Merge pull request #2925 from Joshuabaker2/master

Ability to manually set bar chart bar width

docs/04-Bar-Chart.md

@@ -99,6 +99,7 @@ type | String | "Category" | As defined in [Scales](#scales-category-scale).
 display | Boolean | true | If true, show the scale.
 id | String | "x-axis-0" | Id of the axis so that data can bind to it
 stacked | Boolean | false | If true, bars are stacked on the x-axis
+barThickness | Number | | Manually set width of each bar in pixels. If not set, the bars are sized automatically.
 categoryPercentage | Number | 0.8 | Percent (0-1) of the available width (the space between the gridlines for small datasets) for each data-point to use for the bars. [Read More](#bar-chart-barpercentage-vs-categorypercentage)
 barPercentage | Number | 0.9 | Percent (0-1) of the available width each bar should be within the category percentage. 1.0 will take the whole category width and put the bars right next to each other. [Read More](#bar-chart-barpercentage-vs-categorypercentage)
 gridLines | Object |  [See Scales](#scales) |
@@ -110,6 +111,7 @@ type | String | "linear" | As defined in [Scales](#scales-linear-scale).
 display | Boolean | true | If true, show the scale.
 id | String | "y-axis-0" | Id of the axis so that data can bind to it.
 stacked | Boolean | false | If true, bars are stacked on the y-axis
+barThickness | Number | | Manually set height of each bar in pixels. If not set, the bars are sized automatically.
 
 You can override these for your `Chart` instance by passing a second argument into the `Bar` method as an object with the keys you want to override.
 

src/controllers/controller.bar.js

@@ -162,6 +162,9 @@ module.exports = function(Chart) {
 
 		calculateBarWidth: function(index) {
 			var xScale = this.getScaleForId(this.getMeta().xAxisID);
+			if (xScale.options.barThickness) {
+				return xScale.options.barThickness;
+			}
 			var ruler = this.getRuler(index);
 			return xScale.options.stacked ? ruler.categoryWidth : ruler.barWidth;
 		},
@@ -504,6 +507,9 @@ module.exports = function(Chart) {
 		calculateBarHeight: function (index) {
 			var me = this;
 			var yScale = me.getScaleForId(me.getMeta().yAxisID);
+			if (yScale.options.barThickness) {
+				return yScale.options.barThickness;
+			}
 			var ruler = me.getRuler(index);
 			return yScale.options.stacked ? ruler.categoryHeight : ruler.barHeight;
 		},