学步园

    QSystemTrayIcon *trayicon;

    QMenu *trayiconMenu;

private slots:

    void onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason);

在window.cpp文件中添加如下内容，在构造函数中对添加的两个变量进行初始化添加托盘图标，链接槽函数，其中槽函数用于响应在托盘图标及托盘菜单上的鼠标点击操作：
//window.cpp

    trayicon = new QSystemTrayIcon(this);

    connect(trayicon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason)));

    QIcon icon("MyICO.ico");

    trayicon->setIcon(icon);

    trayicon->show();

void Window::changeEvent(QEvent *e)

{

    if((e->type()==QEvent::WindowStateChange)&&this->isMinimized())

    {

        this->hide();

//        QTimer::singleShot(100, this, SLOT(close()));

    }

}

void BluetoothSMS::onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason)

{

    switch(reason)

    {

    //单击

    case QSystemTrayIcon::Trigger:

        //双击

    case QSystemTrayIcon::DoubleClick:

        if(this->isHidden())

        {

            //恢复窗口显示

            this->show();

            //一下两句缺一均不能有效将窗口置顶

            this->setWindowState(Qt::WindowActive);

            this->activateWindow();

            ui->MsgText->setFocus();

        }

        else

        {

            this->hide();

        }

        break;

    default:

        break;

    }

}