106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
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/******************************************************************************
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* QSkinny - Copyright (C) 2016 Uwe Rathmann
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* This file may be used under the terms of the 3-clause BSD License
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*****************************************************************************/
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#pragma once
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#include <qobject.h>
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#include <qvector.h>
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#include <qrect.h>
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#include <qnamespace.h>
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// Hiding the layout of the data behind an abstract API
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class QskPlotCurveData : public QObject
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{
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Q_OBJECT
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public:
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enum Hint
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{
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/*
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The points are monotonic in/decreasing. F.e a faster algos
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can be implemented with this information ( f.e polygon clipping )
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*/
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MonotonicX = 1 << 0,
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MonotonicY = 1 << 1,
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/*
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The data offers a bounding rectangle, that can f.e be used for
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clipping or autoscaling purposes
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*/
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BoundingRectangle = 1 << 2
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};
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Q_ENUM( Hint );
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Q_DECLARE_FLAGS( Hints, Hint )
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QskPlotCurveData( QObject* parent = nullptr );
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virtual ~QskPlotCurveData();
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void setHints( Hints );
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Hints hints() const;
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void setHint( Hint, bool on = true );
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virtual qsizetype count() const = 0;
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virtual QPointF pointAt( qsizetype index ) const = 0;
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virtual QRectF boundingRect() const;
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int upperIndex( Qt::Orientation, qreal value ) const;
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QPointF interpolatedPoint( Qt::Orientation, qreal value ) const;
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Q_SIGNALS:
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void changed();
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protected:
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mutable QRectF m_boundingRect;
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private:
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Hints m_hints = BoundingRectangle;
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};
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inline QskPlotCurveData::Hints QskPlotCurveData::hints() const
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{
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return m_hints;
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}
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Q_DECLARE_OPERATORS_FOR_FLAGS( QskPlotCurveData::Hints )
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// A simple implementation using QVector< QPointF >
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class QskPlotCurvePoints : public QskPlotCurveData
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{
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Q_OBJECT
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using Inherited = QskPlotCurveData;
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public:
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QskPlotCurvePoints( QObject* parent = nullptr );
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QskPlotCurvePoints( const QVector< QPointF >&, QObject* parent = nullptr );
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void setPoints( const QVector< QPointF >& );
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QVector< QPointF > points() const;
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qsizetype count() const override;
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QPointF pointAt( qsizetype index ) const override;
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private:
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QVector< QPointF > m_points;
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};
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inline QVector< QPointF > QskPlotCurvePoints::points() const
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{
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return m_points;
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}
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inline qsizetype QskPlotCurvePoints::count() const
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{
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return m_points.count();
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}
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inline QPointF QskPlotCurvePoints::pointAt( qsizetype index ) const
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{
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return m_points.at( index );
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}
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