bearercloud.cpp Example File
bearercloud/bearercloud.cpp

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    #include "bearercloud.h"
    #include "cloud.h"

    #include <QGraphicsTextItem>
    #include <QTimer>
    #include <QDateTime>
    #include <QHostInfo>

    #include <QDebug>

    #include <math.h>

    #ifndef M_PI
    #define M_PI 3.14159265358979323846
    #endif

    BearerCloud::BearerCloud(QObject *parent)
    :   QGraphicsScene(parent), timerId(0)
    {
        setSceneRect(-300, -300, 600, 600);

        qsrand(QDateTime::currentDateTime().toTime_t());

        offset[QNetworkConfiguration::Active] = 2 * M_PI * qrand() / RAND_MAX;
        offset[QNetworkConfiguration::Discovered] = offset[QNetworkConfiguration::Active] + M_PI / 6;
        offset[QNetworkConfiguration::Defined] = offset[QNetworkConfiguration::Discovered] - M_PI / 6;
        offset[QNetworkConfiguration::Undefined] = offset[QNetworkConfiguration::Undefined] + M_PI / 6;

        thisDevice = new QGraphicsTextItem(QHostInfo::localHostName());
        thisDevice->setData(0, QLatin1String("This Device"));
        thisDevice->setPos(thisDevice->boundingRect().width() / -2,
                           thisDevice->boundingRect().height() / -2);
        addItem(thisDevice);

        qreal radius = Cloud::getRadiusForState(QNetworkConfiguration::Active);
        QGraphicsEllipseItem *orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);
        orbit->setPen(QColor(Qt::green));
        addItem(orbit);
        radius = Cloud::getRadiusForState(QNetworkConfiguration::Discovered);
        orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);
        orbit->setPen(QColor(Qt::blue));
        addItem(orbit);
        radius = Cloud::getRadiusForState(QNetworkConfiguration::Defined);
        orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);
        orbit->setPen(QColor(Qt::darkGray));
        addItem(orbit);
        radius = Cloud::getRadiusForState(QNetworkConfiguration::Undefined);
        orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);
        orbit->setPen(QColor(Qt::lightGray));
        addItem(orbit);

        connect(&manager, SIGNAL(configurationAdded(QNetworkConfiguration)),
                this, SLOT(configurationAdded(QNetworkConfiguration)));
        connect(&manager, SIGNAL(configurationRemoved(QNetworkConfiguration)),
                this, SLOT(configurationRemoved(QNetworkConfiguration)));
        connect(&manager, SIGNAL(configurationChanged(QNetworkConfiguration)),
                this, SLOT(configurationChanged(QNetworkConfiguration)));

        QTimer::singleShot(0, this, SLOT(updateConfigurations()));
    }

    BearerCloud::~BearerCloud()
    {
    }

    void BearerCloud::cloudMoved()
    {
        if (!timerId)
            timerId = startTimer(1000 / 25);
    }

    void BearerCloud::timerEvent(QTimerEvent *)
    {
        QList<Cloud *> clouds;
        foreach (QGraphicsItem *item, items()) {
            if (Cloud *cloud = qgraphicsitem_cast<Cloud *>(item))
                clouds << cloud;
        }

        foreach (Cloud *cloud, clouds)
            cloud->calculateForces();

        bool cloudsMoved = false;
        foreach (Cloud *cloud, clouds)
            cloudsMoved |= cloud->advance();

        if (!cloudsMoved) {
            killTimer(timerId);
            timerId = 0;
        }
    }

    void BearerCloud::configurationAdded(const QNetworkConfiguration &config)
    {
        const QNetworkConfiguration::StateFlags state = config.state();

        configStates.insert(state, config.identifier());

        const qreal radius = Cloud::getRadiusForState(state);
        const int count = configStates.count(state);
        const qreal angle = 2 * M_PI / count;

        Cloud *item = new Cloud(config);
        configurations.insert(config.identifier(), item);

        item->setPos(radius * cos((count-1) * angle + offset[state]),
                     radius * sin((count-1) * angle + offset[state]));

        addItem(item);

        cloudMoved();
    }

    void BearerCloud::configurationRemoved(const QNetworkConfiguration &config)
    {
        foreach (const QNetworkConfiguration::StateFlags &state, configStates.uniqueKeys())
            configStates.remove(state, config.identifier());

        Cloud *item = configurations.take(config.identifier());

        item->setFinalScale(0.0);
        item->setDeleteAfterAnimation(true);

        cloudMoved();
    }

    void BearerCloud::configurationChanged(const QNetworkConfiguration &config)
    {
        foreach (const QNetworkConfiguration::StateFlags &state, configStates.uniqueKeys())
            configStates.remove(state, config.identifier());

        configStates.insert(config.state(), config.identifier());

        cloudMoved();
    }

    void BearerCloud::updateConfigurations()
    {
        QList<QNetworkConfiguration> allConfigurations = manager.allConfigurations();

        while (!allConfigurations.isEmpty())
            configurationAdded(allConfigurations.takeFirst());

        cloudMoved();
    }