qwt_polar_grid.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * QwtPolar Widget Library
 * Copyright (C) 2008   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_POLAR_GRID_H
#define QWT_POLAR_GRID_H

#include "qwt_global.h"
#include "qwt_polar.h"
#include "qwt_polar_item.h"
#include "qwt_polar_plot.h"

class QPainter;
class QPen;
class QwtScaleMap;
class QwtScaleDiv;
class QwtRoundScaleDraw;
class QwtScaleDraw;

class QWT_EXPORT QwtPolarGrid: public QwtPolarItem
{
public:
    enum DisplayFlag
    {
        SmartOriginLabel = 1,

        HideMaxRadiusLabel = 2,

        ClipAxisBackground = 4,

        SmartScaleDraw = 8,

        ClipGridLines = 16
    };

    typedef QFlags<DisplayFlag> DisplayFlags;

    enum GridAttribute
    {
        AutoScaling = 0x01
    };

    typedef QFlags<GridAttribute> GridAttributes;

    explicit QwtPolarGrid();
    virtual ~QwtPolarGrid();

    virtual int rtti() const QWT_OVERRIDE;

    void setDisplayFlag( DisplayFlag, bool on = true );
    bool testDisplayFlag( DisplayFlag ) const;

    void setGridAttribute( GridAttribute, bool on = true );
    bool testGridAttribute( GridAttribute ) const;

    void showGrid( int scaleId, bool show = true );
    bool isGridVisible( int scaleId ) const;

    void showMinorGrid( int scaleId, bool show = true );
    bool isMinorGridVisible( int scaleId ) const;

    void showAxis( int axisId, bool show = true );
    bool isAxisVisible( int axisId ) const;

    void setPen( const QPen &p );
    void setFont( const QFont & );

    void setMajorGridPen( const QPen &p );
    void setMajorGridPen( int scaleId, const QPen &p );
    QPen majorGridPen( int scaleId ) const;

    void setMinorGridPen( const QPen &p );
    void setMinorGridPen( int scaleId, const QPen &p );
    QPen minorGridPen( int scaleId ) const;

    void setAxisPen( int axisId, const QPen &p );
    QPen axisPen( int axisId ) const;

    void setAxisFont( int axisId, const QFont &p );
    QFont axisFont( int axisId ) const;

    void setScaleDraw( int axisId, QwtScaleDraw * );
    const QwtScaleDraw *scaleDraw( int axisId ) const;
    QwtScaleDraw *scaleDraw( int axisId );

    void setAzimuthScaleDraw( QwtRoundScaleDraw * );
    const QwtRoundScaleDraw *azimuthScaleDraw() const;
    QwtRoundScaleDraw *azimuthScaleDraw();

    virtual void draw( QPainter *p,
        const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
        const QPointF &pole, double radius,
        const QRectF &rect ) const QWT_OVERRIDE;

    virtual void updateScaleDiv( const QwtScaleDiv &azimuthMap,
        const QwtScaleDiv &radialMap, const QwtInterval & ) QWT_OVERRIDE;

    virtual int marginHint() const QWT_OVERRIDE;

protected:
    void drawRays( QPainter *, const QRectF &,
        const QPointF &pole, double radius,
        const QwtScaleMap &azimuthMap, const QList<double> & ) const;
    void drawCircles( QPainter *, const QRectF &,
        const QPointF &pole, const QwtScaleMap &radialMap,
        const QList<double> & ) const;

    void drawAxis( QPainter *, int axisId ) const;

private:
    void updateScaleDraws(
        const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
        const QPointF &pole, const double radius ) const;

private:
    class GridData;
    class AxisData;
    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarGrid::DisplayFlags )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarGrid::GridAttributes )

#endif