ABPCMS.Web/lib/chart.js/src/core/core.ticks.js

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'use strict';

module.exports = function(Chart) {

	var helpers = Chart.helpers;

	/**
	 * Namespace to hold static tick generation functions
	 * @namespace Chart.Ticks
	 */
	Chart.Ticks = {
		/**
		 * Namespace to hold generators for different types of ticks
		 * @namespace Chart.Ticks.generators
		 */
		generators: {
			/**
			 * Interface for the options provided to the numeric tick generator
			 * @interface INumericTickGenerationOptions
			 */
			/**
			 * The maximum number of ticks to display
			 * @name INumericTickGenerationOptions#maxTicks
			 * @type Number
			 */
			/**
			 * The distance between each tick.
			 * @name INumericTickGenerationOptions#stepSize
			 * @type Number
			 * @optional
			 */
			/**
			 * Forced minimum for the ticks. If not specified, the minimum of the data range is used to calculate the tick minimum
			 * @name INumericTickGenerationOptions#min
			 * @type Number
			 * @optional
			 */
			/**
			 * The maximum value of the ticks. If not specified, the maximum of the data range is used to calculate the tick maximum
			 * @name INumericTickGenerationOptions#max
			 * @type Number
			 * @optional
			 */

			/**
			 * Generate a set of linear ticks
			 * @method Chart.Ticks.generators.linear
			 * @param generationOptions {INumericTickGenerationOptions} the options used to generate the ticks
			 * @param dataRange {IRange} the range of the data
			 * @returns {Array<Number>} array of tick values
			 */
			linear: function(generationOptions, dataRange) {
				var ticks = [];
				// To get a "nice" value for the tick spacing, we will use the appropriately named
				// "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
				// for details.

				var spacing;
				if (generationOptions.stepSize && generationOptions.stepSize > 0) {
					spacing = generationOptions.stepSize;