Merge pull request #818 from twpayne/view2d-properties

View2D properties

src/ol/interaction/dragpaninteraction.js

@@ -61,10 +61,12 @@ ol.interaction.DragPan.prototype.handleDrag = function(mapBrowserEvent) {
   // FIXME works for View2D only
   var view = map.getView();
   goog.asserts.assertInstanceof(view, ol.View2D);
-  var resolution = view.getResolution();
-  var rotation = view.getRotation();
-  var newCenter = [-resolution * this.deltaX, resolution * this.deltaY];
-  ol.coordinate.rotate(newCenter, rotation);
+  var view2DState = view.getView2DState();
+  var newCenter = [
+    -view2DState.resolution * this.deltaX,
+    view2DState.resolution * this.deltaY
+  ];
+  ol.coordinate.rotate(newCenter, view2DState.rotation);
   ol.coordinate.add(newCenter, this.startCenter);
   map.requestRenderFrame();
   view.setCenter(newCenter);

src/ol/interaction/keyboardpaninteraction.js

@@ -64,9 +64,8 @@ ol.interaction.KeyboardPan.prototype.handleMapBrowserEvent =
       // FIXME works for View2D only
       var view = map.getView();
       goog.asserts.assertInstanceof(view, ol.View2D);
-      var resolution = view.getResolution();
-      var rotation = view.getRotation();
-      var mapUnitsDelta = resolution * this.delta_;
+      var view2DState = view.getView2DState();
+      var mapUnitsDelta = view2DState.resolution * this.delta_;
       var deltaX = 0, deltaY = 0;
       if (keyCode == goog.events.KeyCodes.DOWN) {
         deltaY = -mapUnitsDelta;
@@ -78,7 +77,7 @@ ol.interaction.KeyboardPan.prototype.handleMapBrowserEvent =
         deltaY = mapUnitsDelta;
       }
       var delta = [deltaX, deltaY];
-      ol.coordinate.rotate(delta, rotation);
+      ol.coordinate.rotate(delta, view2DState.rotation);
       ol.interaction.Interaction.pan(
           map, view, delta, ol.interaction.KEYBOARD_PAN_DURATION);
       mapBrowserEvent.preventDefault();

src/ol/view2d.js

@@ -89,7 +89,8 @@ ol.View2D = function(opt_options) {
     values[ol.View2DProperty.RESOLUTION] = resolutionConstraint(
         this.maxResolution_, options.zoom);
   }
-  values[ol.View2DProperty.ROTATION] = options.rotation;
+  values[ol.View2DProperty.ROTATION] =
+      goog.isDef(options.rotation) ? options.rotation : 0;
   this.setValues(values);
 };
 goog.inherits(ol.View2D, ol.View);
@@ -254,12 +255,10 @@ ol.View2D.prototype.getResolutionForValueFunction = function(opt_power) {
 
 
 /**
- * Get the current rotation of this view.
- * @return {number} Map rotation.
+ * @inheritDoc
  */
 ol.View2D.prototype.getRotation = function() {
-  return /** @type {number|undefined} */ (
-      this.get(ol.View2DProperty.ROTATION)) || 0;
+  return /** @type {number|undefined} */ (this.get(ol.View2DProperty.ROTATION));
 };
 goog.exportProperty(
     ol.View2D.prototype,
@@ -306,14 +305,14 @@ ol.View2D.prototype.getView2D = function() {
 ol.View2D.prototype.getView2DState = function() {
   goog.asserts.assert(this.isDef());
   var center = /** @type {ol.Coordinate} */ (this.getCenter());
-  var projection = /** @type {ol.Projection} */ (this.getProjection());
+  var projection = this.getProjection();
   var resolution = /** @type {number} */ (this.getResolution());
-  var rotation = /** @type {number} */ (this.getRotation());
+  var rotation = this.getRotation();
   return {
     center: center.slice(),
-    projection: projection,
+    projection: goog.isDef(projection) ? projection : null,
     resolution: resolution,
-    rotation: rotation
+    rotation: goog.isDef(rotation) ? rotation : 0
   };
 };