Changeset 605

Timestamp:

07/17/08 00:09:34 (4 months ago)

Author:

tom

Message:

implemeting a tile pool for Map and TweenMap? ... if you override createTile you should check the Map and TweenMap? implementations to see how to take advantage of the pool

Files:

• branches/tom-tweenlite/lib/com/modestmaps/core/TileGrid.as (modified) (11 diffs)
• branches/tom-tweenlite/lib/com/modestmaps/Map.as (modified) (2 diffs)
• branches/tom-tweenlite/lib/com/modestmaps/TweenMap.as (modified) (1 diff)

branches/tom-tweenlite/lib/com/modestmaps/core/TileGrid.as

@@ -164 +164 @@
-
-                        this.tileQueue = new TileQueue();
-
+map
-
-                        doubleClickEnabled = true;
@@ -233 +233 @@
-                        
-                        if (debugField.parent) {
-
+
+
+
-                                                + "\nfps: " + fps.toFixed(0)
-                                                + "\ncurrent child count: " + well.numChildren
@@ -242 +244 @@
-                                                + "\nfinished tiles: " + tileCache.size
-                                                + "\nrecently used tiles: " + recentlySeen.length
+                                                + "\nTiles created: " + map.tileCount
-                                                + "\nmemory: " + (System.totalMemory/1048576).toFixed(1) + "MB";
-                                debugField.width = debugField.textWidth+8;
-                                debugField.height = debugField.textHeight+4;
+                                debugField.x = mapWidth - debugField.width - 15; 
+                                debugField.y = mapHeight - debugField.height - 15;
-                        }
-                        
@@ -446 +451 @@
-                        }
-
+/*                      trace((maxCol - minCol + 1) * (maxRow - minRow + 1), "tiles visible at currentZoom");
+                        trace(visibleTiles.length, " tiles visible"); */
+
-                        // make absolutlely sure all our newly visible tiles are cached if they're done loading
-                        // TODO: this should probably happen onLoadEnd when there are no URLs left? 
@@ -466 +474 @@
-                                        well.removeChild(tile);
-                                        tile.hide();
-
-
+
+
+
+
+
+
+
+
-                                                
-                        // sort children by difference from current zoom level
@@ -491 +505 @@
-                                var tileScale:Number = Math.pow(2, zoomLevel-tile.zoom);
-                                tileScale = Math.ceil(tileScale * tileWidth) / tileWidth; // round up to the nearest pixel
-
-
-
-
-
-
+
-                        }
-                        
-                        // all the visible tiles will be at the end of recentlySeen
-                        // let's make sure we keep them around:
-
+
+
+
+
-                        
-                        // prune cache of already seen tiles if it's getting too big:
-                        if (recentlySeen.length > maxRecentlySeen) {
+                                //trace("... and that's too big");                              
+
-                                // throw away keys at the beginning of recentlySeen
-
+
+
+
+
+
+
-                                // loop over our internal tile cache 
-                                // and throw out tiles not in recentlySeen
-                                tileCache.retainKeys(recentlySeen); 
+
+//                              trace("to", tileCache.size);
-                        }
-                        
@@ -979 +1000 @@
-                        
-                        while (well.numChildren > 0) {                  
-
+
+
+
+
-                        }
-                        
@@ -1180 +1204 @@
-
-import com.modestmaps.core.Tile;
-
+
+
-
-class TileQueue
@@ -1232 +1257 @@
-        // Tiles we've already seen and fully loaded, by key (.name)
-        protected var alreadySeen:Dictionary;
-
-
-
+
+
+
+
+
-                alreadySeen = new Dictionary();
-        }
@@ -1267 +1294 @@
-                for (var key:String in alreadySeen) {
-                        if (keys.indexOf(key) < 0) {
+                                map.destroyTile(alreadySeen[key] as Tile);
-                                delete alreadySeen[key];
-                        }
@@ -1275 +1303 @@
-        {
-                for (var key:String in alreadySeen) {
+                        map.destroyTile(alreadySeen[key] as Tile);
-                        delete alreadySeen[key];
-                }

branches/tom-tweenlite/lib/com/modestmaps/Map.as

@@ -156 +156 @@
-                        setExtent(extent);                      
-                }
+                
+                //addChild(grid.debugField);
-        }
-        
@@ -841 +843 @@
-        }
-
+                protected var tilePool:Array = [];
+                public var tileCount:int = 0;
+
+                protected function getTileFromPool(column:int, row:int, zoom:int):Tile
+                {
+                if (tilePool.length > 0) {
+                        var tile:Tile = tilePool.shift() as Tile;
+                        tile.row = row;
+                        tile.column = column;
+                        tile.zoom = zoom;
+                        tile.hide();
+                        return tile;
+                }                                               
+                return null;
+                }
+
-                /** override this if you want to create your own tiles */
-            public function createTile(column:int, row:int, zoom:int):Tile
-            {
+                var tile:Tile = getTileFromPool(column, row, zoom);
+                if (tile) {
+                        return tile;
+                }
+                trace("made", tileCount++, "tiles");
-                return new Tile(column, row, zoom);
+            }        
+
+                /** once TileGrid is done with a tile, it will hand it back to you */
+            public function destroyTile(tile:Tile):void
+            {
+                while (tile.numChildren > 0) {
+                        tile.removeChildAt(0);
+                }
+                tilePool.push(tile);
-            }        
-                

branches/tom-tweenlite/lib/com/modestmaps/TweenMap.as

@@ -257 +257 @@
-                override public function createTile(column:int, row:int, zoom:int):Tile
-                {
+                        var tile:Tile = getTileFromPool(column, row, zoom);
+                if (tile) {
+                        return tile;
+                }                       
+                tileCount++;
-                        return new TweenTile(column, row, zoom);
-                }