Call cleanPlot from newPlot directly; Changed the location of the trace dispose loop; null -> delete

Author: monfera

src/plot_api/plot_api.js

@@ -835,6 +835,10 @@ Plotly.redraw = function(gd) {
  */
 Plotly.newPlot = function(gd, data, layout, config) {
     gd = getGraphDiv(gd);
+
+    // remove gl contexts
+    Plots.cleanPlot([], {}, gd._fullData || {}, gd._fullLayout || {});
+
     Plots.purge(gd);
     return Plotly.plot(gd, data, layout, config);
 };

src/plots/gl2d/scene2d.js

@@ -310,6 +310,16 @@ proto.cameraChanged = function() {
 };
 
 proto.destroy = function() {
+
+    var traces = this.traces;
+
+    if(traces) {
+        Object.keys(traces).map(function(key) {
+            traces[key].dispose();
+            delete traces[key];
+        });
+    }
+
     this.glplot.dispose();
 
     if(!this.staticPlot) this.container.removeChild(this.canvas);
@@ -318,14 +328,6 @@ proto.destroy = function() {
 
     this.glplot = null;
     this.stopped = true;
-
-    var traces = this.traces;
-    if(traces) {
-        Object.keys(traces).map(function(key) {
-            traces[key].dispose();
-            traces[key] = null;
-        });
-    }
 };
 
 proto.plot = function(fullData, calcData, fullLayout) {

src/plots/plots.js

@@ -809,16 +809,6 @@ plots.purge = function(gd) {
     // remove modebar
     if(fullLayout._modeBar) fullLayout._modeBar.destroy();
 
-    if(fullLayout._plots) {
-        Object.keys(fullLayout._plots).map(function(key) {
-            var plot = fullLayout._plots[key];
-            if(plot._scene2d) {
-                plot._scene2d.destroy();
-                plot._scene2d = null;
-            }
-        });
-    }
-
     // data and layout
     delete gd.data;
     delete gd.layout;