9 #include "qwt_polar_fitter.h" 
   11 #include <qpainterpath.h> 
   13 class QwtPolarFitter::PrivateData
 
   33     m_data = 
new PrivateData;
 
   62     return m_data->stepCount;
 
   74     if ( m_data->stepCount <= 0 || points.size() <= 1 )
 
   77     QPolygonF fittedPoints;
 
   79     int numPoints = points.size() + ( points.size() - 1 ) * m_data->stepCount;
 
   81     fittedPoints.resize( numPoints );
 
   84     fittedPoints[index++] = points[0];
 
   85     for ( 
int i = 1; i < points.size(); i++ )
 
   87         const QPointF& p1 = points[i - 1];
 
   88         const QPointF& p2 = points[i];
 
   90         const double dx = ( p2.x() - p1.x() ) / m_data->stepCount;
 
   91         const double dy = ( p2.y() - p1.y() ) / m_data->stepCount;
 
   92         for ( 
int j = 1; j <= m_data->stepCount; j++ )
 
   94             const double x = p1.x() + j * dx;
 
   95             const double y = p1.y() + j * dy;
 
   97             fittedPoints[index++] = QPointF( x, y );
 
  100     fittedPoints.resize( index );
 
  113     path.addPolygon( 
fitCurve( points ) );
 
Abstract base class for a curve fitter.
A simple curve fitter for polar points.
void setStepCount(int size)
virtual QPainterPath fitCurvePath(const QPolygonF &) const override
QwtPolarFitter(int stepCount=5)
virtual QPolygonF fitCurve(const QPolygonF &) const override
virtual ~QwtPolarFitter()
Destructor.