qwt_wheel.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_WHEEL_H
#define QWT_WHEEL_H
 
#include "qwt_global.h"
#include <qwidget.h>
 
class QWT_EXPORT QwtWheel : public QWidget
{
    Q_OBJECT
 
    Q_PROPERTY( Qt::Orientation orientation
        READ orientation WRITE setOrientation )
 
    Q_PROPERTY( double value READ value WRITE setValue NOTIFY valueChanged USER true  )
 
    Q_PROPERTY( double minimum READ minimum WRITE setMinimum )
    Q_PROPERTY( double maximum READ maximum WRITE setMaximum )
 
    Q_PROPERTY( double singleStep READ singleStep WRITE setSingleStep )
    Q_PROPERTY( int pageStepCount READ pageStepCount WRITE setPageStepCount )
    Q_PROPERTY( bool stepAlignment READ stepAlignment WRITE setStepAlignment )
 
    Q_PROPERTY( bool tracking READ isTracking WRITE setTracking )
    Q_PROPERTY( bool wrapping READ wrapping WRITE setWrapping )
    Q_PROPERTY( bool inverted READ isInverted WRITE setInverted )
 
    Q_PROPERTY( double mass READ mass WRITE setMass )
    Q_PROPERTY( int updateInterval READ updateInterval WRITE setUpdateInterval )
 
    Q_PROPERTY( double totalAngle READ totalAngle WRITE setTotalAngle )
    Q_PROPERTY( double viewAngle READ viewAngle WRITE setViewAngle )
    Q_PROPERTY( int tickCount READ tickCount WRITE setTickCount )
    Q_PROPERTY( int wheelWidth READ wheelWidth WRITE setWheelWidth )
    Q_PROPERTY( int borderWidth READ borderWidth WRITE setBorderWidth )
    Q_PROPERTY( int wheelBorderWidth READ wheelBorderWidth WRITE setWheelBorderWidth )
 
  public:
    explicit QwtWheel( QWidget* parent = nullptr );
    virtual ~QwtWheel();
 
    double value() const;
 
    void setOrientation( Qt::Orientation );
    Qt::Orientation orientation() const;
 
    double totalAngle() const;
    double viewAngle() const;
 
    void setTickCount( int );
    int tickCount() const;
 
    void setWheelWidth( int );
    int wheelWidth() const;
 
    void setWheelBorderWidth( int );
    int wheelBorderWidth() const;
 
    void setBorderWidth( int );
    int borderWidth() const;
 
    void setInverted( bool );
    bool isInverted() const;
 
    void setWrapping( bool );
    bool wrapping() const;
 
    void setSingleStep( double );
    double singleStep() const;
 
    void setPageStepCount( int );
    int pageStepCount() const;
 
    void setStepAlignment( bool on );
    bool stepAlignment() const;
 
    void setRange( double min, double max );
 
    void setMinimum( double );
    double minimum() const;
 
    void setMaximum( double );
    double maximum() const;
 
    void setUpdateInterval( int );
    int updateInterval() const;
 
    void setTracking( bool );
    bool isTracking() const;
 
    double mass() const;
 
  public Q_SLOTS:
    void setValue( double );
    void setTotalAngle ( double );
    void setViewAngle( double );
    void setMass( double );
 
  Q_SIGNALS:
 
    void valueChanged( double value );
 
    void wheelPressed();
 
    void wheelReleased();
 
    void wheelMoved( double value );
 
  protected:
    virtual void paintEvent( QPaintEvent* ) override;
    virtual void mousePressEvent( QMouseEvent* ) override;
    virtual void mouseReleaseEvent( QMouseEvent* ) override;
    virtual void mouseMoveEvent( QMouseEvent* ) override;
    virtual void keyPressEvent( QKeyEvent* ) override;
    virtual void wheelEvent( QWheelEvent* ) override;
    virtual void timerEvent( QTimerEvent* ) override;
 
    void stopFlying();
 
    QRect wheelRect() const;
 
    virtual QSize sizeHint() const override;
    virtual QSize minimumSizeHint() const override;
 
    virtual void drawTicks( QPainter*, const QRectF& );
    virtual void drawWheelBackground( QPainter*, const QRectF& );
 
    virtual double valueAt( const QPoint& ) const;
 
  private:
    double alignedValue( double ) const;
    double boundedValue( double ) const;
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif