TernaryPoint.h File Reference

#include <QtDebug>
#include <QPointF>

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Classes
class	TernaryPoint
	TernaryPoint defines a point within a ternary coordinate plane. More...
Functions
QDebug	operator<< (QDebug stream, const TernaryPoint &point)
QPointF	translate (const TernaryPoint &)

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Function Documentation

QDebug operator<<	(	QDebug	stream,
		const TernaryPoint &	point
	)

Definition at line 75 of file TernaryPoint.cpp.

References TernaryPoint::a(), TernaryPoint::b(), TernaryPoint::c(), and TernaryPoint::isValid().

{
    QString string;
    QTextStream text( &string );
    text << "[TernaryPoint: ";
    if ( point.isValid() ) {
        text.setFieldWidth( 2 );
        text.setPadChar( QLatin1Char( '0' ) );
        text << ( int ) ( point.a() * 100.0 ) << "%|"
             << ( int ) ( point.b() * 100.0 ) << "%|"
             << ( int ) ( point.c() * 100.0 ) << "%]";
    } else {
        text << "a=" << point.a() << " - b=" << point.b() << " - INVALID]";
    }
    stream << string;
    return stream;
}

QPointF translate

(

const TernaryPoint &

)

Definition at line 93 of file TernaryPoint.cpp.

References TernaryPoint::a(), AxisVector_C_A, TernaryPoint::b(), and TernaryPoint::isValid().

Referenced by KDChart::TernaryPointDiagram::paint(), and KDChart::TernaryLineDiagram::paint().

{
    if ( point.isValid() ) {
        // the position is calculated by
        // - first moving along the B-C line to the function that b
        //   selects
        // - then traversing the selected function until we meet with
        //   the function that A selects (which is a parallel of the B-C
        //   line)
        QPointF bPosition( 1.0 - point.b(), 0.0 );
        QPointF aPosition( point.a() * AxisVector_C_A );
        QPointF result( bPosition + aPosition );
        return result;
    } else {
        qWarning() << "TernaryPoint::translate(TernaryPoint): cannot translate invalid ternary points:"
                   << point;
        return QPointF();
    }
}

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