Merge pull request #4868 from sebasbaumh/refreshSource

Allow to refresh a source and reload its data.

src/ol/source/source.js

@@ -150,6 +150,15 @@ ol.source.Source.prototype.getWrapX = function() {
 };
 
 
+/**
+ * Refreshes the source and finally dispatches a 'change' event.
+ * @api
+ */
+ol.source.Source.prototype.refresh = function() {
+  this.changed();
+};
+
+
 /**
  * Set the attributions of the source.
  * @param {Array.<ol.Attribution>} attributions Attributions.

src/ol/source/tilesource.js

@@ -290,6 +290,15 @@ ol.source.Tile.prototype.getTileCoordForTileUrlFunction = function(tileCoord, op
 };
 
 
+/**
+ * @inheritDoc
+ */
+ol.source.Tile.prototype.refresh = function() {
+  this.tileCache.clear();
+  this.changed();
+};
+
+
 /**
  * Marks a tile coord as being used, without triggering a load.
  * @param {number} z Tile coordinate z.