Explaining code of presenterplugin.cpp

presenterplugin.cpp

PresenterPlugin::PresenterPlugin(QObject *parent, const QVariantList &args)
    : KdeConnectPlugin(parent, args)
    , m_view(nullptr)
    , m_timer(new QTimer(this))
{
    m_timer->setInterval(500);
    m_timer->setSingleShot(true);
}

Constructs a presenter plugin object and sets up a timer.

PresenterPlugin::~PresenterPlugin()
{
}

This implements the presenter plugin interface.

bool PresenterPlugin::receivePacket(const NetworkPacket &np)
{
    if (np.get(QStringLiteral("stop"), false)) {
        delete m_view;
        m_view = nullptr;
        return true;
    }

    if (!m_view) {
        m_view = new PresenterView;
        m_xPos = 0.5f;
        m_yPos = 0.5f;
        m_view->showFullScreen();
        connect(this, &QObject::destroyed, m_view, &QObject::deleteLater);
        connect(m_timer, &QTimer::timeout, m_view, &QObject::deleteLater);
    }

    QSize screenSize = m_view->screen()->size();
    float ratio = float(screenSize.width()) / screenSize.height();

    m_xPos += np.get(QStringLiteral("dx"));
    m_yPos += np.get(QStringLiteral("dy")) * ratio;
    m_xPos = qBound(0.f, m_xPos, 1.f);
    m_yPos = qBound(0.f, m_yPos, 1.f);

    m_timer->start();

    QQuickItem *object = m_view->rootObject();
    object->setProperty("xPos", m_xPos);
    object->setProperty("yPos", m_yPos);
    return true;
}

This retrieves the coordinates of a network package from the internal list. It creates a presenter view if it doesn't exist, and sets the x and y positions of the objects in the view. It also starts a timer to track the change in the network package. It returns true on the first successful attempt.