Add ol.interaction.Interaction#setActive and #getActive

src/ol/interaction/interaction.js

@@ -34,10 +34,25 @@ ol.interaction.Interaction = function() {
    */
   this.map_ = null;
 
+  /**
+   * @private
+   * @type {boolean}
+   */
+  this.active_ = true;
+
 };
 goog.inherits(ol.interaction.Interaction, ol.Observable);
 
 
+/**
+ * @return {boolean} `true` if the interaction is active, `false` otherwise.
+ * @api
+ */
+ol.interaction.Interaction.prototype.getActive = function() {
+  return this.active_;
+};
+
+
 /**
  * Get the map associated with this interaction.
  * @return {ol.Map} Map.
@@ -57,6 +72,16 @@ ol.interaction.Interaction.prototype.handleMapBrowserEvent =
     goog.abstractMethod;
 
 
+/**
+ * Activate or deactivate the interaction.
+ * @param {boolean} active Active.
+ * @api
+ */
+ol.interaction.Interaction.prototype.setActive = function(active) {
+  this.active_ = active;
+};
+
+
 /**
  * Remove the interaction from its current map and attach it to the new map.
  * Subclasses may set up event handlers to get notified about changes to