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// Copyright (C) 2004 Dominique Devriese <[email protected]>
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
#include "special_calcers.h"
static const ArgsParser::spec argsspecMeasureTransport[] =
{
{ CircleImp::stype(), I18N_NOOP( "Transport a measure on this circle" ) },
{ PointImp::stype(), I18N_NOOP( "Project this point onto the circle" ) },
{ SegmentImp::stype(), I18N_NOOP( "Segment to transport" ) }
};
static ArgsParser measuretransportargsparser( argsspecMeasureTransport, 3 );
std::vector<ObjectCalcer*> MeasureTransportCalcer::parents() const
{
std::vector<ObjectCalcer*> ret;
ret.push_back( mcircle );
ret.push_back( mpoint );
ret.push_back( msegment );
return ret;
}
MeasureTransportCalcer::MeasureTransportCalcer(ObjectCalcer* circle, ObjectCalcer* point, ObjectCalcer* segment )
: mcircle( circle ), mpoint( point ), msegment( segment ), mimp( 0 )
{
}
MeasureTransportCalcer::~MeasureTransportCalcer()
{
}
void MeasureTransportCalcer::calc( const KigDocument& )
{
if ( ! measuretransportargsparser.checkArgs( parents() ) )
return new InvalidImp();
if ( ! isPointOnCurve( mpoint, mcircle ) )
return new InvalidImp();
const CircleImp* c = static_cast<const CircleImp*>( mcircle->imp() );
const PointImp* p = static_cast<const PointImp*>( mpoint->imp() );
const SegmentImp* s = static_cast<const SegmentImp*>( msegment->imp() );
double param = c->getParam( p->coordinate(), doc );
double measure = s->length();
measure /= 2*c->radius()*M_PI;
param += measure;
while (param > 1) param -= 1;
const Coordinate nc = c->getPoint( param, doc );
if ( nc.valid() ) return new PointImp( nc );
else return new InvalidImp;
}
const ObjectImpType* MeasureTransportCalcer::impRequirement(
ObjectCalcer* o, const std::vector<ObjectCalcer*>& os ) const
{
if ( o->imp()->inherits( CircleImp::stype() ) )
return CircleImp::stype();
else if ( o->imp()->inherits( PointImp::stype() ) )
return PointImp::stype();
else if ( o->imp()->inherits( SegmentImp::stype() ) )
return SegmentImp::stype();
else
{
assert( false );
return 0;
}
}
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