通过 QSystemTrayIcon 和 QMenu 可以实现pc应用的系统托盘及菜单:
QSystemTrayIcon::setContextMenu(QMenu*);
关键代码(截取项目中的代码)如下:
            
            
              cpp
              
              
            
          
              //!系统托盘及菜单;
    m_sysTray = new QSystemTrayIcon(this);
    m_sysTray->setIcon(QIcon(GlobalSetting::Instance()->AppPath()+"/ico/DfaStudio/systemTrayIcon.png"));
    m_sysTray->setToolTip(Tr("MainWindow","Distributed Fiber Analyzer"));
    m_sysTray->show();
    QMenu* menu = new QMenu(this);
    QAction* showAction = new QAction(Tr("MainWindow","Show"),this);
    QAction* exitAction = new QAction(Tr("MainWindow","Exit"),this);
    menu->addAction(showAction);
    menu->addAction(exitAction);
    m_sysTray->setContextMenu(menu);
    //
    connect(showAction,&QAction::triggered,[this](){
        if(!this->isMaximized()){
            this->showMaximized();
        }
        else{
            this->showNormal();
        }
    });
    connect(exitAction,&QAction::triggered,[this](){
        if(this->dosomethingExiting()){
            qApp->quit();
        }
    });
    connect(m_sysTray,&QSystemTrayIcon::activated,[this](QSystemTrayIcon::ActivationReason reason){
        switch (reason) {
//        case QSystemTrayIcon::Trigger:
//        break;
        case QSystemTrayIcon::DoubleClick:
            if(!this->isMaximized()){
                this->showMaximized();
            }
            else{
                this->showNormal();
            }
            break;
        default:
            break;
        }
    });
        这里添加了双击托盘图标放大/还原的功能,如上QSystemTrayIcon::activated() 信号;
如何要使托盘图标是动态的,可以加一个QTimer定时器,通过 m_sysTray->setIcon()不断更换图标,如QQ的来消息时的闪动,可以轮替两张大小相同的图片,一张透明,一张高亮。这样就有一闪一闪的效果。当然还可以设置其它动画,操作方法都一样,这里就不多讲述。