qwt_polar_plot.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_PLOT_H
#define QWT_POLAR_PLOT_H
 
#include "qwt_global.h"
#include "qwt_polar.h"
#include "qwt_polar_itemdict.h"
#include "qwt_interval.h"
#include "qwt_scale_map.h"
#include "qwt_point_polar.h"
#include <qframe.h>
 
class QwtRoundScaleDraw;
class QwtScaleEngine;
class QwtScaleDiv;
class QwtTextLabel;
class QwtPolarCanvas;
class QwtPolarLayout;
class QwtAbstractLegend;
 
class QWT_EXPORT QwtPolarPlot : public QFrame, public QwtPolarItemDict
{
    Q_OBJECT
 
    Q_PROPERTY(QBrush plotBackground READ plotBackground WRITE setPlotBackground)
    Q_PROPERTY(double azimuthOrigin READ azimuthOrigin WRITE setAzimuthOrigin)
 
public:
    enum LegendPosition
    {
        LeftLegend,
 
        RightLegend,
 
        BottomLegend,
 
        TopLegend,
 
        ExternalLegend
    };
 
    explicit QwtPolarPlot(QWidget* parent = nullptr);
    QwtPolarPlot(const QwtText& title, QWidget* parent = nullptr);
 
    virtual ~QwtPolarPlot();
 
    void setTitle(const QString&);
    void setTitle(const QwtText&);
 
    QwtText title() const;
 
    QwtTextLabel* titleLabel();
    const QwtTextLabel* titleLabel() const;
 
    void setAutoReplot(bool tf = true);
    bool autoReplot() const;
 
    void setAutoScale(int scaleId);
    bool hasAutoScale(int scaleId) const;
 
    void setScaleMaxMinor(int scaleId, int maxMinor);
    int scaleMaxMinor(int scaleId) const;
 
    int scaleMaxMajor(int scaleId) const;
    void setScaleMaxMajor(int scaleId, int maxMajor);
 
    QwtScaleEngine* scaleEngine(int scaleId);
    const QwtScaleEngine* scaleEngine(int scaleId) const;
    void setScaleEngine(int scaleId, QwtScaleEngine*);
 
    void setScale(int scaleId, double min, double max, double step = 0);
 
    void setScaleDiv(int scaleId, const QwtScaleDiv&);
    const QwtScaleDiv* scaleDiv(int scaleId) const;
    QwtScaleDiv* scaleDiv(int scaleId);
 
    QwtScaleMap scaleMap(int scaleId, double radius) const;
    QwtScaleMap scaleMap(int scaleId) const;
 
    void updateScale(int scaleId);
 
    double azimuthOrigin() const;
 
    void zoom(const QwtPointPolar&, double factor);
    void unzoom();
 
    QwtPointPolar zoomPos() const;
    double zoomFactor() const;
 
    // Canvas
 
    QwtPolarCanvas* canvas();
    const QwtPolarCanvas* canvas() const;
 
    void setPlotBackground(const QBrush& c);
    const QBrush& plotBackground() const;
 
    virtual void drawCanvas(QPainter*, const QRectF&) const;
 
    // Legend
 
    void insertLegend(QwtAbstractLegend*, LegendPosition = RightLegend, double ratio = -1.0);
 
    QwtAbstractLegend* legend();
    const QwtAbstractLegend* legend() const;
 
    void updateLegend();
    void updateLegend(const QwtPolarItem*);
 
    // Layout
    QwtPolarLayout* plotLayout();
    const QwtPolarLayout* plotLayout() const;
 
    QwtInterval visibleInterval() const;
    QRectF plotRect() const;
    QRectF plotRect(const QRectF&) const;
 
    int plotMarginHint() const;
 
    virtual QVariant itemToInfo(QwtPolarItem*) const;
    virtual QwtPolarItem* infoToItem(const QVariant&) const;
 
Q_SIGNALS:
    void itemAttached(QwtPolarItem* plotItem, bool on);
 
    void legendDataChanged(const QVariant& itemInfo, const QList< QwtLegendData >& data);
 
    void layoutChanged();
 
public Q_SLOTS:
    virtual void replot();
    void autoRefresh();
    void setAzimuthOrigin(double);
 
protected:
    virtual bool event(QEvent*) override;
    virtual void resizeEvent(QResizeEvent*) override;
 
    virtual void updateLayout();
 
    virtual void drawItems(QPainter* painter,
                           const QwtScaleMap& radialMap,
                           const QwtScaleMap& azimuthMap,
                           const QPointF& pole,
                           double radius,
                           const QRectF& canvasRect) const;
 
private:
    friend class QwtPolarItem;
    void attachItem(QwtPolarItem*, bool);
 
    void initPlot(const QwtText&);
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif