fresh start hover points with the winning point

Author: archmoj

src/components/fx/hover.js

@@ -658,6 +658,7 @@ function _hover(gd, evt, subplot, noHoverEvent) {
         hoverData[0].trace.type !== 'splom' // TODO: add support for splom
     ) {
         var winningPoint = hoverData[0];
+        hoverData = [winningPoint];
 
         var customXVal = customVal('x', winningPoint, fullLayout);
         var customYVal = customVal('y', winningPoint, fullLayout);
@@ -684,9 +685,9 @@ function _hover(gd, evt, subplot, noHoverEvent) {
             } else {
                 var oldId = seen[key] - 1;
                 var oldHd = finalPoints[oldId];
-                if(
-                    Math.abs(winningPoint.distance - newHd.distance) <
-                    Math.abs(winningPoint.distance - oldHd.distance)
+                if(oldId > 0 &&
+                    Math.abs(newHd.distance) <
+                    Math.abs(oldHd.distance)
                 ) {
                     // replace with closest
                     finalPoints[oldId] = newHd;

test/jasmine/tests/hover_label_test.js

@@ -5487,10 +5487,10 @@ describe('hovermode: (x|y)unified', function() {
             .then(function(gd) {
                 _hover(gd, {curveNumber: 0});
 
-                assertLabel({title: 'Apr 13, 2014, 15:21:11', items: [
+                assertLabel({title: 'Apr 13, 2014, 15:21:15', items: [
                     'Outdoor (wun... : (Apr 13, 2014, 15:26:12, 69.4)',
-                    '1st Floor (N... : (Apr 13, 2014, 15:21:15, 74.8)',
-                    '2nd Floor (R... : 73.625',
+                    '1st Floor (N... : 74.8',
+                    '2nd Floor (R... : (Apr 13, 2014, 15:21:11, 73.625)',
                     'Attic (Ardui... : (Apr 13, 2014, 15:26:34, 98.49)'
                 ]});
             })