koffice/karbon/core/vgradient.cc

371 lines
12 KiB

/* This file is part of the KDE project
Copyright (C) 2002 - 2005, The Karbon Developers
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.
*/
#include <tqdom.h>
#include <tqbuffer.h>
#include "vdocument.h"
#include "vglobal.h"
#include "vgradient.h"
#include <KoGenStyles.h>
#include <KoXmlWriter.h>
#include <KoXmlNS.h>
int VGradient::VColorStopList::compareItems( TQPtrCollection::Item item1, TQPtrCollection::Item item2 )
{
float r1 = ( (VColorStop*)item1 )->rampPoint;
float r2 = ( (VColorStop*)item2 )->rampPoint;
return ( r1 == r2 ? 0 : r1 < r2 ? -1 : 1 );
} // VGradient::VColorStopList::compareItems
VGradient::VGradient( VGradientType type )
: m_type( type )
{
m_colorStops.setAutoDelete( true );
// set up dummy gradient
VColor color;
color.set( 1.0, 0.0, 0.0 );
addStop( color, 0.0, 0.5 );
color.set( 1.0, 1.0, 0.0 );
addStop( color, 1.0, 0.5 );
setOrigin( KoPoint( 0, 0 ) );
setVector( KoPoint( 0, 50 ) );
setRepeatMethod( VGradient::reflect );
}
VGradient::VGradient( const VGradient& gradient )
{
m_colorStops.setAutoDelete( true );
m_origin = gradient.m_origin;
m_focalPoint = gradient.m_focalPoint;
m_vector = gradient.m_vector;
m_type = gradient.m_type;
m_repeatMethod = gradient.m_repeatMethod;
m_colorStops.clear();
TQPtrVector<VColorStop> cs = gradient.colorStops();
for( uint i = 0; i < cs.count(); i++ )
m_colorStops.append( new VColorStop( *cs[i] ) );
m_colorStops.sort();
} // VGradient::VGradient
VGradient& VGradient::operator=( const VGradient& gradient )
{
m_colorStops.setAutoDelete( true );
if ( this == &gradient )
return *this;
m_origin = gradient.m_origin;
m_focalPoint = gradient.m_focalPoint;
m_vector = gradient.m_vector;
m_type = gradient.m_type;
m_repeatMethod = gradient.m_repeatMethod;
m_colorStops.clear();
TQPtrVector<VColorStop> cs = gradient.colorStops();
for( uint i = 0; i < cs.count(); i++ )
m_colorStops.append( new VColorStop( *cs[i] ) );
m_colorStops.sort();
return *this;
} // VGradient::operator=
const TQPtrVector<VColorStop> VGradient::colorStops() const
{
TQPtrVector<VColorStop> v;
m_colorStops.toVector( &v );
v.setAutoDelete( false );
return v;
} // VGradient::colorStops()
void
VGradient::clearStops()
{
m_colorStops.clear();
}
void
VGradient::addStop( const VColorStop& colorStop )
{
m_colorStops.inSort( new VColorStop( colorStop ) );
} // VGradient::addStop
void
VGradient::addStop( const VColor &color, float rampPoint, float midPoint )
{
// Clamping between 0.0 and 1.0
rampPoint = kMax( 0.0f, rampPoint );
rampPoint = kMin( 1.0f, rampPoint );
// Clamping between 0.0 and 1.0
midPoint = kMax( 0.0f, midPoint );
midPoint = kMin( 1.0f, midPoint );
// Work around stops with the same position
VColorStop *v;
for(v = m_colorStops.first(); v; v = m_colorStops.next())
{
if(rampPoint == v->rampPoint)
rampPoint += 0.001f;
}
m_colorStops.inSort( new VColorStop( rampPoint, midPoint, color ) );
}
void VGradient::removeStop( const VColorStop& colorstop )
{
m_colorStops.remove( &colorstop );
} // VGradient::removeStop
void
VGradient::save( TQDomElement& element ) const
{
TQDomElement me = element.ownerDocument().createElement( "GRADIENT" );
me.setAttribute( "originX", m_origin.x() );
me.setAttribute( "originY", m_origin.y() );
me.setAttribute( "focalX", m_focalPoint.x() );
me.setAttribute( "focalY", m_focalPoint.y() );
me.setAttribute( "vectorX", m_vector.x() );
me.setAttribute( "vectorY", m_vector.y() );
me.setAttribute( "type", m_type );
me.setAttribute( "repeatMethod", m_repeatMethod );
// save stops
VColorStop* colorstop;
TQPtrList<VColorStop>& colorStops = const_cast<VColorStopList&>( m_colorStops );
for( colorstop = colorStops.first(); colorstop; colorstop = colorStops.next() )
{
TQDomElement stop = element.ownerDocument().createElement( "COLORSTOP" );
colorstop->color.save( stop );
stop.setAttribute( "ramppoint", colorstop->rampPoint );
stop.setAttribute( "midpoint", colorstop->midPoint );
me.appendChild( stop );
}
element.appendChild( me );
}
TQString
VGradient::saveOasis( KoGenStyles &mainStyles ) const
{
bool radial = m_type == VGradient::radial;
KoGenStyle gradientStyle( radial ? VDocument::STYLE_RADIAL_GRADIENT : VDocument::STYLE_LINEAR_GRADIENT /*no family name*/);
if( radial )
{
gradientStyle.addAttribute( "draw:style", "radial" );
gradientStyle.addAttributePt( "svg:cx", m_origin.x() );
gradientStyle.addAttributePt( "svg:cy", m_origin.y() );
double dx = m_vector.x() - m_origin.x();
double dy = m_vector.y() - m_origin.y();
gradientStyle.addAttributePt( "svg:r", sqrt( dx * dx + dy * dy ) );
gradientStyle.addAttributePt( "svg:fx", m_focalPoint.x() );
gradientStyle.addAttributePt( "svg:fy", m_focalPoint.y() );
}
else
{
gradientStyle.addAttribute( "draw:style", "linear" );
gradientStyle.addAttributePt( "svg:x1", m_origin.x() );
gradientStyle.addAttributePt( "svg:y1", m_origin.y() );
gradientStyle.addAttributePt( "svg:x2", m_vector.x() );
gradientStyle.addAttributePt( "svg:y2", m_vector.y() );
}
if( m_repeatMethod == VGradient::repeat )
gradientStyle.addAttribute( "svg:spreadMethod", "repeat" );
else if( m_repeatMethod == VGradient::reflect )
gradientStyle.addAttribute( "svg:spreadMethod", "reflect" );
else
gradientStyle.addAttribute( "svg:spreadMethod", "pad" );
TQBuffer buffer;
buffer.open( IO_WriteOnly );
KoXmlWriter elementWriter( TQT_TQIODEVICE(&buffer) ); // TODO pass indentation level
// save stops
VColorStop* colorstop;
TQPtrList<VColorStop>& colorStops = const_cast<VColorStopList&>( m_colorStops );
for( colorstop = colorStops.first(); colorstop; colorstop = colorStops.next() )
{
elementWriter.startElement( "svg:stop" );
elementWriter.addAttribute( "svg:offset", TQString( "%1" ).arg( colorstop->rampPoint ) );
elementWriter.addAttribute( "svg:color", TQColor( colorstop->color ).name() );
if( colorstop->color.opacity() < 1 )
elementWriter.addAttribute( "svg:stop-opacity", TQString( "%1" ).arg( colorstop->color.opacity() ) );
elementWriter.endElement();
}
TQString elementContents = TQString::fromUtf8( buffer.buffer(), buffer.buffer().size() );
gradientStyle.addChildElement( "svg:stop", elementContents );
return mainStyles.lookup( gradientStyle, "gradient" );
}
void
VGradient::loadOasis( const TQDomElement &object, KoStyleStack &/*stack*/, VObject* parent )
{
kdDebug(38000) << "namespaceURI: " << object.namespaceURI() << endl;
kdDebug(38000) << "localName: " << object.localName() << endl;
KoRect bb;
if( parent )
bb = parent->boundingBox();
if( object.namespaceURI() == KoXmlNS::draw && object.localName() == "gradient" )
{
m_repeatMethod = VGradient::reflect;
TQString strType = object.attributeNS( KoXmlNS::draw, "style", TQString() );
if( strType == "radial" )
{
m_type = VGradient::radial;
// TODO : find out whether Oasis works with boundingBox only?
double cx = KoUnit::parseValue( object.attributeNS( KoXmlNS::draw, "cx", TQString() ).remove("%") );
m_origin.setX( bb.bottomLeft().x() + bb.width() * 0.01 * cx );
double cy = KoUnit::parseValue( object.attributeNS( KoXmlNS::draw, "cy", TQString() ).remove("%") );
m_origin.setY( bb.bottomLeft().y() - bb.height() * 0.01 * cy );
m_focalPoint = m_origin;
m_vector = bb.topRight();
}
else if( strType == "linear" )
{
m_type = VGradient::linear;
double angle = 90 + object.attributeNS( KoXmlNS::draw, "angle", "0" ).toDouble();
double radius = 0.5 * sqrt( bb.width()*bb.width() + bb.height()*bb.height() );
double sx = cos( angle * VGlobal::pi / 180 ) * radius;
double sy = sin( angle * VGlobal::pi / 180 ) * radius;
m_origin.setX( bb.center().x() + sx );
m_origin.setY( bb.center().y() + sy );
m_vector.setX( bb.center().x() - sx );
m_vector.setY( bb.center().y() - sy );
m_focalPoint = m_origin;
}
else return;
VColor startColor( TQColor( object.attributeNS( KoXmlNS::draw, "start-color", TQString() ) ) );
VColor endColor( TQColor( object.attributeNS( KoXmlNS::draw, "end-color", TQString() ) ) );
double startOpacity = 0.01 * object.attributeNS( KoXmlNS::draw, "start-intensity", "100" ).remove("%").toDouble();
double endOpacity = 0.01 * object.attributeNS( KoXmlNS::draw, "end-intensity", "100" ).remove("%").toDouble();
startColor.setOpacity( startOpacity );
endColor.setOpacity( endOpacity );
m_colorStops.clear();
addStop( startColor, 0.0, 0.5 );
addStop( endColor, 1.0, 0.0 );
m_colorStops.sort();
}
else if( object.namespaceURI() == KoXmlNS::svg )
{
if( object.localName() == "linearGradient" )
{
m_type = VGradient::linear;
m_origin.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "x1", TQString() ) ) );
m_origin.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "y1", TQString() ) ) );
m_vector.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "x2", TQString() ) ) );
m_vector.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "y2", TQString() ) ) );
m_focalPoint = m_origin;
}
else if( object.localName() == "radialGradient" )
{
m_type = VGradient::radial;
m_origin.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "cx", TQString() ) ) );
m_origin.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "cy", TQString() ) ) );
double r = KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "r", TQString() ) );
m_vector.setX( m_origin.x() + r );
m_vector.setY( m_origin.y() );
m_focalPoint.setX( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "fx", TQString() ) ) );
m_focalPoint.setY( KoUnit::parseValue( object.attributeNS( KoXmlNS::svg, "fy", TQString() ) ) );
}
TQString strSpread( object.attributeNS( KoXmlNS::svg, "spreadMethod", "pad" ) );
if( strSpread == "repeat" )
m_repeatMethod = VGradient::repeat;
else if( strSpread == "reflect" )
m_repeatMethod = VGradient::reflect;
else
m_repeatMethod = VGradient::none;
m_colorStops.clear();
// load stops
TQDomNodeList list = object.childNodes();
for( uint i = 0; i < list.count(); ++i )
{
if( list.item( i ).isElement() )
{
TQDomElement colorstop = list.item( i ).toElement();
if( colorstop.namespaceURI() == KoXmlNS::svg && colorstop.localName() == "stop" )
{
VColor color( TQColor( colorstop.attributeNS( KoXmlNS::svg, "color", TQString() ) ) );
color.setOpacity( colorstop.attributeNS( KoXmlNS::svg, "stop-opacity", "1.0" ).toDouble() );
addStop( color, colorstop.attributeNS( KoXmlNS::svg, "offset", "0.0" ).toDouble(), 0.5 );
}
}
}
m_colorStops.sort();
}
}
void
VGradient::load( const TQDomElement& element )
{
m_origin.setX( element.attribute( "originX", "0.0" ).toDouble() );
m_origin.setY( element.attribute( "originY", "0.0" ).toDouble() );
m_focalPoint.setX( element.attribute( "focalX", "0.0" ).toDouble() );
m_focalPoint.setY( element.attribute( "focalY", "0.0" ).toDouble() );
m_vector.setX( element.attribute( "vectorX", "0.0" ).toDouble() );
m_vector.setY( element.attribute( "vectorY", "0.0" ).toDouble() );
m_type = (VGradientType)element.attribute( "type", 0 ).toInt();
m_repeatMethod = (VGradientRepeatMethod)element.attribute( "repeatMethod", 0 ).toInt();
m_colorStops.clear();
// load stops
TQDomNodeList list = element.childNodes();
for( uint i = 0; i < list.count(); ++i )
{
if( list.item( i ).isElement() )
{
TQDomElement colorstop = list.item( i ).toElement();
if( colorstop.tagName() == "COLORSTOP" )
{
VColor color;
color.load( colorstop.firstChild().toElement() );
addStop( color, colorstop.attribute( "ramppoint", "0.0" ).toDouble(), colorstop.attribute( "midpoint", "0.5" ).toDouble() );
}
}
}
m_colorStops.sort();
}
void
VGradient::transform( const TQWMatrix &m )
{
m_origin = m_origin.transform( m );
m_focalPoint = m_focalPoint.transform( m );
m_vector = m_vector.transform( m );
}