[OpenLayers-Commits] r12263 - sandbox/mpriour/temporal_map/openlayers/lib/OpenLayers/Tile

[commits-20090109 at openlayers.org]

Author: mpriour
Date: 2011-08-18 09:01:09 -0700 (Thu, 18 Aug 2011)
New Revision: 12263

Modified:
   sandbox/mpriour/temporal_map/openlayers/lib/OpenLayers/Tile/BackBufferable.js
Log:
Merge in ahoceavar's BackBufferable changes to create smooth refreshes for tiled layers

Modified: sandbox/mpriour/temporal_map/openlayers/lib/OpenLayers/Tile/BackBufferable.js
===================================================================
--- sandbox/mpriour/temporal_map/openlayers/lib/OpenLayers/Tile/BackBufferable.js	2011-08-18 15:51:45 UTC (rev 12262)
+++ sandbox/mpriour/temporal_map/openlayers/lib/OpenLayers/Tile/BackBufferable.js	2011-08-18 16:01:09 UTC (rev 12263)
@@ -116,16 +116,17 @@
     updateBackBuffer: function() {
         var layer = this.layer, map = layer.map,
             backBufferMode = this.backBufferMode,
-            data = this.backBufferData,
+            mode = this.backBufferMode,
             tile = this.getTile(),
             backBuffer = data.tile,
             resolution = data.resolution,
             ratio = resolution ? resolution / map.getResolution() : 1,
+            refresh = this.bounds.equals(data.bounds),
             
         // Cases where we don't position and return a back buffer, but only
         // update backBufferData and return undefined:
-            // (1) current ratio and backBufferMode dont't require a backbuffer
-            notNeeded = !(ratio == 1 ? backBufferMode & 1 : backBufferMode & 2),
+            // (1) current refresh/ratio/mode state doesn't require a buffer
+            notNeeded = !(ratio == 1 ? (refresh || mode & 1) : mode & 2),
             // (2) the tile is not appended to the layer's div
             noParent = tile && tile.parentNode !== layer.div,
             // (3) we don't have a tile available that we could use as buffer