Merge pull request #688 from fredj/mouse-position

Add ol.control.MousePosition.setProjection

src/ol/control/mousepositioncontrol.exports

@@ -1,2 +1,4 @@
 @exportClass ol.control.MousePosition ol.control.MousePositionOptions
 @exportProperty ol.control.MousePosition.prototype.setMap
+@exportProperty ol.control.MousePosition.prototype.getProjection
+@exportProperty ol.control.MousePosition.prototype.setProjection

src/ol/control/mousepositioncontrol.js

@@ -86,15 +86,9 @@ ol.control.MousePosition = function(opt_options) {
 
   /**
    * @private
-   * @type {ol.TransformFunction}
+   * @type {?ol.TransformFunction}
    */
-  this.transform_ = ol.proj.identityTransform;
-
-  /**
-   * @private
-   * @type {ol.Projection}
-   */
-  this.renderedProjection_ = null;
+  this.transform_ = null;
 
   /**
    * @private
@@ -114,12 +108,23 @@ ol.control.MousePosition.prototype.handleMapPostrender = function(mapEvent) {
   if (goog.isNull(frameState)) {
     this.mapProjection_ = null;
   } else {
-    this.mapProjection_ = frameState.view2DState.projection;
+    if (this.mapProjection_ != frameState.view2DState.projection) {
+      this.mapProjection_ = frameState.view2DState.projection;
+      this.transform_ = null;
+    }
   }
   this.updateHTML_(this.lastMouseMovePixel_);
 };
 
 
+/**
+ * @return {ol.Projection} projection.
+ */
+ol.control.MousePosition.prototype.getProjection = function() {
+  return this.projection_;
+};
+
+
 /**
  * @param {goog.events.BrowserEvent} browserEvent Browser event.
  * @protected
@@ -160,6 +165,15 @@ ol.control.MousePosition.prototype.setMap = function(map) {
 };
 
 
+/**
+ * @param {ol.ProjectionLike} projection Projection.
+ */
+ol.control.MousePosition.prototype.setProjection = function(projection) {
+  this.projection_ = ol.proj.get(projection);
+  this.transform_ = null;
+};
+
+
 /**
  * @param {?ol.Pixel} pixel Pixel.
  * @private
@@ -167,14 +181,13 @@ ol.control.MousePosition.prototype.setMap = function(map) {
 ol.control.MousePosition.prototype.updateHTML_ = function(pixel) {
   var html = this.undefinedHTML_;
   if (!goog.isNull(pixel)) {
-    if (this.renderedProjection_ != this.mapProjection_) {
+    if (goog.isNull(this.transform_)) {
       if (!goog.isNull(this.projection_)) {
         this.transform_ = ol.proj.getTransformFromProjections(
             this.mapProjection_, this.projection_);
       } else {
         this.transform_ = ol.proj.identityTransform;
       }
-      this.renderedProjection_ = this.mapProjection_;
     }
     var map = this.getMap();
     var coordinate = map.getCoordinateFromPixel(pixel);