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Diffstat (limited to 'examples/network/bearercloud/cloud.cpp')
| -rw-r--r-- | examples/network/bearercloud/cloud.cpp | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/examples/network/bearercloud/cloud.cpp b/examples/network/bearercloud/cloud.cpp new file mode 100644 index 0000000..81e13a6 --- /dev/null +++ b/examples/network/bearercloud/cloud.cpp @@ -0,0 +1,361 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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<QString, QSvgRenderer *> svgCache; + +//! [0] +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(); +} +//! [0] + +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 *) +{ +} + +//! [4] +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); +} +//! [4] + +//! [3] +void Cloud::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) +{ + if (event->button() == Qt::LeftButton) { + if (session->isOpen()) + session->close(); + else + session->open(); + + event->accept(); + } +} +//! [3] + +//! [2] +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; + + QString tooltip; + + if (configuration.name().isEmpty()) + tooltip += tr("<b>HIDDEN NETWORK</b><br>"); + else + tooltip += tr("<b>%1</b><br>").arg(configuration.name()); + + const QNetworkInterface interface = session->interface(); + if (interface.isValid()) + tooltip += tr("<br>Interface: %1").arg(interface.humanReadableName()); + tooltip += tr("<br>Id: %1").arg(configuration.identifier()); + + const QString bearerName = configuration.bearerName(); + if (!bearerName.isEmpty()) + tooltip += tr("<br>Bearer: %1").arg(bearerName); + + 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); +} +//! [2] + +//! [1] +void Cloud::newConfigurationActivated() +{ + const QString bearerName = configuration.bearerName(); + if (!svgCache.contains(bearerName)) { + if (bearerName == QLatin1String("WLAN")) + svgCache.insert(bearerName, new QSvgRenderer(QLatin1String(":wlan.svg"))); + else if (bearerName == QLatin1String("Ethernet")) + svgCache.insert(bearerName, new QSvgRenderer(QLatin1String(":lan.svg"))); + else + svgCache.insert(bearerName, new QSvgRenderer(QLatin1String(":unknown.svg"))); + } + + icon->setSharedRenderer(svgCache[bearerName]); + + 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()); +} +//! [1] + +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; + } +} + |