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怎样写一个通用的JavaScript效果库!(2/2)

2008-02-10 23:42 555 查看
来源:/article/4907783.html

在上个随笔中贴出了效果库的整体框架,和一个简单的opacity插件. 今天这个随笔主要是扩展其他常用
效果插件,毕竟框架只能是个空壳,内容还是要自己充实。
如果看过了我上篇的实现细节,这里就不多说废话了,来段代码先:




/**//****************************************************/




// 移动, 这里是move to 就是移动到 x,y 当然,大家也可以再扩展一个move by 移动x个象素




Effect.Init.move=function(effect)

{ //初始化




if (effect.options.x!==undefined || effect.options.y!==undefined)

{


var pos=Position.cumulativeOffset(effect.element);


effect.setting.left =pos[0];


effect.setting.top =pos[1];


effect.setting.position =effect.element.style.position;


effect.element.style.position ="absolute"


effect.options.x=(effect.options.x===undefined)?effect.setting.left:effect.options.x;


effect.options.y=(effect.options.y===undefined)?effect.setting.top :effect.options.y;


}


}






Effect.Fn.move=function(effect,pos)

{ //效果


if (effect.options.x===undefined && effect.options.y===undefined) return


effect.element.style.left=effect.setting.left + (effect.options.x-effect.setting.left) * pos +"px";


effect.element.style.top =effect.setting.top + (effect.options.y-effect.setting.top ) * pos +"px";


}




/**//****************************************************/












/**//****************************************************/


// zoom by Go_Rush(阿舜) from http://ashun.cnblogs.com/



Effect.Init.zoom=function(effect)

{


effect.setting.zoom =effect.element.style.zoom || 1;


// firefox 不支持 css的 zoom 用 改变 width,height的方式代替




if (effect.options.zoom!==undefined && navigator.userAgent.toLowerCase().indexOf('firefox') != -1)

{


effect.options.w=effect.element.offsetWidth * effect.options.zoom;


effect.options.h=effect.element.offsetHeight * effect.options.zoom;


}


}




Effect.Fn.zoom=function(effect,pos)

{


if (effect.options.zoom===undefined) return;


effect.element.style.zoom=effect.setting.zoom+(effect.options.zoom-effect.setting.zoom)*pos


}






/**//****************************************************/








/**//****************************************************/


// size 同上,是 size to, 改变到指定大小 by Go_Rush(阿舜) from http://ashun.cnblogs.com/



Effect.Init.size=function(effect)

{




if (effect.options.w!==undefined || effect.options.h!==undefined)

{


effect.setting.overflow =effect.element.style.overflow || 'visible';


effect.setting.width =effect.element.offsetWidth;


effect.setting.height =effect.element.offsetHeight;


effect.element.style.overflow ="hidden"


effect.options.w=(effect.options.w===undefined)?effect.setting.width :effect.options.w;


effect.options.h=(effect.options.h===undefined)?effect.setting.height:effect.options.h;


}


}






Effect.Fn.size=function(effect,pos)

{


if (effect.options.w===undefined && effect.options.h===undefined) return;


effect.element.style.width =effect.setting.width + (effect.options.w-effect.setting.width ) * pos +"px";


effect.element.style.height=effect.setting.height+ (effect.options.h-effect.setting.height) * pos +"px";


}




/**//****************************************************/








/**//****************************************************/


// 背景色 by Go_Rush(阿舜) from http://ashun.cnblogs.com/



Effect.Init.bgcolor=function(effect)

{




if (effect.options.bgcolor!==undefined && /^/#?[a-f0-9]

{6}$/i.test(effect.options.bgcolor))

{


var color =effect.element.style.backgroundColor || "#ffffff";


//FireFox 下,即使css样式设置背景为 #ffffff格式,但程序取到的是 rgb(255,255,255)格式, 这里把他转化为 #ffffff格式




if (/rgb/i.test(color))

{ // "rgb(255, 0, 255)"


//var arr=color.replace(/[rgb/(/s/)]/gi,"").split(",")


var arr=eval(color.replace("rgb","new Array"))


color="#"+Number(arr[0]).toColorPart()+Number(arr[1]).toColorPart()+Number(arr[2]).toColorPart()


}


effect.setting.bgcolor=color


}


}




Effect.Fn.bgcolor=function(effect,pos)

{


if (effect.options.bgcolor===undefined) return;


var c1=effect.setting.bgcolor,c2=effect.options.bgcolor


var arr1=[parseInt(c1.slice(1,3),16),parseInt(c1.slice(3,5),16),parseInt(c1.slice(5),16)]


var arr2=[parseInt(c2.slice(1,3),16),parseInt(c2.slice(3,5),16),parseInt(c2.slice(5),16)]


var r=Math.round(arr1[0]+(arr2[0]-arr1[0])*pos)


var g=Math.round(arr1[1]+(arr2[1]-arr1[1])*pos)


var b=Math.round(arr1[2]+(arr2[2]-arr1[2])*pos)


effect.element.style.backgroundColor="#"+r.toColorPart()+g.toColorPart()+b.toColorPart()


}




/**//****************************************************/








/**//****************************************************/


// 透明度,这个上个贴过了 by Go_Rush(阿舜) from http://ashun.cnblogs.com/



Effect.Init.opacity=function(effect)

{


if (effect.options.opacity===undefined) return;


effect.setting.opacity=Opacity(effect.element);


}






Effect.Fn.opacity=function(effect,pos)

{


if (effect.options.opacity===undefined) return;


Opacity(effect.element,effect.setting.opacity+(effect.options.opacity-effect.setting.opacity)*pos);


}




/**//****************************************************/



这里 effect.setting 是非常有用而且非常重要的冬冬,所有的通过options传进来自定义函数都可以
通过effect.setting来获取element最初的设置。 在很多场合,我们需要在 options 中传一个 onComplete
函数进来, 用来在效果执行完毕后,打扫战场,恢复一些设置。
这些效果是可以重叠的,大家可以看看下面我写的例子。

写了十来个例子,应该很详细了。

完整的,可调试代码和例子如下:





全部代码附范例


<script language="javascript">




/**//*


这个函数的代码来自 Prototype.js http://prototype.conio.net/

如果页面引用了prototype.js ,则可以删除下面这个函数,


当然,即使不删除也没关系,因为作了简单的兼容性判断


*/




(function()

{




if (!("Prototype" in window))

{




Prototype=

{emptyFunction:function()

{}};




Class =

{




create: function()

{return function()

{this.initialize.apply(this, arguments)}}


};




$ = function(element)

{


return typeof(element)=="string"?document.getElementById(element):element


};




$A= function(arrLike)

{


for(var i=0,ret=[];i<arrLike.length;i++) ret[i]=arrLike[i];


return ret


};






Number.prototype.toColorPart =function()

{return String("00"+this.toString(16)).slice(-2)};




Function.prototype.bind = function()

{


var __method = this, args = $A(arguments), object = args.shift();




return function()

{return __method.apply(object, args.concat($A(arguments)))}


}






Position=

{




cumulativeOffset: function(element)

{


var valueT = 0, valueL = 0;




do

{


valueT += element.offsetTop || 0;


valueL += element.offsetLeft || 0;


element = element.offsetParent;


} while (element);


return [valueL, valueT];


}


}


}


})()






/**//*


1.读取/设置 透明度,


2.如果只传了一个参数element,则返回 element的透明度 (0<value<1)


3.如果传了两个参数 element和value 则把element的透明度设置为value value范围 0-1




*/




function Opacity(element,value)

{


//by Go_Rush(阿舜) from http://ashun.cnblogs.com/

var ret;




if (value===undefined)

{ //读取


if (!/msie/i.test(navigator.userAgent))


if (ret=element.style.opacity) return parseFloat(ret);




try

{return element.filters.item('alpha').opacity/100}catch(x)

{return 1.0}




}else

{ //设置


value=Math.min(Math.max(value,0.00001),0.999999) //这句修复一些非ie浏览器opacity不能设置为1的bug


if (/msie/i.test(navigator.userAgent)) return element.style.filter="alpha(opacity="+value*100+")"


return element.style.opacity=value


}


}






Effect =Class.create();


Effect.Fn =new Object();


Effect.Init =new Object();






Effect.prototype=

{


//by Go_Rush(阿舜) from http://ashun.cnblogs.com/





initialize: function(element,options)

{


this.element = $(element);




this.options = options ||

{};


this.duration = (this.options.duration || 2) * 1000; //效果执行时间


this.fps = this.options.fps || 50; //频率


this.steps = Math.floor(this.duration/this.fps); //当前步长,注: 这个变量是递减的,当它0的时候意味着整个效果结束


this.maxSteps = this.steps; //整个效果的步长


this.setting = new Object();


this.timer = null;






if (this.options.delay)

{ // 延时处理


var _this=this;




setTimeout(function()

{


_this.setup(_this);


(_this.options.onStart || Prototype.emptyFunction)(_this);


_this.run();


}, _this.options.delay*1000);




}else

{


this.setup(this);


(this.options.onStart || Prototype.emptyFunction)(this);


this.run();


}


},




run: function()

{


if (this.isFinished()) return (this.options.onComplete || Prototype.emptyFunction)(this);


if (this.timer) clearTimeout(this.timer);


this.duration -= this.fps;


this.steps--;


var pos=1-this.steps/this.maxSteps ; //总进度的百分比


this.loop(this,pos);


(this.options.onUpdate || Prototype.emptyFunction)(this,pos);


this.timer = setTimeout(this.run.bind(this), this.fps);


},




isFinished: function()

{


return this.steps <= 0;


},




setup:function(effect)

{ //初始化设置所有效果单元




for(var key in Effect.Init)

{


if (typeof(Effect.Init[key])!="function") continue;




try

{Effect.Init[key](this)}catch(x)

{}


}


},




loop:function(effect,pos)

{ //执行所有效果单元




for(var key in Effect.Fn)

{


if (typeof(Effect.Fn[key])!="function") continue;




try

{Effect.Fn[key](effect,pos)}catch(x)

{}


}


}


}






/**//****************************************************/




// 移动, 这里是move to 就是移动到 x,y 当然,大家也可以再扩展一个move by 移动x个象素




Effect.Init.move=function(effect)

{ //初始化




if (effect.options.x!==undefined || effect.options.y!==undefined)

{


var pos=Position.cumulativeOffset(effect.element);


effect.setting.left =pos[0];


effect.setting.top =pos[1];


effect.setting.position =effect.element.style.position;


effect.element.style.position ="absolute"


effect.options.x=(effect.options.x===undefined)?effect.setting.left:effect.options.x;


effect.options.y=(effect.options.y===undefined)?effect.setting.top :effect.options.y;


}


}






Effect.Fn.move=function(effect,pos)

{ //效果


if (effect.options.x===undefined && effect.options.y===undefined) return


effect.element.style.top =effect.setting.top + (effect.options.y-effect.setting.top ) * pos +"px";


effect.element.style.left=effect.setting.left + (effect.options.x-effect.setting.left) * pos +"px";




}




/**//****************************************************/












/**//****************************************************/


// zoom




Effect.Init.zoom=function(effect)

{


effect.setting.zoom =effect.element.style.zoom || 1;


// firefox 不支持 css的 zoom 用 改变 width,height的方式代替




if (effect.options.zoom!==undefined && navigator.userAgent.toLowerCase().indexOf('firefox') != -1)

{


effect.options.w=effect.element.offsetWidth * effect.options.zoom;


effect.options.h=effect.element.offsetHeight * effect.options.zoom;


}


}




Effect.Fn.zoom=function(effect,pos)

{


if (effect.options.zoom===undefined) return;


effect.element.style.zoom=effect.setting.zoom+(effect.options.zoom-effect.setting.zoom)*pos


}






/**//****************************************************/








/**//****************************************************/


// size 同上,是 size to, 改变到指定大小




Effect.Init.size=function(effect)

{




if (effect.options.w!==undefined || effect.options.h!==undefined)

{


effect.setting.overflow =effect.element.style.overflow || 'visible';


effect.setting.width =effect.element.offsetWidth;


effect.setting.height =effect.element.offsetHeight;


effect.element.style.overflow ="hidden"


effect.options.w=(effect.options.w===undefined)?effect.setting.width :effect.options.w;


effect.options.h=(effect.options.h===undefined)?effect.setting.height:effect.options.h;


}


}






Effect.Fn.size=function(effect,pos)

{


if (effect.options.w===undefined && effect.options.h===undefined) return;


effect.element.style.width =effect.setting.width + (effect.options.w-effect.setting.width ) * pos +"px";


effect.element.style.height=effect.setting.height+ (effect.options.h-effect.setting.height) * pos +"px";


}




/**//****************************************************/








/**//****************************************************/


// 背景色




Effect.Init.bgcolor=function(effect)

{




if (effect.options.bgcolor!==undefined && /^/#?[a-f0-9]

{6}$/i.test(effect.options.bgcolor))

{


var color =effect.element.style.backgroundColor || "#ffffff";


//FireFox 下,即使css样式设置背景为 #ffffff格式,但程序取到的是 rgb(255,255,255)格式, 这里把他转化为 #ffffff格式




if (/rgb/i.test(color))

{ // "rgb(255, 0, 255)"


//var arr=color.replace(/[rgb/(/s/)]/gi,"").split(",")


var arr=eval(color.replace("rgb","new Array"))


color="#"+Number(arr[0]).toColorPart()+Number(arr[1]).toColorPart()+Number(arr[2]).toColorPart()


}


effect.setting.bgcolor=color


}


}




Effect.Fn.bgcolor=function(effect,pos)

{


if (effect.options.bgcolor===undefined) return;


var c1=effect.setting.bgcolor,c2=effect.options.bgcolor


var arr1=[parseInt(c1.slice(1,3),16),parseInt(c1.slice(3,5),16),parseInt(c1.slice(5),16)]


var arr2=[parseInt(c2.slice(1,3),16),parseInt(c2.slice(3,5),16),parseInt(c2.slice(5),16)]


var r=Math.round(arr1[0]+(arr2[0]-arr1[0])*pos)


var g=Math.round(arr1[1]+(arr2[1]-arr1[1])*pos)


var b=Math.round(arr1[2]+(arr2[2]-arr1[2])*pos)


effect.element.style.backgroundColor="#"+r.toColorPart()+g.toColorPart()+b.toColorPart()


}




/**//****************************************************/








/**//****************************************************/


// 透明度,这个上个贴过了




Effect.Init.opacity=function(effect)

{


if (effect.options.opacity===undefined) return;


effect.setting.opacity=Opacity(effect.element);


}






Effect.Fn.opacity=function(effect,pos)

{


if (effect.options.opacity===undefined) return;


Opacity(effect.element,effect.setting.opacity+(effect.options.opacity-effect.setting.opacity)*pos);


}




/**//****************************************************/










function foo1()

{




new Effect("div1",

{bgcolor:"#3a3e3f"})


}






function foo2()

{




new Effect("div1",

{w:150,h:100})


}








function foo3()

{




new Effect("div1",

{x:100,y:100})


}








function foo4()

{




new Effect("div1",

{opacity:0.2})


}






function foo5()

{




new Effect("div1",

{zoom:2})


}






function foo6()

{




new Effect("div1",

{w:222,h:111,onComplete:function()

{




new Effect("div1",

{x:100,y:300,onComplete:function()

{




new Effect("div1",

{opacity:0.7,onComplete:function()

{




new Effect("div1",

{zoom:2,onComplete:function()

{




new Effect("div1",

{bgcolor:"#111111",onComplete:function()

{


alert("all done")


}})


}})


}})


}})


}})


}








function fix1()

{




new Effect("div1",

{zoom:4,opacity:0,x:0,y:0,onComplete:function(eff)

{


eff.element.style.display="none"


}})


}










function fix2()

{




new Effect("div1",

{y:80,h:22})


}








function fix3()

{ //注意这种复合




new Effect("div1",

{h:22,onComplete:function(eff)

{




new Effect("div1",

{w:0})


}})




new Effect("div1",

{opacity:0,duration:4})




}






function fix4()

{




new Effect("div1",

{opacity:0,zoom:0})


}








function fix5()

{




new Effect("div1",

{bgcolor:"#000000",onComplete:function()

{




new Effect("div1",

{bgcolor:"#ffffff"})


}})


}




var i=0;




function fix6()

{


if (++i>5) return false;




new Effect("div1",

{x:280,delay:0.5,duration:0.1,onComplete:function()

{




new Effect("div1",

{x:320,duration:0.1,onComplete:function()

{




new Effect("div1",

{x:280,duration:0.1,onComplete:function()

{




new Effect("div1",

{x:320,duration:0.1,onComplete:function()

{




new Effect("div1",

{x:280,duration:0.1,onComplete:function()

{




new Effect("div1",

{x:300,duration:0.1,onComplete:function()

{


fix6()


}})


}})


}})


}})


}})


}})


}






</script>


<fieldset>


<legend>单一效果</legend>


<button onclick="javascript:foo1()">颜 色 foo1</button> 


<button onclick="javascript:foo2()">大 小 foo2</button> 


<button onclick="javascript:foo3()">位 置 foo3</button> 


<button onclick="javascript:foo4()">透 明 度 foo4</button> 


<button onclick="javascript:foo5()">Zoom foo5</button> 


<button onclick="javascript:foo6()">所有 foo6</button> 


<br />


</fieldset>


<br />


<fieldset>


<legend>复合效果</legend>


<button onclick="javascript:fix1()"> 淡出fix1</button> 


<button onclick="javascript:fix2()"> 折起fix2</button> 


<button onclick="javascript:fix3()"> 慢慢变小消失 fix3</button> 


<button onclick="javascript:fix4()"> 慢慢变小消失2 fix4</button> 


<button onclick="javascript:fix5()"> 变色 fix5</button> 


<button onclick="javascript:fix6()"> 震动5次 fix6</button> 


<br />


</fieldset>




<br />


<br />


<button onclick="javascript:location.reload()"> 每次效果后按这里恢复</button> 


<br/>


<br/>


注意 FireFox 不支持 Zoom




<div id="div1" style="border:1px solid red;width:300px;height:150px;overflow:hidden;position:absolute;left:300px;top:200px;z-index:2;background-color:#ffffff">


<a href="http://ashun.cnblogs.com/">Go_Rush(阿舜)</a>


<img src="http://www.google.com/intl/zh-CN_ALL/images/logo.gif"><br />


</div>
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