bearercloud.cpp Example File

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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();
}