QSpinBox、QDoubleSpinBox 的使用，进制转换

实现目的

使用QSpinBox、QDoubleSpinBox 实现数量*单价，float结果显示

使用QSpinBox、QDoubleSpinBox 实现进制的转换

拟实现界面

布局

垂直布局、groupBox中为栅格布局

控件进制设置属性 displayIntegerBase

16代表16进制

#include "spinboxexample.h"
#include "ui_spinboxexample.h"SpinBoxExample::SpinBoxExample(QWidget *parent): QWidget(parent), ui(new Ui::SpinBoxExample)
{ui->setupUi(this);
}SpinBoxExample::~SpinBoxExample()
{delete ui;
}void SpinBoxExample::on_btnCalc_clicked()
{int num = ui->spinNum->value();float price =ui->spinPrice->value();float total = num *price;ui->spinTotal->setValue(total);
}void SpinBoxExample::on_spinNum_valueChanged(int arg1)
{int num = arg1;float price =ui->spinPrice->value();float total = num* price;ui->spinTotal->setValue(total);
}void SpinBoxExample::on_spinPrice_valueChanged(double arg1)
{int num = ui->spinNum->value();float total = num *arg1;ui->spinTotal->setValue(total);
}void SpinBoxExample::on_spinDec_valueChanged(int arg1)
{ui->spinBin->setValue(arg1);ui->spinHex->setValue(arg1);
}void SpinBoxExample::on_spinBin_valueChanged(int arg1)
{ui->spinDec->setValue(arg1); //界面已经设置了 进制显示ui->spinHex->setValue(arg1);
}void SpinBoxExample::on_spinHex_valueChanged(int arg1)
{ui->spinDec->setValue(arg1);ui->spinBin->setValue(arg1);}