support drawing tree of WeightedGraph

js/module/graph.js

@@ -59,6 +59,7 @@ GraphTracer.prototype.setTreeData = function (G, root) {
     if (this.setData(G, root)) return true;
 
     var place = function (node, x, y) {
+        console.log(node);
         var temp = graph.nodes(n(node));
         temp.x = x;
         temp.y = y;

js/script.js

@@ -20,6 +20,7 @@ dataEditor.on('change', function () {
 });
 
 var loadFile = function (category, algorithm, file, explanation) {
+    lastModule = null;
     lastData = null;
     $('#explanation').html(explanation);
     dataEditor.setValue('');

js/tracer.js

 var timer = null;
-var lastData = null;
+var lastModule = null, lastData = null;
 var stepLimit = 1e6;
 
 var Tracer = function (module) {
@@ -30,7 +30,8 @@ Tracer.prototype.createRandomData = function (arguments) {
 
 Tracer.prototype.setData = function (arguments) {
     var data = JSON.stringify(arguments);
-    if (lastData == data) return true;
+    if (lastModule == this.module && lastData == data) return true;
+    lastModule = this.module;
     lastData = data;
     return false;
 };