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

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/* global window: false */
'use strict';

module.exports = function(Chart) {

	var helpers = Chart.helpers;

	Chart.defaults.global.animation = {
		duration: 1000,
		easing: 'easeOutQuart',
		onProgress: helpers.noop,
		onComplete: helpers.noop
	};

	Chart.Animation = Chart.Element.extend({
		chart: null, // the animation associated chart instance
		currentStep: 0, // the current animation step
		numSteps: 60, // default number of steps
		easing: '', // the easing to use for this animation
		render: null, // render function used by the animation service

		onAnimationProgress: null, // user specified callback to fire on each step of the animation
		onAnimationComplete: null, // user specified callback to fire when the animation finishes
	});

	Chart.animationService = {
		frameDuration: 17,
		animations: [],
		dropFrames: 0,
		request: null,

		/**
		 * @param {Chart} chart - The chart to animate.
		 * @param {Chart.Animation} animation - The animation that we will animate.
		 * @param {Number} duration - The animation duration in ms.
		 * @param {Boolean} lazy - if true, the chart is not marked as animating to enable more responsive interactions
		 */
		addAnimation: function(chart, animation, duration, lazy) {
			var animations = this.animations;
			var i, ilen;

			animation.chart = chart;

			if (!lazy) {
				chart.animating = true;
			}

			for (i=0, ilen=animations.length; i < ilen; ++i) {
				if (animations[i].chart === chart) {
					animations[i] = animation;
					return;
				}
			}

			animations.push(animation);

			// If there are no animations queued, manually kickstart a digest, for lack of a better word
			if (animations.length === 1) {
				this.requestAnimationFrame();
			}