是否可以在Qt Quick应用程序中实现SystemTrayIcon功能

Question

我正在写一个QtQuick桌面应用程序.我在其中使用c ++(用于功能)和QML(用于UI).我使用QQuickView来显示用QML编写的界面.

我希望此应用程序在最小化时驻留在系统托盘中.

我的意思是类似于这个例子的功能.http://qt-project.org/doc/qt-4.8/desktop-systray.html.我正在尝试实现此功能,但在我的Qt Quick应用程序中找不到这样做的方法.

这是我的main.cpp代码:

#include <QGuiApplication>
#include <QQmlEngine>
#include <QQmlContext>
#include <QQmlFileSelector>
#include <QQuickView>
#include "myapp.h"

int main(int argc, char* argv[])
{
    QGuiApplication app(argc,argv);
    app.setApplicationName(QFileInfo(app.applicationFilePath()).baseName());
    QDir::setCurrent(qApp->applicationDirPath());

    MyApp myappObject;

    QQuickView view;

    view.connect(view.engine(), SIGNAL(quit()), &app, SLOT(quit()));
    view.rootContext()->setContextProperty("myappObject", &myappObject);
    new QQmlFileSelector(view.engine(), &view);

    view.setSource(QUrl("qrc:///myapp.qml"));

    view.setResizeMode(QQuickView::SizeRootObjectToView);   
    view.show();

    return app.exec();
}

请提供任何提示/指示来帮助您做到这一点.

谢谢.

Answer 1

我今天面临同样的挑战,最终在main()中使用了以下解决方案.使用Qt 5.3时,对我来说很有用.您当然应该实现一种更好的方法来检查第一个根对象是否是您的应用程序窗口对象.

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QMessageBox>
#include <QAction>
#include <QMenu>
#include <QSystemTrayIcon>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    if (!QSystemTrayIcon::isSystemTrayAvailable()) {
        QMessageBox::critical(0, QObject::tr("Systray"),
                                 QObject::tr("I couldn't detect any system tray "
                                             "on this system."));
        return 1;
    }
    QApplication::setQuitOnLastWindowClosed(false);

    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:///main.qml")));

    QObject *root = 0;
    if (engine.rootObjects().size() > 0)
    {
        root = engine.rootObjects().at(0);

        QAction *minimizeAction = new QAction(QObject::tr("Mi&nimize"), root);
        root->connect(minimizeAction, SIGNAL(triggered()), root, SLOT(hide()));
        QAction *maximizeAction = new QAction(QObject::tr("Ma&ximize"), root);
        root->connect(maximizeAction, SIGNAL(triggered()), root, SLOT(showMaximized()));
        QAction *restoreAction = new QAction(QObject::tr("&Restore"), root);
        root->connect(restoreAction, SIGNAL(triggered()), root, SLOT(showNormal()));
        QAction *quitAction = new QAction(QObject::tr("&Quit"), root);
        root->connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));

        QMenu *trayIconMenu = new QMenu();
        trayIconMenu->addAction(minimizeAction);
        trayIconMenu->addAction(maximizeAction);
        trayIconMenu->addAction(restoreAction);
        trayIconMenu->addSeparator();
        trayIconMenu->addAction(quitAction);

        QSystemTrayIcon *trayIcon = new QSystemTrayIcon(root);
        trayIcon->setContextMenu(trayIconMenu);
        trayIcon->setIcon(QIcon(":/resources/DatagnanLogoColor.png"));
        trayIcon->show();
    }

    return app.exec();
}

Answer 2

将 Windows 类 (window.cpp/window.h) 从系统托盘示例复制到您的项目，如有必要，将其移植到 Qt5 并从主文件中打开这两个类：

int main(int argc, char* argv[])
{
    // ...
    QQuickView view;
    // ... 
    view.show();

    Window window;
    window.show();

    return app.exec();
}