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317 lines
9.4 KiB
317 lines
9.4 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2001, 2002, 2003 The Karbon Developers
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "vellipse.h"
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#include "vtransformcmd.h"
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#include <klocale.h>
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#include <KoUnit.h>
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#include <KoStore.h>
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#include <KoXmlWriter.h>
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#include <KoXmlNS.h>
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#include <vglobal.h>
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#include <vdocument.h>
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#include <qdom.h>
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#include <core/vfill.h>
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VEllipse::VEllipse( VObject* parent, VState state ) : VPath( parent, state )
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{
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}
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VEllipse::VEllipse( VObject* parent,
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const KoPoint& topLeft, double width, double height,
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VEllipseType type, double startAngle, double endAngle )
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: VPath( parent ), m_type( type ), m_startAngle( startAngle ), m_endAngle( endAngle )
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{
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setDrawCenterNode();
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m_rx = width / 2.0;
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m_ry = height / 2.0;
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m_center.setX( topLeft.x() + m_rx );
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m_center.setY( topLeft.y() + m_ry );
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init();
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}
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void
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VEllipse::init()
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{
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// to radials
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int nsegs;
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if( m_startAngle < m_endAngle )
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nsegs = int( floor( ( m_endAngle - m_startAngle ) / 90.0 ) );
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else
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nsegs = 4 - int( ceil( ( m_startAngle - m_endAngle ) / 90.0 ) );
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double startAngle = m_startAngle - 90.0;
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if( startAngle < 0 ) startAngle += 360.0;
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startAngle = VGlobal::pi_2 * ( startAngle / 90.0 );
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double endAngle = m_endAngle - 90.0;
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if( endAngle < 0 ) endAngle += 360.0;
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endAngle = VGlobal::pi_2 * ( endAngle / 90.0 );
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// Create (half-)unity circle with topLeft at (0|0):
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double currentAngle = -startAngle - VGlobal::pi_2;
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KoPoint start( 0.5 * sin( -startAngle ), 0.5 * cos( -startAngle ) );
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moveTo( KoPoint( start.x(), start.y() ) );
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double midAngle = currentAngle + VGlobal::pi_2 / 2.0;
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double midAmount = 0.5 / sin( VGlobal::pi_2 / 2.0 );
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for( int i = 0;i < nsegs;i++ )
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{
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midAngle -= VGlobal::pi_2;
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arcTo( KoPoint( cos( midAngle ) * midAmount, -sin( midAngle ) * midAmount ),
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KoPoint( 0.5 * sin( currentAngle ), 0.5 * cos( currentAngle ) ), 0.5 );
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currentAngle -= VGlobal::pi_2;
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}
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double rest = ( -endAngle - VGlobal::pi_2 - currentAngle ) * 90.0 / VGlobal::pi_2;
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if( rest > 0 )
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rest -= 360.0;
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if( rest != 0 )
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{
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midAngle = currentAngle - ( -rest / 360.0 ) * VGlobal::pi;
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midAmount = 0.5 / cos( currentAngle - midAngle );
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KoPoint end( 0.5 * sin( -endAngle ), 0.5 * cos( -endAngle ) );
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arcTo( KoPoint( cos( midAngle ) * midAmount, -sin( midAngle ) * midAmount ),
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KoPoint( 0.5 * sin( -endAngle ), 0.5 * cos( -endAngle ) ), 0.5 );
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}
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if( m_type == cut )
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lineTo( KoPoint( 0.0, 0.0 ) );
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if( m_type != arc )
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close();
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// Translate and scale:
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QWMatrix m;
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m.translate( m_center.x(), m_center.y() );
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m.scale( 2.0 * m_rx, 2.0 * m_ry );
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// only tranform the path data
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VTransformCmd cmd( 0L, m );
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cmd.VVisitor::visitVPath( *this );
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m_matrix.reset();
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}
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QString
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VEllipse::name() const
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{
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QString result = VObject::name();
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return !result.isEmpty() ? result : i18n( "Ellipse" );
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}
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void
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VEllipse::save( QDomElement& element ) const
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{
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VDocument *doc = document();
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if( doc && doc->saveAsPath() )
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{
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VPath::save( element );
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return;
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}
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if( state() != deleted )
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{
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QDomElement me = element.ownerDocument().createElement( "ELLIPSE" );
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element.appendChild( me );
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// save fill/stroke untransformed
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VPath path( *this );
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VTransformCmd cmd( 0L, m_matrix.invert() );
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cmd.visit( path );
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path.VObject::save( me );
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//VObject::save( me );
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me.setAttribute( "cx", m_center.x() );
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me.setAttribute( "cy", m_center.y() );
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me.setAttribute( "rx", m_rx );
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me.setAttribute( "ry", m_ry );
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me.setAttribute( "start-angle", m_startAngle );
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me.setAttribute( "end-angle", m_endAngle );
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if( m_type == cut )
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me.setAttribute( "kind", "cut" );
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else if( m_type == section )
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me.setAttribute( "kind", "section" );
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else if( m_type == arc )
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me.setAttribute( "kind", "arc" );
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else
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me.setAttribute( "kind", "full" );
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QString transform = buildSvgTransform();
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if( !transform.isEmpty() )
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me.setAttribute( "transform", transform );
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}
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}
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void
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VEllipse::saveOasis( KoStore *store, KoXmlWriter *docWriter, KoGenStyles &mainStyles, int &index ) const
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{
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// do not save deleted objects
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if( state() == deleted )
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return;
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docWriter->startElement( "draw:ellipse" );
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//save all into pt
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docWriter->addAttributePt( "svg:cx", m_center.x() );
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docWriter->addAttributePt( "svg:cy", m_center.y() );
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docWriter->addAttributePt( "svg:rx", m_rx );
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docWriter->addAttributePt( "svg:ry", m_ry );
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if( m_type == full )
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docWriter->addAttribute( "draw:kind", "full" );
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else
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{
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// the meaning of cut and section is mixed up in karbon, so just set them so for now
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// be sure to do the right thing tm for karbon 2.0
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if( m_type == section )
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docWriter->addAttribute( "draw:kind", "cut" );
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else if( m_type == cut )
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docWriter->addAttribute( "draw:kind", "section" );
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else
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docWriter->addAttribute( "draw:kind", "arc" );
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docWriter->addAttribute( "draw:start-angle", m_startAngle );
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docWriter->addAttribute( "draw:end-angle", m_endAngle );
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}
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VObject::saveOasis( store, docWriter, mainStyles, index );
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QWMatrix tmpMat;
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tmpMat.scale( 1, -1 );
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tmpMat.translate( 0, -document()->height() );
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QString transform = buildOasisTransform( m_matrix*tmpMat );
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if( !transform.isEmpty() )
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docWriter->addAttribute( "draw:transform", transform );
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docWriter->endElement();
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}
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bool
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VEllipse::loadOasis( const QDomElement &element, KoOasisLoadingContext &context )
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{
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setState( normal );
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if( element.tagName() == "ellipse" )
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{
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if( element.hasAttributeNS( KoXmlNS::svg, "rx" ) )
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m_rx = KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "rx", QString::null ) );
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else
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m_rx = 0.5 * KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "width", QString::null ) );
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if( element.hasAttributeNS( KoXmlNS::svg, "ry" ) )
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m_ry = KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "ry", QString::null ) );
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else
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m_ry = 0.5 * KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "height", QString::null ) );
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}
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else if( element.tagName() == "circle" )
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{
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if( element.hasAttributeNS( KoXmlNS::svg, "r" ) )
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m_rx = m_ry = KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "r", QString::null ) );
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else
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m_rx = m_ry = 0.5 * KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "width", QString::null ) );
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}
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if( element.hasAttributeNS( KoXmlNS::svg, "cx" ) )
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m_center.setX( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "cx", QString::null ) ) );
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else
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m_center.setX( m_rx + KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "x", QString::null ) ) );
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if( element.hasAttributeNS( KoXmlNS::svg, "cy" ) )
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m_center.setY( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "cy", QString::null ) ) );
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else
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m_center.setY( m_ry + KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "y", QString::null ) ) );
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// the meaning of cut and section is mixed up in karbon, so just set them so for now
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// be sure to do the right thing tm for karbon 2.0
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QString kind = element.attributeNS( KoXmlNS::draw, "kind", QString::null );
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if( kind == "cut" )
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m_type = section;
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else if( kind == "section" )
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m_type = cut;
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else if( kind == "arc" )
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m_type = arc;
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else
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m_type = full;
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double startAngle = element.attributeNS( KoXmlNS::draw, "start-angle", QString::null ).toDouble();
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double endAngle = element.attributeNS( KoXmlNS::draw, "end-angle", QString::null ).toDouble();
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// the shape gets mirrored in y-direction, so make the angles temporary clockwise
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// just for creating the path
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m_startAngle = 360.0 - endAngle;
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m_endAngle = 360.0 - startAngle;
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init();
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// now set the right angles
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m_startAngle = startAngle;
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m_endAngle = endAngle;
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transformByViewbox( element, element.attributeNS( KoXmlNS::svg, "viewBox", QString::null ) );
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QString trafo = element.attributeNS( KoXmlNS::draw, "transform", QString::null );
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if( !trafo.isEmpty() )
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transformOasis( trafo );
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return VObject::loadOasis( element, context );
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}
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void
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VEllipse::load( const QDomElement& element )
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{
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setState( normal );
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QDomNodeList list = element.childNodes();
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for( uint i = 0; i < list.count(); ++i )
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if( list.item( i ).isElement() )
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VObject::load( list.item( i ).toElement() );
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m_rx = KoUnit::parseValue( element.attribute( "rx" ) );
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m_ry = KoUnit::parseValue( element.attribute( "ry" ) );
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m_center.setX( KoUnit::parseValue( element.attribute( "cx" ) ) );
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m_center.setY( KoUnit::parseValue( element.attribute( "cy" ) ) );
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m_startAngle = element.attribute( "start-angle" ).toDouble();
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m_endAngle = element.attribute( "end-angle" ).toDouble();
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if( element.attribute( "kind" ) == "cut" )
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m_type = cut;
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else if( element.attribute( "kind" ) == "section" )
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m_type = section;
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else if( element.attribute( "kind" ) == "arc" )
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m_type = arc;
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else
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m_type = full;
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init();
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QString trafo = element.attribute( "transform" );
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if( !trafo.isEmpty() )
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transform( trafo );
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}
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VPath*
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VEllipse::clone() const
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{
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return new VEllipse( *this );
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}
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