Issue #285 bars >= 0 with 1 px height will now show up above the y = 0 line on discreteBar and multiBar

nv.d3.js

@@ -2249,7 +2249,14 @@ nv.models.discreteBar = function() {
       d3.transition(bars)
         //.delay(function(d,i) { return i * 1200 / data[0].values.length })
           .attr('transform', function(d,i) {
-              return 'translate(' + x(getX(d,i)) + ', ' + (getY(d,i) < 0 ? y(0) : y(getY(d,i))) + ')'
+            var left = x(getX(d,i)),
+                top = getY(d,i) < 0 ?
+                        y(0) :
+                        y(0) - y(getY(d,i)) < 1 ?
+                          y(0) - 1 : //make 1 px positive bars show up above y=0
+                          y(getY(d,i));
+
+              return 'translate(' + left + ', ' + top + ')'
           })
         .select('rect')
           .attr('height', function(d,i) {
@@ -5146,8 +5153,10 @@ nv.models.multiBar = function() {
               d3.transition(d3.select(this))
                 .attr('y', function(d,i) {
                   return getY(d,i) < 0 ?
-                    y(0) :
-                    y(getY(d,i))
+                          y(0) :
+                          y(0) - y(getY(d,i)) < 1 ?
+                            y(0) - 1 :
+                            y(getY(d,i))
                 })
                 .attr('height', function(d,i) {
                   return Math.max(Math.abs(y(getY(d,i)) - y(0)),1);

src/models/discreteBar.js

@@ -195,7 +195,14 @@ nv.models.discreteBar = function() {
       d3.transition(bars)
         //.delay(function(d,i) { return i * 1200 / data[0].values.length })
           .attr('transform', function(d,i) {
-              return 'translate(' + x(getX(d,i)) + ', ' + (getY(d,i) < 0 ? y(0) : y(getY(d,i))) + ')'
+            var left = x(getX(d,i)),
+                top = getY(d,i) < 0 ?
+                        y(0) :
+                        y(0) - y(getY(d,i)) < 1 ?
+                          y(0) - 1 : //make 1 px positive bars show up above y=0
+                          y(getY(d,i));
+
+              return 'translate(' + left + ', ' + top + ')'
           })
         .select('rect')
           .attr('height', function(d,i) {

src/models/multiBar.js

@@ -242,8 +242,10 @@ nv.models.multiBar = function() {
               d3.transition(d3.select(this))
                 .attr('y', function(d,i) {
                   return getY(d,i) < 0 ?
-                    y(0) :
-                    y(getY(d,i))
+                          y(0) :
+                          y(0) - y(getY(d,i)) < 1 ?
+                            y(0) - 1 :
+                            y(getY(d,i))
                 })
                 .attr('height', function(d,i) {
                   return Math.max(Math.abs(y(getY(d,i)) - y(0)),1);