add hovertext support

Author: archmoj

src/traces/volume/convert.js

@@ -54,7 +54,7 @@ proto.handlePick = function(selection) {
             this.data.value[selectIndex]
         ];
 
-        var text = this.data.text;
+        var text = this.data.hovertext || this.data.text;
         if(Array.isArray(text) && text[selectIndex] !== undefined) {
             selection.textLabel = text[selectIndex];
         } else if(text) {

test/jasmine/tests/volume_test.js

@@ -399,6 +399,27 @@ describe('Test volume', function() {
                     ].join('\n')
                 });
             })
+            .then(function() {
+                return Plotly.restyle(gd, 'hovertext', [
+                    fig.data[0].value.map(function(v) { return '!! ' + v + ' !!'; })
+                ]);
+            })
+            .then(delay(20))
+            .then(_hover4)
+            .then(function() {
+                assertHoverLabelContent({
+                    nums: [
+                        'x: 0.4',
+                        'y: 0.001',
+                        'z: −2',
+                        'value: −1.26',
+                        '!! -1.26 !!'
+                    ].join('\n')
+                });
+            })
+            .then(function() {
+                return Plotly.restyle(gd, 'hovertemplate', '%{value}<br>(%{x},%{y},%{z})<extra>!!</extra>');
+            })
             .catch(failTest)
             .then(done);
         });