C++ qt实现打开关闭状态按钮的代码

#include "widget.h"
#include "ui_widget.h"
#include <QMessageBox>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    ui->checkBox->setText("");
    ui->checkBox->setFixedSize(128, 64);
    QString qss = "QCheckBox::indicator:unchecked{ \
    image:url(:/resources/status_close.png); \
    } \
    QCheckBox::indicator:checked { \
    image: url(:/resources/status_open.png); \
    }";
    ui->checkBox->setStyleSheet(qss);
    ui->checkBox->setChecked(true);
    connect(ui->checkBox, &QCheckBox::stateChanged, this, &Widget::slot_stateChanged);
}
Widget::~Widget()
{
    delete ui;
}
void Widget::slot_stateChanged(int state)
{
    if(ui->checkBox->isChecked())
    {
        //QMessageBox::information(this, "tips", "open");
    }
    else
    {
        //QMessageBox::information(this, "tips", "close");
    }
}