Move spike setup from axis to layout.

Fix 'across' for right-side axes.

Author: rpaskowitz

src/plots/cartesian/axis_defaults.js

@@ -75,12 +75,6 @@ module.exports = function handleAxisDefaults(containerIn, containerOut, coerce,
     coerce('range');
     containerOut.cleanRange();
 
-    coerce2('showspikes');
-    coerce2('spikecolor');
-    coerce2('spikethickness');
-    coerce2('spikedash');
-    coerce2('spikemode');
-
     handleTickValueDefaults(containerIn, containerOut, coerce, axType);
     handleTickLabelDefaults(containerIn, containerOut, coerce, axType, options);
     handleTickMarkDefaults(containerIn, containerOut, coerce, options);

src/plots/cartesian/graph_interact.js

@@ -878,7 +878,9 @@ function createSpikelines(hoverData, opts) {
         yMarker = c0.ya.spikemode.indexOf('marker') !== -1,
         xSpikeLine = c0.xa.spikemode.indexOf('toaxis') !== -1 || c0.xa.spikemode.indexOf('across') !== -1,
         ySpikeLine = c0.ya.spikemode.indexOf('toaxis') !== -1 || c0.ya.spikemode.indexOf('across') !== -1,
-        xEndSpike = c0.xa.spikemode.indexOf('across') !== -1 ? xBase + xLength : xPoint,
+        xEndSpike = c0.xa.spikemode.indexOf('across') !== -1 ?
+                (ySide === 'left' ? xBase + xLength : xBase - xLength) :
+                 xPoint,
         yEndSpike = c0.ya.spikemode.indexOf('across') !== -1 ? yBase - yLength : yPoint;
 
     // Remove old spikeline items

src/plots/cartesian/layout_defaults.js

@@ -173,6 +173,12 @@ module.exports = function supplyLayoutDefaults(layoutIn, layoutOut, fullData) {
 
         handleAxisDefaults(axLayoutIn, axLayoutOut, coerce, defaultOptions, layoutOut);
 
+        coerce('showspikes');
+        coerce('spikecolor');
+        coerce('spikethickness');
+        coerce('spikedash');
+        coerce('spikemode');
+
         var positioningOptions = {
             letter: axLetter,
             counterAxes: counterAxes[axLetter],