[Fixed Position] Position elements where dropped

Position elements where they are dropped in Fixed Position
view, WTD-877

platform/features/layout/src/FixedController.js

@@ -147,6 +147,26 @@ define(
                     telemetrySubscriber.subscribe(domainObject, updateValues);
             }
 
+            // Position a panel after a drop event
+            function handleDrop(e, id, position) {
+                // Make sure there is a "elements" field in the
+                // view configuration.
+                $scope.configuration.elements =
+                    $scope.configuration.elements || {};
+                // Store the position of this element.
+                $scope.configuration.elements[id] = {
+                    position: [
+                        Math.floor(position.x / gridSize[0]),
+                        Math.floor(position.y / gridSize[1])
+                    ],
+                    dimensions: DEFAULT_DIMENSIONS
+                };
+                // Mark change as persistable
+                if ($scope.commit) {
+                    $scope.commit("Dropped a frame.");
+                }
+            }
+
             // Position panes when the model field changes
             $scope.$watch("model", lookupPanels);
 
@@ -156,6 +176,9 @@ define(
             // Free up subscription on destroy
             $scope.$on("$destroy", releaseSubscription);
 
+            // Position panes where they are dropped
+            $scope.$on("mctDrop", handleDrop);
+
             // Initialize styles (position etc.) for cells
             refreshCellStyles();