Method _getRuler

src/controllers/controller.bar.js:532–557

* @private

()

	 * @private
	 */
  _getRuler() {
    const opts = this.options;
    const meta = this._cachedMeta;
    const iScale = meta.iScale;
    const pixels = [];
    let i, ilen;

    for (i = 0, ilen = meta.data.length; i < ilen; ++i) {
      pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));
    }

    const barThickness = opts.barThickness;
    const min = barThickness || computeMinSampleSize(meta);

    return {
      min,
      pixels,
      start: iScale._startPixel,
      end: iScale._endPixel,
      stackCount: this._getStackCount(),
      scale: iScale,
      grouped: opts.grouped,
      // bar thickness ratio used for non-grouped bars
      ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage
    };
  }

  /**
	 * Note: pixel values are not clamped to the scale area.