use fullData item _index field for curveNumber gl2d event data

Author: etpinard

src/plots/gl2d/scene2d.js

@@ -51,7 +51,6 @@ function Scene2D(options, fullLayout) {
 
     // trace set
     this.traces = {};
-    this._inputs = {};
 
     // create axes spikes
     this.spikes = createSpikes(this.glplot);
@@ -362,7 +361,6 @@ proto.destroy = function() {
     this.container.removeChild(this.mouseContainer);
 
     this.fullData = null;
-    this._inputs = null;
     this.glplot = null;
     this.stopped = true;
 };
@@ -487,7 +485,6 @@ proto.updateTraces = function(fullData, calcData) {
     // update / create trace objects
     for(i = 0; i < fullData.length; i++) {
         fullTrace = fullData[i];
-        this._inputs[fullTrace.uid] = i;
         var calcTrace = calcData[i],
             traceObj = this.traces[fullTrace.uid];
 
@@ -500,16 +497,22 @@ proto.updateTraces = function(fullData, calcData) {
 };
 
 proto.emitPointAction = function(nextSelection, eventType) {
+    var uid = nextSelection.trace.uid;
+    var trace;
 
-    var curveIndex = this._inputs[nextSelection.trace.uid];
+    for(var i = 0; i < this.fullData.length; i++) {
+        if(this.fullData[i].uid === uid) {
+            trace = this.fullData[i];
+        }
+    }
 
     this.graphDiv.emit(eventType, {
         points: [{
             x: nextSelection.traceCoord[0],
             y: nextSelection.traceCoord[1],
-            curveNumber: curveIndex,
+            curveNumber: trace.index,
             pointNumber: nextSelection.pointIndex,
-            data: this.fullData[curveIndex]._input,
+            data: trace._input,
             fullData: this.fullData,
             xaxis: this.xaxis,
             yaxis: this.yaxis