C++Qt windows系统托盘增加图标和功能

#include <QApplication>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QMainWindow>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    // 创建主窗口
    QMainWindow mainWindow;
    mainWindow.setWindowTitle("My Application");
    mainWindow.resize(640, 480);
    // 创建系统托盘图标
    QSystemTrayIcon* trayIcon = new QSystemTrayIcon();
    trayIcon->setIcon(QIcon(":/icon.png")); // 设置图标
    trayIcon->setVisible(true);
    // 创建菜单
    QMenu* menu = new QMenu();
    QAction* showAction = new QAction("显示窗口", menu);
    QAction* hideAction = new QAction("隐藏窗口", menu);
    QAction* quitAction = new QAction("退出", menu);
    menu->addAction(showAction);
    menu->addAction(hideAction);
    menu->addSeparator();
    menu->addAction(quitAction);
    // 将菜单添加到系统托盘图标中
    trayIcon->setContextMenu(menu);
    // 监听系统托盘图标的activated信号
    QObject::connect(trayIcon, &QSystemTrayIcon::activated, [&mainWindow](QSystemTrayIcon::ActivationReason reason){
        if(reason == QSystemTrayIcon::Trigger){ // 判断是否是单击事件
            if(mainWindow.isHidden()){ // 如果主窗口是隐藏的，则显示它
                mainWindow.show();
            }else{ // 如果主窗口是显示的，则隐藏它
                mainWindow.hide();
            }
        }
    });
    // 监听菜单动作的triggered信号
    QObject::connect(showAction, &QAction::triggered, &mainWindow, &QMainWindow::show);
    QObject::connect(hideAction, &QAction::triggered, &mainWindow, &QMainWindow::hide);
    QObject::connect(quitAction, &QAction::triggered, &a, &QApplication::quit);
    return a.exec();
}