/** * 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][0] * specification. 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. * * [0]: http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag * * @singleton */Ext.define('Ext.fx.Easing', function () { var math = Math, pi = math.PI, pow = math.pow, sin = math.sin, sqrt = math.sqrt, abs = math.abs, backInSeed = 1.70158; return { requires: [ 'Ext.fx.CubicBezier' ], singleton: true, linear: Ext.identityFn, ease: function(n) { var q = 0.07813 - n / 2, 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; } };},function (me) { // since we are a singleton, we are passed the instance (not the class) var Easing = me.self, proto = Easing.prototype; Easing.addMembers({ 'back-in': proto.backIn, 'back-out': proto.backOut, 'ease-in': proto.easeIn, 'ease-out': proto.easeOut, 'elastic-in': proto.elasticIn, 'elastic-out': proto.elasticOut, 'bounce-in': proto.bounceIn, 'bounce-out': proto.bounceOut, 'ease-in-out': proto.easeInOut });});