Do not refresh graph if settings weren't changed

Author: nikitaeverywhere

README.md

@@ -29,7 +29,7 @@ Usage
 Development
 -----------
 
-Requires [Node.JS](https://nodejs.org) (v0.10.0-6.2.2+),
+Requires [Node.JS](https://nodejs.org) (v4.0.0-7.5.0+) (but may work on previous versions),
 [Git](https://git-scm.com) and
 [Caché](http://www.intersystems.com/library/software-downloads/) 2017.1+
 to be installed.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "iknow-entity-browser",
-  "version": "0.6.2",
+  "version": "0.6.3",
   "description": "Visualizer for iKnow entities",
   "main": "gulpfile.babel.js",
   "scripts": {

src/static/js/settings/index.js

@@ -1,11 +1,13 @@
 import * as model from "../model";
 import * as graph from "../graph";
+import { getChanges, applyChanges } from "../source";
 
 function toggleSettings (uiStateModel) {
     uiStateModel.settingsToggled = !uiStateModel.settingsToggled;
     d3.select("#settings").classed("active", uiStateModel.settingsToggled);
     d3.select("#windows").classed("offScreen", uiStateModel.settingsToggled);
-    if (!uiStateModel.settingsToggled) {
+    if (!uiStateModel.settingsToggled && getChanges().length !== 0) {
+        applyChanges();
         model.update(() => graph.update(true));
     }
 }

src/static/js/source/index.js

@@ -11,12 +11,27 @@ let settings = { // assign defaults here
     queryType: "related",
     seed: "crew"
 };
+let changes = [];
 
 let initialStorage = storage.load(STORAGE_KEY);
 for (let option in initialStorage) {
     settings[option] = initialStorage[option];
 }
 
+/**
+ * This function "applies" settings so that getChanges() will return empty array until
+ */
+export function applyChanges () {
+    changes = [];
+}
+
+/**
+ * @returns {string[]} of changed keys.
+ */
+export function getChanges () {
+    return changes;
+}
+
 export function getOption (opt) {
     return settings[opt];
 }
@@ -63,7 +78,7 @@ function setValue (e = {}) {
     if ((id = el.getAttribute(`id`)).indexOf(`settings.`) === 0) {
         let key = id.replace(/^settings\./, ``);
         if (isEvent) {
-            settings[key] = el.value;
+            changes.push(settings[key] = el.value);
             saveSettings();
         } else {
             el.value = settings[key];