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 "network/networkaccessmanager.h"
42 #include "ownlocationitem.h"
43 #include "user/user.h"
45 #include "mapengine.h"
47 MapEngine::MapEngine(QObject *parent)
49 m_autoCenteringEnabled(false),
51 m_zoomLevel(DEFAULT_ZOOM_LEVEL),
52 m_centerTile(QPoint(UNDEFINED, UNDEFINED)),
53 m_lastManualPosition(QPoint(0, 0)),
54 m_tilesGridSize(QSize(0, 0)),
55 m_viewSize(QSize(DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT))
57 qDebug() << __PRETTY_FUNCTION__;
59 m_mapScene = new MapScene(this);
61 m_mapFetcher = new MapFetcher(NetworkAccessManager::instance(), this);
62 connect(this, SIGNAL(fetchImage(int, int, int)),
63 m_mapFetcher, SLOT(enqueueFetchMapImage(int, int, int)));
64 connect(m_mapFetcher, SIGNAL(mapImageReceived(int, int, int, QPixmap)),
65 this, SLOT(mapImageReceived(int, int, int, QPixmap)));
67 m_ownLocation = new OwnLocationItem();
68 m_ownLocation->hide(); // hide until first location info is received
69 m_mapScene->addItem(m_ownLocation);
71 m_gpsLocationItem = new GPSLocationItem();
72 m_mapScene->addItem(m_gpsLocationItem);
74 m_friendItemsHandler = new FriendItemsHandler(m_mapScene, this);
75 connect(this, SIGNAL(zoomLevelChanged(int)),
76 m_friendItemsHandler, SLOT(refactorFriendItems(int)));
78 connect(this, SIGNAL(friendsLocationsReady(QList<User*>&)),
79 m_friendItemsHandler, SLOT(friendListUpdated(QList<User*>&)));
81 connect(m_friendItemsHandler, SIGNAL(locationItemClicked(QList<QString>)),
82 this, SIGNAL(locationItemClicked(QList<QString>)));
85 MapEngine::~MapEngine()
87 qDebug() << __PRETTY_FUNCTION__;
89 QSettings settings(DIRECTORY_NAME, FILE_NAME);
90 settings.setValue(MAP_LAST_POSITION,
91 convertSceneCoordinateToLatLon(m_zoomLevel, m_sceneCoordinate));
92 settings.setValue(MAP_LAST_ZOOMLEVEL, m_zoomLevel);
95 QRect MapEngine::calculateTileGrid(QPoint sceneCoordinate)
97 qDebug() << __PRETTY_FUNCTION__;
99 QPoint tileCoordinate = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
102 topLeft.setX(tileCoordinate.x() - (m_tilesGridSize.width() / 2));
103 topLeft.setY(tileCoordinate.y() - (m_tilesGridSize.height() / 2));
105 return QRect(topLeft, m_tilesGridSize);
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) {
214 // span in horizontal direction if world limits has been reached
216 // tileX += tileMaxVal + 1;
217 // else if (tileX > tileMaxVal)
218 // tileX -= tileMaxVal + 1;
220 // map doesn't span in vertical direction
221 if (tileY < 0 || tileY > tileMaxVal) /// @todo replace variable with method
224 if (!m_mapScene->tileInScene(tilePath(m_zoomLevel, tileX, tileY)))
225 emit fetchImage(m_zoomLevel, normalizeTileNumberX(tileX), tileY);
229 QRect spanRect = m_mapScene->spanItems(m_scrollDirection, m_zoomLevel);
230 m_friendItemsHandler->spanHiddenFriendLocationItems(m_scrollDirection, spanRect);
231 m_friendItemsHandler->refactorFriendItems(m_zoomLevel);
234 void MapEngine::gpsPositionUpdate(QPointF position, qreal accuracy)
236 qDebug() << __PRETTY_FUNCTION__;
238 m_gpsLocationItem->updatePosition(convertLatLonToSceneCoordinate(position), accuracy);
240 if (m_autoCenteringEnabled)
241 setViewLocation(position);
244 void MapEngine::init()
246 qDebug() << __PRETTY_FUNCTION__;
248 QPointF startLocation;
249 QSettings settings(DIRECTORY_NAME, FILE_NAME);
251 if (settings.value(MAP_LAST_POSITION, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString()
252 == ERROR_VALUE_NOT_FOUND_ON_SETTINGS || settings.value(MAP_LAST_ZOOMLEVEL,
253 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toString() == ERROR_VALUE_NOT_FOUND_ON_SETTINGS) {
255 startLocation = QPointF(DEFAULT_LONGITUDE, DEFAULT_LATITUDE);
256 m_zoomLevel = qBound(MIN_VIEW_ZOOM_LEVEL, DEFAULT_START_ZOOM_LEVEL, MAX_MAP_ZOOM_LEVEL);
258 m_zoomLevel = settings.value(MAP_LAST_ZOOMLEVEL, ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toInt();
259 startLocation = settings.value(MAP_LAST_POSITION,
260 ERROR_VALUE_NOT_FOUND_ON_SETTINGS).toPointF();
263 emit zoomLevelChanged(m_zoomLevel);
264 setViewLocation(QPointF(startLocation.x(), startLocation.y()));
267 bool MapEngine::isAutoCenteringEnabled()
269 return m_autoCenteringEnabled;
272 bool MapEngine::isCenterTileChanged(QPoint sceneCoordinate)
274 qDebug() << __PRETTY_FUNCTION__;
276 QPoint centerTile = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
277 QPoint temp = m_centerTile;
278 m_centerTile = centerTile;
280 return (centerTile != temp);
283 void MapEngine::mapImageReceived(int zoomLevel, int x, int y, const QPixmap &image)
288 qWarning() << __PRETTY_FUNCTION__ << "x:" << x << "y:" << y;
290 // tile might already be in the scene if expired tile was returned from the cache to be
291 // temporarily displayed while downloading the fresh one
292 QString hashKey = tilePath(zoomLevel, x, y);
293 MapTile *oldTile = m_mapScene->tileInScene(hashKey);
295 m_mapScene->removeTile(oldTile);
298 QPoint tileNumber(x, y);
299 m_mapScene->addTile(zoomLevel, tileNumber, image, m_zoomLevel);
301 // expanding is only done if received tile zoom level is same as current zoom level
302 if (zoomLevel == m_zoomLevel) {
303 // expand to east side?
304 if (m_viewTilesGrid.right() > tileMaxValue(zoomLevel)) {
305 int crossing = m_viewTilesGrid.right() - tileMaxValue(zoomLevel);
306 if (tileNumber.x() < crossing) {
307 QPoint adjustedTileNumber(tileNumber.x() + tileMaxValue(zoomLevel) + 1, tileNumber.y());
308 m_mapScene->addTile(zoomLevel, adjustedTileNumber, image, m_zoomLevel);
309 qWarning() << __PRETTY_FUNCTION__ << "duplicate tile to east, x:" << x << "->" << adjustedTileNumber.x() << "y:" << adjustedTileNumber.y();
313 // expand to west side?
314 if (m_viewTilesGrid.left() < 0) {
315 int crossing = -m_viewTilesGrid.left();
316 if (tileNumber.x() > (tileMaxValue(zoomLevel) - crossing)) {
317 QPoint adjustedTileNumber(tileNumber.x() - tileMaxValue(zoomLevel) - 1, tileNumber.y());
318 m_mapScene->addTile(zoomLevel, adjustedTileNumber, image, m_zoomLevel);
319 qWarning() << __PRETTY_FUNCTION__ << "duplicate tile to west, x:" << x << "->" << adjustedTileNumber.x() << "y:" << adjustedTileNumber.y();
325 // int crossing = m_tilesGridSize.width() - tileMaxValue(zoomLevel) - 1;
326 //// qWarning() << __PRETTY_FUNCTION__ << "crossing:" << crossing;
327 // if (crossing > 0) {
328 // qWarning() << __PRETTY_FUNCTION__ << "grid was bigger than amount of tiles at this tile level";
330 // if (x < crossing) {
331 // // expand to east side
332 // QPoint adjustedTileNumber(tileNumber.x() + tileMaxValue(zoomLevel) + 1, tileNumber.y());
333 // m_mapScene->addTile(zoomLevel, adjustedTileNumber, image, m_zoomLevel);
334 // qWarning() << __PRETTY_FUNCTION__ << "duplicate tile to east, x:" << x << "->" << adjustedTileNumber.x();
337 // if (x > (tileMaxValue(zoomLevel) - crossing)) {
338 // // expand to west side
339 // QPoint adjustedTileNumber(tileNumber.x() - tileMaxValue(zoomLevel) - 1, tileNumber.y());
340 // m_mapScene->addTile(zoomLevel, adjustedTileNumber, image, m_zoomLevel);
341 // qWarning() << __PRETTY_FUNCTION__ << "duplicate tile to west, x:" << x << "->" << adjustedTileNumber.x();
345 m_mapScene->spanItems(m_scrollDirection, m_zoomLevel);
348 int MapEngine::normalizeTileNumberX(int tileX)
350 int tileMaxVal = tileMaxValue(m_zoomLevel);
353 tileX += tileMaxVal + 1;
355 while (tileX > tileMaxVal)
356 tileX -= tileMaxVal + 1;
361 void MapEngine::receiveOwnLocation(User *user)
363 qDebug() << __PRETTY_FUNCTION__;
366 QPoint newPosition = convertLatLonToSceneCoordinate(user->coordinates());
367 if (m_ownLocation->pos().toPoint() != newPosition) {
368 m_ownLocation->setPos(newPosition);
371 if (!m_ownLocation->isVisible())
372 m_ownLocation->show();
375 m_ownLocation->hide();
379 QGraphicsScene* MapEngine::scene()
381 qDebug() << __PRETTY_FUNCTION__;
386 void MapEngine::setAutoCentering(bool enabled)
388 m_autoCenteringEnabled = enabled;
391 void MapEngine::setGPSEnabled(bool enabled)
393 m_gpsLocationItem->setEnabled(enabled);
396 void MapEngine::setLocation(QPoint sceneCoordinate)
398 qDebug() << __PRETTY_FUNCTION__;
400 // jump to opposite side of the world if world limit is exceeded
401 if (sceneCoordinate.x() < 0)
402 sceneCoordinate.setX(sceneCoordinate.x() + WORLD_PIXELS_X);
403 else if (sceneCoordinate.x() > WORLD_PIXELS_X - 1)
404 sceneCoordinate.setX(sceneCoordinate.x() - WORLD_PIXELS_X);
406 if (sceneCoordinate.x() > m_sceneCoordinate.x())
407 m_scrollDirection = SCROLL_EAST;
409 m_scrollDirection = SCROLL_WEST;
411 if (disableAutoCentering(sceneCoordinate))
412 emit mapScrolledManually();
414 m_sceneCoordinate = sceneCoordinate;
415 emit locationChanged(m_sceneCoordinate);
417 if (isCenterTileChanged(sceneCoordinate)) {
418 getTiles(sceneCoordinate);
419 m_mapScene->removeOutOfViewTiles();
423 void MapEngine::setZoomLevel(int newZoomLevel)
425 qDebug() << __PRETTY_FUNCTION__;
427 m_zoomLevel = newZoomLevel;
431 void MapEngine::setTilesGridSize(const QSize &viewSize)
433 qDebug() << __PRETTY_FUNCTION__;
435 // there must be scrolling reserve of at least half tile added to tile amount
436 // calculated from view size
437 const qreal SCROLLING_RESERVE = 0.5;
439 // converting scene tile to tile number does cause grid centering inaccuracy of one tile
440 const int CENTER_TILE_INACCURACY = 1;
442 int gridWidth = ceil(qreal(viewSize.width()) / TILE_SIZE_X + SCROLLING_RESERVE)
443 + CENTER_TILE_INACCURACY + (GRID_PADDING * 2);
444 int gridHeight = ceil(qreal(viewSize.height()) / TILE_SIZE_Y + SCROLLING_RESERVE)
445 + CENTER_TILE_INACCURACY + (GRID_PADDING * 2);
447 m_mapFetcher->setDownloadQueueSize(gridWidth * gridHeight);
449 m_tilesGridSize.setHeight(gridHeight);
450 m_tilesGridSize.setWidth(gridWidth);
452 qWarning() << __PRETTY_FUNCTION__ << "tiles grid:" << m_tilesGridSize.width()
453 << "*" << m_tilesGridSize.height();
456 void MapEngine::setViewLocation(QPointF latLonCoordinate)
458 qDebug() << __PRETTY_FUNCTION__;
460 QPoint sceneCoordinate = convertLatLonToSceneCoordinate(latLonCoordinate);
462 m_lastManualPosition = sceneCoordinate;
464 setLocation(sceneCoordinate);
467 int MapEngine::tileMaxValue(int zoomLevel)
469 qDebug() << __PRETTY_FUNCTION__;
471 return (1 << zoomLevel) - 1;
474 QString MapEngine::tilePath(int zoomLevel, int x, int y)
476 qDebug() << __PRETTY_FUNCTION__;
478 QString tilePathString(QString::number(zoomLevel) + "/");
479 tilePathString.append(QString::number(x) + "/");
480 tilePathString.append(QString::number(y));
482 return tilePathString;
485 void MapEngine::updateViewTilesSceneRect()
487 qDebug() << __PRETTY_FUNCTION__;
489 const QPoint ONE_TILE = QPoint(1, 1);
490 const QPoint ONE_PIXEL = QPoint(1, 1);
492 QPoint topLeft = convertTileNumberToSceneCoordinate(m_zoomLevel, m_viewTilesGrid.topLeft());
493 // one tile - one pixel is added because returned coordinates are pointing to upper left corner
495 QPoint bottomRight = convertTileNumberToSceneCoordinate(m_zoomLevel,
496 m_viewTilesGrid.bottomRight()
497 + ONE_TILE) - ONE_PIXEL;
499 m_mapScene->viewRectUpdated(QRect(topLeft, bottomRight));
502 void MapEngine::viewResized(const QSize &size)
504 qDebug() << __PRETTY_FUNCTION__;
507 setTilesGridSize(m_viewSize);
509 emit locationChanged(m_sceneCoordinate);
510 getTiles(m_sceneCoordinate);
511 m_mapScene->removeOutOfViewTiles();
512 m_mapScene->setSceneVerticalOverlap(m_viewSize.height(), m_zoomLevel);
515 void MapEngine::viewZoomFinished()
517 qDebug() << __PRETTY_FUNCTION__;
521 m_mapScene->removeOutOfViewTiles();
524 if (m_zoomLevel == MAX_MAP_ZOOM_LEVEL)
525 emit maxZoomLevelReached();
526 else if (m_zoomLevel == MIN_VIEW_ZOOM_LEVEL)
527 emit minZoomLevelReached();
530 void MapEngine::zoomed()
532 emit zoomLevelChanged(m_zoomLevel);
533 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
534 getTiles(m_sceneCoordinate);
535 m_mapScene->setSceneVerticalOverlap(m_viewSize.height(), m_zoomLevel);
538 void MapEngine::zoomIn()
540 qDebug() << __PRETTY_FUNCTION__;
542 if (m_zoomLevel < MAX_MAP_ZOOM_LEVEL) {
549 void MapEngine::zoomOut()
551 qDebug() << __PRETTY_FUNCTION__;
553 if (m_zoomLevel > MIN_VIEW_ZOOM_LEVEL) {