !points.isNull() ) {
00103         QDomElement elemPoints = doc.createElement( "POINTS" );
00104         KoPointArray::ConstIterator it;
00105         for ( it = points.begin(); it != points.end(); ++it ) {
00106             QDomElement elemPoint = doc.createElement( "Point" );
00107             KoPoint point = (*it);
00108             elemPoint.setAttribute( "point_x", point.x() );
00109             elemPoint.setAttribute( "point_y", point.y() );
00110 
00111             elemPoints.appendChild( elemPoint );
00112         }
00113         fragment.appendChild( elemPoints );
00114     }
00115 
00116     return fragment;
00117 }
00118 
00119 void KPrPolygonObject::loadOasis( const QDomElement &element, KoOasisContext & context, KPrLoadingInfo *info )
00120 {
00121     kdDebug()<<"void KPrPolygonObject::loadOasis( const QDomElement &element )***********\n";
00122     KPr2DObject::loadOasis( element,context, info );
00123     cornersValue = element.attributeNS( KoXmlNS::draw, "corners", QString::null ).toInt();
00124     checkConcavePolygon = element.attributeNS( KoXmlNS::draw, "concave", QString::null ) == "true";
00125     sharpnessValue = 0;
00126     if ( checkConcavePolygon )
00127     {
00128         sharpnessValue = element.attributeNS( KoXmlNS::draw, "sharpness", QString::null ).remove( '%').toInt();
00129     }
00130     drawPolygon();
00131 }
00132 
00133 double KPrPolygonObject::load( const QDomElement &element )
00134 {
00135     double offset=KPr2DObject::load( element );
00136 
00137     QDomElement e = element.namedItem( "SETTINGS" ).toElement();
00138     if ( !e.isNull() ) {
00139         bool _checkConcavePolygon = false;
00140         int _cornersValue = 3;
00141         int _sharpnessValue = 0;
00142 
00143         if ( e.hasAttribute( "checkConcavePolygon" ) )
00144             _checkConcavePolygon = static_cast<bool>( e.attribute( "checkConcavePolygon" ).toInt() );
00145         if ( e.hasAttribute( "cornersValue" ) )
00146             _cornersValue = e.attribute( "cornersValue" ).toInt();
00147         if ( e.hasAttribute( "sharpnessValue" ) )
00148             _sharpnessValue = e.attribute( "sharpnessValue" ).toInt();
00149 
00150         checkConcavePolygon = _checkConcavePolygon;
00151         cornersValue = _cornersValue;
00152         sharpnessValue = _sharpnessValue;
00153     }
00154 
00155     e = element.namedItem( "POINTS" ).toElement();
00156     if ( !e.isNull() ) {
00157         QDomElement elemPoint = e.firstChild().toElement();
00158         unsigned int index = 0;
00159         while ( !elemPoint.isNull() ) {
00160             if ( elemPoint.tagName() == "Point" ) {
00161                 double tmpX = 0;
00162                 double tmpY = 0;
00163                 if( elemPoint.hasAttribute( "point_x" ) )
00164                     tmpX = elemPoint.attribute( "point_x" ).toDouble();
00165                 if( elemPoint.hasAttribute( "point_y" ) )
00166                     tmpY = elemPoint.attribute( "point_y" ).toDouble();
00167 
00168                 points.putPoints( index, 1, tmpX,tmpY );
00169             }
00170             elemPoint = elemPoint.nextSibling().toElement();
00171             ++index;
00172         }
00173     }
00174     return offset;
00175 }
00176 
00177 void KPrPolygonObject::setSize( double _width, double _height )
00178 {
00179     KoSize origSize( ext );
00180     KPrObject::setSize( _width, _height );
00181 
00182     double fx = ext.width() / origSize.width();
00183     double fy = ext.height() / origSize.height();
00184 
00185     updatePoints( fx, fy );
00186 }
00187 
00188 void KPrPolygonObject::updatePoints( double _fx, double _fy )
00189 {
00190     int index = 0;
00191     KoPointArray tmpPoints;
00192     KoPointArray::ConstIterator it;
00193     for ( it = points.begin(); it != points.end(); ++it ) {
00194         KoPoint point = (*it);
00195         double tmpX = point.x() * _fx;
00196         double tmpY = point.y() * _fy;
00197 
00198         tmpPoints.putPoints( index, 1, tmpX,tmpY );
00199         ++index;
00200     }
00201     points = tmpPoints;
00202 }
00203 
00204 void KPrPolygonObject::paint( QPainter* _painter,KoTextZoomHandler*_zoomHandler,
00205                              int /* pageNum */, bool drawingShadow, bool drawContour )
00206 {
00207     int _w = ( pen.style() == Qt::NoPen ) ? 1 : pen.width();//pen.width();
00208 
00209     if ( drawContour ) {
00210         QPointArray pointArray2 = points.zoomPointArray( _zoomHandler );
00211         QPen pen3( Qt::black, 1, Qt::DotLine );
00212         _painter->setPen( pen3 );
00213         _painter->setRasterOp( Qt::NotXorROP );
00214         _painter->drawPolygon( pointArray2 );
00215         return;
00216     }
00217 
00218     QPointArray pointArray = points.zoomPointArray( _zoomHandler, _w );
00219     QPen pen2 = pen.zoomedPen( _zoomHandler );
00220 
00221     if ( drawingShadow || getFillType() == FT_BRUSH || !gradient ) {
00222         _painter->setPen( pen2 );
00223         _painter->setBrush( getBrush() );
00224         _painter->drawPolygon( pointArray );
00225     }
00226     else {
00227         QSize size( _zoomHandler->zoomSize( ext ) );
00228         if ( m_redrawGradientPix || gradient->size() != size )
00229         {
00230             m_redrawGradientPix = false;
00231             gradient->setSize( size );
00232             QRegion clipregion( pointArray );
00233             m_gradientPix.resize( size );
00234             m_gradientPix.fill( Qt::white );
00235 
00236             QPainter p;
00237             p.begin( &m_gradientPix );
00238             p.setClipRegion( clipregion );
00239             p.drawPixmap( 0, 0, gradient->pixmap() );
00240             p.end();
00241 
00242             m_gradientPix.setMask( m_gradientPix.createHeuristicMask() );
00243         }
00244 
00245         QRect _rect = pointArray.boundingRect();
00246         _painter->drawPixmap( 0, 0, m_gradientPix, 0, 0, _rect.width(), _rect.height() );
00247 
00248         _painter->setPen( pen2 );
00249         _painter->setBrush( Qt::NoBrush );
00250         _painter->drawPolygon( pointArray );
00251 
00252     }
00253 }
00254 
00255 void KPrPolygonObject::drawPolygon()
00256 {
00257     kdDebug()<<"void KPrPolygonObject::drawPolygon()***********\n";
00258     KoRect _rect( 0, 0, ext.width(), ext.height() );
00259     double angle = 2 * M_PI / cornersValue;
00260     double diameter = static_cast<double>( QMAX( _rect.width(), _rect.height() ) );
00261     double radius = diameter * 0.5;
00262 
00263     KoPointArray _points( checkConcavePolygon ? cornersValue * 2 : cornersValue );
00264     _points.setPoint( 0, 0, qRound( -radius ) );
00265 
00266     double xmin = 0;
00267     double ymin = qRound( -radius );
00268 
00269     if ( checkConcavePolygon ) {
00270         angle = angle / 2.0;
00271         double a = angle;
00272         double r = radius - ( sharpnessValue / 100.0 * radius );
00273         for ( int i = 1; i < cornersValue * 2; ++i ) {
00274             double xp, yp;
00275             if ( i % 2 ) {
00276                 xp =  r * sin( a );
00277                 yp = -r * cos( a );
00278             }
00279             else {
00280                 xp = radius * sin( a );
00281                 yp = -radius * cos( a );
00282             }
00283             a += angle;
00284             _points.setPoint( i, xp, yp );
00285             if (xp < xmin)
00286                 xmin = xp;
00287             if (yp < ymin)
00288                 ymin = yp;
00289         }
00290     }
00291     else {
00292         double a = angle;
00293         for ( int i = 1; i < cornersValue; ++i ) {
00294             double xp = radius * sin( a );
00295             double yp = -radius * cos( a );
00296             a += angle;
00297             _points.setPoint( i, xp, yp );
00298             if (xp < xmin)
00299                 xmin = xp;
00300             if (yp < ymin)
00301                 ymin = yp;
00302         }
00303     }
00304 
00305     // calculate the points as offsets to 0,0
00306     KoRect _changRect = _points.boundingRect();
00307     double fx = _rect.width() / _changRect.width();
00308     double fy = _rect.height() / _changRect.height();
00309 
00310     int _index = 0;
00311     KoPointArray tmpPoints;
00312     KoPointArray::ConstIterator it;
00313     for ( it = _points.begin(); it != _points.end(); ++it ) {
00314         KoPoint point = (*it);
00315         double tmpX = ( point.x() - xmin) * fx;
00316         double tmpY = ( point.y() - ymin) * fy;
00317 
00318         tmpPoints.putPoints( _index, 1, tmpX,tmpY );
00319         ++_index;
00320     }
00321 
00322     points = tmpPoints;
00323 
00324     if ( getFillType() == FT_GRADIENT && gradient )
00325         m_redrawGradientPix = true;
00326 }
00327 
00328 void KPrPolygonObject::flip( bool horizontal )
00329 {
00330     KPr2DObject::flip( horizontal );
00331     // flip the points
00332     KoPointArray tmpPoints;
00333     int index = 0;
00334     if ( ! horizontal )
00335     {
00336         KoPointArray::ConstIterator it;
00337         double horiz = getSize().height()/2;
00338         for ( it = points.begin(); it != points.end(); ++it ) {
00339             KoPoint point = (*it);
00340             if ( point.y()> horiz )
00341                 tmpPoints.putPoints( index, 1, point.x(),point.y()- 2*(point.y()-horiz) );
00342             else
00343                 tmpPoints.putPoints( index, 1, point.x(),point.y()+ 2*(horiz - point.y()) );
00344             ++index;
00345         }
00346     }
00347     else
00348     {
00349         KoPointArray::ConstIterator it;
00350         double vert = getSize().width()/2;
00351         for ( it = points.begin(); it != points.end(); ++it ) {
00352             KoPoint point = (*it);
00353             if ( point.x()> vert )
00354                 tmpPoints.putPoints( index, 1, point.x()- 2*(point.x()-vert), point.y() );
00355             else
00356                 tmpPoints.putPoints( index, 1, point.x()+ 2*(vert - point.x()),point.y() );
00357             ++index;
00358         }
00359     }
00360     points = tmpPoints;
00361 }
00362 
00363 KoSize KPrPolygonObject::getRealSize() const {
00364     KoSize size( ext );
00365     KoPoint realOrig( orig );
00366     KoPointArray p( points );
00367     getRealSizeAndOrigFromPoints( p, angle, size, realOrig );
00368     return size;
00369 }
00370 
00371 KoPoint KPrPolygonObject::getRealOrig() const {
00372     KoSize size( ext );
00373     KoPoint realOrig( orig );
00374     KoPointArray p( points );
00375     getRealSizeAndOrigFromPoints( p, angle, size, realOrig );
00376     return realOrig;
00377 }
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