void Form::contextMenuEvent(QContextMenuEvent *event)

{

    //创建菜单、菜单项

    QMenu *pop_menu = new QMenu();

    QAction *add_images_action = new QAction(this);

    QAction *add_folder_action = new QAction(this);

    QAction *remove_selected_action = new QAction(this);

    QAction *remove_all_action = new QAction(this);

    add_images_action->setText(tr("add images"));

    add_folder_action->setText(tr("add folder"));

    remove_selected_action->setText(tr("remove selected images"));

    remove_all_action->setText(tr("remove all images"));

    //清除原有菜单

    pop_menu->addAction(add_images_action);

    pop_menu->addAction(add_folder_action);

    pop_menu->addAction(remove_selected_action);

    pop_menu->addAction(remove_all_action);

    //菜单出现的位置为当前鼠标的位置

    pop_menu->exec(QCursor::pos());

}

　　 QMenu *remove_menu = new QMenu();

    QAction *remove_selected_action = new QAction(remove_menu);

    QAction *remove_all_action = new QAction(remove_menu);

    remove_menu->addAction(remove_selected_action);

    remove_menu->addAction(remove_all_action);

    ui->pushButton->setMenu(remove_menu);

    ui->pushButton->setText(tr("remove"));

    remove_selected_action->setText(tr("remove selected watermarks"));

    remove_all_action->setText(tr("remove all watermarks"));

    QSystemTrayIcon *system_tray = new QSystemTrayIcon();

    //放在托盘提示信息、托盘图标

    system_tray ->setToolTip(QString("我就是托盘"));

    system_tray ->setIcon(QIcon(":/sx1.png"));

    //TrayMenu *tray_menu = new TrayMenu();

    QMenu *remove_menu = new QMenu();

    QAction *remove_selected_action = new QAction(remove_menu);

    QAction *remove_all_action = new QAction(remove_menu);

    remove_menu->addAction(remove_selected_action);

    remove_menu->addAction(remove_all_action);

    remove_selected_action->setText(tr("remove selected watermarks"));

    remove_all_action->setText(tr("remove all watermarks"));

    system_tray->setContextMenu(remove_menu);

    //点击托盘执行的事件

    connect(system_tray , SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(iconIsActived(QSystemTrayIcon::ActivationReason)));

         connect(remove_menu, SIGNAL(showWidget()), this, SLOT(showNormal()));

    //显示托盘

    system_tray->show();

    //托盘显示提示信息

    system_tray->showMessage(QString("托盘标题"), QString("托盘显示内容"));

void Form::closeEvent(QCloseEvent *e)

{

    this->hide();

    e->ignore();

}

void Form::changeEvent(QEvent *e)

{

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

    {

        this->hide();

        e->ignore();

    }

}