Add a settable key for all tile sources

The source's key is used as the key for all tiles in the source. For URL tile sources, the URL is the key.
2016-05-18 18:27:19 -06:00
parent 9f501aeb0e
commit f86e7e5a71
2 changed files with 30 additions and 9 deletions
@@ -67,6 +67,12 @@ ol.source.Tile = function(options) {
   */
  this.tmpSize = [0, 0];

+  /**
+   * @private
+   * @type {string}
+   */
+  this.key_ = '';
+
 };
 goog.inherits(ol.source.Tile, ol.source.Source);

@@ -144,7 +150,20 @@ ol.source.Tile.prototype.getGutter = function(projection) {
 * @protected
 */
 ol.source.Tile.prototype.getKeyParams = function() {
-  return '';
+  return this.key_;
+};
+
+
+/**
+ * Set the value to be used as the key for all tiles in the source.
+ * @param {string} key The key for tiles.
+ * @protected
+ */
+ol.source.Tile.prototype.setKey = function(key) {
+  if (this.key_ !== key) {
+    this.key_ = key;
+    this.changed();
+  }
 };