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 "engine/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 QPoint tileCoordinate = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
98 int gridWidth = (m_viewSize.width() / TILE_SIZE_X + 1) + (GRID_PADDING * 2);
99 int gridHeight = (m_viewSize.height() / TILE_SIZE_Y + 1) + (GRID_PADDING * 2);
100 int topLeftX = tileCoordinate.x() - (gridWidth / 2);
101 int topLeftY = tileCoordinate.y() - (gridHeight / 2);
103 m_mapFetcher->setDownloadQueueSize(gridWidth * gridHeight);
105 return QRect(topLeftX, topLeftY, gridWidth, gridHeight);
108 QPointF MapEngine::centerGeoCoordinate()
110 qDebug() << __PRETTY_FUNCTION__;
112 return convertSceneCoordinateToLatLon(m_zoomLevel, m_sceneCoordinate);
115 QPoint MapEngine::convertLatLonToSceneCoordinate(QPointF latLonCoordinate)
117 qDebug() << __PRETTY_FUNCTION__;
119 qreal longitude = latLonCoordinate.x();
120 qreal latitude = latLonCoordinate.y();
122 if ((longitude > MAX_LONGITUDE) || (longitude < MIN_LONGITUDE))
123 return QPoint(UNDEFINED, UNDEFINED);
124 if ((latitude > MAX_LATITUDE) || (latitude < MIN_LATITUDE))
125 return QPoint(UNDEFINED, UNDEFINED);
127 qreal z = static_cast<qreal>(1 << MAX_MAP_ZOOM_LEVEL);
129 qreal x = static_cast<qreal>((longitude + 180.0) / 360.0);
130 qreal y = static_cast<qreal>((1.0 - log(tan(latitude * M_PI / 180.0) + 1.0
131 / cos(latitude * M_PI / 180.0)) / M_PI) / 2.0);
133 return QPointF(x * z * TILE_SIZE_X, y * z * TILE_SIZE_Y).toPoint();
136 QPointF MapEngine::convertSceneCoordinateToLatLon(int zoomLevel, QPoint sceneCoordinate)
138 qDebug() << __PRETTY_FUNCTION__;
140 double tileFactor = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
141 double xFactor = (sceneCoordinate.x() / (TILE_SIZE_X*tileFactor));
142 double yFactor = (sceneCoordinate.y() / (TILE_SIZE_Y*tileFactor));
144 tileFactor = 1 << zoomLevel;
145 double longitude = xFactor / tileFactor * 360.0 - 180;
147 double n = M_PI - 2.0 * M_PI * yFactor / tileFactor;
148 double latitude = 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n)));
150 return QPointF(longitude, latitude);
153 QPoint MapEngine::convertSceneCoordinateToTileNumber(int zoomLevel, QPoint sceneCoordinate)
155 qDebug() << __PRETTY_FUNCTION__;
157 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
158 int x = static_cast<int>(sceneCoordinate.x() / (TILE_SIZE_X * pow));
159 int y = static_cast<int>(sceneCoordinate.y() / (TILE_SIZE_Y * pow));
164 QPoint MapEngine::convertTileNumberToSceneCoordinate(int zoomLevel, QPoint tileNumber)
166 qDebug() << __PRETTY_FUNCTION__;
168 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
169 int x = tileNumber.x() * TILE_SIZE_X * pow;
170 int y = tileNumber.y() * TILE_SIZE_Y * pow;
175 bool MapEngine::disableAutoCentering(QPoint sceneCoordinate)
177 if (isAutoCenteringEnabled()) {
178 int zoomFactor = (1 << (MAX_MAP_ZOOM_LEVEL - m_zoomLevel));
180 QPoint oldPixelValue = QPoint(m_lastManualPosition.x() / zoomFactor,
181 m_lastManualPosition.y() / zoomFactor);
183 QPoint newPixelValue = QPoint(sceneCoordinate.x() / zoomFactor,
184 sceneCoordinate.y() / zoomFactor);
186 if ((abs(oldPixelValue.x() - newPixelValue.x()) > AUTO_CENTERING_DISABLE_DISTANCE) ||
187 (abs(oldPixelValue.y() - newPixelValue.y()) > AUTO_CENTERING_DISABLE_DISTANCE))
194 void MapEngine::getTiles(QPoint sceneCoordinate)
196 qDebug() << __PRETTY_FUNCTION__;
198 m_viewTilesGrid = calculateTileGrid(sceneCoordinate);
199 updateViewTilesSceneRect();
201 int topLeftX = m_viewTilesGrid.topLeft().x();
202 int topLeftY = m_viewTilesGrid.topLeft().y();
203 int bottomRightX = m_viewTilesGrid.bottomRight().x();
204 int bottomRightY = m_viewTilesGrid.bottomRight().y();
206 int tileMaxVal = tileMaxValue(m_zoomLevel);
208 for (int x = topLeftX; x <= bottomRightX; ++x) {
209 for (int y = topLeftY; y <= bottomRightY; ++y) {
216 else if (tileX > tileMaxVal)
221 else if (tileY > tileMaxVal)
224 if (!m_mapScene->isTileInScene(tilePath(m_zoomLevel, tileX, tileY)))
225 emit fetchImage(m_zoomLevel, tileX, tileY);
230 void MapEngine::gpsPositionUpdate(QPointF position, qreal accuracy)
232 qDebug() << __PRETTY_FUNCTION__;
234 m_gpsLocationItem->updatePosition(convertLatLonToSceneCoordinate(position), accuracy);
236 if (m_autoCenteringEnabled)
237 setViewLocation(position);
240 void MapEngine::init()
242 qDebug() << __PRETTY_FUNCTION__;
244 QPointF startLocation;
245 QSettings settings(DIRECTORY_NAME, FILE_NAME);
247 if (settings.value(MAP_LAST_POSITION, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString()
248 == ERROR_VALUE_NOT_FOUND_ON_SETTINGS || settings.value(MAP_LAST_ZOOMLEVEL,
249 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString() == ERROR_VALUE_NOT_FOUND_ON_SETTINGS) {
251 startLocation = QPointF(DEFAULT_LONGITUDE, DEFAULT_LATITUDE);
252 m_zoomLevel = DEFAULT_START_ZOOM_LEVEL;
254 m_zoomLevel = settings.value(MAP_LAST_ZOOMLEVEL, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toInt();
255 startLocation = settings.value(MAP_LAST_POSITION,
256 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toPointF();
259 emit zoomLevelChanged(m_zoomLevel);
260 setViewLocation(QPointF(startLocation.x(), startLocation.y()));
263 bool MapEngine::isAutoCenteringEnabled()
265 return m_autoCenteringEnabled;
268 bool MapEngine::isCenterTileChanged(QPoint sceneCoordinate)
270 qDebug() << __PRETTY_FUNCTION__;
272 QPoint centerTile = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
273 QPoint temp = m_centerTile;
274 m_centerTile = centerTile;
276 return (centerTile != temp);
279 void MapEngine::mapImageReceived(int zoomLevel, int x, int y, const QPixmap &image)
281 qDebug() << __PRETTY_FUNCTION__;
283 QString hashKey = tilePath(zoomLevel, x, y);
284 if (!m_mapScene->isTileInScene(hashKey)) {
286 MapTile *mapTile = new MapTile();
287 mapTile->setZoomLevel(zoomLevel, m_zoomLevel);
288 mapTile->setTileNumber(QPoint(x, y));
289 mapTile->setPixmap(image);
291 m_mapScene->addTile(mapTile, hashKey);
293 m_mapScene->enqueueRemoveStackedTiles(mapTile);
297 void MapEngine::receiveOwnLocation(User *user)
299 qDebug() << __PRETTY_FUNCTION__;
302 QPoint newPosition = convertLatLonToSceneCoordinate(user->coordinates());
303 if (m_ownLocation->pos().toPoint() != newPosition) {
304 m_ownLocation->setPos(newPosition);
307 if (!m_ownLocation->isVisible())
308 m_ownLocation->show();
311 m_ownLocation->hide();
315 QGraphicsScene* MapEngine::scene()
317 qDebug() << __PRETTY_FUNCTION__;
322 void MapEngine::setAutoCentering(bool enabled)
324 m_autoCenteringEnabled = enabled;
327 void MapEngine::setGPSEnabled(bool enabled)
329 m_gpsLocationItem->setEnabled(enabled);
332 void MapEngine::setLocation(QPoint sceneCoordinate)
334 qDebug() << __PRETTY_FUNCTION__;
336 if (disableAutoCentering(sceneCoordinate))
337 emit mapScrolledManually();
339 m_sceneCoordinate = sceneCoordinate;
340 emit locationChanged(m_sceneCoordinate);
342 if (isCenterTileChanged(sceneCoordinate)) {
343 getTiles(sceneCoordinate);
344 m_mapScene->removeOutOfViewTiles();
348 void MapEngine::setZoomLevel(int newZoomLevel)
350 qDebug() << __PRETTY_FUNCTION__;
352 m_zoomLevel = newZoomLevel;
353 emit zoomLevelChanged(m_zoomLevel);
356 void MapEngine::setViewLocation(QPointF latLonCoordinate)
358 qDebug() << __PRETTY_FUNCTION__;
360 QPoint sceneCoordinate = convertLatLonToSceneCoordinate(latLonCoordinate);
362 m_lastManualPosition = sceneCoordinate;
364 setLocation(sceneCoordinate);
367 int MapEngine::tileMaxValue(int zoomLevel)
369 qDebug() << __PRETTY_FUNCTION__;
371 return (1 << zoomLevel) - 1;
374 QString MapEngine::tilePath(int zoomLevel, int x, int y)
376 qDebug() << __PRETTY_FUNCTION__;
378 QString tilePathString(QString::number(zoomLevel) + "/");
379 tilePathString.append(QString::number(x) + "/");
380 tilePathString.append(QString::number(y));
382 return tilePathString;
385 void MapEngine::updateViewTilesSceneRect()
387 qDebug() << __PRETTY_FUNCTION__;
389 const QPoint ONE_TILE = QPoint(1, 1);
390 const QPoint ONE_PIXEL = QPoint(1, 1);
392 QPoint topLeft = convertTileNumberToSceneCoordinate(m_zoomLevel, m_viewTilesGrid.topLeft());
393 // one tile - one pixel is added because returned coordinates are pointing to upper left corner
395 QPoint bottomRight = convertTileNumberToSceneCoordinate(m_zoomLevel,
396 m_viewTilesGrid.bottomRight()
397 + ONE_TILE) - ONE_PIXEL;
399 m_mapScene->viewRectUpdated(QRect(topLeft, bottomRight));
402 void MapEngine::viewResized(const QSize &size)
404 qDebug() << __PRETTY_FUNCTION__;
407 emit locationChanged(m_sceneCoordinate);
408 getTiles(m_sceneCoordinate);
409 m_mapScene->removeOutOfViewTiles();
412 void MapEngine::viewZoomFinished()
414 qDebug() << __PRETTY_FUNCTION__;
418 m_mapScene->removeOutOfViewTiles();
421 if (m_zoomLevel == MAX_MAP_ZOOM_LEVEL)
422 emit maxZoomLevelReached();
423 else if (m_zoomLevel == MIN_VIEW_ZOOM_LEVEL)
424 emit minZoomLevelReached();
427 void MapEngine::zoomIn()
429 qDebug() << __PRETTY_FUNCTION__;
431 if (m_zoomLevel < MAX_MAP_ZOOM_LEVEL) {
434 emit zoomLevelChanged(m_zoomLevel);
436 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
438 getTiles(m_sceneCoordinate);
442 void MapEngine::zoomOut()
444 qDebug() << __PRETTY_FUNCTION__;
446 if (m_zoomLevel > MIN_VIEW_ZOOM_LEVEL) {
448 emit zoomLevelChanged(m_zoomLevel);
450 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
452 getTiles(m_sceneCoordinate);