qwt_counter.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_COUNTER_H
#define QWT_COUNTER_H
 
#include "qwt_global.h"
#include <qwidget.h>
 
class QWT_EXPORT QwtCounter : public QWidget
{
    Q_OBJECT
 
    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 numButtons READ numButtons WRITE setNumButtons )
    Q_PROPERTY( int stepButton1 READ stepButton1 WRITE setStepButton1 )
    Q_PROPERTY( int stepButton2 READ stepButton2 WRITE setStepButton2 )
    Q_PROPERTY( int stepButton3 READ stepButton3 WRITE setStepButton3 )
 
    Q_PROPERTY( bool readOnly READ isReadOnly WRITE setReadOnly )
    Q_PROPERTY( bool wrapping READ wrapping WRITE setWrapping )
 
  public:
    enum Button
    {
        Button1,
 
        Button2,
 
        Button3,
 
        ButtonCnt
    };
 
    explicit QwtCounter( QWidget* parent = nullptr );
    virtual ~QwtCounter();
 
    void setValid( bool );
    bool isValid() const;
 
    void setWrapping( bool );
    bool wrapping() const;
 
    bool isReadOnly() const;
    void setReadOnly( bool );
 
    void setNumButtons( int );
    int numButtons() const;
 
    void setIncSteps( QwtCounter::Button, int numSteps );
    int incSteps( QwtCounter::Button ) const;
 
    virtual QSize sizeHint() const override;
 
    double singleStep() const;
    void setSingleStep( double stepSize );
 
    void setRange( double min, double max );
 
    double minimum() const;
    void setMinimum( double );
 
    double maximum() const;
    void setMaximum( double );
 
    void setStepButton1( int nSteps );
    int stepButton1() const;
 
    void setStepButton2( int nSteps );
    int stepButton2() const;
 
    void setStepButton3( int nSteps );
    int stepButton3() const;
 
    double value() const;
 
  public Q_SLOTS:
    void setValue( double );
 
 
  Q_SIGNALS:
    void buttonReleased ( double value );
 
    void valueChanged ( double value );
 
  protected:
    virtual bool event( QEvent* ) override;
    virtual void wheelEvent( QWheelEvent* ) override;
    virtual void keyPressEvent( QKeyEvent* ) override;
 
  private Q_SLOTS:
    void btnReleased();
    void btnClicked();
    void textChanged();
 
  private:
    void incrementValue( int numSteps );
    void initCounter();
    void updateButtons();
    void showNumber( double );
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif