/*!
Draw symbols
\param painter Painter
\param symbol Curve symbol
\param azimuthMap Maps azimuth values to values related to 0.0, M_2PI
\param radialMap Maps radius values into painter coordinates.
\param pole Position of the pole in painter coordinates
\param from index of the first point to be painted
\param to index of the last point to be painted.
\sa setSymbol(), draw(), drawCurve()
*/
void QwtPolarCurve::drawSymbols( QPainter *painter, const QwtSymbol &symbol,
const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
const QPointF &pole, int from, int to ) const
{
painter->setBrush( symbol.brush() );
painter->setPen( symbol.pen() );
const int chunkSize = 500;
for ( int i = from; i <= to; i += chunkSize )
{
const int n = qMin( chunkSize, to - i + 1 );
QPolygonF points;
for ( int j = 0; j < n; j++ )
{
const QwtPointPolar point = sample( i + j );
if ( !qwtInsidePole( radialMap, point.radius() ) )
{
const double r = radialMap.transform( point.radius() );
const double a = azimuthMap.transform( point.azimuth() );
points += qwtPolar2Pos( pole, r, a );
}
else
{
points += pole;
}
}
if ( points.size() > 0 )
symbol.drawSymbols( painter, points );
}
}
QDebug operator<<( QDebug debug, const QwtPointPolar &point )
{
debug.nospace() << "QwtPointPolar("
<< point.azimuth() << "," << point.radius() << ")";
return debug.space();
}
/*!
Draw lines
\param painter Painter
\param azimuthMap Maps azimuth values to values related to 0.0, M_2PI
\param radialMap Maps radius values into painter coordinates.
\param pole Position of the pole in painter coordinates
\param from index of the first point to be painted
\param to index of the last point to be painted.
\sa draw(), drawLines(), setCurveFitter()
*/
void QwtPolarCurve::drawLines( QPainter *painter,
const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
const QPointF &pole, int from, int to ) const
{
int size = to - from + 1;
if ( size <= 0 )
return;
QPolygonF polyline;
if ( d_data->curveFitter )
{
QPolygonF points( size );
for ( int j = from; j <= to; j++ )
{
const QwtPointPolar point = sample( j );
points[j - from] = QPointF( point.azimuth(), point.radius() );
}
points = d_data->curveFitter->fitCurve( points );
polyline.resize( points.size() );
QPointF *polylineData = polyline.data();
QPointF *pointsData = points.data();
for ( int i = 0; i < points.size(); i++ )
{
const QwtPointPolar point( pointsData[i].x(), pointsData[i].y() );
double r = radialMap.transform( point.radius() );
const double a = azimuthMap.transform( point.azimuth() );
polylineData[i] = qwtPolar2Pos( pole, r, a );
}
}
else
{
polyline.resize( size );
QPointF *polylineData = polyline.data();
for ( int i = from; i <= to; i++ )
{
QwtPointPolar point = sample( i );
if ( !qwtInsidePole( radialMap, point.radius() ) )
{
double r = radialMap.transform( point.radius() );
const double a = azimuthMap.transform( point.azimuth() );
polylineData[i - from] = qwtPolar2Pos( pole, r, a );
}
else
{
polylineData[i - from] = pole;
}
}
}
QRectF clipRect;
if ( painter->hasClipping() )
clipRect = painter->clipRegion().boundingRect();
else
{
clipRect = painter->window();
if ( !clipRect.isEmpty() )
clipRect = painter->transform().inverted().mapRect( clipRect );
}
if ( !clipRect.isEmpty() )
{
double off = qCeil( qMax( 1.0, painter->pen().widthF() ) );
clipRect = clipRect.toRect().adjusted( -off, -off, off, off );
polyline = QwtClipper::clipPolygonF( clipRect, polyline );
}
QwtPainter::drawPolyline( painter, polyline );
painter->drawPolyline( polyline );
}
static inline QRectF qwtBoundingRect( const QwtPointPolar &sample )
{
return QRectF( sample.azimuth(), sample.radius(), 0.0, 0.0 );
}