软件开发培训班 >> 编程开发 >> JavaScript

Dom元素变换效果（工具函数）

　　本文标签：Dom,元素变换

<!Doctype html> 
<html> 
<head> 
<meta http-equiv="Content-type" content="text/html; charset=gb2312" /> 
<title>Tweens demo</title> 
<script type="text/javascript">//////////////* = Hongru.anim.js =*/////////// 
// @author: hongru.chen // 
// @date: 2010-10-17 // 
//////////////////////////////////////////// 
var Hongru = { 
get : function (id) {return document.getElementById(id)}, 
tween : { 
linear : function (f, t, d) { return t * d + f; }, 
ease : function (f, t, d) { return -t * .5 * (Math.cos(Math.PI * d) - 1) + f; } 
}, 
tweens: [], 
tweensCnt: 0, 
anim : function (obj, params) { 
var self = this, 
objList = [], 
objReturn = []; 
var animimg = function () { 
var i = -1, o; 
while( o = self.tweens[++i] ) { 
var cTime = (new Date()).getTime() - o.start; 
if (cTime < o.duration) { 
for (var k in o.val) { 
var m = o.val[k]; 
o.obj[k] = Math.ceil(o.ease(m.from, m.diff, cTime/o.duration)) + (o.cssMode ? px : 0); 
} 
} else { 
cTime = o.duration; 
for (var k in o.val) { 
var m = o.val[k]; 
o.obj[k] = Math.ceil(o.ease(m.from, m.diff, cTime/o.duration)) + (o.cssMode ? px : 0); 
} 
self.tweens.splice(i, 1); 
self.tweensCnt--; 
if (o.onFinish) o.onFinish (o.params); 
self.stop(); 
} 
if (!o.cssMode) o.obj.onTween(); 
} 
}; 
if (typeof obj == "string" || !obj.length) objList.push(obj); else objList = obj; 
for (var il = 0, l = objList.length; il < l; il++) { 
var obj = this.get(objList[il]) || objList[il]; 
var o = {}; 
o.val = {}; 
o.cssMode = true; 
o.o = obj; 
o.obj = obj.style; 
for (var k in params) { 
var p = params[k]; 
if (k === "cssMode") { 
if (p === false) { 
o.cssMode = false; 
o.obj = obj; 
} 
} else if (k === "onTween") { 
o.obj.onTween = p; 
} else if (k === "from") { 
for (var i in p) o.obj[i] = o.cssMode ? (Math.ceil(p[i]) + px) : p[i]; 
} else if (k === "to") { 
for (var i in p) { 
var from = o.cssMode ? (parseInt(o.obj[i]) || 0) : (o.obj[i] || 0); 
o.val[i] = { 
from: from, 
diff: p[i] - from 
}; 
} 
} else o[k] = params[k]; 
} 
if (!o.ease) o.ease = this.tween.ease; 
if (!o.cssMode && params[from]) o.obj.onTween(); 
o.duration = params.duration ? params.duration : 1000; 
o.start = (new Date()).getTime(); 
this.tweens.push(o); 
this.tweensCnt++; 
if (!this.running) this.running = window.setInterval(animimg, 10); 
objReturn.push(o); 
} 
return objReturn.length === 1 ? o : objReturn; 
}, 
stop : function () { 
if (!this.tweensCnt) { 
window.clearInterval(this.running); 
this.running = false; 
} 
}, 
kill : function (obj) { 
if (obj) { 
for (var i = 0; i < this.tweensCnt; i++) { 
if (this.tweens[i] === obj || this.tweens[i].o === obj || this.tweens[i].o === this.get(obj)) { 
this.tweensCnt--; 
this.tweens.splice(i, 1); 
this.stop(); 
} 
} 
} 
}, 
reset : function () { 
this.tweensCnt = 0; 
this.stop(); 
while( this.tweens.length ) { 
this.tweens.stop(); 
} 
} 
}</script> 
<style type="text/css"></style> 
</head> 
<body> 
<script type="text/javascript"></script> 
<div class="container" style="height:250px" _mce_style="height: 250px;"> 
<button onclick=tween1("test1")>Animate!</button><br> 
<div id="test1" style="border:4px solid #333;width:50px;height:50px;position:absolute" _mce_style="border: 4px solid #333; width: 50px; height: 50px; position: absolute;"></div> 
</div> 
</body> 
</html>

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