2 Situare - A location system for Facebook
3 Copyright (C) 2010 Ixonos Plc. Authors:
5 Sami Rämö - sami.ramo@ixonos.com
7 Situare is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 version 2 as published by the Free Software Foundation.
11 Situare is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Situare; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
24 #include "mapcommon.h"
25 #include "mapengine.h"
30 MapScene::MapScene(QObject *parent)
31 : QGraphicsScene(parent)
32 , m_isRemoveStackedTilesRunning(false)
34 , m_tilesSceneRect(QRect(0, 0, 0, 0))
35 , m_viewTilesGrid(QRect(0, 0, 0, 0))
37 qDebug() << __PRETTY_FUNCTION__;
39 setBackgroundBrush(Qt::lightGray);
40 setSceneRect(QRect(QPoint(MAP_SCENE_MIN_PIXEL_X, OSM_MAP_MIN_PIXEL_Y),
41 QPoint(MAP_SCENE_MAX_PIXEL_X, OSM_MAP_MAX_PIXEL_Y)));
44 void MapScene::addTile(int tileZoomLevel, QPoint tileNumber, const QPixmap &image, int viewZoomLevel)
46 qDebug() << __PRETTY_FUNCTION__;
48 // tile might already be in the scene if expired tile was returned from the cache to be
49 // temporarily shown while downloading the fresh one.
50 QString hashKey = MapEngine::tilePath(tileZoomLevel, tileNumber.x(), tileNumber.y());
51 MapTile *oldTile = tileInScene(hashKey);
55 MapTile *tile = new MapTile();
56 tile->setZoomLevel(tileZoomLevel, viewZoomLevel);
57 tile->setTileNumber(tileNumber);
58 tile->setPixmap(image);
60 m_mapTilesInScene.insert(hashKey, tile);
63 qDebug() << __PRETTY_FUNCTION__ << "tiles count:" << m_mapTilesInScene.count();
65 enqueueRemoveStackedTiles(tile);
66 removeOtherLevelTiles();
69 void MapScene::enqueueRemoveStackedTiles(MapTile *newTile)
71 qDebug() << __PRETTY_FUNCTION__;
73 m_removeStackedTilesList << newTile;
74 if (!m_isRemoveStackedTilesRunning) {
75 m_isRemoveStackedTilesRunning = true;
76 QTimer::singleShot(0, this, SLOT(runNextStackedTilesRemoval()));
80 void MapScene::moveIntersectingItemsHorizontally(QRect from, int distance)
82 qDebug() << __PRETTY_FUNCTION__;
84 QList<QGraphicsItem *> spanItems = items(from, Qt::IntersectsItemBoundingRect);
85 foreach (QGraphicsItem *item, spanItems) {
86 if (!dynamic_cast<MapTile *>(item))
87 item->moveBy(distance, 0);
91 MapTile* MapScene::tileInScene(QString hashKey)
93 qDebug() << __PRETTY_FUNCTION__;
95 return m_mapTilesInScene.value(hashKey, 0);
98 void MapScene::runNextStackedTilesRemoval()
100 qDebug() << __PRETTY_FUNCTION__;
102 if (!m_removeStackedTilesList.isEmpty()) {
103 MapTile *tile = m_removeStackedTilesList.takeFirst();
104 removeStackedTiles(tile);
107 // schedule removal of the next tile if the list is not empty
108 if (!m_removeStackedTilesList.isEmpty())
109 QTimer::singleShot(0, this, SLOT(runNextStackedTilesRemoval()));
111 m_isRemoveStackedTilesRunning = false;
114 void MapScene::removeOtherLevelTiles()
116 qDebug() << __PRETTY_FUNCTION__;
118 for (int x = m_viewTilesGrid.left(); x <= m_viewTilesGrid.right(); x++) {
119 for (int y = m_viewTilesGrid.top(); y <= m_viewTilesGrid.bottom(); y++) {
120 if (!m_mapTilesInScene.contains(MapEngine::tilePath(m_zoomLevel, x, y)))
125 foreach(MapTile *tile, m_mapTilesInScene) {
126 if (tile->zoomLevel() != m_zoomLevel) {
128 qDebug() << __PRETTY_FUNCTION__ << "removed other level tile";
133 void MapScene::removeOutOfViewTiles(QRect tilesGrid, int zoomLevel)
135 qDebug() << __PRETTY_FUNCTION__;
137 QList<QGraphicsItem *> viewItems = items(m_tilesSceneRect, Qt::IntersectsItemBoundingRect);
138 QList<QGraphicsItem *> allItems = items();
140 //Remove tiles which are in view from allTiles
141 foreach (QGraphicsItem *item, viewItems)
142 allItems.removeOne(item);
144 // note: add 1 so odd values are rounded up
145 int tilesGridWidthHalf = (tilesGrid.width() + 1) / 2;
147 // if view is near east limit of the map, then there is duplicate tiles also on the opposite
148 // side of the world which are removed from allTiles
149 if (tilesGrid.right() > (MapEngine::tileMaxIndex(zoomLevel) - tilesGridWidthHalf + MAP_GRID_PADDING)) {
150 QRect oppositeRect = m_tilesSceneRect;
151 oppositeRect.translate(-OSM_MAP_PIXELS_X, 0);
152 QList<QGraphicsItem *> oppositeItems = items(oppositeRect, Qt::IntersectsItemBoundingRect);
153 foreach (QGraphicsItem *item, oppositeItems)
154 allItems.removeOne(item);
157 // if view is near west limit of the map, then there is duplicate tiles also on the opposite
158 // side of the world which are removed from allTiles
159 if (tilesGrid.left() < (tilesGridWidthHalf - MAP_GRID_PADDING)) {
160 QRect oppositeRect = m_tilesSceneRect;
161 oppositeRect.translate(OSM_MAP_PIXELS_X, 0);
162 QList<QGraphicsItem *> oppositeItems = items(oppositeRect, Qt::IntersectsItemBoundingRect);
163 foreach (QGraphicsItem *item, oppositeItems)
164 allItems.removeOne(item);
167 //Remove tiles out of view
168 foreach (QGraphicsItem *item, allItems) {
169 MapTile *tile = dynamic_cast<MapTile *>(item);
175 void MapScene::removeStackedTiles(MapTile *newTile)
177 qDebug() << __PRETTY_FUNCTION__;
179 QRectF newTileSceneRect = newTile->sceneBoundingRect();
181 //Loop all items under new tile
182 QList<QGraphicsItem *> collidingItems = newTile->collidingItems(Qt::IntersectsItemBoundingRect);
183 foreach (QGraphicsItem *collidingItem, collidingItems) {
184 MapTile *collidingTile = dynamic_cast<MapTile *>(collidingItem);
186 if (newTile->zValue() > collidingTile->zValue()) {
187 // remove tile if it is fully obscured by new tile
188 QRectF collidingTileSceneRect = collidingTile->sceneBoundingRect();
189 if (newTileSceneRect.contains(collidingTileSceneRect))
190 removeTile(collidingTile);
196 void MapScene::removeTile(MapTile *tile)
198 qDebug() << __PRETTY_FUNCTION__;
200 m_mapTilesInScene.remove(MapEngine::tilePath(tile->zoomLevel(),
201 tile->tileNumber().x(),
202 tile->tileNumber().y()));
204 m_removeStackedTilesList.removeAll(tile);
207 qDebug() << __PRETTY_FUNCTION__ << "tiles count:" << m_mapTilesInScene.count();
210 void MapScene::setSceneVerticalOverlap(int viewHeight, int zoomLevel)
212 qDebug() << __PRETTY_FUNCTION__;
214 int overlap = viewHeight / 2 * (1 << (OSM_MAX_ZOOM_LEVEL - zoomLevel));
216 QRect rect = sceneRect().toRect();
217 rect.setTop(OSM_MAP_MIN_PIXEL_Y - overlap);
218 rect.setBottom(OSM_MAP_MAX_PIXEL_Y + overlap);
222 void MapScene::setTilesDrawingLevels(int zoomLevel)
224 qDebug() << __PRETTY_FUNCTION__ << "zoomLevel:" << zoomLevel;
226 QList<QGraphicsItem *> allItems = items();
228 for (int i = 0; i < allItems.size(); ++i) {
229 MapTile *item = dynamic_cast<MapTile *>(allItems.at(i));
231 item->setSceneLevel(zoomLevel);
235 void MapScene::setTilesGrid(QRect grid)
237 qDebug() << __PRETTY_FUNCTION__ ;
239 m_viewTilesGrid = grid;
242 void MapScene::setZoomLevel(int zoomLevel)
244 qDebug() << __PRETTY_FUNCTION__ ;
246 m_zoomLevel = zoomLevel;
249 void MapScene::spanItems(QRectF viewSceneRect)
251 qDebug() << __PRETTY_FUNCTION__;
253 // create rects for left and right side
254 QRect leftRect = sceneRect().toRect(); // this way we get the horizontal limits of the scene
255 leftRect.setTop(OSM_MAP_MIN_PIXEL_Y);
256 leftRect.setBottom(OSM_MAP_MAX_PIXEL_Y);
257 QRect rightRect = leftRect;
259 // limit rects to include only area which really must be moved
260 leftRect.setRight(-1 - (OSM_MAP_PIXELS_X - 1 - viewSceneRect.right()));
261 rightRect.setLeft(OSM_MAP_PIXELS_X + viewSceneRect.left());
263 Q_ASSERT_X(leftRect.right() < viewSceneRect.left(), "spanning rect right value", "move rect is in the view area");
264 Q_ASSERT_X(rightRect.left() > viewSceneRect.right(), "spanning rect left value", "move rect is in the view area");
266 // move all items which intersects the rects
267 if (leftRect.left() < leftRect.right())
268 moveIntersectingItemsHorizontally(leftRect, OSM_MAP_PIXELS_X);
269 if (rightRect.left() < rightRect.right())
270 moveIntersectingItemsHorizontally(rightRect, -OSM_MAP_PIXELS_X);
273 void MapScene::tilesSceneRectUpdated(QRect tilesSceneRect)
275 qDebug() << __PRETTY_FUNCTION__;
277 m_tilesSceneRect = tilesSceneRect;