QT界面开发-使用new QComboBox添加触发事件

    //创建QComboBox控件
            m_comboBox = new QComboBox(ww);
            m_comboBox->setObjectName(GBK::ToUnicode(sheet1Ini));
            m_comboBox->setGeometry(0, 0, 100, 20);
            m_comboBox->setFont(font);
            m_comboBox->move(150, ((i - 3) * 30) + 0);
            for (int j = 0; j < choiseData.size(); j++)
            {
                m_comboBox->addItem(GBK::ToUnicode(choiseData[j].c_str()));
            }
            m_comboBox->setCurrentIndex(defaultValue);        
            m_comboBox->show();
            connect(m_comboBox, SIGNAL(currentIndexChanged(const QString)), this, SLOT(m_open(const QString)));

int NewEdgewinDesignTest::m_open(const QString &text)
{
    QMessageBox::warning(this, "error", text);
    return 0;
}