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// Copyright (C) 2003 Dominique Devriese <devriese@kde.org>
// 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 "circle_type.h"
#include "circle_imp.h"
#include "bogus_imp.h"
#include "line_imp.h"
#include "point_imp.h"
#include "../misc/common.h"
#include <tdelocale.h>
static const char constructcirclethroughpointstat[] = I18N_NOOP( "Construct a circle through this point" );
static const char constructcirclewithcenterstat[] = I18N_NOOP( "Construct a circle with this center" );
static const ArgsParser::spec argsspecCircleBCP[] =
{
{ PointImp::stype(), constructcirclewithcenterstat,
I18N_NOOP( "Select the center of the new circle..." ), false },
{ PointImp::stype(), constructcirclethroughpointstat,
I18N_NOOP( "Select a point for the new circle to go through..." ), true }
};
KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( CircleBCPType )
CircleBCPType::CircleBCPType()
: ObjectABType( "CircleBCP", argsspecCircleBCP, 2 )
{
}
CircleBCPType::~CircleBCPType()
{
}
const CircleBCPType* CircleBCPType::instance()
{
static const CircleBCPType s;
return &s;
}
ObjectImp* CircleBCPType::calc( const Coordinate& a, const Coordinate& b ) const
{
return new CircleImp( a, ( b - a ).length() );
}
const CircleBTPType* CircleBTPType::instance()
{
static const CircleBTPType t;
return &t;
}
static const ArgsParser::spec argsspecCircleBTP[] =
{
{ PointImp::stype(), constructcirclethroughpointstat,
I18N_NOOP( "Select a point for the new circle to go through..." ), true },
{ PointImp::stype(), constructcirclethroughpointstat,
I18N_NOOP( "Select a point for the new circle to go through..." ), true },
{ PointImp::stype(), constructcirclethroughpointstat,
I18N_NOOP( "Select a point for the new circle to go through..." ), true }
};
KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( CircleBTPType )
CircleBTPType::CircleBTPType()
: ArgsParserObjectType( "CircleBTP", argsspecCircleBTP, 3 )
{
}
CircleBTPType::~CircleBTPType()
{
}
ObjectImp* CircleBTPType::calc( const Args& args, const KigDocument& ) const
{
if ( ! margsparser.checkArgs( args, 2 ) ) return new InvalidImp;
const Coordinate a = static_cast<const PointImp*>( args[0] )->coordinate();
const Coordinate b = static_cast<const PointImp*>( args[1] )->coordinate();
Coordinate c;
if ( args.size() == 3 )
c = static_cast<const PointImp*>( args[2] )->coordinate();
else
{
// we pick the third point so that the three points form a
// triangle with equal sides...
// midpoint:
Coordinate m = ( b + a ) / 2;
if ( b.y != a.y )
{
// direction of the perpend:
double d = -(b.x-a.x)/(b.y-a.y);
// length:
// sqrt( 3 ) == tan( 60° ) == sqrt( 2^2 - 1^2 )
double l = 1.73205080756 * (a-b).length() / 2;
double d2 = d*d;
double l2 = l*l;
double dx = sqrt( l2 / ( d2 + 1 ) );
double dy = sqrt( l2 * d2 / ( d2 + 1 ) );
if( d < 0 ) dy = -dy;
c.x = m.x + dx;
c.y = m.y + dy;
}
else
{
c.x = m.x;
c.y = m.y + ( a.x - b.x );
};
};
const Coordinate center = calcCenter( a, b, c );
if ( center.valid() )
return new CircleImp( center, (center - a ).length() );
else return new InvalidImp;
}
const ObjectImpType* CircleBCPType::resultId() const
{
return CircleImp::stype();
}
const ObjectImpType* CircleBTPType::resultId() const
{
return CircleImp::stype();
}
static const ArgsParser::spec argsspecCircleBPR[] =
{
{ PointImp::stype(), "SHOULD NOT BE SEEN", "SHOULD NOT BE SEEN", false },
{ DoubleImp::stype(), "SHOULD NOT BE SEEN", "SHOULD NOT BE SEEN", false }
};
KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( CircleBPRType )
CircleBPRType::CircleBPRType()
: ArgsParserObjectType( "CircleBPR", argsspecCircleBPR, 2 )
{
}
CircleBPRType::~CircleBPRType()
{
}
const CircleBPRType* CircleBPRType::instance()
{
static const CircleBPRType t;
return &t;
}
ObjectImp* CircleBPRType::calc( const Args& args, const KigDocument& ) const
{
if ( ! margsparser.checkArgs( args ) ) return new InvalidImp;
const Coordinate c = static_cast<const PointImp*>( args[0] )->coordinate();
double r = static_cast<const DoubleImp*>( args[1] )->data();
return new CircleImp( c, r );
}
const ObjectImpType* CircleBPRType::resultId() const
{
return CircleImp::stype();
}
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