Fix bar width on subchart when brush - #497

c3.js

@@ -2885,8 +2885,9 @@
     };
     c3_chart_internal_fn.generateGetBarPoints = function (barIndices, isSub) {
         var $$ = this,
+            axis = isSub ? $$.subXAxis : $$.xAxis,
             barTargetsNum = barIndices.__max__ + 1,
-            barW = $$.getBarW($$.xAxis, barTargetsNum),
+            barW = $$.getBarW(axis, barTargetsNum),
             barX = $$.getShapeX(barW, barTargetsNum, barIndices, !!isSub),
             barY = $$.getShapeY(!!isSub),
             barOffset = $$.getShapeOffset($$.isBarType, barIndices, !!isSub),
@@ -3758,7 +3759,8 @@
         } else {
             // TODO: move this to c3_axis
             axis.tickOffset = function () {
-                var edgeX = $$.getEdgeX($$.data.targets), diff = $$.x(edgeX[1]) - $$.x(edgeX[0]),
+                var scale = this.scale(),
+                    edgeX = $$.getEdgeX($$.data.targets), diff = scale(edgeX[1]) - scale(edgeX[0]),
                     base = diff ? diff : (config.axis_rotated ? $$.height : $$.width);
                 return (base / $$.getMaxDataCount()) / 2;
             };

src/axis.js

@@ -48,7 +48,8 @@ c3_chart_internal_fn.getXAxis = function (scale, orient, tickFormat, tickValues)
     } else {
         // TODO: move this to c3_axis
         axis.tickOffset = function () {
-            var edgeX = $$.getEdgeX($$.data.targets), diff = $$.x(edgeX[1]) - $$.x(edgeX[0]),
+            var scale = this.scale(),
+                edgeX = $$.getEdgeX($$.data.targets), diff = scale(edgeX[1]) - scale(edgeX[0]),
                 base = diff ? diff : (config.axis_rotated ? $$.height : $$.width);
             return (base / $$.getMaxDataCount()) / 2;
         };

src/shape.bar.js

@@ -86,8 +86,9 @@ c3_chart_internal_fn.generateDrawBar = function (barIndices, isSub) {
 };
 c3_chart_internal_fn.generateGetBarPoints = function (barIndices, isSub) {
     var $$ = this,
+        axis = isSub ? $$.subXAxis : $$.xAxis,
         barTargetsNum = barIndices.__max__ + 1,
-        barW = $$.getBarW($$.xAxis, barTargetsNum),
+        barW = $$.getBarW(axis, barTargetsNum),
         barX = $$.getShapeX(barW, barTargetsNum, barIndices, !!isSub),
         barY = $$.getShapeY(!!isSub),
         barOffset = $$.getShapeOffset($$.isBarType, barIndices, !!isSub),