percent_bar_widget.h

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#ifndef PERCENT_BAR_WIDGET_H
#define PERCENT_BAR_WIDGET_H
 
#include <QPainter>
#include <QWidget>
 
class PercentBarWidget : public QWidget
{
    Q_OBJECT
 
public:
    explicit PercentBarWidget(QWidget *parent, double initialValue);
 
    void setValue(double newValue)
    {
        valueToDisplay = qBound(-100.0, newValue, 100.0); // Clamp to [-100, 100]
        update();                                         // Trigger repaint
    }
 
    double value() const
    {
        return valueToDisplay;
    }
 
protected:
    void paintEvent(QPaintEvent *event) override;
 
private:
    double valueToDisplay; // Ranges from -100 to 100
};
 
#endif // PERCENT_BAR_WIDGET_H