in the beginning

src/util.js

@@ -0,0 +1,94 @@
+/**
+ * Util classes
+ */
+
+function Scheduler(closures, interval, type) {
+  if (!closures || !closures.length || !interval || !type) {
+    throw new Error('invalid params');
+  }
+
+  this.done = false;
+  this.closures = closures;
+  this.interval = interval;
+  this.type = type;
+  this.timeOut = null;
+  this.index = 0;
+
+  ee.addListener('scheduler_stop', this.stopSchedule, this);
+}
+
+Scheduler.prototype.start = function() {
+  // set the first interval
+  this.index = 0;
+  this.done = false;
+  this.setNext();
+};
+
+Scheduler.prototype.setNext = function(interval) {
+  var _this = this;
+  this.timeOut = setTimeout(function() {
+    _this.step();
+  }, interval || this.interval);
+};
+
+Scheduler.prototype.stopSchedule = function(type) {
+  console.log('received event signal');
+  if (type == 'all' || type == this.type) {
+    // either of these should work...
+    this.done = true;
+    clearTimeout(this.timeOut);
+  }
+};
+
+Scheduler.prototype.step = function() {
+  if (this.done) {
+    return;
+  }
+
+  //console.log(this.type + ' is stepping with index ' + this.index);
+  var results = this.closures[this.index]() || {};
+  this.index++;
+
+  if (results.done || this.index >= this.closures.length) {
+    this.done = true;
+    return;
+  }
+  this.setNext(results.interval);
+};
+
+/**
+ * Constants....!!!
+ */
+var constants = {
+  clickDragMass: 20,
+  baseMass: 1,
+};
+
+var time = {
+  edgeAddInterval: 200,
+  breathePeriod: 0.3
+};
+
+/**
+ * Graphics style
+ */
+var graphics = {
+  // colors
+  edgeStroke: 'rgba(94%, 96%, 98%, 0.5)', // '#EFF5FB',
+  nodeEdge: 'rgba(94%, 96%, 98%, 0.9)', // '#EFF5FB',
+  nodeFill: '#0066cc',
+
+  // widths
+  nodeStrokeWidth: 15,
+  edgeWidth: 2,
+};
+
+function randomString(string_length) {
+  var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
+  var randomstring = '';
+  for (var i=0; i<string_length; i++) {
+    var rnum = Math.floor(Math.random() * chars.length);
+    randomstring += chars.substring(rnum,rnum+1);
+  }
+  return randomstring;
+}