QT添加到系统托盘

有时需要将程序放在系统托盘，可以通过如下实现：

void Test::SetSystemTrayIcon()

{

    QIcon icon = QIcon(QPixmap(":/images/icon.png"));

    if (QSystemTrayIcon::isSystemTrayAvailable())

    {//判断系统是否支持系统托盘图标

        m_trayIcon.setIcon(icon);

        m_trayIcon.setToolTip("test");

        QMenu*  trayIconMenu = new QMenu;

        QAction* quitAction = new QAction(tr("退出 (&Q)"), this);

        trayIconMenu->addAction(quitAction);

        connect(quitAction, SIGNAL(triggered()), this, SLOT(Exit()));

        m_trayIcon.setContextMenu(trayIconMenu);

        m_trayIcon.show();

        connect(&m_trayIcon,

                SIGNAL(activated(QSystemTrayIcon::ActivationReason)),

                this,SLOT(trayiconActivated(//点击托盘中的图标

                              QSystemTrayIcon::ActivationReason)));

    }

}

实现点击托盘中的图标

void Test::trayiconActivated(

        QSystemTrayIcon::ActivationReason reason)

{

    switch (reason)

    {

    case QSystemTrayIcon::Trigger:

        //单击托盘图标

    case QSystemTrayIcon::DoubleClick:

        //双击托盘图标

        this->setWindowState(Qt::WindowActive);

        this->show();

        break;

    default:

        break;

    }

}