/src/com/greensock/easing/EaseLookup.as
https://bitbucket.org/HopeSky/mars_nd2d · ActionScript · 69 lines · 36 code · 7 blank · 26 comment · 3 complexity · 072476078d8386e8e6a7d412be2b5db2 MD5 · raw file
- package com.greensock.easing {
- /**
- * EaseLookup enables you to find the easing function associated with a particular name (String),
- * like "strongEaseOut" which can be useful when loading in XML data that comes in as Strings but
- * needs to be translated to native function references.
- *
- * <b>Copyright 2011, GreenSock. All rights reserved.</b> This work is subject to the terms in <a href="http://www.greensock.com/terms_of_use.html">http://www.greensock.com/terms_of_use.html</a> or for corporate Club GreenSock members, the software agreement that was issued with the corporate membership.
- *
- * @author Jack Doyle, jack@greensock.com
- */
- public class EaseLookup {
- /** @private **/
- private static var _lookup:Object;
-
- /**
- * Finds the easing function associated with a particular name (String), like "strongEaseOut". This can be useful when
- * loading in XML data that comes in as Strings but needs to be translated to native function references. You can pass in
- * the name with or without the period, and it is case insensitive, so any of the following will find the Strong.easeOut function: <br /><br /><code>
- * EaseLookup.find("Strong.easeOut") <br />
- * EaseLookup.find("strongEaseOut") <br />
- * EaseLookup.find("strongeaseout") <br /><br /></code>
- *
- * You can translate Strings directly when tweening, like this: <br /><code>
- * TweenLite.to(mc, 1, {x:100, ease:EaseLookup.find(myString)});<br /><br /></code>
- *
- * @param name The name of the easing function, with or without the period and case insensitive (i.e. "Strong.easeOut" or "strongEaseOut")
- * @return The easing function associated with the name
- */
- public static function find(name:String):Function {
- if (_lookup == null) {
- buildLookup();
- }
- return _lookup[name.toLowerCase()];
- }
-
- /** @private **/
- private static function buildLookup():void {
- _lookup = {};
-
- addInOut(Back, ["back"]);
- addInOut(Bounce, ["bounce"]);
- addInOut(Circ, ["circ", "circular"]);
- addInOut(Cubic, ["cubic"]);
- addInOut(Elastic, ["elastic"]);
- addInOut(Expo, ["expo", "exponential"]);
- addInOut(Linear, ["linear"]);
- addInOut(Quad, ["quad", "quadratic"]);
- addInOut(Quart, ["quart","quartic"]);
- addInOut(Quint, ["quint", "quintic", "strong"]);
- addInOut(Sine, ["sine"]);
-
- _lookup["linear.easenone"] = _lookup["lineareasenone"] = Linear.easeNone;
- }
-
- /** @private **/
- private static function addInOut(easeClass:Class, names:Array):void {
- var name:String;
- var i:int = names.length;
- while (i-- > 0) {
- name = names[i].toLowerCase();
- _lookup[name + ".easein"] = _lookup[name + "easein"] = easeClass.easeIn;
- _lookup[name + ".easeout"] = _lookup[name + "easeout"] = easeClass.easeOut;
- _lookup[name + ".easeinout"] = _lookup[name + "easeinout"] = easeClass.easeInOut;
- }
- }
-
-
- }
- }