limit minDiff maximum to 1 for category axes

Author: archmoj

src/lib/search.js

@@ -62,9 +62,7 @@ exports.sorterDes = function(a, b) { return b - a; };
  * just be off by a rounding error
  * return the distinct values and the minimum difference between any two
  */
-exports.distinctVals = function(valsIn, opts) {
-    var unitMinDiff = (opts || {}).unitMinDiff;
-
+exports.distinctVals = function(valsIn) {
     var vals = valsIn.slice();  // otherwise we sort the original array...
     vals.sort(exports.sorterAsc); // undefined listed in the end - also works on IE11
 
@@ -73,9 +71,7 @@ exports.distinctVals = function(valsIn, opts) {
         if(vals[last] !== BADNUM) break;
     }
 
-    var minDiff = 1;
-    if(!unitMinDiff) minDiff = (vals[last] - vals[0]) || 1;
-
+    var minDiff = (vals[last] - vals[0]) || 1;
     var errDiff = minDiff / (last || 1) / 10000;
     var newVals = [];
     var preV;

src/traces/bar/cross_trace_calc.js

@@ -172,7 +172,7 @@ function setGroupPositionsInOverlayMode(pa, sa, calcTraces, opts) {
         var calcTrace = calcTraces[i];
 
         var sieve = new Sieve([calcTrace], {
-            unitMinDiff: opts.xCat || opts.yCat,
+            posAxis: pa,
             sepNegVal: false,
             overlapNoMerge: !opts.norm
         });
@@ -196,6 +196,7 @@ function setGroupPositionsInOverlayMode(pa, sa, calcTraces, opts) {
 
 function setGroupPositionsInGroupMode(gd, pa, sa, calcTraces, opts) {
     var sieve = new Sieve(calcTraces, {
+        posAxis: pa,
         sepNegVal: false,
         overlapNoMerge: !opts.norm
     });
@@ -205,7 +206,7 @@ function setGroupPositionsInGroupMode(gd, pa, sa, calcTraces, opts) {
 
     // relative-stack bars within the same trace that would otherwise
     // be hidden
-    unhideBarsWithinTrace(sieve);
+    unhideBarsWithinTrace(sieve, pa);
 
     // set bar bases and sizes, and update size axis
     if(opts.norm) {
@@ -218,6 +219,7 @@ function setGroupPositionsInGroupMode(gd, pa, sa, calcTraces, opts) {
 
 function setGroupPositionsInStackOrRelativeMode(gd, pa, sa, calcTraces, opts) {
     var sieve = new Sieve(calcTraces, {
+        posAxis: pa,
         sepNegVal: opts.mode === 'relative',
         overlapNoMerge: !(opts.norm || opts.mode === 'stack' || opts.mode === 'relative')
     });
@@ -610,7 +612,7 @@ function sieveBars(sieve) {
     }
 }
 
-function unhideBarsWithinTrace(sieve) {
+function unhideBarsWithinTrace(sieve, pa) {
     var calcTraces = sieve.traces;
 
     for(var i = 0; i < calcTraces.length; i++) {
@@ -619,6 +621,7 @@ function unhideBarsWithinTrace(sieve) {
 
         if(fullTrace.base === undefined) {
             var inTraceSieve = new Sieve([calcTrace], {
+                posAxis: pa,
                 sepNegVal: true,
                 overlapNoMerge: true
             });

src/traces/bar/sieve.js

@@ -40,14 +40,17 @@ function Sieve(traces, opts) {
     }
     this.positions = positions;
 
-    var dv = distinctVals(positions, {
-        unitMinDiff: opts.unitMinDiff
-    });
+    var dv = distinctVals(positions);
 
     this.distinctPositions = dv.vals;
     if(dv.vals.length === 1 && width1 !== Infinity) this.minDiff = width1;
     else this.minDiff = Math.min(dv.minDiff, width1);
 
+    var type = (opts.posAxis || {}).type;
+    if(type === 'category' || type === 'multicategory') {
+        this.minDiff = Math.min(1, this.minDiff);
+    }
+
     this.binWidth = this.minDiff;
 
     this.bins = {};

src/traces/box/calc.js

@@ -40,7 +40,7 @@ module.exports = function calc(gd, trace) {
     var allPosArrays = getPosArrays(trace, posLetter, posAxis, fullLayout[numKey]);
     var posArray = allPosArrays[0];
     var origPos = allPosArrays[1];
-    var dv = Lib.distinctVals(posArray);
+    var dv = Lib.distinctVals(posArray, posAxis);
     var posDistinct = dv.vals;
     var dPos = dv.minDiff / 2;
 

src/traces/box/cross_trace_calc.js

@@ -60,9 +60,10 @@ function setPositionOffset(traceType, gd, boxList, posAxis) {
     if(!pointList.length) return;
 
     // box plots - update dPos based on multiple traces
-    var boxdv = Lib.distinctVals(pointList, {
-        unitMinDiff: posAxis.type === 'category' || posAxis.type === 'multicategory'
-    });
+    var boxdv = Lib.distinctVals(pointList);
+    if(posAxis.type === 'category' || posAxis.type === 'multicategory') {
+        boxdv.minDiff = Math.min(1, boxdv.minDiff);
+    }
 
     var dPos0 = boxdv.minDiff / 2;