qwt_analog_clock.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_ANALOG_CLOCK_H
#define QWT_ANALOG_CLOCK_H
 
#include "qwt_global.h"
#include "qwt_dial.h"
 
class QwtDialNeedle;
 
class QWT_EXPORT QwtAnalogClock : public QwtDial
{
    Q_OBJECT
 
  public:
    enum Hand
    {
        SecondHand,
 
        MinuteHand,
 
        HourHand,
 
        NHands
    };
 
    // Constructs an analog clock widget
    explicit QwtAnalogClock( QWidget* parent = nullptr );
    // Destructor
    virtual ~QwtAnalogClock();
 
    // Sets a specific clock hand needle
    void setHand( Hand, QwtDialNeedle* );
 
    // Returns a specific clock hand needle (const version)
    const QwtDialNeedle* hand( Hand ) const;
    // Returns a specific clock hand needle
    QwtDialNeedle* hand( Hand );
 
  public Q_SLOTS:
    void setCurrentTime();
 
    void setTime( const QTime& );
 
  protected:
    virtual void drawNeedle( QPainter*, const QPointF&, double radius,
        double direction, QPalette::ColorGroup ) const override;
 
    virtual void drawHand( QPainter*, Hand, const QPointF&,
        double radius, double direction, QPalette::ColorGroup ) const;
 
  private:
    // use setHand instead
    void setNeedle( QwtDialNeedle* );
 
    QwtDialNeedle* m_hand[NHands];
};
 
#endif