qdoublespinbox2.h

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#include <QDoubleSpinBox>
#include <QDebug>
 
#pragma once
 
class QDoubleSpinBox2 : public QDoubleSpinBox {
public:
  QDoubleSpinBox2(QWidget *parent) : QDoubleSpinBox(parent) {}
 
  QString textFromValue(double value) const override {
    if (value - round(value) == 0) {
      return QString::number(value) + ".0";
    } else {
      return QString::number(value);
    }
  }
};