2 Situare - A location system for Facebook
3 Copyright (C) 2010 Ixonos Plc. Authors:
5 Sami Rämö - sami.ramo@ixonos.com
6 Jussi Laitinen - jussi.laitinen@ixonos.com
7 Pekka Nissinen - pekka.nissinen@ixonos.com
8 Ville Tiensuu - ville.tiensuu@ixonos.com
10 Situare is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License
12 version 2 as published by the Free Software Foundation.
14 Situare is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with Situare; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
25 #include <QtAlgorithms>
28 #include <QStringList>
31 #include <QHashIterator>
35 #include "frienditemshandler.h"
36 #include "gpslocationitem.h"
37 #include "mapcommon.h"
38 #include "mapfetcher.h"
41 #include "ownlocationitem.h"
43 #include "mapengine.h"
44 #include "network/networkaccessmanager.h"
46 MapEngine::MapEngine(QObject *parent)
48 m_autoCenteringEnabled(false),
50 m_zoomLevel(DEFAULT_ZOOM_LEVEL),
51 m_centerTile(QPoint(UNDEFINED, UNDEFINED)),
52 m_lastManualPosition(QPoint(0, 0)),
53 m_viewSize(QSize(DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT))
55 qDebug() << __PRETTY_FUNCTION__;
57 m_mapScene = new MapScene(this);
59 m_mapFetcher = new MapFetcher(NetworkAccessManager::instance(), this);
60 connect(this, SIGNAL(fetchImage(int, int, int)),
61 m_mapFetcher, SLOT(enqueueFetchMapImage(int, int, int)));
62 connect(m_mapFetcher, SIGNAL(mapImageReceived(int, int, int, QPixmap)),
63 this, SLOT(mapImageReceived(int, int, int, QPixmap)));
65 m_ownLocation = new OwnLocationItem();
66 m_ownLocation->hide(); // hide until first location info is received
67 m_mapScene->addItem(m_ownLocation);
69 m_gpsLocationItem = new GPSLocationItem();
70 m_mapScene->addItem(m_gpsLocationItem);
72 m_friendItemsHandler = new FriendItemsHandler(m_mapScene, this);
73 connect(this, SIGNAL(zoomLevelChanged(int)),
74 m_friendItemsHandler, SLOT(refactorFriendItems(int)));
76 connect(this, SIGNAL(friendsLocationsReady(QList<User*>&)),
77 m_friendItemsHandler, SLOT(friendListUpdated(QList<User*>&)));
79 connect(m_friendItemsHandler, SIGNAL(locationItemClicked(QList<QString>)),
80 this, SIGNAL(locationItemClicked(QList<QString>)));
83 MapEngine::~MapEngine()
85 qDebug() << __PRETTY_FUNCTION__;
87 QSettings settings(DIRECTORY_NAME, FILE_NAME);
88 settings.setValue(MAP_LAST_POSITION,
89 convertSceneCoordinateToLatLon(m_zoomLevel, m_sceneCoordinate));
90 settings.setValue(MAP_LAST_ZOOMLEVEL, m_zoomLevel);
93 QRect MapEngine::calculateTileGrid(QPoint sceneCoordinate)
95 qDebug() << __PRETTY_FUNCTION__;
97 int padding = GRID_PADDING;
101 QPoint tileCoordinate = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
102 int gridWidth = (m_viewSize.width() / TILE_SIZE_X + 1) + (padding * 2);
103 int gridHeight = (m_viewSize.height() / TILE_SIZE_Y + 1) + (padding * 2);
104 int topLeftX = tileCoordinate.x() - (gridWidth / 2);
105 int topLeftY = tileCoordinate.y() - (gridHeight / 2);
107 m_mapFetcher->setDownloadQueueSize(gridWidth * gridHeight);
109 // qWarning() << __PRETTY_FUNCTION__ << topLeftX << topLeftY << "->"
110 // << topLeftX + gridWidth << topLeftY + gridHeight;
112 return QRect(topLeftX, topLeftY, gridWidth, gridHeight);
115 QPointF MapEngine::centerGeoCoordinate()
117 qDebug() << __PRETTY_FUNCTION__;
119 return convertSceneCoordinateToLatLon(m_zoomLevel, m_sceneCoordinate);
122 QPoint MapEngine::convertLatLonToSceneCoordinate(QPointF latLonCoordinate)
124 qDebug() << __PRETTY_FUNCTION__;
126 qreal longitude = latLonCoordinate.x();
127 qreal latitude = latLonCoordinate.y();
129 if ((longitude > MAX_LONGITUDE) || (longitude < MIN_LONGITUDE))
130 return QPoint(UNDEFINED, UNDEFINED);
131 if ((latitude > MAX_LATITUDE) || (latitude < MIN_LATITUDE))
132 return QPoint(UNDEFINED, UNDEFINED);
134 qreal z = static_cast<qreal>(1 << MAX_MAP_ZOOM_LEVEL);
136 qreal x = static_cast<qreal>((longitude + 180.0) / 360.0);
137 qreal y = static_cast<qreal>((1.0 - log(tan(latitude * M_PI / 180.0) + 1.0
138 / cos(latitude * M_PI / 180.0)) / M_PI) / 2.0);
140 return QPointF(x * z * TILE_SIZE_X, y * z * TILE_SIZE_Y).toPoint();
143 QPointF MapEngine::convertSceneCoordinateToLatLon(int zoomLevel, QPoint sceneCoordinate)
145 qDebug() << __PRETTY_FUNCTION__;
147 double tileFactor = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
148 double xFactor = (sceneCoordinate.x() / (TILE_SIZE_X*tileFactor));
149 double yFactor = (sceneCoordinate.y() / (TILE_SIZE_Y*tileFactor));
151 tileFactor = 1 << zoomLevel;
152 double longitude = xFactor / tileFactor * 360.0 - 180;
154 double n = M_PI - 2.0 * M_PI * yFactor / tileFactor;
155 double latitude = 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n)));
157 return QPointF(longitude, latitude);
160 QPoint MapEngine::convertSceneCoordinateToTileNumber(int zoomLevel, QPoint sceneCoordinate)
162 qDebug() << __PRETTY_FUNCTION__;
164 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
165 int x = static_cast<int>(sceneCoordinate.x() / (TILE_SIZE_X * pow));
166 int y = static_cast<int>(sceneCoordinate.y() / (TILE_SIZE_Y * pow));
171 QPoint MapEngine::convertTileNumberToSceneCoordinate(int zoomLevel, QPoint tileNumber)
173 qDebug() << __PRETTY_FUNCTION__;
175 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
176 int x = tileNumber.x() * TILE_SIZE_X * pow;
177 int y = tileNumber.y() * TILE_SIZE_Y * pow;
182 bool MapEngine::disableAutoCentering(QPoint sceneCoordinate)
184 if (isAutoCenteringEnabled()) {
185 int zoomFactor = (1 << (MAX_MAP_ZOOM_LEVEL - m_zoomLevel));
187 QPoint oldPixelValue = QPoint(m_lastManualPosition.x() / zoomFactor,
188 m_lastManualPosition.y() / zoomFactor);
190 QPoint newPixelValue = QPoint(sceneCoordinate.x() / zoomFactor,
191 sceneCoordinate.y() / zoomFactor);
193 if ((abs(oldPixelValue.x() - newPixelValue.x()) > AUTO_CENTERING_DISABLE_DISTANCE) ||
194 (abs(oldPixelValue.y() - newPixelValue.y()) > AUTO_CENTERING_DISABLE_DISTANCE))
201 void MapEngine::getTiles(QPoint sceneCoordinate)
203 qDebug() << __PRETTY_FUNCTION__;
205 m_viewTilesGrid = calculateTileGrid(sceneCoordinate);
206 QRect tilesSceneRect = updateViewTilesSceneRect();
208 int topLeftX = m_viewTilesGrid.topLeft().x();
209 int topLeftY = m_viewTilesGrid.topLeft().y();
210 int bottomRightX = m_viewTilesGrid.bottomRight().x();
211 int bottomRightY = m_viewTilesGrid.bottomRight().y();
213 int tileMaxVal = tileMaxValue(m_zoomLevel);
215 // qWarning() << __PRETTY_FUNCTION__ << "topleft:" << topLeftX << topLeftY
216 // << "bottomright:" << bottomRightX << bottomRightY;
218 for (int x = topLeftX; x <= bottomRightX; ++x) {
219 for (int y = topLeftY; y <= bottomRightY; ++y) {
226 // span in horizontal direction if world limits has been reached
228 tileX += tileMaxVal + 1;
229 // qWarning() << __PRETTY_FUNCTION__ << "x value:" << requestedX << "->" << tileX;
231 else if (tileX > tileMaxVal) {
232 tileX -= tileMaxVal + 1;
233 // qWarning() << __PRETTY_FUNCTION__ << "x value:" << requestedX << "->" << tileX;
236 // map doesn't span in vertical direction
237 if (tileY < 0 || tileY > tileMaxVal)
241 if (!(tile = m_mapScene->tileInScene(tilePath(m_zoomLevel, tileX, tileY)))) {
242 emit fetchImage(m_zoomLevel, tileX, tileY);
245 // tile was already in the scene, maybe it should be moved?
246 // qWarning() << __PRETTY_FUNCTION__ << "tile was already in the scene";
247 // m_mapScene->spanItem(tile, tilesSceneRect);
252 // m_friendItemsHandler->spanFriendItems(tilesSceneRect);
254 m_mapScene->spanItems();
257 void MapEngine::gpsPositionUpdate(QPointF position, qreal accuracy)
259 qDebug() << __PRETTY_FUNCTION__;
261 m_gpsLocationItem->updatePosition(convertLatLonToSceneCoordinate(position), accuracy);
263 if (m_autoCenteringEnabled)
264 setViewLocation(position);
267 void MapEngine::init()
269 qDebug() << __PRETTY_FUNCTION__;
271 QPointF startLocation;
272 QSettings settings(DIRECTORY_NAME, FILE_NAME);
274 if (settings.value(MAP_LAST_POSITION, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString()
275 == ERROR_VALUE_NOT_FOUND_ON_SETTINGS || settings.value(MAP_LAST_ZOOMLEVEL,
276 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString() == ERROR_VALUE_NOT_FOUND_ON_SETTINGS) {
278 startLocation = QPointF(DEFAULT_LONGITUDE, DEFAULT_LATITUDE);
279 m_zoomLevel = DEFAULT_START_ZOOM_LEVEL;
281 m_zoomLevel = settings.value(MAP_LAST_ZOOMLEVEL, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toInt();
282 startLocation = settings.value(MAP_LAST_POSITION,
283 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toPointF();
286 emit zoomLevelChanged(m_zoomLevel);
287 setViewLocation(QPointF(startLocation.x(), startLocation.y()));
290 bool MapEngine::isAutoCenteringEnabled()
292 return m_autoCenteringEnabled;
295 bool MapEngine::isCenterTileChanged(QPoint sceneCoordinate)
297 qDebug() << __PRETTY_FUNCTION__;
299 QPoint centerTile = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
300 QPoint temp = m_centerTile;
301 m_centerTile = centerTile;
303 return (centerTile != temp);
306 void MapEngine::mapImageReceived(int zoomLevel, int x, int y, const QPixmap &image)
308 qDebug() << __PRETTY_FUNCTION__ << "x:" << x << "y:" << y;
310 QString hashKey = tilePath(zoomLevel, x, y);
311 if (!m_mapScene->tileInScene(hashKey)) {
313 MapTile *mapTile = new MapTile();
314 mapTile->setZoomLevel(zoomLevel, m_zoomLevel);
315 mapTile->setTileNumber(QPoint(x, y));
316 mapTile->setPixmap(image);
318 m_mapScene->addTile(mapTile, hashKey);
320 m_mapScene->enqueueRemoveStackedTiles(mapTile);
323 qCritical() << __PRETTY_FUNCTION__ << "WARNING: Received tile which already is in the scene";
327 void MapEngine::receiveOwnLocation(User *user)
329 qDebug() << __PRETTY_FUNCTION__;
332 QPoint newPosition = convertLatLonToSceneCoordinate(user->coordinates());
333 if (m_ownLocation->pos().toPoint() != newPosition) {
334 m_ownLocation->setPos(newPosition);
337 if (!m_ownLocation->isVisible())
338 m_ownLocation->show();
341 m_ownLocation->hide();
345 QGraphicsScene* MapEngine::scene()
347 qDebug() << __PRETTY_FUNCTION__;
352 void MapEngine::setAutoCentering(bool enabled)
354 m_autoCenteringEnabled = enabled;
357 void MapEngine::setGPSEnabled(bool enabled)
359 m_gpsLocationItem->setEnabled(enabled);
362 void MapEngine::setLocation(QPoint sceneCoordinate)
364 qWarning() << __PRETTY_FUNCTION__ << "X:" << sceneCoordinate.x();
366 if (sceneCoordinate.x() < 0) {
367 // qWarning() << __PRETTY_FUNCTION__ << "World west limit reached";
368 sceneCoordinate.setX(sceneCoordinate.x() + WORLD_PIXELS_X);
370 else if (sceneCoordinate.x() > WORLD_PIXELS_X - 1) {
371 // qWarning() << __PRETTY_FUNCTION__ << "World east limit reached";
372 sceneCoordinate.setX(sceneCoordinate.x() - WORLD_PIXELS_X);
375 if (disableAutoCentering(sceneCoordinate))
376 emit mapScrolledManually();
378 m_sceneCoordinate = sceneCoordinate;
379 emit locationChanged(m_sceneCoordinate);
381 if (isCenterTileChanged(sceneCoordinate)) {
382 getTiles(sceneCoordinate);
383 m_mapScene->removeOutOfViewTiles();
387 void MapEngine::setZoomLevel(int newZoomLevel)
389 qDebug() << __PRETTY_FUNCTION__;
391 m_zoomLevel = newZoomLevel;
392 emit zoomLevelChanged(m_zoomLevel);
395 void MapEngine::setViewLocation(QPointF latLonCoordinate)
397 qDebug() << __PRETTY_FUNCTION__;
399 QPoint sceneCoordinate = convertLatLonToSceneCoordinate(latLonCoordinate);
401 m_lastManualPosition = sceneCoordinate;
403 setLocation(sceneCoordinate);
406 int MapEngine::tileMaxValue(int zoomLevel)
408 qDebug() << __PRETTY_FUNCTION__;
410 return (1 << zoomLevel) - 1;
413 QString MapEngine::tilePath(int zoomLevel, int x, int y)
415 qDebug() << __PRETTY_FUNCTION__;
417 QString tilePathString(QString::number(zoomLevel) + "/");
418 tilePathString.append(QString::number(x) + "/");
419 tilePathString.append(QString::number(y));
421 return tilePathString;
424 QRect MapEngine::updateViewTilesSceneRect()
426 qDebug() << __PRETTY_FUNCTION__;
428 const QPoint ONE_TILE = QPoint(1, 1);
429 const QPoint ONE_PIXEL = QPoint(1, 1);
431 QPoint topLeft = convertTileNumberToSceneCoordinate(m_zoomLevel, m_viewTilesGrid.topLeft());
432 // one tile - one pixel is added because returned coordinates are pointing to upper left corner
434 QPoint bottomRight = convertTileNumberToSceneCoordinate(m_zoomLevel,
435 m_viewTilesGrid.bottomRight()
436 + ONE_TILE) - ONE_PIXEL;
437 QRect rect(topLeft, bottomRight);
438 m_mapScene->viewRectUpdated(rect);
443 void MapEngine::viewResized(const QSize &size)
445 qDebug() << __PRETTY_FUNCTION__;
448 emit locationChanged(m_sceneCoordinate);
449 getTiles(m_sceneCoordinate);
450 m_mapScene->removeOutOfViewTiles();
453 void MapEngine::viewZoomFinished()
455 qDebug() << __PRETTY_FUNCTION__;
459 m_mapScene->removeOutOfViewTiles();
462 if (m_zoomLevel == MAX_MAP_ZOOM_LEVEL)
463 emit maxZoomLevelReached();
464 else if (m_zoomLevel == MIN_VIEW_ZOOM_LEVEL)
465 emit minZoomLevelReached();
468 void MapEngine::zoomIn()
470 qDebug() << __PRETTY_FUNCTION__;
472 if (m_zoomLevel < MAX_MAP_ZOOM_LEVEL) {
475 emit zoomLevelChanged(m_zoomLevel);
477 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
479 getTiles(m_sceneCoordinate);
483 void MapEngine::zoomOut()
485 qDebug() << __PRETTY_FUNCTION__;
487 if (m_zoomLevel > MIN_VIEW_ZOOM_LEVEL) {
489 emit zoomLevelChanged(m_zoomLevel);
491 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
493 getTiles(m_sceneCoordinate);