Moving away from callback-based model loading.

public/main.js

@@ -13,15 +13,6 @@ let playing = false;
 // Project model/state
 let model = new Model();
 
-model.on('loading', () => {
-    // Stop playback to avoid glitching
-    stopPlayback();
-
-    // Show the Edit tab before loading the graph,
-    // so it can resize itself correctly
-    /* showTab('edit'); */
-});
-
 // Graph editor view
 let editor = new Editor(model);
 
@@ -36,21 +27,17 @@ document.body.onload = function ()
     if (window.location.hash)
         return;
 
-    let modelData = localStorage.getItem('model');
-    if (!modelData)
+    let serializedModelData = localStorage.getItem('latestModelData');
+    if (!serializedModelData)
         return;
 
-    if (model.deserialize(modelData)) {
-        console.log('model restored from previous session');
-    } else {
-        console.warn('could not restore model from previous session');
-    }
+    importModel(serializedModelData);
 }
 
 window.onunload = function ()
 {
     // Save the graph when unloading the page
-    localStorage.setItem('model', model.serialize());
+    localStorage.setItem('latestModelData', model.serialize());
 }
 
 window.onkeydown = function (event)
@@ -107,6 +94,18 @@ window.onkeydown = function (event)
     }
 }
 
+export function importModel(serializedModelData)
+{
+    // Stop playback to avoid glitching
+    stopPlayback();
+
+    if (model.deserialize(serializedModelData)) {
+        console.log('model restored from previous session');
+    } else {
+        console.warn('could not restore model from previous session');
+    }
+}
+
 export function startPlayback()
 {
     if (playing)

public/model.js

@@ -60,7 +60,6 @@ or it's a special undoable action.
 */
 
 import { assert, treeCopy, treeEq, isString, isObject } from './utils.js';
-import { Eventable } from './eventable.js';
 
 /**
  * High-level description/scheme for each type of node
@@ -639,12 +638,10 @@ export class Disconnect extends Action
 }
 
 /** Graph of nodes model, operates on internal state data */
-export class Model extends Eventable
+export class Model
 {
     constructor()
     {
-        super();
-
         // List of views subscribed to model updates
         this.views = [];
 
@@ -676,8 +673,6 @@ export class Model extends Eventable
     // Load the JSON state into the model
     load(state)
     {
-        this.emit('loading');
-
         // Current playback position
         this.playPos = 0;