#include "common.h"
#include "mapfetcher.h"
#include "mapscene.h"
+#include "maptile.h"
/**
* @brief Map engine
* @param parent Parent
*/
MapEngine(QObject *parent = 0);
+
+ /**
+ * @brief MapEngine initializer
+ *
+ * Set initial location and zoom level for the engine. locationChanged and
+ * zoomLevelChanged signals are emitted, so init should be called after
+ * those signals are connected to MapView.
+ */
+ void init();
/**
* @brief Convert tile x & y numbers to MapScene coordinates
static QPoint convertTileNumberToSceneCoordinate(int zoomLevel, QPoint tileNumber)
{
- int pow = 1 << (MAX_ZOOM_LEVEL - zoomLevel);
+ int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
int x = tileNumber.x() * TILE_SIZE_X * pow;
int y = tileNumber.y() * TILE_SIZE_Y * pow;
return QPoint(x, y);
}
+ static QPoint convertSceneCoordinateToTileNumber(int zoomLevel, QPointF sceneCoordinate)
+ {
+ int pow = 1 << (MAX_MAP_ZOOM_LEVEL - zoomLevel);
+ int x = static_cast<int>(sceneCoordinate.x() / (TILE_SIZE_X*pow));
+ int y = static_cast<int>(sceneCoordinate.y() / (TILE_SIZE_Y*pow));
+
+ return QPoint(x, y);
+ }
+
/**
* @brief Getter for scene
*
QGraphicsScene* scene();
/**
- * @brief Set view location
+ * @brief Helper for setting view location based on latitude and longitude
+ * coordinates
*
* @param latLonCoordinate Latitude & longitude coordinates for location
*/
/**
* @brief Converts latitude, longitude and zoom to tile x, y values.
*
- * @param zoomLevel zoom level
* @param latLonCoordinate latitude and longitude values
* @return QPoint tile x,y value
*/
- static QPoint convertLatLonToTile(int zoomLevel, QPointF latLonCoordinate) {
+ static QPointF convertLatLonToSceneCoordinate(QPointF latLonCoordinate)
+ {
+ /// @todo CREATE TEST CASE & CHECK CALCULATION
qDebug() << __PRETTY_FUNCTION__;
qreal longitude = latLonCoordinate.x();
qreal latitude = latLonCoordinate.y();
- qreal z = static_cast<qreal>(1 << zoomLevel);
+ if ((longitude > MAX_LONGITUDE) || (longitude < MIN_LONGITUDE))
+ return QPoint(UNDEFINED, UNDEFINED);
+ if ((latitude > MAX_LATITUDE) || (latitude < MIN_LATITUDE))
+ return QPoint(UNDEFINED, UNDEFINED);
+
+ qreal z = static_cast<qreal>(1 << MAX_MAP_ZOOM_LEVEL);
qreal x = static_cast<qreal>((longitude + 180.0) / 360.0);
qreal y = static_cast<qreal>((1.0 - log(tan(latitude * M_PI / 180.0) + 1.0
/ cos(latitude * M_PI / 180.0)) / M_PI) / 2.0);
- return QPoint(qFloor(x*z), qFloor(y*z));
+ return QPointF(x*z*TILE_SIZE_X, y*z*TILE_SIZE_Y);
}
+public slots:
+ /**
+ * @brief Slot for setting current view location
+ *
+ * Emits locationChanged signal.
+ * @param sceneCoordinate Scene coordinates for new position
+ */
+ void setLocation(QPointF sceneCoordinate);
+
+ void viewResized(const QSize &size);
+
private:
/**
* @brief Build URL for donwloading single map tile from OpenStreetMap tile server
*/
void parseURL(const QUrl &url, int &zoom, int &x, int &y);
+ /**
+ * @brief Set zValues for all tiles in the scene
+ *
+ * Drawing order of MapTiles, which has the zoom level higher than the current
+ * zoom level, is reversed and those MapTiles are mapped between lower level MapTiles.
+ * Example: If maximum zoom level is 18 and current view zoomlevel is 15, then
+ * the drawing order from top to bottom is 15, 16, 14, 17, 13, 18, 12, 11, 10, ...
+ */
+ void setZValues();
+
+ int tileMaxValue(int zoomLevel);
+
+ /**
+ * @brief Calculates grid of tile coordinates from current scene coordinate.
+ *
+ * Grid size is calculated from view size and scene's current center coordinate.
+ *
+ * @param sceneCoordinate scene's current center coordinate
+ * @return QRect grid of tile coordinates
+ */
+ QRect calculateGrid(QPointF sceneCoordinate);
+
+ /**
+ * @brief Calculate new tiles to fetch.
+ *
+ * @param sceneCoordinate scene's center coordinate
+ */
+ void calculateNewTiles(QPointF sceneCoordinate);
+
+ /**
+ * @brief Removes tiles which are out of view bounds.
+ */
+ void removeOldTiles();
+
+ /**
+ * @brief Checks if center tile has changed.
+ *
+ * @param sceneCoordinate scene's center coordinate
+ * @return bool true if center tile changed, false otherwise
+ */
+ bool centerTileChanged(QPointF sceneCoordinate);
+
private slots:
/**
* @brief Slot for received map tile images
*/
void mapImageReceived(const QUrl &url, const QPixmap &pixmap);
+ /**
+ * @brief Slot for zooming in
+ *
+ */
+ void zoomIn();
+
+ /**
+ * @brief Slot for zooming out
+ *
+ */
+ void zoomOut();
+
signals:
/**
+ * @brief Signal for view location change
+ *
+ * @param sceneCoordinate New scene coordinates
+ */
+ void locationChanged(QPointF sceneCoordinate);
+
+ /**
* @brief Signal for zoom level change
*
* @param newZoomLevel New zoom level
*/
void zoomLevelChanged(int newZoomLevel);
+ void fetchImage(const QUrl &url);
+
+ void centerToSceneCoordinates(QPointF sceneCoordinate);
+
private:
+
MapScene *m_mapScene; ///< Scene for map tiles
MapFetcher *m_mapFetcher; ///< Fetcher for map tiles
int m_zoomLevel; ///< Current zoom level
+ QHash<QString, MapTile *> mapTilesInScene; ///< List of map tiles in map scene
+ QSize m_viewSize;
+ QPointF m_sceneCoordinate;
+ QQueue<QString> mapTilesInView;
+ QPoint m_centerTile;
+ QRect viewGrid;
};
#endif // MAPENGINE_H
projects / situare / blobdiff