Method _calculateBarIndexPixels

src/controllers/controller.bar.js:636–666

* @private

(index, ruler)

	 * @private
	 */
  _calculateBarIndexPixels(index, ruler) {
    const scale = ruler.scale;
    const options = this.options;
    const skipNull = options.skipNull;
    const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);
    let center, size;
    const axisCount = this._getAxisCount();
    if (ruler.grouped) {
      const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;
      const range = options.barThickness === class="st">'flex'
        ? computeFlexCategoryTraits(index, ruler, options, stackCount * axisCount)
        : computeFitCategoryTraits(index, ruler, options, stackCount * axisCount);
      const axisID = this.chart.options.indexAxis === class="st">'x' ? this.getDataset().xAxisID : this.getDataset().yAxisID;
      const axisNumber = this._getAxis().indexOf(valueOrDefault(axisID, this.getFirstScaleIdForIndexAxis()));
      const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined) + axisNumber;
      center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);
      size = Math.min(maxBarThickness, range.chunk * range.ratio);
    } else {
      class="cm">// For non-grouped bar charts, exact pixel values are used
      center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);
      size = Math.min(maxBarThickness, ruler.min * ruler.ratio);
    }


    return {
      base: center - size / 2,
      head: center + size / 2,
      center,
      size
    };
  }

  draw() {
    const meta = this._cachedMeta;