Function getLayoutOnAxis

_benchmarks/sample_echarts.js:35425–35454

* @return {Object} {width, offset, offsetCenter} If axis.type is not 'category', return undefined.

(opt)

    function getLayoutOnAxis(opt) {
      var params = [];
      var baseAxis = opt.axis;
      var axisKey = 'axis0';

      if (baseAxis.type !== 'category') {
        return;
      }

      var bandWidth = baseAxis.getBandWidth();

      for (var i = 0; i < opt.count || 0; i++) {
        params.push(defaults({
          bandWidth: bandWidth,
          axisKey: axisKey,
          stackId: STACK_PREFIX + i
        }, opt));
      }

      var widthAndOffsets = doCalBarWidthAndOffset(params);
      var result = [];

      for (var i = 0; i < opt.count; i++) {
        var item = widthAndOffsets[axisKey][STACK_PREFIX + i];
        item.offsetCenter = item.offset + item.width / 2;
        result.push(item);
      }

      return result;
    }
    function prepareLayoutBarSeries(seriesType, ecModel) {
      var seriesModels = [];
      ecModel.eachSeriesByType(seriesType, function (seriesModel) {