/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the Qt Mobility Components. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ #include <QtCore> #include <QtGui> #include <QtNetwork> // QtMobility API headers #include <qmobilityglobal.h> #include <qgeopositioninfosource.h> #include <qgeosatelliteinfosource.h> #include <qnmeapositioninfosource.h> #include <qgeopositioninfo.h> #include <qnetworkconfigmanager.h> #include <qnetworksession.h> #include "satellitedialog.h" #include "connectivityhelper.h" // Use the QtMobility namespace QTM_USE_NAMESPACE #include <math.h> #ifndef M_PI #define M_PI 3.14159265358979323846 #endif // how long (milliseconds) the user need to hold (after a tap on the screen) // before triggering the magnifying glass feature // 701, a prime number, is the sum of 229, 233, 239 // (all three are also prime numbers, consecutive!) #define HOLD_TIME 701 // maximum size of the magnifier // Hint: see above to find why I picked this one :) #define MAX_MAGNIFIER 229 uint qHash(const QPoint& p) { return p.x() * 17 ^ p.y(); } // tile size in pixels const int tdim = 256; QPointF tileForCoordinate(qreal lat, qreal lng, int zoom) { qreal zn = static_cast<qreal>(1 << zoom); qreal tx = (lng + 180.0) / 360.0; qreal ty = (1.0 - log(tan(lat * M_PI / 180.0) + 1.0 / cos(lat * M_PI / 180.0)) / M_PI) / 2.0; return QPointF(tx * zn, ty * zn); } qreal longitudeFromTile(qreal tx, int zoom) { qreal zn = static_cast<qreal>(1 << zoom); qreal lat = tx / zn * 360.0 - 180.0; return lat; } qreal latitudeFromTile(qreal ty, int zoom) { qreal zn = static_cast<qreal>(1 << zoom); qreal n = M_PI - 2 * M_PI * ty / zn; qreal lng = 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n))); return lng; } class SlippyMap: public QObject { Q_OBJECT public: int width; int height; int zoom; qreal latitude; qreal longitude; SlippyMap(QNetworkSession *session, QGeoPositionInfoSource *location, QObject *parent = 0) : QObject(parent), width(400), height(300), zoom(15), latitude(59.9138204), longitude(10.7387413), m_location(location), m_session(session) { m_emptyTile = QPixmap(tdim, tdim); m_emptyTile.fill(Qt::lightGray); m_manager = new QNetworkAccessManager(this); QNetworkDiskCache *cache = new QNetworkDiskCache; cache->setCacheDirectory(QDesktopServices::storageLocation(QDesktopServices::CacheLocation)); m_manager->setCache(cache); connect(m_manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(handleNetworkData(QNetworkReply*))); // Listen gps position changes connect(m_location, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo))); } ~SlippyMap() { for (int i = 0; i < m_pendingReplies.size(); ++i) { delete m_pendingReplies.at(i); } } void invalidate() { if (width <= 0 || height <= 0) return; QPointF ct = tileForCoordinate(latitude, longitude, zoom); qreal tx = ct.x(); qreal ty = ct.y(); // top-left corner of the center tile int xp = width / 2 - (tx - floor(tx)) * tdim; int yp = height / 2 - (ty - floor(ty)) * tdim; // first tile vertical and horizontal int xa = (xp + tdim - 1) / tdim; int ya = (yp + tdim - 1) / tdim; int xs = static_cast<int>(tx) - xa; int ys = static_cast<int>(ty) - ya; // offset for top-left tile m_offset = QPoint(xp - xa * tdim, yp - ya * tdim); // last tile vertical and horizontal int xe = static_cast<int>(tx) + (width - xp - 1) / tdim; int ye = static_cast<int>(ty) + (height - yp - 1) / tdim; // build a rect m_tilesRect = QRect(xs, ys, xe - xs + 1, ye - ys + 1); if (m_url.isEmpty()) download(); emit updated(QRect(0, 0, width, height)); } void render(QPainter *p, const QRect &rect) { for (int x = 0; x <= m_tilesRect.width(); ++x) for (int y = 0; y <= m_tilesRect.height(); ++y) { QPoint tp(x + m_tilesRect.left(), y + m_tilesRect.top()); QRect box = tileRect(tp); if (rect.intersects(box)) { if (m_tilePixmaps.contains(tp)) p->drawPixmap(box, m_tilePixmaps.value(tp)); else p->drawPixmap(box, m_emptyTile); } } } void pan(const QPoint &delta) { QPointF dx = QPointF(delta) / qreal(tdim); QPointF center = tileForCoordinate(latitude, longitude, zoom) - dx; latitude = latitudeFromTile(center.y(), zoom); longitude = longitudeFromTile(center.x(), zoom); invalidate(); } private slots: void positionUpdated(const QGeoPositionInfo &gpsPos) { latitude = gpsPos.coordinate().latitude(); longitude = gpsPos.coordinate().longitude(); invalidate(); } void handleNetworkData(QNetworkReply *reply) { QImage img; QPoint tp = reply->request().attribute(QNetworkRequest::User).toPoint(); QUrl url = reply->url(); if (!reply->error()) if (!img.load(reply, 0)) img = QImage(); m_pendingReplies.removeAll(reply); reply->deleteLater(); m_tilePixmaps[tp] = QPixmap::fromImage(img); if (img.isNull()) m_tilePixmaps[tp] = m_emptyTile; emit updated(tileRect(tp)); // purge unused spaces QRect bound = m_tilesRect.adjusted(-2, -2, 2, 2); foreach(QPoint tp, m_tilePixmaps.keys()) if (!bound.contains(tp)) m_tilePixmaps.remove(tp); download(); } void download() { QPoint grab(0, 0); for (int x = 0; x <= m_tilesRect.width(); ++x) for (int y = 0; y <= m_tilesRect.height(); ++y) { QPoint tp = m_tilesRect.topLeft() + QPoint(x, y); if (!m_tilePixmaps.contains(tp)) { grab = tp; break; } } if (grab == QPoint(0, 0)) { m_url = QUrl(); return; } QString path = "http://tile.openstreetmap.org/%1/%2/%3.png"; m_url = QUrl(path.arg(zoom).arg(grab.x()).arg(grab.y())); QNetworkRequest request; request.setUrl(m_url); request.setRawHeader("User-Agent", "Nokia (Qt) Graphics Dojo 1.0"); request.setAttribute(QNetworkRequest::User, QVariant(grab)); m_pendingReplies << m_manager->get(request); } signals: void updated(const QRect &rect); protected: QRect tileRect(const QPoint &tp) { QPoint t = tp - m_tilesRect.topLeft(); int x = t.x() * tdim + m_offset.x(); int y = t.y() * tdim + m_offset.y(); return QRect(x, y, tdim, tdim); } private: QPoint m_offset; QRect m_tilesRect; QPixmap m_emptyTile; QHash<QPoint, QPixmap> m_tilePixmaps; QNetworkAccessManager *m_manager; QUrl m_url; QGeoPositionInfoSource* m_location; QNetworkSession* m_session; QList<QNetworkReply*> m_pendingReplies; }; class LightMaps: public QWidget { Q_OBJECT public: LightMaps(QWidget *parent = 0) : QWidget(parent), m_normalMap(0), m_largeMap(0), firstLat(0.0), firstLong(0.0), pressed(false), snapped(false), zoomed(false), invert(false), m_usingLogFile(false), m_location(0), waitingForFix(false) { // Set Internet Access Point QNetworkConfigurationManager manager; const bool canStartIAP = (manager.capabilities() & QNetworkConfigurationManager::CanStartAndStopInterfaces); // Is there default access point, use it #ifdef BEARER_IN_QTNETWORK QNetworkConfiguration cfg1 = manager.defaultConfiguration(); if (!cfg1.isValid() || (!canStartIAP && cfg1.state() != QNetworkConfiguration::Active)) { #else QTM_PREPEND_NAMESPACE(QNetworkConfiguration) cfg1 = manager.defaultConfiguration(); if (!cfg1.isValid() || (!canStartIAP && cfg1.state() != QTM_PREPEND_NAMESPACE(QNetworkConfiguration)::Active)) { #endif m_networkSetupError = QString(tr("This example requires networking, and no available networks or access points could be found.")); QTimer::singleShot(0, this, SLOT(networkSetupError())); return; } m_session = new QNetworkSession(cfg1, this); m_connectivityHelper = new ConnectivityHelper(m_session, this); connect(m_session, SIGNAL(opened()), this, SLOT(networkSessionOpened())); connect(m_connectivityHelper, SIGNAL(networkingCancelled()), qApp, SLOT(quit())); m_session->open(); } ~LightMaps() { m_session->close(); if (m_location) m_location->stopUpdates(); } void stopPositioning() { if (m_location) m_location->stopUpdates(); } void startPositioning() { if (m_location) m_location->startUpdates(); } void setCenter(qreal lat, qreal lng) { if (!m_normalMap || !m_largeMap) { firstLat = lat; firstLong = lng; return; } m_normalMap->latitude = lat; m_normalMap->longitude = lng; m_normalMap->invalidate(); m_largeMap->latitude = lat; m_largeMap->longitude = lng; m_largeMap->invalidate(); } public slots: void toggleNightMode() { invert = !invert; update(); } private slots: void networkSetupError() { QMessageBox::critical(this, tr("LightMaps"), m_networkSetupError); QTimer::singleShot(0, qApp, SLOT(quit())); } void networkSessionOpened() { m_location = QGeoPositionInfoSource::createDefaultSource(this); if (!m_location) { QNmeaPositionInfoSource *nmeaLocation = new QNmeaPositionInfoSource(QNmeaPositionInfoSource::SimulationMode, this); QFile *logFile = new QFile(QApplication::applicationDirPath() + QDir::separator() + "nmealog.txt", this); nmeaLocation->setDevice(logFile); m_location = nmeaLocation; m_usingLogFile = true; } m_location->setUpdateInterval(10000); connect(m_location, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo))); if (m_usingLogFile) { QMessageBox::information(this, tr("LightMaps"), tr("No GPS support detected, using GPS data from a sample log file instead.")); } else { waitForFix(); m_location->stopUpdates(); } m_normalMap = new SlippyMap(m_session, m_location, this); m_largeMap = new SlippyMap(m_session, m_location, this); connect(m_normalMap, SIGNAL(updated(QRect)), SLOT(updateMap(QRect))); connect(m_largeMap, SIGNAL(updated(QRect)), SLOT(update())); setCenter(firstLat, firstLong); m_normalMap->width = width(); m_normalMap->height = height(); m_largeMap->width = m_normalMap->width * 2; m_largeMap->height = m_normalMap->height * 2; connect(m_location, SIGNAL(updateTimeout()), this, SLOT(waitForFix())); startPositioning(); } // Brings up a satellite strength dialog box until a position fix is received. // This will also start the position updates if they are not already started. void waitForFix() { if (waitingForFix) return; waitingForFix = true; QGeoSatelliteInfoSource *m_satellite = QGeoSatelliteInfoSource::createDefaultSource(this); if (m_satellite) { SatelliteDialog *dialog = new SatelliteDialog(this, 30, SatelliteDialog::ExitOnFixOrCancel, SatelliteDialog::OrderByPrnNumber, SatelliteDialog::ScaleToMaxPossible); dialog->connectSources(m_location, m_satellite); m_location->startUpdates(); m_satellite->startUpdates(); dialog->exec(); m_satellite->stopUpdates(); delete dialog; delete m_satellite; } waitingForFix = false; } void positionUpdated(const QGeoPositionInfo &pos) { setCenter(pos.coordinate().latitude(), pos.coordinate().longitude()); } void updateMap(const QRect &r) { update(r); } protected: void activateZoom() { stopPositioning(); zoomed = true; tapTimer.stop(); m_largeMap->zoom = m_normalMap->zoom + 1; m_largeMap->width = m_normalMap->width * 2; m_largeMap->height = m_normalMap->height * 2; m_largeMap->latitude = m_normalMap->latitude; m_largeMap->longitude = m_normalMap->longitude; m_largeMap->invalidate(); update(); } void resizeEvent(QResizeEvent *) { if (!m_normalMap || !m_largeMap) return; m_normalMap->width = width(); m_normalMap->height = height(); m_normalMap->invalidate(); m_largeMap->width = m_normalMap->width * 2; m_largeMap->height = m_normalMap->height * 2; m_largeMap->invalidate(); } void paintEvent(QPaintEvent *event) { if (!m_normalMap || !m_largeMap) return; QPainter p; p.begin(this); m_normalMap->render(&p, event->rect()); p.setPen(Qt::black); #if defined(Q_OS_SYMBIAN) QFont font = p.font(); font.setPixelSize(13); p.setFont(font); #endif p.drawText(rect(), Qt::AlignBottom | Qt::TextWordWrap, "Map data CCBYSA 2009 OpenStreetMap.org contributors"); p.end(); if (zoomed) { int dim = qMin(width(), height()); int magnifierSize = qMin(MAX_MAGNIFIER, dim * 2 / 3); int radius = magnifierSize / 2; int ring = radius - 15; QSize box = QSize(magnifierSize, magnifierSize); // reupdate our mask if (maskPixmap.size() != box) { maskPixmap = QPixmap(box); maskPixmap.fill(Qt::transparent); QRadialGradient g; g.setCenter(radius, radius); g.setFocalPoint(radius, radius); g.setRadius(radius); g.setColorAt(1.0, QColor(255, 255, 255, 0)); g.setColorAt(0.5, QColor(128, 128, 128, 255)); QPainter mask(&maskPixmap); mask.setRenderHint(QPainter::Antialiasing); mask.setCompositionMode(QPainter::CompositionMode_Source); mask.setBrush(g); mask.setPen(Qt::NoPen); mask.drawRect(maskPixmap.rect()); mask.setBrush(QColor(Qt::transparent)); mask.drawEllipse(g.center(), ring, ring); mask.end(); } QPoint center = dragPos - QPoint(0, radius); center = center + QPoint(0, radius / 2); QPoint corner = center - QPoint(radius, radius); magnifierPos = center; QPoint xy = center * 2 - QPoint(radius, radius); // only set the dimension to the magnified portion if (zoomPixmap.size() != box) { zoomPixmap = QPixmap(box); zoomPixmap.fill(Qt::lightGray); } if (true) { QPainter p(&zoomPixmap); p.translate(-xy); m_largeMap->render(&p, QRect(xy, box)); p.end(); } QPainterPath clipPath; clipPath.addEllipse(center, ring, ring); QPainter p(this); p.setRenderHint(QPainter::Antialiasing); p.setClipPath(clipPath); p.drawPixmap(corner, zoomPixmap); p.setClipping(false); p.drawPixmap(corner, maskPixmap); p.setPen(Qt::gray); p.drawPath(clipPath); } if (invert) { QPainter p(this); p.setCompositionMode(QPainter::CompositionMode_Difference); p.fillRect(event->rect(), Qt::white); p.end(); } } void timerEvent(QTimerEvent *) { if (!zoomed) activateZoom(); update(); } void mousePressEvent(QMouseEvent *event) { if (!m_normalMap || !m_largeMap) return; if (event->buttons() != Qt::LeftButton) return; pressed = snapped = true; pressPos = dragPos = event->pos(); tapTimer.stop(); tapTimer.start(HOLD_TIME, this); if (zoomed) { QPoint distance = dragPos - magnifierPos; int magnifierSize = qMin(MAX_MAGNIFIER, (qMin(width(), height()) * 2) / 3); int radius = magnifierSize / 2; if (distance.manhattanLength() > radius) { zoomed = false; tapTimer.stop(); } } } void mouseMoveEvent(QMouseEvent *event) { if (!m_normalMap || !m_largeMap) return; if (!event->buttons()) return; stopPositioning(); if (!zoomed) { if (!pressed || !snapped) { QPoint delta = event->pos() - pressPos; pressPos = event->pos(); m_normalMap->pan(delta); return; } else { const int threshold = 10; QPoint delta = event->pos() - pressPos; if (snapped) { snapped &= delta.x() < threshold; snapped &= delta.y() < threshold; snapped &= delta.x() > -threshold; snapped &= delta.y() > -threshold; } if (!snapped) tapTimer.stop(); } } else { dragPos = event->pos(); update(); } } void mouseReleaseEvent(QMouseEvent *) { if (!m_normalMap || !m_largeMap) return; zoomed = false; update(); } void keyPressEvent(QKeyEvent *event) { if (!m_normalMap || !m_largeMap) return; if (!zoomed) { if (event->key() == Qt::Key_Left) m_normalMap->pan(QPoint(20, 0)); if (event->key() == Qt::Key_Right) m_normalMap->pan(QPoint(-20, 0)); if (event->key() == Qt::Key_Up) m_normalMap->pan(QPoint(0, 20)); if (event->key() == Qt::Key_Down) m_normalMap->pan(QPoint(0, -20)); if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) { dragPos = QPoint(width() / 2, height() / 2); activateZoom(); } } else { if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) { zoomed = false; update(); } QPoint delta(0, 0); if (event->key() == Qt::Key_Left) delta = QPoint(-15, 0); if (event->key() == Qt::Key_Right) delta = QPoint(15, 0); if (event->key() == Qt::Key_Up) delta = QPoint(0, -15); if (event->key() == Qt::Key_Down) delta = QPoint(0, 15); if (delta != QPoint(0, 0)) { dragPos += delta; update(); } } } private: QString m_networkSetupError; SlippyMap *m_normalMap; SlippyMap *m_largeMap; qreal firstLat; qreal firstLong; bool pressed; bool snapped; QPoint pressPos; QPoint dragPos; QPoint magnifierPos; QBasicTimer tapTimer; bool zoomed; QPixmap zoomPixmap; QPixmap maskPixmap; bool invert; bool m_usingLogFile; QGeoPositionInfoSource *m_location; bool waitingForFix; QNetworkSession *m_session; ConnectivityHelper *m_connectivityHelper; }; class MapZoom: public QMainWindow { Q_OBJECT private: LightMaps *map; public: MapZoom() : QMainWindow(0) { map = new LightMaps(this); setCentralWidget(map); map->setFocus(); QAction *gpsAction = new QAction("Start GPS", this); QAction *osloAction = new QAction("&Oslo", this); QAction *berlinAction = new QAction("&Berlin", this); QAction *jakartaAction = new QAction("&Jakarta", this); QAction *nightModeAction = new QAction("Night Mode", this); nightModeAction->setCheckable(true); nightModeAction->setChecked(false); QAction *osmAction = new QAction("About OpenStreetMap", this); connect(gpsAction, SIGNAL(triggered()), SLOT(chooseGps())); connect(osloAction, SIGNAL(triggered()), SLOT(chooseOslo())); connect(berlinAction, SIGNAL(triggered()), SLOT(chooseBerlin())); connect(jakartaAction, SIGNAL(triggered()), SLOT(chooseJakarta())); connect(nightModeAction, SIGNAL(triggered()), map, SLOT(toggleNightMode())); connect(osmAction, SIGNAL(triggered()), SLOT(aboutOsm())); #if defined(Q_OS_SYMBIAN) || defined(Q_OS_WINCE_WM) || defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6) menuBar()->addAction(gpsAction); menuBar()->addAction(osloAction); menuBar()->addAction(berlinAction); menuBar()->addAction(jakartaAction); menuBar()->addAction(nightModeAction); menuBar()->addAction(osmAction); #else QMenu *menu = menuBar()->addMenu("&Options"); menu->addAction(gpsAction); menu->addAction(osloAction); menu->addAction(berlinAction); menu->addAction(jakartaAction); menu->addSeparator(); menu->addAction(nightModeAction); menu->addAction(osmAction); #endif #if defined(Q_OS_WINCE) QAction *exitAction = new QAction("Exit", this); connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit())); menuBar()->addAction(exitAction); #endif } private slots: void chooseGps() { map->startPositioning(); } void chooseOslo() { map->stopPositioning(); map->setCenter(59.9138204, 10.7387413); } void chooseBerlin() { map->stopPositioning(); map->setCenter(52.52958999943302, 13.383053541183472); } void chooseJakarta() { map->stopPositioning(); map->setCenter(-6.211544, 106.845172); } void aboutOsm() { QDesktopServices::openUrl(QUrl("http://www.openstreetmap.org")); } }; #include "lightmaps.moc" int main(int argc, char **argv) { #if defined(Q_WS_X11) QApplication::setGraphicsSystem("raster"); #endif QApplication app(argc, argv); app.setApplicationName("LightMaps"); MapZoom w; w.setWindowTitle("OpenStreetMap"); #if defined(Q_OS_SYMBIAN) || defined(Q_OS_WINCE_WM) || defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6) w.showMaximized(); #else w.resize(600, 450); w.show(); #endif return app.exec(); }
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