cloud.cpp Example File
network/bearercloud/cloud.cpp
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#include "cloud.h"
#include "bearercloud.h"
#include <qnetworksession.h>
#include <QGraphicsTextItem>
#include <QGraphicsSvgItem>
#include <QGraphicsSceneMouseEvent>
#include <QSvgRenderer>
#include <QPainter>
#include <QDebug>
#include <math.h>
static QMap<QNetworkConfiguration::BearerType, QSvgRenderer *> svgCache;
Cloud::Cloud(const QNetworkConfiguration &config, QGraphicsItem *parent)
: QGraphicsItem(parent), configuration(config), deleteAfterAnimation(false)
{
session = new QNetworkSession(configuration, this);
connect(session, SIGNAL(newConfigurationActivated()),
this, SLOT(newConfigurationActivated()));
connect(session, SIGNAL(stateChanged(QNetworkSession::State)),
this, SLOT(stateChanged(QNetworkSession::State)));
setFlag(ItemIsMovable);
#if (QT_VERSION >= QT_VERSION_CHECK(4, 6, 0))
setFlag(ItemSendsGeometryChanges);
#endif
setZValue(1);
icon = new QGraphicsSvgItem(this);
text = new QGraphicsTextItem(this);
currentScale = 0;
finalScale = 1;
setTransform(QTransform::fromScale(currentScale, currentScale), false);
setOpacity(0);
newConfigurationActivated();
}
Cloud::~Cloud()
{
}
void Cloud::setFinalScale(qreal factor)
{
finalScale = factor;
}
void Cloud::setDeleteAfterAnimation(bool deleteAfter)
{
deleteAfterAnimation = deleteAfter;
}
void Cloud::calculateForces()
{
if (!scene() || scene()->mouseGrabberItem() == this) {
newPos = pos();
return;
}
// sum up all the forces push this item away
qreal xvel = 0;
qreal yvel = 0;
QLineF orbitForce;
foreach (QGraphicsItem *item, scene()->items()) {
// other clouds
Cloud *cloud = qgraphicsitem_cast<Cloud *>(item);
if (!cloud && item->data(0) != QLatin1String("This Device"))
continue;
qreal factor = 1.0;
QLineF line(cloud ? item->mapToScene(0, 0) : QPointF(0, 0), mapToScene(0, 0));
if (item->data(0) == QLatin1String("This Device"))
orbitForce = line;
if (cloud)
factor = cloud->currentScale;
qreal dx = line.dx();
qreal dy = line.dy();
double l = 2.0 * (dx * dx + dy * dy);
if (l > 0) {
xvel += factor * dx * 200.0 / l;
yvel += factor * dy * 200.0 / l;
}
}
// tendency to stay at a fixed orbit
qreal orbit = getRadiusForState(configuration.state());
qreal distance = orbitForce.length();
QLineF unit = orbitForce.unitVector();
orbitForce.setLength(xvel * unit.dx() + yvel * unit.dy());
qreal w = 2 - exp(-pow(distance-orbit, 2)/(2 * 50));
if (distance < orbit) {
xvel += orbitForce.dx() * w;
yvel += orbitForce.dy() * w;
} else {
xvel -= orbitForce.dx() * w;
yvel -= orbitForce.dy() * w;
}
if (qAbs(xvel) < 0.1 && qAbs(yvel) < 0.1)
xvel = yvel = 0;
QRectF sceneRect = scene()->sceneRect();
newPos = pos() + QPointF(xvel, yvel);
newPos.setX(qMin(qMax(newPos.x(), sceneRect.left() + 10), sceneRect.right() - 10));
newPos.setY(qMin(qMax(newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10));
}
bool Cloud::advance()
{
static const qreal scaleDelta = 0.01;
bool animated = false;
if (currentScale < finalScale) {
animated = true;
currentScale = qMin<qreal>(currentScale + scaleDelta, finalScale);
setTransform(QTransform::fromScale(currentScale, currentScale), false);
} else if (currentScale > finalScale) {
animated = true;
currentScale = qMax<qreal>(currentScale - scaleDelta, finalScale);
setTransform(QTransform::fromScale(currentScale, currentScale), false);
}
if (newPos != pos()) {
setPos(newPos);
animated = true;
}
if (opacity() != finalOpacity) {
animated = true;
if (qAbs(finalScale - currentScale) > 0.0) {
// use scale as reference
setOpacity(opacity() + scaleDelta * (finalOpacity - opacity()) /
qAbs(finalScale - currentScale));
} else {
setOpacity(finalOpacity);
}
}
if (!animated && deleteAfterAnimation)
deleteLater();
return animated;
}
QRectF Cloud::boundingRect() const
{
return childrenBoundingRect();
}
void Cloud::paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *)
{
}
QVariant Cloud::itemChange(GraphicsItemChange change, const QVariant &value)
{
switch (change) {
case ItemPositionHasChanged:
if (BearerCloud *bearercloud = qobject_cast<BearerCloud *>(scene()))
bearercloud->cloudMoved();
default:
;
};
return QGraphicsItem::itemChange(change, value);
}
void Cloud::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
if (session->isOpen())
session->close();
else
session->open();
event->accept();
}
}
void Cloud::stateChanged(QNetworkSession::State state)
{
if (configuration.name().isEmpty())
finalOpacity = qreal(0.1);
else if (session->state() == QNetworkSession::NotAvailable)
finalOpacity = 0.5;
else
finalOpacity = 1.0;
#if !defined(Q_WS_MAEMO_5) && !defined(Q_WS_MAEMO_6) && \
!defined(Q_OS_SYMBIAN) && !defined(Q_OS_WINCE)
QString tooltip;
if (configuration.name().isEmpty())
tooltip += tr("<b>HIDDEN NETWORK</b><br>");
else
tooltip += tr("<b>%1</b><br>").arg(configuration.name());
#ifndef QT_NO_NETWORKINTERFACE
const QNetworkInterface interface = session->interface();
if (interface.isValid())
tooltip += tr("<br>Interface: %1").arg(interface.humanReadableName());
tooltip += tr("<br>Id: %1").arg(configuration.identifier());
#endif
const QString bearerTypeName = configuration.bearerTypeName();
if (!bearerTypeName.isEmpty())
tooltip += tr("<br>Bearer: %1").arg(bearerTypeName);
QString s = tr("<br>State: %1 (%2)");
switch (state) {
case QNetworkSession::Invalid:
s = s.arg(tr("Invalid"));
break;
case QNetworkSession::NotAvailable:
s = s.arg(tr("Not Available"));
break;
case QNetworkSession::Connecting:
s = s.arg(tr("Connecting"));
break;
case QNetworkSession::Connected:
s = s.arg(tr("Connected"));
break;
case QNetworkSession::Closing:
s = s.arg(tr("Closing"));
break;
case QNetworkSession::Disconnected:
s = s.arg(tr("Disconnected"));
break;
case QNetworkSession::Roaming:
s = s.arg(tr("Roaming"));
break;
default:
s = s.arg(tr("Unknown"));
}
if (session->isOpen())
s = s.arg(tr("Open"));
else
s = s.arg(tr("Closed"));
tooltip += s;
tooltip += tr("<br><br>Active time: %1 seconds").arg(session->activeTime());
tooltip += tr("<br>Received data: %1 bytes").arg(session->bytesReceived());
tooltip += tr("<br>Sent data: %1 bytes").arg(session->bytesWritten());
setToolTip(tooltip);
#else
Q_UNUSED(state);
#endif
}
void Cloud::newConfigurationActivated()
{
QNetworkConfiguration::BearerType bearerType = configuration.bearerType();
if (!svgCache.contains(bearerType)) {
QSvgRenderer *renderer = 0;
switch (bearerType) {
case QNetworkConfiguration::BearerWLAN:
renderer = new QSvgRenderer(QLatin1String(":wlan.svg"));
break;
case QNetworkConfiguration::BearerEthernet:
renderer = new QSvgRenderer(QLatin1String(":lan.svg"));
break;
case QNetworkConfiguration::Bearer2G:
renderer = new QSvgRenderer(QLatin1String(":cell.svg"));
break;
case QNetworkConfiguration::BearerBluetooth:
renderer = new QSvgRenderer(QLatin1String(":bluetooth.svg"));
break;
case QNetworkConfiguration::BearerCDMA2000:
case QNetworkConfiguration::BearerWCDMA:
case QNetworkConfiguration::BearerHSPA:
renderer = new QSvgRenderer(QLatin1String(":umts.svg"));
break;
default:
renderer = new QSvgRenderer(QLatin1String(":unknown.svg"));
}
if (renderer)
svgCache.insert(bearerType, renderer);
}
icon->setSharedRenderer(svgCache[bearerType]);
if (configuration.name().isEmpty()) {
text->setPlainText(tr("HIDDEN NETWORK"));
} else {
if (configuration.type() == QNetworkConfiguration::ServiceNetwork)
text->setHtml("<b>" + configuration.name() + "</b>");
else
text->setPlainText(configuration.name());
}
const qreal height = icon->boundingRect().height() + text->boundingRect().height();
icon->setPos(icon->boundingRect().width() / -2, height / -2);
text->setPos(text->boundingRect().width() / -2,
height / 2 - text->boundingRect().height());
stateChanged(session->state());
}
qreal Cloud::getRadiusForState(QNetworkConfiguration::StateFlags state)
{
switch (state) {
case QNetworkConfiguration::Active:
return 100;
break;
case QNetworkConfiguration::Discovered:
return 150;
break;
case QNetworkConfiguration::Defined:
return 200;
break;
case QNetworkConfiguration::Undefined:
return 250;
break;
default:
return 300;
}
}
