qt点击最小化到托盘，单击双击显示窗口

QSystemTrayIcon* m_TrayIcon;
m_TrayIcon=new QSystemTrayIcon(this);
 connect(m_TrayIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),this,SLOT(on_activatedSysTrayIcon(QSystemTrayIcon::ActivationReason)));

void QtHttpServer::changeEvent(QEvent *event)
{
   if((event->type()==QEvent::WindowStateChange)&&isMinimized())
   {
       hide();
       m_TrayIcon->showMessage("SystemTrayIcon",QObject::trUtf8("程序最小化到托盘"),QSystemTrayIcon::Information,10000);
       event->ignore();
   }
}


void QtHttpServer::on_ShowMainAction()
{
    this->show();
}


void QtHttpServer::on_ExitAppAction()
{
    exit(0);
}


void QtHttpServer::on_activatedSysTrayIcon(QSystemTrayIcon::ActivationReason reason)
{
    switch(reason){
    case QSystemTrayIcon::Trigger:
        //单击托盘图标
        this->showNormal();
        break;
    case QSystemTrayIcon::DoubleClick:
        //双击托盘图标
        //双击后显示主程序窗口
        this->showNormal();
        break;
    default:
        break;
    }
}