axes.getDataConversions as a generalization of axes.getDataToCoordFunc

Author: alexcjohnson

src/plots/cartesian/axes.js

@@ -124,7 +124,7 @@ axes.cleanPosition = function(pos, gd, axRef) {
     return cleanPos(pos);
 };
 
-axes.getDataToCoordFunc = function(gd, trace, target, targetArray) {
+var getDataConversions = axes.getDataConversions = function(gd, trace, target, targetArray) {
     var ax;
 
     // If target points to an axis, use the type we already have for that
@@ -155,15 +155,23 @@ axes.getDataToCoordFunc = function(gd, trace, target, targetArray) {
 
     // if 'target' has corresponding axis
     // -> use setConvert method
-    if(ax) return ax.d2c;
+    if(ax) return {d2c: ax.d2c, c2d: ax.c2d};
 
     // special case for 'ids'
     // -> cast to String
-    if(d2cTarget === 'ids') return function(v) { return String(v); };
+    if(d2cTarget === 'ids') return {d2c: toString, c2d: toString};
 
     // otherwise (e.g. numeric-array of 'marker.color' or 'marker.size')
     // -> cast to Number
-    return function(v) { return +v; };
+
+    return {d2c: toNum, c2d: toNum};
+};
+
+function toNum(v) { return +v; }
+function toString(v) { return String(v); }
+
+axes.getDataToCoordFunc = function(gd, trace, target, targetArray) {
+    return getDataConversions(gd, trace, target, targetArray).d2c;
 };
 
 // empty out types for all axes containing these traces