code_app/app/scanner/dialog_upgrade.cpp

#include "dialog_upgrade.h"
#include "ui_dialog_upgrade.h"
#include "base/HGUtility.h"
#include <QCryptographicHash>
#include <QMessageBox>
#include <QDir>
#include <QFile>

Dialog_upgrade::Dialog_upgrade(class VersionDll *versionDll, HGVersionInfo *versionInfo, QWidget *parent) :
    QDialog(parent)
    , ui(new Ui::Dialog_upgrade)
    , m_versionDll(versionDll)
    , m_versionInfo(versionInfo)
{
    ui->setupUi(this);
    setWindowTitle(tr("upgrade online"));
    setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);
    this->layout()->setSizeConstraint(QLayout::SetFixedSize);

    const HGChar *oemName = nullptr;

#if defined(OEM_HANWANG)
    oemName = HGVERSION_OEMNAME_HANVON;
#elif defined(OEM_LISICHENG)
    oemName = HGVERSION_OEMNAME_LANXUM;
#elif defined(OEM_CANGTIAN)
    oemName = HGVERSION_OEMNAME_CUMTENN;
#elif defined(OEM_ZHONGJING)
    oemName = HGVERSION_OEMNAME_MICROTEK;
#elif defined(OEM_ZIGUANG)
    oemName = HGVERSION_OEMNAME_UNIS;
#elif defined(OEM_NEUTRAL)
    oemName = HGVERSION_OEMNAME_HUAGAO_NEU;
#elif defined(OEM_DELI)
    oemName = HGVERSION_OEMNAME_DELI;
#else
    oemName = HGVERSION_OEMNAME_HUAGO;
#endif

    HGChar currVersion[64] = {0};
    m_versionDll->GetCurrVersion(HGVERSION_APPNAME_SCANNER, oemName, currVersion, 64);
    HGInt result = 0;
    m_versionDll->CompareVersion(currVersion, m_versionInfo[0].version, &result);
    if(result >= 0)
    {
        ui->label_detectResult->setText(tr("The current version is the latest!  The current version number is : ") + currVersion);
        ui->pbtn_upgrade->setVisible(false);
    }
    else
    {
        ui->pbtn_upgrade->setVisible(true);
        QString str(m_versionInfo[0].desc);
        if (!str.isEmpty())
        {
            ui->label_detectResult->setText(tr("Discover the new version : ") +
                                            m_versionInfo[0].version +
                                            tr(" ,the current version is : ") + currVersion + "\n" + "\n" +
                                            tr("upgrade contents: \n") +
                                            str + "\n");
        }
        else
        {
            ui->label_detectResult->setText(tr("Discover the new version : ") +
                                            m_versionInfo[0].version +
                                            tr(" ,the current version is : ") + currVersion);
        }

    }

}

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

QString Dialog_upgrade::getVersionNum()
{
    return m_versionNum;
}

void Dialog_upgrade::on_pbtn_upgrade_clicked()
{
    m_versionNum = m_versionInfo[0].version;
    accept();
}