qwt_round_scale_draw.h

/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   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
 *
 * Modified by ChenZongYan in 2024 <czy.t@163.com>
 *   Summary of major modifications (see ChangeLog.md for full history):
 *   1. CMake build system & C++11 throughout.
 *   2. Core panner/ zoomer refactored:
 *        - QwtPanner → QwtCachePanner (pixmap-cache version)
 *        - New real-time QwtPlotPanner derived from QwtPicker.
 *   3. Zoomer supports multi-axis.
 *   4. Parasite-plot framework:
 *        - QwtFigure, QwtPlotParasiteLayout, QwtPlotTransparentCanvas,
 *        - QwtPlotScaleEventDispatcher, built-in pan/zoom on axis.
 *   5. New picker: QwtPlotSeriesDataPicker (works with date axis).
 *   6. Raster & color-map extensions:
 *        - QwtGridRasterData (2-D table + interpolation)
 *        - QwtLinearColorMap::stopColors(), stopPos() API rename.
 *   7. Bar-chart: expose pen/brush control.
 *   8. Amalgamated build: single QwtPlot.h / QwtPlot.cpp pair in src-amalgamate.
 *****************************************************************************/
 
#ifndef QWT_ROUND_SCALE_DRAW_H
#define QWT_ROUND_SCALE_DRAW_H
 
#include "qwt_global.h"
#include "qwt_abstract_scale_draw.h"
 
#include <qpoint.h>
 
class QWT_EXPORT QwtRoundScaleDraw : public QwtAbstractScaleDraw
{
public:
    QwtRoundScaleDraw();
    ~QwtRoundScaleDraw() override;
 
    void setRadius(double radius);
    double radius() const;
 
    void moveCenter(double x, double y);
    void moveCenter(const QPointF&);
    QPointF center() const;
 
    void setAngleRange(double angle1, double angle2);
 
    virtual double extent(const QFont&) const override;
 
protected:
    virtual void drawTick(QPainter*, double value, double len) const override;
 
    virtual void drawBackbone(QPainter*) const override;
 
    virtual void drawLabel(QPainter*, double value) const override;
 
private:
    QWT_DECLARE_PRIVATE(QwtRoundScaleDraw)
};
 
inline void QwtRoundScaleDraw::moveCenter(double x, double y)
{
    moveCenter(QPointF(x, y));
}
 
#endif