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View Full Version : Gradual Element Fader onclick opacity?



Al Fresco
04-01-2011, 02:39 AM
1) Script Title: Gradual Element Fader

2) Script URL (on DD):http://www.dynamicdrive.com/dynamicindex11/gradualfader.htm

3) Describe problem: Hi. I'm using Gradual Element Fader as thumbs (main pics displayed in fadeslideshow). Is it possible to have the selected thumb stay at full opacity 'onclick'. - until another thumb is selected? Many Thanks,
Al

vwphillips
04-01-2011, 11:24 AM
<!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" xml:lang="en" lang="en">

<head>
<title></title>
<style type="text/css">
/*<![CDATA[*/
#tst {
position:relative;left:100px;top:100px;width:400px;height:75px;border:solid red 1px;
}

#tst IMG{
position:relative;left:0px;top:0px;height:75px;
}
/*]]>*/
</style>

<script type="text/javascript">
// Animate (11-January-2010)
// by Vic Phillips http://www.vicsjavascripts.org.uk

// To progressively change the Left, Top, Width, Height or Opacity of an element over a specified period of time.
// With the ability to scale the effect time on specified minimum/maximum values
// and with three types of progression 'sin' and 'cos' and liner.

// **** Application Notes

// **** The HTML Code
//
// when moving an element the inline or class rule style position of the element should be assigned as
// 'position:relative;' or 'position:absolute;'
//
// The element would normally be assigned a unique ID name.
//

// **** Initialising the Script.
//
// The script is initialised by assigning an instance of the script to a variable.
// e.g A = new zxcAnimate('left','id1')
// where:
// A = a global variable (variable)
// parameter 0 = the mode(see Note 1). (string)
// parameter 1 = the unique ID name or element object. (string or element object)
// parameter 1 = the initial value. (digits, default = 0)

// **** Executing the Effect
//
// The effect is executed by an event call to function 'A.animate(10,800 ,5000,[10,800]);'
// where:
// A = the global referencing the script instance. (variable)
// parameter 0 = the start value. (digits, for opacity minimum 0, maximum 100)
// parameter 1 = the finish value. (digits, for opacity minimum 0, maximum 100)
// parameter 2 = period of time between the start and finish of the effect in milliseconds. (digits or defaults to previous or 0(on first call) milliSeconds)
// parameter 3 = (optional) to scale the effect time on a specified minimum/maximum. (array, see Note 3)
// field 0 the minimum value. (digits)
// field 1 the maximum value. (digits)
// parameter 3 = (optional) the type of progression, 'sin', 'cos' or 'liner'. (string, default = 'liner')
// 'sin' progression starts fast and ends slow.
// 'cos' progression starts slow and ends fast.
//
// Note 1: Examples modes: 'left', 'top', 'width', 'height', 'opacity.
// Note 2: The default units(excepting opacity) are 'px'.
// For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
// Note 3: The scale is of particular use when re-calling the effect
// in mid progression to retain an constant rate of progression.
// Note 4: The current effect value is recorded in A.data[0].
// Note 5: A function may be called on completion of the effect by assigning the function
// to the animator intance property .Complete.
// e.g. [instance].Complete=function(){ alert(this.data[0]); };
//



// **** Functional Code(1.52K) - NO NEED to Change

function zxcAnimate(mde,obj,srt){
this.to=null;
this.obj=typeof(obj)=='object'?obj:document.getElementById(obj);
this.mde=mde.replace(/\W/g,'');
this.data=[srt||0];
return this;
}

zxcAnimate.prototype={

animate:function(srt,fin,ms,scale,c){
clearTimeout(this.to);
this.time=ms||this.time||0;
this.neg=srt<0||fin<0;
this.data=[srt,srt,fin];
this.mS=this.time*(!scale?1:Math.abs((fin-srt)/(scale[1]-scale[0])));
this.c=typeof(c)=='string'?c.charAt(0).toLowerCase():this.c?this.c:'';
this.inc=Math.PI/(2*this.mS);
this.srttime=new Date().getTime();
this.cng();
},

cng:function(){
var oop=this,ms=new Date().getTime()-this.srttime;
this.data[0]=Math.floor(this.c=='s'?(this.data[2]-this.data[1])*Math.sin(this.inc*ms)+this.data[1]:this.c=='c'?this.data[2]-(this.data[2]-this.data[1])*Math.cos(this.inc*ms):(this.data[2]-this.data[1])/this.mS*ms+this.data[1]);
this.apply();
if (ms<this.mS) this.to=setTimeout(function(){oop.cng()},10);
else {
this.data[0]=this.data[2];
this.apply();
if (this.Complete) this.Complete(this);
}
},

apply:function(){
if (isFinite(this.data[0])){
if (this.data[0]<0&&!this.neg) this.data[0]=0;
if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
else zxcOpacity(this.obj,this.data[0]);
}
}

}

function zxcOpacity(obj,opc){
if (opc<0||opc>100) return;
obj.style.filter='alpha(opacity='+opc+')';
obj.style.opacity=obj.style.MozOpacity=obj.style.WebkitOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}


</script>


</head>

<body>
<div id="tst" >
<img src="http://www.vicsjavascripts.org.uk/StdImages/Egypt5.jpg" alt="Image" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Egypt6.jpg" alt="Image" />
<img src="http://www.vicsjavascripts.org.uk/StdImages/Egypt7.jpg" alt="Image" />
</div>

<script type="text/javascript">
/*<![CDATA[*/

function zxcFade(o){
var obj=document.getElementById(o.ID),imgs=obj.getElementsByTagName('IMG'),opac=o.Opacity,nu=typeof(opac)=='number'?opac:50,nu=o.HighLight,nu=typeof(nu)=='number'?n u:-1,z0=0,ms=o.FadeDuration;
this.imgs=[];
for (;z0<imgs.length;z0++){
this.imgs[z0]=new zxcAnimate('opacity',imgs[z0],z0!=nu?opac:100);
zxcOpacity(imgs[z0],z0!=nu?opac:100);
this.addevt(imgs[z0],'mouseup','HighLight',z0);
}
this.opac=opac;
this.lst=this.imgs[nu]?this.imgs[nu]:this.imgs[0];
this.ms=typeof(ms)=='number'?ms:500;
}

zxcFade.prototype={

HighLight:function(nu){
this.lst.animate(this.lst.data[0],this.opac,this.ms,[this.opac,100]);
this.lst=this.imgs[nu];
this.lst.animate(this.lst.data[0],100,this.ms,[this.opac,100]);
},

addevt:function(o,t,f,p){
var oop=this;
if (o.addEventListener) o.addEventListener(t,function(e){ return oop[f](p,e);}, false);
else if (o.attachEvent) o.attachEvent('on'+t,function(e){ return oop[f](p,e); });
}

}

new zxcFade({
ID:'tst',
FadeDuration:500,
Opacity:50,
HighLight:0
});
/*]]>*/
</script>
</body>

</html>