Code:
// Basic Element Animator (11-September-2009)
// 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 and an optional 'Bounce'.
// **** 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.
//
// **** Executing the Effect(Script)
//
// The effect is executed by an event call to function 'zxcBAnimator('width#',document.getElementById('tst'),10,800,5000,[10,800],'sin');'
// where:
// parameter 0 = the mode(see Note 2). (string)
// parameter 1 = the unique ID name or element object. (string or element object)
// parameter 2 = the start position of the effect. (digits, for opacity minimum 0, maximum 100)
// parameter 3 = the finish position of the effect. (digits, for opacity minimum 0, maximum 100)
// parameter 4 = (optional) 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 5 = (optional) to scale the effect time on a specified minimum/maximum. (array, see Note 5)
// field 0 the minimum. (digits)
// field 1 the maximum. (digits)
// parameter 6 = (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: The default units(excepting opacity) are 'px'.
// Note 2: Examples modes: 'left', 'top', 'width', 'height', 'opacity.
// For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
// Note 3: To 'toggle' the effect include '#' in parameter 0.
// The first call will set the toggle parameters.
// Subsequent calls with '#' in parameter 0 and the same start and finish parameters will 'toggle' the effect.
// Note 4: The function may be re-executed with a different set of parameters (start/finish time or period)
// whenever required, say from an onclick/mouseover/out event.
// The period parameter will be retained unless re-specified.
// Note 5: parameter 5 is of particular use when re-calling the effect
// in mid travel to retain an constant rate of progression.
// Note 6: parameters 2 and 3 must be different values to execute the script.
//
// **** Advanced Applications
//
// Calling function 'zxcBAnimator' returns the instance of the script,
// this may be assigned to a variable and used to access the current value of the effect or to control the effect.
// alternatively the script instance by elementobject[mode.replace(/\W/g,'')+'oop'];
// where mode is parameter 0 of the initial call.
// An array storing the current, start and finish values of the element effect may be accessed
// from the element [instance].data as fields 0, 1 and 2 respectively where [instance] is the instance of the script.
//
// Once initialised the effect may be updated by calling function
// [instance].update([100,200])
// where:
// parameter 0 = an array defining the start and finish values. (array)
// field[0] =the start position of the effect. (digits, for opacity minimum 0, maximum 100)
// field[0] = the finish position of the effect. (digits, for opacity minimum 0, maximum 100)
// parameter 1 = (optional) period of time between the start and finish of the effect in milliseconds. (digits or defaults to 2000 milliSeconds)
// parameter 2 = (optional) to scale the effect time on a specified minimum/maximum. (array, see Note 5)
// field 0 the minimum. (digits)
// field 1 the maximum. (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.
//
// *** Calling Functions on Completion of the Effect
//
// Functions may be called on completion of the effect by assigning the function
// to the animator intance property .Complete e.g. [instance].Complete=zxcBounce;
// where zxcBounce is the name of the function.
// The animator intance will be passed to the function as argument 0.
//
// **** General
//
// Function names are prefixed with 'zxc' to minimise conflicts with other JavaScripts.
// These characters may be changed to characters of choice using global find and replace.
//
// The Functional Code, about 2.55K with 'bounce' and 'opacity' or 1.97K without is best as an External JavaScript.
//
// Tested with IE7 and Mozilla FireFox on a PC.
//
// **** Functional Code - NO NEED to Change
function zxcBAnimator(mde,obj,srt,fin,ms,scale,curve){
if (typeof(obj)=='string'){ obj=document.getElementById(obj); }
if (!obj) return;
var oop=obj[mde.replace(/\W/g,'')+'oop'];
if (oop){
if (oop.srtfin[0]==srt&&oop.srtfin[1]==fin&&mde.match('#')) oop.update([oop.data[0],(oop.srtfin[0]==oop.data[2])?fin:srt],ms,scale,curve);
else oop.update([srt,fin],ms,scale,curve);
}
else oop=obj[mde.replace(/\W/g,'')+'oop']=new zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve);
return oop;
}
function zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve){
this.srtfin=[srt,fin];
this.to=null;
this.obj=obj;
this.mde=mde.replace(/\W/g,'');
this.update([srt,fin],ms,scale,curve);
}
zxcBAnimatorOOP.prototype.update=function(srtfin,ms,scale,curve){
clearTimeout(this.to);
this.time=ms||this.time||0;
this.data=[srtfin[0],srtfin[0],srtfin[1]];
this.mS=this.time*(!scale?1:Math.abs((srtfin[1]-srtfin[0])/(scale[1]-scale[0])));
this.ms=this.mS;
this.curve=(typeof(curve)=='string')?curve.charAt(0).toLowerCase():(this.curve)?this.curve:'x';
this.inc=Math.PI/(2*this.mS);
this.srttime=new Date().getTime();
this.cng();
}
zxcBAnimatorOOP.prototype.cng=function(){
this.ms=new Date().getTime()-this.srttime;
this.data[0]=(this.curve=='s')?Math.floor((this.data[2]-this.data[1])*Math.sin(this.inc*this.ms)+this.data[1]):(this.curve=='c')?(this.data[2])-Math.floor((this.data[2]-this.data[1])*Math.cos(this.inc*this.ms)):(this.data[2]-this.data[1])/this.mS*this.ms+this.data[1];
this.apply();
if (this.ms<this.mS) this.to=setTimeout(function(oop){return function(){oop.cng();}}(this),10);
else {
this.data[0]=this.data[2];
this.apply();
if (this.Complete) this.Complete(this);
}
}
zxcBAnimatorOOP.prototype.apply=function(){
if (isFinite(this.data[0])){
if (this.mde!='left'&&this.mde!='top'&&this.data[0]<0) 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.KhtmlOpacity=opc/100-.001;
}
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