QSpinBox和QDoubleSpinBox

QSpinBox和QDoubleSpinBox

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    connect(ui->spinnum,SIGNAL(valueChanged(int)),this,SLOT(on_pushButton_clicked()));
    connect(ui->spinspice,SIGNAL(valueChanged(double)),this,SLOT(on_pushButton_clicked()));
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_clicked()
{
    int num = ui->spinnum->value();
    float price = ui->spinspice->value();
    float total = num*price;
    ui->spintotal->setValue(total);
}

void Widget::on_spinDec_valueChanged(int arg1)
{
    ui->spinBin->setValue(arg1);
    ui->spinHex->setValue(arg1);
}

void Widget::on_spinBin_valueChanged(int arg1)
{
    ui->spinDec->setValue(arg1);
    ui->spinHex->setValue(arg1);
}

void Widget::on_spinHex_valueChanged(int arg1)
{
    ui->spinDec->setValue(arg1);
    ui->spinBin->setValue(arg1);
}