QRoundProgressBar.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <QWidget>
 
#include "../qPCL.h"
 
class QPCL_ENGINE_LIB_API QRoundProgressBar : public QWidget {
    Q_OBJECT
public:
    explicit QRoundProgressBar(QWidget* parent = 0);
 
    static const int PositionLeft = 180;
    static const int PositionTop = 90;
    static const int PositionRight = 0;
    static const int PositionBottom = -90;
 
    double nullPosition() const { return m_nullPosition; }
    void setNullPosition(double position);
 
    enum BarStyle {
        StyleDonut,
        StylePie,
        StyleLine
    };
    void setBarStyle(BarStyle style);
    BarStyle barStyle() const { return m_barStyle; }
 
    void setOutlinePenWidth(double penWidth);
    double outlinePenWidth() const { return m_outlinePenWidth; }
 
    void setDataPenWidth(double penWidth);
    double dataPenWidth() const { return m_dataPenWidth; }
 
    void setDataColors(const QGradientStops& stopPoints);
 
    void setFormat(const QString& format);
    void resetFormat();
    QString format() const { return m_format; }
 
    void setDecimals(int count);
    int decimals() const { return m_decimals; }
 
    double value() const { return m_value; }
    double minimum() const { return m_min; }
    double maximum() const { return m_max; }
 
public Q_SLOTS:
    void setRange(double min, double max);
    void setMinimum(double min);
    void setMaximum(double max);
    void setValue(double val);
    void setValue(int val);
 
protected:
    virtual void paintEvent(QPaintEvent* event);
    virtual void drawBackground(QPainter& p, const QRectF& baseRect);
    virtual void drawBase(QPainter& p, const QRectF& baseRect);
    virtual void drawValue(QPainter& p,
                           const QRectF& baseRect,
                           double value,
                           double arcLength);
    virtual void calculateInnerRect(const QRectF& baseRect,
                                    double outerRadius,
                                    QRectF& innerRect,
                                    double& innerRadius);
    virtual void drawInnerBackground(QPainter& p, const QRectF& innerRect);
    virtual void drawText(QPainter& p,
                          const QRectF& innerRect,
                          double innerRadius,
                          double value);
    virtual QString valueToText(double value) const;
    virtual void valueFormatChanged();
 
    virtual QSize minimumSizeHint() const { return QSize(32, 32); }
 
    virtual bool hasHeightForWidth() const { return true; }
    virtual int heightForWidth(int w) const { return w; }
 
    void rebuildDataBrushIfNeeded();
 
    double m_min, m_max;
    double m_value;
 
    double m_nullPosition;
    BarStyle m_barStyle;
    double m_outlinePenWidth, m_dataPenWidth;
 
    QGradientStops m_gradientData;
    bool m_rebuildBrush;
 
    QString m_format;
    int m_decimals;
 
    static const int UF_VALUE = 1;
    static const int UF_PERCENT = 2;
    static const int UF_MAX = 4;
    int m_updateFlags;
};