JS Tween 颜色渐变- Javascript - 软晨网（RuanChen.com）

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Javascript 中的 JS Tween 颜色渐变

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-12 浏览: 45 ::

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漂亮的脚本日历,和大家分享 js 图片轮播(5张图片)

从我写的as tween改写的，基本功能跟as里面写的一样，只是没有扩展特定功能的接口（比如alpha2，move2，size2，color2等接口,这些在as tween里面都有实现）。有31中缓动算法，实现了颜色的自动转换（#f00 #ff0000 rgb(255,0,0)格式到颜色运算格式，最后返回#ff0000格式）、px单位的自动转换。
调用接口：
/**
* 对外接口
* Tween的示例
* @param startProps 开始属性，单个属性或者数组
* @param endProps 结束属性，单个属性或者数组
* @param timeSeconds 运动消耗时间，单位秒
* @param animType 动作类型，字符串型，内部自己转换算子
* @param delay 延迟时间，多长时间后开始运动，单位秒
*/
window.rtween = function(startProps, endProps, timeSeconds, animType, delay)
{
var tw = new Tween();
tw.start(startProps, endProps, timeSeconds, animType, delay);
return tw;
}
示例如下：
http://img.ruanchen.com/"htmlarea">点击运行可以看到效果:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="/upload/tech/20091012/20091012094416_b6f0479ae87d244975439c6124592772.js" type="text/javascript"></script>
<script src="/upload/tech/20091012/20091012094420_73278a4a86960eeb576a8fd4c9ec6997.js" type="text/javascript"></script>
</head>
<body>
<div> <input type="button" value="alpha2" onclick="alpha2()" /> <input type="button" value="color2" onclick="color2()" /> <input type="button" value="bgcolor2" onclick="bgcolor2()" /> <input type="button" value="width2" onclick="width2()" /> <input type="button" value="left2" onclick="left2()"/> <select size="1" id="tweentypeSelect" name="select"></select>
</div>
<div id='t' style='width:500px;height:500px;background-color:#00f;color:#ccc;position:absolute;'> function alpha2() { var t = rtween(1,0,1,type); t.run = function(ps) { $('#t').css('opacity',ps); } t.complete = function() { rtween(0,1,1,type).run = function(ps) { $('#t').css('opacity',ps); } } }
</div>
<script> // var t = rtween(0,0,0.1); var typeshtml = ''; // for(var i in t.animTypes) { typeshtml+='<option>'+i+'</option>'; } $('#tweentypeSelect').html(typeshtml); // var tag = $('#tweentypeSelect')[0]; var type = tag.options[tag.selectedIndex].text; $('#tweentypeSelect').change(function(){ type = tag.options[tag.selectedIndex].text; }); // function alpha2() { var t = rtween(1,0,1,type); t.run = function(ps) { $('#t').css('opacity',ps); } t.complete = function() { rtween(0,1,1,type).run = function(ps) { $('#t').css('opacity',ps); } } } function color2() { var t=rtween($('#t').css('color'),'#ff0000',1,type); t.run = function(ps) { $('#t').css('color',ps); } t.complete = function() { rtween($('#t').css('color'),'#ccc',1,type).run = function(ps) { $('#t').css('color',ps); } } } function bgcolor2() { var t=rtween($('#t').css('backgroundColor'),'#ff0000',1,type); t.run = function(ps) { $('#t').css('backgroundColor',ps); } t.complete = function() { rtween($('#t').css('backgroundColor'),'#0000ff',1,type).run = function(ps) { $('#t').css('backgroundColor',ps); } } } function width2() { var t = rtween($('#t').css('width'),'200px',1,type); t.run = function(ps) { $('#t').css('width',ps); } t.complete = function() { rtween($('#t').css('width'),'500px',1,type).run = function(ps) { $('#t').css('width',ps); } } } function left2() { var t = rtween($('#t').offset().left+'px','500px',1,type); t.run = function(ps) { $('#t').css('left',ps); } t.complete = function() { rtween($('#t').css('left'),'10px',1,type).run = function(ps) { $('#t').css('left',ps); } } }
</script>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

选择列表里面的缓动算法，点前面的按钮，就会以想对的缓动算法运动

源代码： /upload/tech/20091012/20091012094420_73278a4a86960eeb576a8fd4c9ec6997.js
核心代码:
function Tween()
{
this._frame=20;
//
this._animType = linear;
this._delay = 0;
//
this.run = function(){}
this.complete = function(){}
}
//
Tween.prototype.getValue = function(prop)
{
this._valueType = ”;
if(prop.constructor == Array) return prop;
//
if(typeof(prop) == 'string')
{
if(isColor(prop))
{
this._valueType = ‘color';
return c2a(prop);
}
if(prop.split('px').length>1)
{
this._valueType = ‘px';
return [prop.split('px')[0]];
}
}
return [prop];
}
Tween.prototype.setValue = function(prop)
{
if(this._valueType == ‘color')return a2c(prop);
if(this._valueType == ‘px')return prop[0]+'px';
return prop;
}
Tween.prototype.start = function(startProps, endProps, timeSeconds, animType, delay)
{
if(animType != undefined)this._animType = this.animTypes[animType];
if(delay != undefined)this._delay = delay;
//
this._timeSeconds = timeSeconds;
this._startTimer = new Date().getTime() + this._delay * 1000;
//
this._endProps = this.getValue(endProps);
this._startProps = this.getValue(startProps);
this._currentProps = [];
//
var $this = this;
clearInterval(this._runID);
this._runID = setInterval(
function(){$this._run();}
,this._frame);
}
Tween.prototype.stop = function(state)
{
for(var i in this._startProps)
{
if(Number(state)>0)
this._currentProps[i] = this._endProps[i];
else if(Number(state)<0)
this._currentProps[i] = this._startProps[i];
}
this.callListener();
this.complete();
//
clearInterval(this._runID);
}
Tween.prototype.callListener = function()
{
this.run(this.setValue(this._currentProps));
}
Tween.prototype._run = function()
{
if ( new Date().getTime()- this._startTimer< 0) return;
var isEnd = false;
//
for(var i in this._startProps)
{
this._currentProps[i] = this._animType( new Date().getTime()-this._startTimer,Number(this._startProps[i]),Number(this._endProps[i])-Number(this._startProps[i]),this._timeSeconds * 1000);
//
if(this._startTimer + (this._timeSeconds * 1000) <= new Date().getTime())
{
this._currentProps[i] = this._endProps[i];
isEnd = true;
}
}
//
if(isEnd)this.stop();
else this.callListener();
}

漂亮的脚本日历,和大家分享 js 图片轮播(5张图片)

Javascript 中的 JS Tween 颜色渐变

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