fix legend.traceorder when all traces are legendonly

Author: alexcjohnson

src/plots/plots.js

@@ -1482,7 +1482,10 @@ plots.supplyLayoutModuleDefaults = function(layoutIn, layoutOut, fullData, trans
     }
 
     // trace module layout defaults
-    var modules = layoutOut._visibleModules;
+    // use _modules rather than _visibleModules so that even
+    // legendonly traces can include settings - eg barmode, which affects
+    // legend.traceorder default value.
+    var modules = layoutOut._modules;
     for(i = 0; i < modules.length; i++) {
         _module = modules[i];
 

test/jasmine/tests/bar_test.js

@@ -1361,6 +1361,7 @@ describe('bar visibility toggling:', function() {
             spyOn(gd._fullData[0]._module, 'crossTraceCalc').and.callThrough();
 
             _assert('base', [0.5, 3.5], [-2.222, 2.222], 0);
+            expect(gd._fullLayout.legend.traceorder).toBe('normal');
             return Plotly.restyle(gd, 'visible', false, [1]);
         })
         .then(function() {
@@ -1369,6 +1370,11 @@ describe('bar visibility toggling:', function() {
         })
         .then(function() {
             _assert('both invisible', [0.5, 3.5], [0, 2.105], 0);
+            return Plotly.restyle(gd, 'visible', 'legendonly');
+        })
+        .then(function() {
+            _assert('both legendonly', [0.5, 3.5], [0, 2.105], 0);
+            expect(gd._fullLayout.legend.traceorder).toBe('normal');
             return Plotly.restyle(gd, 'visible', true, [1]);
         })
         .then(function() {
@@ -1391,6 +1397,7 @@ describe('bar visibility toggling:', function() {
             spyOn(gd._fullData[0]._module, 'crossTraceCalc').and.callThrough();
 
             _assert('base', [0.5, 3.5], [0, 5.263], 0);
+            expect(gd._fullLayout.legend.traceorder).toBe('reversed');
             return Plotly.restyle(gd, 'visible', false, [1]);
         })
         .then(function() {
@@ -1399,6 +1406,11 @@ describe('bar visibility toggling:', function() {
         })
         .then(function() {
             _assert('both invisible', [0.5, 3.5], [0, 2.105], 0);
+            return Plotly.restyle(gd, 'visible', 'legendonly');
+        })
+        .then(function() {
+            _assert('both legendonly', [0.5, 3.5], [0, 2.105], 0);
+            expect(gd._fullLayout.legend.traceorder).toBe('reversed');
             return Plotly.restyle(gd, 'visible', true, [1]);
         })
         .then(function() {