qwt_slider.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_SLIDER_H
#define QWT_SLIDER_H
 
#include "qwt_global.h"
#include "qwt_abstract_slider.h"
 
class QwtScaleDraw;
 
class QWT_EXPORT QwtSlider : public QwtAbstractSlider
{
    Q_OBJECT
 
    Q_ENUMS(ScalePosition)
 
    Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation)
    Q_PROPERTY(ScalePosition scalePosition READ scalePosition WRITE setScalePosition)
 
    Q_PROPERTY(bool trough READ hasTrough WRITE setTrough)
    Q_PROPERTY(bool groove READ hasGroove WRITE setGroove)
 
    Q_PROPERTY(QSize handleSize READ handleSize WRITE setHandleSize)
    Q_PROPERTY(int borderWidth READ borderWidth WRITE setBorderWidth)
    Q_PROPERTY(int spacing READ spacing WRITE setSpacing)
    Q_PROPERTY(bool flatStyle READ flatStyle WRITE setFlatStyle)
 
public:
    enum ScalePosition
    {
        NoScale,
 
        LeadingScale,
 
        TrailingScale
    };
 
    explicit QwtSlider(QWidget* parent = nullptr);
    explicit QwtSlider(Qt::Orientation, QWidget* parent = nullptr);
 
    ~QwtSlider() override;
 
    void setOrientation(Qt::Orientation);
    Qt::Orientation orientation() const;
 
    void setScalePosition(ScalePosition);
    ScalePosition scalePosition() const;
 
    void setTrough(bool);
    bool hasTrough() const;
 
    void setGroove(bool);
    bool hasGroove() const;
 
    void setHandleSize(const QSize&);
    QSize handleSize() const;
 
    void setBorderWidth(int);
    int borderWidth() const;
 
    void setSpacing(int);
    int spacing() const;
 
    void setFlatStyle(bool);
    bool flatStyle() const;
 
    virtual QSize sizeHint() const override;
    virtual QSize minimumSizeHint() const override;
 
    void setScaleDraw(QwtScaleDraw*);
    const QwtScaleDraw* scaleDraw() const;
 
    void setUpdateInterval(int);
    int updateInterval() const;
 
protected:
    virtual double scrolledTo(const QPoint&) const override;
    virtual bool isScrollPosition(const QPoint&) const override;
 
    virtual void drawSlider(QPainter*, const QRect&) const;
    virtual void drawHandle(QPainter*, const QRect&, int pos) const;
 
    virtual void mousePressEvent(QMouseEvent*) override;
    virtual void mouseReleaseEvent(QMouseEvent*) override;
    virtual void resizeEvent(QResizeEvent*) override;
    virtual void paintEvent(QPaintEvent*) override;
    virtual void changeEvent(QEvent*) override;
    virtual void timerEvent(QTimerEvent*) override;
 
    virtual bool event(QEvent*) override;
 
    virtual void scaleChange() override;
 
    QRect sliderRect() const;
    QRect handleRect() const;
 
private:
    QwtScaleDraw* scaleDraw();
 
    void layoutSlider(bool);
    void initSlider(Qt::Orientation);
 
    QWT_DECLARE_PRIVATE(QwtSlider)
};
 
#endif