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+<!DOCTYPE html><html><head><title>Sencha Documentation Project</title><link rel="stylesheet" href="../reset.css" type="text/css"><link rel="stylesheet" href="../prettify.css" type="text/css"><link rel="stylesheet" href="../prettify_sa.css" type="text/css"><script type="text/javascript" src="../prettify.js"></script></head><body onload="prettyPrint()"><pre class="prettyprint"><pre><span id='Ext-fx.Easing'>/**
+</span> * @class Ext.fx.Easing
+ *
+This class contains a series of function definitions used to modify values during an animation.
+They describe how the intermediate values used during a transition will be calculated. It allows for a transition to change
+speed over its duration. The following options are available:
+
+- linear The default easing type
+- backIn
+- backOut
+- bounceIn
+- bounceOut
+- ease
+- easeIn
+- easeOut
+- easeInOut
+- elasticIn
+- elasticOut
+- cubic-bezier(x1, y1, x2, y2)
+
+Note that cubic-bezier will create a custom easing curve following the CSS3 transition-timing-function specification `{@link http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag}`. The four values specify points P1 and P2 of the curve
+as (x1, y1, x2, y2). All values must be in the range [0, 1] or the definition is invalid.
+ * @markdown
+ * @singleton
+ */
+Ext.ns('Ext.fx');
+
+Ext.require('Ext.fx.CubicBezier', function() {
+ var math = Math,
+ pi = math.PI,
+ pow = math.pow,
+ sin = math.sin,
+ sqrt = math.sqrt,
+ abs = math.abs,
+ backInSeed = 1.70158;
+ Ext.fx.Easing = {
+ // ease: Ext.fx.CubicBezier.cubicBezier(0.25, 0.1, 0.25, 1),
+ // linear: Ext.fx.CubicBezier.cubicBezier(0, 0, 1, 1),
+ // 'ease-in': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 1, 1),
+ // 'ease-out': Ext.fx.CubicBezier.cubicBezier(0, 0.58, 1, 1),
+ // 'ease-in-out': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 0.58, 1),
+ // 'easeIn': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 1, 1),
+ // 'easeOut': Ext.fx.CubicBezier.cubicBezier(0, 0.58, 1, 1),
+ // 'easeInOut': Ext.fx.CubicBezier.cubicBezier(0.42, 0, 0.58, 1)
+ };
+
+ Ext.apply(Ext.fx.Easing, {
+ linear: function(n) {
+ return n;
+ },
+ ease: function(n) {
+ var q = 0.07813 - n / 2,
+ alpha = -0.25,
+ Q = sqrt(0.0066 + q * q),
+ x = Q - q,
+ X = pow(abs(x), 1/3) * (x < 0 ? -1 : 1),
+ y = -Q - q,
+ Y = pow(abs(y), 1/3) * (y < 0 ? -1 : 1),
+ t = X + Y + 0.25;
+ return pow(1 - t, 2) * 3 * t * 0.1 + (1 - t) * 3 * t * t + t * t * t;
+ },
+ easeIn: function (n) {
+ return pow(n, 1.7);
+ },
+ easeOut: function (n) {
+ return pow(n, 0.48);
+ },
+ easeInOut: function(n) {
+ var q = 0.48 - n / 1.04,
+ Q = sqrt(0.1734 + q * q),
+ x = Q - q,
+ X = pow(abs(x), 1/3) * (x < 0 ? -1 : 1),
+ y = -Q - q,
+ Y = pow(abs(y), 1/3) * (y < 0 ? -1 : 1),
+ t = X + Y + 0.5;
+ return (1 - t) * 3 * t * t + t * t * t;
+ },
+ backIn: function (n) {
+ return n * n * ((backInSeed + 1) * n - backInSeed);
+ },
+ backOut: function (n) {
+ n = n - 1;
+ return n * n * ((backInSeed + 1) * n + backInSeed) + 1;
+ },
+ elasticIn: function (n) {
+ if (n === 0 || n === 1) {
+ return n;
+ }
+ var p = 0.3,
+ s = p / 4;
+ return pow(2, -10 * n) * sin((n - s) * (2 * pi) / p) + 1;
+ },
+ elasticOut: function (n) {
+ return 1 - Ext.fx.Easing.elasticIn(1 - n);
+ },
+ bounceIn: function (n) {
+ return 1 - Ext.fx.Easing.bounceOut(1 - n);
+ },
+ bounceOut: function (n) {
+ var s = 7.5625,
+ p = 2.75,
+ l;
+ if (n < (1 / p)) {
+ l = s * n * n;
+ } else {
+ if (n < (2 / p)) {
+ n -= (1.5 / p);
+ l = s * n * n + 0.75;
+ } else {
+ if (n < (2.5 / p)) {
+ n -= (2.25 / p);
+ l = s * n * n + 0.9375;
+ } else {
+ n -= (2.625 / p);
+ l = s * n * n + 0.984375;
+ }
+ }
+ }
+ return l;
+ }
+ });
+ Ext.apply(Ext.fx.Easing, {
+ 'back-in': Ext.fx.Easing.backIn,
+ 'back-out': Ext.fx.Easing.backOut,
+ 'ease-in': Ext.fx.Easing.easeIn,
+ 'ease-out': Ext.fx.Easing.easeOut,
+ 'elastic-in': Ext.fx.Easing.elasticIn,
+ 'elastic-out': Ext.fx.Easing.elasticIn,
+ 'bounce-in': Ext.fx.Easing.bounceIn,
+ 'bounce-out': Ext.fx.Easing.bounceOut,
+ 'ease-in-out': Ext.fx.Easing.easeInOut
+ });
+});</pre></pre></body></html>
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