Moved source into separate src directory due to popular request

[GpsPrune.git] / tim / prune / gui / map / MemTileCacher.java

diff --git a/tim/prune/gui/map/MemTileCacher.java b/tim/prune/gui/map/MemTileCacher.java
deleted file mode 100644 (file)
index 20d7a21..0000000
--- a/tim/prune/gui/map/MemTileCacher.java
+++ /dev/null
@@ -1,134 +0,0 @@
-package tim.prune.gui.map;
-
-import java.awt.Image;
-
-/**
- * Class to act as a memory-based map tile cache
- * For caching of tiles on disk, see the DiskTileCacher class.
- */
-public class MemTileCacher
-{
-       /** Array of images to hold tiles */
-       private Image[] _tiles = new Image[GRID_SIZE * GRID_SIZE];
-       /** Current zoom level */
-       private int _zoom = -1;
-       /** X coordinate of central tile */
-       private int _tileX = -1;
-       /** Y coordinate of central tile */
-       private int _tileY = -1;
-       /** X coord of grid centre */
-       private int _gridCentreX = 0;
-       /** Y coord of grid centre */
-       private int _gridCentreY = 0;
-
-       /** Grid size */
-       private static final int GRID_SIZE = 15;
-
-       /**
-        * Recentre the map and clear the cache
-        * @param inZoom zoom level
-        * @param inTileX x coord of central tile
-        * @param inTileY y coord of central tile
-        */
-       public void centreMap(int inZoom, int inTileX, int inTileY)
-       {
-               int shift = Math.max(Math.abs(inTileX-_tileX), Math.abs(inTileY - _tileY));
-               if (shift == 0) {return;}
-               // Clear cache if either zoom has changed or map has jumped too far
-               if (inZoom != _zoom || shift > GRID_SIZE/2)
-               {
-                       _zoom = inZoom;
-                       clearAll();
-               }
-               _gridCentreX = getCacheCoordinate(_gridCentreX + inTileX - _tileX);
-               _gridCentreY = getCacheCoordinate(_gridCentreY + inTileY - _tileY);
-               _tileX = inTileX;
-               _tileY = inTileY;
-               // Mark boundaries as invalid
-               for (int i=0; i<GRID_SIZE; i++)
-               {
-                       _tiles[getArrayIndexNoWrap(_tileX + GRID_SIZE/2 + 1, _tileY + i - GRID_SIZE/2)] = null;
-                       _tiles[getArrayIndexNoWrap(_tileX + i - GRID_SIZE/2, _tileY + GRID_SIZE/2 + 1)] = null;
-               }
-       }
-
-       /**
-        * Transform a coordinate from map tiles to array coordinates
-        * @param inTile coordinate of tile
-        * @return coordinate in array (wrapping around cache grid)
-        */
-       private static int getCacheCoordinate(int inTile)
-       {
-               int tile = inTile;
-               while (tile >= GRID_SIZE) {tile -= GRID_SIZE;}
-               while (tile < 0) {tile += GRID_SIZE;}
-               return tile;
-       }
-
-       /**
-        * Get the array index for the given coordinates, including regular lon wrapping
-        * @param inX x coord of tile
-        * @param inY y coord of tile
-        * @return array index
-        */
-       private int getArrayIndex(int inX, int inY)
-       {
-               final int tileSpan = 1 << _zoom;
-               int deltaX = (inX - _tileX);
-               while (deltaX > (tileSpan/2))  {deltaX -= tileSpan;}
-               while (deltaX < (-tileSpan/2)) {deltaX += tileSpan;}
-
-               int x = getCacheCoordinate(deltaX + _gridCentreX);
-               int y = getCacheCoordinate(inY - _tileY + _gridCentreY);
-               return (x + y * GRID_SIZE);
-       }
-
-       /**
-        * Get the array index for the given coordinates, without wrapping x coords
-        * (used for deletion to avoid deleting the wrong tile)
-        * @param inX x coord of tile
-        * @param inY y coord of tile
-        * @return array index
-        */
-       private int getArrayIndexNoWrap(int inX, int inY)
-       {
-               int x = getCacheCoordinate(inX - _tileX + _gridCentreX);
-               int y = getCacheCoordinate(inY - _tileY + _gridCentreY);
-               return (x + y * GRID_SIZE);
-       }
-
-       /**
-        * Clear all the cached images
-        */
-       public void clearAll()
-       {
-               for (int i=0; i<_tiles.length; i++) {
-                       _tiles[i] = null;
-               }
-       }
-
-       /**
-        * @param inX x index of tile
-        * @param inY y index of tile
-        * @return selected tile if already loaded, or null otherwise
-        */
-       public Image getTile(int inX, int inY)
-       {
-               return _tiles[getArrayIndex(inX, inY)];
-       }
-
-       /**
-        * Save the specified tile at the given coordinates
-        * @param inTile image to save
-        * @param inX x coordinate of tile
-        * @param inY y coordinate of tile
-        * @param inZoom zoom level
-        */
-       public void setTile(Image inTile, int inX, int inY, int inZoom)
-       {
-               // Ignore images received for a different zoom level
-               if (inZoom == _zoom) {
-                       _tiles[getArrayIndex(inX, inY)] = inTile;
-               }
-       }
-}