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90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
3 weeks ago
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_POINT_MAPPER_H
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#define QWT_POINT_MAPPER_H
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#include "qwt_global.h"
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#include "qwt_series_data.h"
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#include <qimage.h>
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class QwtScaleMap;
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class QPolygonF;
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class QPolygon;
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/*!
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\brief A helper class for translating a series of points
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QwtPointMapper is a collection of methods and optimizations
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for translating a series of points into paint device coordinates.
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It is used by QwtPlotCurve but might also be useful for
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similar plot items displaying a QwtSeriesData<QPointF>.
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*/
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class QWT_EXPORT QwtPointMapper
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{
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public:
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/*!
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\brief Flags affecting the transformation process
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\sa setFlag(), setFlags()
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*/
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enum TransformationFlag
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{
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//! Round points to integer values
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RoundPoints = 0x01,
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/*!
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Try to remove points, that are translated to the
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same position.
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*/
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WeedOutPoints = 0x02
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};
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/*!
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\brief Flags affecting the transformation process
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\sa setFlag(), setFlags()
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*/
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typedef QFlags<TransformationFlag> TransformationFlags;
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QwtPointMapper();
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~QwtPointMapper();
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void setFlags( TransformationFlags );
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TransformationFlags flags() const;
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void setFlag( TransformationFlag, bool on = true );
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bool testFlag( TransformationFlag ) const;
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void setBoundingRect( const QRectF & );
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QRectF boundingRect() const;
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QPolygonF toPolygonF( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtSeriesData<QPointF> *series, int from, int to ) const;
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QPolygon toPolygon( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtSeriesData<QPointF> *series, int from, int to ) const;
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QPolygon toPoints( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtSeriesData<QPointF> *series, int from, int to ) const;
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QPolygonF toPointsF( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtSeriesData<QPointF> *series, int from, int to ) const;
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QImage toImage( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtSeriesData<QPointF> *series, int from, int to,
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const QPen &, bool antialiased, uint numThreads ) const;
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private:
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class PrivateData;
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PrivateData *d_data;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPointMapper::TransformationFlags )
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#endif
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