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
9 Situare is free software; you can redistribute it and/or
10 modify it under the terms of the GNU General Public License
11 version 2 as published by the Free Software Foundation.
13 Situare is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Situare; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 #include <QStringList>
29 #include <QHashIterator>
32 #include "mapengine.h"
35 MapEngine::MapEngine(QObject *parent)
37 , m_centerTile(QPoint(UNDEFINED, UNDEFINED))
38 , m_viewSize(QSize(DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT))
39 , m_zoomLevel(DEFAULT_ZOOM_LEVEL)
41 m_mapScene = new MapScene(this);
43 m_mapFetcher = new MapFetcher(new QNetworkAccessManager(this), this);
44 connect(this, SIGNAL(fetchImage(QUrl)), m_mapFetcher, SLOT(fetchMapImage(QUrl)));
45 connect(m_mapFetcher, SIGNAL(mapImageReceived(QUrl,QPixmap)), this,
46 SLOT(mapImageReceived(QUrl, QPixmap)));
48 m_mapZoomPanel = new MapZoomPanel(NULL, MAP_ZOOM_PANEL_POSITION_X, MAP_ZOOM_PANEL_POSITION_Y);
49 m_mapScene->addItem(m_mapZoomPanel);
50 connect(m_mapZoomPanel, SIGNAL(zoomInPressed()), this, SLOT(zoomIn()));
51 connect(m_mapZoomPanel, SIGNAL(zoomOutPressed()), this, SLOT(zoomOut()));
54 void MapEngine::init()
56 emit zoomLevelChanged(m_zoomLevel);
57 setViewLocation(QPointF(DEFAULT_LONGITUDE, DEFAULT_LATITUDE));
60 void MapEngine::setViewLocation(QPointF latLonCoordinate)
62 qDebug() << __PRETTY_FUNCTION__;
63 setLocation(convertLatLonToSceneCoordinate(latLonCoordinate));
66 QUrl MapEngine::buildURL(int zoomLevel, QPoint tileNumbers)
68 QString url = QString("http://tile.openstreetmap.org/mapnik/%1/%2/%3.png")
69 .arg(zoomLevel).arg(tileNumbers.x()).arg(tileNumbers.y());
74 void MapEngine::parseURL(const QUrl &url, int &zoom, int &x, int &y)
76 QString path = url.path();
77 QStringList pathParts = path.split("/", QString::SkipEmptyParts);
79 int size = pathParts.size();
82 zoom = (pathParts.at(size-3)).toInt();
83 x = (pathParts.at(size-2)).toInt();
84 QString yString = pathParts.at(size-1);
90 void MapEngine::mapImageReceived(const QUrl &url, const QPixmap &pixmap)
92 //qDebug() << __PRETTY_FUNCTION__;
98 parseURL(url, zoom, x, y);
99 QString hashKey = tilePath(zoom, x, y);
100 if (!m_mapScene->isTileInScene(hashKey)) {
102 MapTile *mapTile = new MapTile();
103 mapTile->setZoomLevel(zoom);
104 mapTile->setTileNumber(QPoint(x, y));
105 mapTile->setPixmap(pixmap);
107 m_mapScene->addTile(mapTile, hashKey);
109 m_mapScene->debugItemsCount();
111 m_mapScene->removeStackedTiles(mapTile, viewRect());
115 QGraphicsScene* MapEngine::scene()
117 return dynamic_cast<QGraphicsScene *>(m_mapScene);
120 int MapEngine::tileMaxValue(int zoomLevel)
122 return (1 << zoomLevel) - 1;
125 QRect MapEngine::calculateTileGrid(QPoint sceneCoordinate)
127 QPoint tileCoordinate = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
128 int gridWidth = (m_viewSize.width()/TILE_SIZE_X + 1) + (GRID_PADDING*2);
129 int gridHeight = (m_viewSize.height()/TILE_SIZE_Y + 1) + (GRID_PADDING*2);
130 int topLeftX = tileCoordinate.x() - (gridWidth/2);
131 int topLeftY = tileCoordinate.y() - (gridHeight/2);
133 return QRect(topLeftX, topLeftY, gridWidth, gridHeight);
136 void MapEngine::alignImmovableItems(QPoint viewTopLeft)
138 m_mapZoomPanel->setPos(viewTopLeft);
140 // qDebug() << __PRETTY_FUNCTION__ << "viewTopLeft:" << viewTopLeft;
143 void MapEngine::setLocation(QPoint sceneCoordinate)
145 // qDebug() << __PRETTY_FUNCTION__;
147 m_sceneCoordinate = sceneCoordinate;
148 emit locationChanged(m_sceneCoordinate);
150 if (isCenterTileChanged(sceneCoordinate)) {
151 getTiles(sceneCoordinate);
152 m_mapScene->removeOutOfViewTiles(viewRect());
156 bool MapEngine::isCenterTileChanged(QPoint sceneCoordinate)
158 QPoint centerTile = convertSceneCoordinateToTileNumber(m_zoomLevel, sceneCoordinate);
159 QPoint temp = m_centerTile;
160 m_centerTile = centerTile;
162 return (centerTile != temp);
165 void MapEngine::getTiles(QPoint sceneCoordinate)
167 // qDebug() << __PRETTY_FUNCTION__;
169 m_viewGrid = calculateTileGrid(sceneCoordinate);
171 int topLeftX = m_viewGrid.topLeft().x();
172 int topLeftY = m_viewGrid.topLeft().y();
173 int bottomRightX = m_viewGrid.bottomRight().x();
174 int bottomRightY = m_viewGrid.bottomRight().y();
176 int tileMaxVal = tileMaxValue(m_zoomLevel);
178 for (int x = topLeftX; x <= bottomRightX; ++x) {
179 for (int y = topLeftY; y <= bottomRightY; ++y) {
186 else if (tileX > tileMaxVal)
191 else if (tileY > tileMaxVal)
194 QUrl url = buildURL(m_zoomLevel, QPoint(tileX, tileY));
196 if (!m_mapScene->isTileInScene(tilePath(m_zoomLevel, tileX, tileY)))
197 emit fetchImage(url);
202 QRect MapEngine::viewRect()
204 QPoint topLeft = convertTileNumberToSceneCoordinate(m_zoomLevel, m_viewGrid.topLeft());
205 QPoint bottomRight = convertTileNumberToSceneCoordinate(m_zoomLevel, m_viewGrid.bottomRight()
207 return QRect(topLeft, bottomRight);
210 void MapEngine::viewResized(const QSize &size)
213 getTiles(m_sceneCoordinate);
214 m_mapScene->removeOutOfViewTiles(viewRect());
217 void MapEngine::viewZoomInFinished()
219 qDebug() << __PRETTY_FUNCTION__;
220 m_mapScene->removeOutOfViewTiles(viewRect());
223 void MapEngine::zoomIn()
225 // qDebug() << __PRETTY_FUNCTION__;
227 if (m_zoomLevel < MAX_MAP_ZOOM_LEVEL) {
229 emit zoomLevelChanged(m_zoomLevel);
231 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
233 getTiles(m_sceneCoordinate);
237 void MapEngine::zoomOut()
239 // qDebug() << __PRETTY_FUNCTION__;
241 if (m_zoomLevel > MIN_MAP_ZOOM_LEVEL) {
243 emit zoomLevelChanged(m_zoomLevel);
245 m_mapScene->setTilesDrawingLevels(m_zoomLevel);
247 getTiles(m_sceneCoordinate);
251 QString MapEngine::tilePath(int zoomLevel, int x, int y)
253 QString tilePathString(QString::number(zoomLevel) + "/");
254 tilePathString.append(QString::number(x) + "/");
255 tilePathString.append(QString::number(y));
257 return tilePathString;
260 QPoint MapEngine::convertSceneCoordinateToTileNumber(int zoomLevel, QPoint sceneCoordinate)
262 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
263 int x = static_cast<int>(sceneCoordinate.x() / (TILE_SIZE_X*pow));
264 int y = static_cast<int>(sceneCoordinate.y() / (TILE_SIZE_Y*pow));
269 QPoint MapEngine::convertTileNumberToSceneCoordinate(int zoomLevel, QPoint tileNumber)
271 int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
272 int x = tileNumber.x() * TILE_SIZE_X * pow;
273 int y = tileNumber.y() * TILE_SIZE_Y * pow;
278 QPoint MapEngine::convertLatLonToSceneCoordinate(QPointF latLonCoordinate)
280 // qDebug() << __PRETTY_FUNCTION__;
282 qreal longitude = latLonCoordinate.x();
283 qreal latitude = latLonCoordinate.y();
285 if ((longitude > MAX_LONGITUDE) || (longitude < MIN_LONGITUDE))
286 return QPoint(UNDEFINED, UNDEFINED);
287 if ((latitude > MAX_LATITUDE) || (latitude < MIN_LATITUDE))
288 return QPoint(UNDEFINED, UNDEFINED);
290 qreal z = static_cast<qreal>(1 << MAX_MAP_ZOOM_LEVEL);
292 qreal x = static_cast<qreal>((longitude + 180.0) / 360.0);
293 qreal y = static_cast<qreal>((1.0 - log(tan(latitude * M_PI / 180.0) + 1.0
294 / cos(latitude * M_PI / 180.0)) / M_PI) / 2.0);
296 return QPointF(x*z*TILE_SIZE_X, y*z*TILE_SIZE_Y).toPoint();