qwt_polar_grid.h

/******************************************************************************
 * 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
    };
 
    Q_DECLARE_FLAGS(DisplayFlags, DisplayFlag)
 
    
    enum GridAttribute
    {
        AutoScaling = 0x01
    };
 
    Q_DECLARE_FLAGS(GridAttributes, GridAttribute)
 
    
    explicit QwtPolarGrid();
    ~QwtPolarGrid() override;
 
    virtual int rtti() const 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 override;
 
    virtual void updateScaleDiv(const QwtScaleDiv& azimuthMap, const QwtScaleDiv& radialMap, const QwtInterval&) override;
 
    virtual int marginHint() const 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:
    QWT_DECLARE_PRIVATE(QwtPolarGrid)
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QwtPolarGrid::DisplayFlags)
Q_DECLARE_OPERATORS_FOR_FLAGS(QwtPolarGrid::GridAttributes)
 
#endif