Added basic zoom functionality.

Author: Jabbath

index.html

@@ -20,4 +20,5 @@
     <script src = "src/creator.js"></script>
     <script src = "src/fileWrite.js"></script>
     <script src = "src/menu.js"></script>
+    <script src = "src/ui.js"></script>
 </html>

package.json

@@ -1,6 +1,6 @@
 {
     "name": "graph-creator",
-    "version": "0.3.3",
+    "version": "0.4.3",
     "main": "index.html",
     "window": {
         "height": 1024,

src/ui.js

@@ -0,0 +1,15 @@
+//Handles parts of the user interface like zoom and keyboard shortcuts
+
+//Change the zoom level upon ctrl + mousewheel
+const win = nw.Window.get();
+
+window.addEventListener('wheel', function(e){
+    if(e.ctrlKey){
+        if(e.deltaY > 0){
+            win.zoomLevel -= 0.5;
+        }
+        else{
+            win.zoomLevel += 0.5;
+        }
+    }
+});