Merge pull request #4362 from tamarmot/rotate_reset_north

Rotate control now takes optional resetNorth function.

externs/olx.js

@@ -1315,6 +1315,7 @@ olx.control.ScaleLineOptions.prototype.units;
  *     tipLabel: (string|undefined),
  *     target: (Element|undefined),
  *     render: (function(ol.MapEvent)|undefined),
+ *     resetNorth: (function()|undefined),
  *     autoHide: (boolean|undefined)}}
  * @api stable
  */
@@ -1371,6 +1372,15 @@ olx.control.RotateOptions.prototype.autoHide;
 olx.control.RotateOptions.prototype.render;
 
 
+/**
+ * Function called when the control is clicked. This will override the 
+ * default resetNorth.
+ * @type {function()|undefined}
+ * @api
+ */
+olx.control.RotateOptions.prototype.resetNorth;
+
+
 /**
  * Target.
  * @type {Element|undefined}

src/ol/control/rotatecontrol.js

@@ -63,6 +63,8 @@ ol.control.Rotate = function(opt_options) {
 
   var render = options.render ? options.render : ol.control.Rotate.render;
 
+  this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;
+
   goog.base(this, {
     element: element,
     render: render,
@@ -101,7 +103,11 @@ goog.inherits(ol.control.Rotate, ol.control.Control);
  */
 ol.control.Rotate.prototype.handleClick_ = function(event) {
   event.preventDefault();
-  this.resetNorth_();
+  if (this.callResetNorth_ !== undefined) {
+    this.callResetNorth_();
+  } else {
+    this.resetNorth_();
+  }
 };