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);
    ~QwtCounter() override;
 
    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);
 
    QWT_DECLARE_PRIVATE(QwtCounter)
};
 
#endif