// VERSION: 1.3 LAST UPDATE: 26.05.2010

/*

 * THIS IS FREE SCRIPT BUT LEAVE THIS COMMENT IF

 * YOU WANT USE THIS CODE ON YOUR SITE

 * 

 * Made by Wilq32, wilq32@gmail.com, Wroclaw, Poland, 01.2009

 * http://wilq32.blogspot.com

 * 

 */

/*

Description:



This is an final product of a Wilq32.PhotoEffect Snippet. Actually you can

 use this simple and tiny script to get effect of rotated images directly 

 from client side (for ex. user generated content), and animate them using

 own functions. 





Notices:



Include script after including main jQuery. Whole plugin uses jQuery

namespace and should be compatible with older version (unchecked). 



Usage:



jQuery(imgElement).rotate(angleValue)

jQuery(imgElement).rotate(parameters)

jQuery(imgElement).rotateAnimation(parameters)

jQuery(imgElement).rotateAnimation(parameters)







Returns:



jQueryRotateElement - !!! NOTICE !!! function return rotateElement

instance to help connect events with actually created 'rotation' element.



Parameters:



    ({angle:angleValue,

	 [preservePosition:preservePositionBoolean],

     [animateAngle:animateAngleValue],

     [maxAngle:maxAngleValue],

     [minAngle:minAngleValue],

     [callback:callbackFunction],

	 [animatedGif:animatedGifBoolean],

     [bind:[{event: function},{event:function} ] })

jQuery(imgElement).rotateAnimation



Where:



- angleValue - clockwise rotation given in degrees,

- [preservePositionBoolean] (boolean) - optional parameter, preserves an image position instead of 

								 increasing size for bounding box

- [animateAngleValue] - optional parameter, animate rotating into this value,

- [maxAngleValue] - optional parameter, maximum angle possible for animation,

- [minAngleValue] - optional parameter, minimum angle possible for animation,

- [callbackFunction] - optional function to run after animation is done

- [animatedGifBoolean](boolean)  - optional set to display animated gif in firefox/chrome/safari

            !!! this might slow down browser because it need to render image again and

			again to display animation,

- [bind: [ {event: function}...] -optional parameter, list of events binded

  to newly created rotateable object



Examples:



		$(document).ready(function()

		{

			$('#image').rotate(-25);			

		});



		$(document).ready(function()

		{

			$('#image2').rotate({angle:5});	

		});



		$(document).ready(function()

		{

			var rot=$('#image3').rotate({maxAngle:25,minAngle:-55,

			bind:

				[

					{"mouseover":function(){rot[0].rotateAnimation(85);}},

					{"mouseout":function(){rot[0].rotateAnimation(-35);}}

				]

			});

		});

*/



(function($) {



jQuery.fn.extend({

ImageRotate:function(parameters)

{	

	if (this.Wilq32&&this.Wilq32.PhotoEffect) return;

	var paramClone = $.extend(true, {}, parameters)

	return (new Wilq32.PhotoEffect(this.get(0),paramClone))._temp;

},

rotate:function(parameters)

{

	if (this.length===0) return;

	if (typeof parameters=="undefined") return;

	if (typeof parameters=="number") parameters={angle:parameters};

	var returned=[];

	for (var i=0,i0=this.length;i<i0;i++)

	{

	    var element=this.get(i);	

		if (typeof element.Wilq32 == "undefined") 

			returned.push($($(element).ImageRotate(parameters)));

		else 

		{

			element.Wilq32.PhotoEffect._rotate(parameters.angle);

		}

	}

	return returned;

},



rotateAnimation:function(parameters)

{

	if (this.length===0) return;

	if (typeof parameters=="undefined") return;

	if (typeof parameters=="number") parameters={angle:parameters};

	var returned=[];

	for (var i=0,i0=this.length;i<i0;i++)

	{	

	    var element=this.get(i);

		if (typeof element.Wilq32 == "undefined") 

			returned.push($($(element).ImageRotate(parameters)));

		else 

		{

			element.Wilq32.PhotoEffect._parameters.animateAngle = parameters.angle;

			element.Wilq32.PhotoEffect._parameters.callback = parameters.callback || element.Wilq32.PhotoEffect._parameters.callback || function(){};

			element.Wilq32.PhotoEffect._animateStart();

		}

	}

	return returned;

}



});



Wilq32={};



Wilq32.PhotoEffect=function(img,parameters)

{

			this._img=img;

			this._parameters=parameters;

			this._parameters.className=img.className;

			this._parameters.id=img.getAttribute('id');

			this._parameters.animateAngle=0;

			

			if (!parameters) this._parameters={};

			this._angle=0;

			if (!parameters.angle) this._parameters.angle=0;

			this._temp=document.createElement('span');

			this._temp.style.display="inline-block";

			this._temp.Wilq32 = 

				{

					PhotoEffect: this

				};			

			img.parentNode.insertBefore(this._temp,img);

			this._img._ref=this;

			if (this._img.complete) {

				this._Loader();

			}

			else{

				jQuery(this._img).bind("load", function()

				{

					this._ref._Loader.call(this._ref);

				});

			}

}



if (jQuery.browser.msie)

{

Wilq32.PhotoEffect.prototype.createVMLNode=(function(){

document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");

        try {

            !document.namespaces.rvml && document.namespaces.add("rvml", "urn:schemas-microsoft-com:vml");

            return function (tagName) {

                return document.createElement('<rvml:' + tagName + ' class="rvml">');

            };

        } catch (e) {

            return function (tagName) {

                return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');

            };

        }

		

})();

}





Wilq32.PhotoEffect.prototype._Loader=

(function()

{

	if (jQuery.browser.msie)

	return function()

	{

		var src=this._img.src;

		//this._IEfix.src=""; // Fixes endless loading

		this._temp.setAttribute('id',this._parameters.id);

		this._temp.className=this._parameters.className;

		var width=this._img.width;

		var height=this._img.height;

		this._img.parentNode.removeChild(this._img);

			

		this._img._widthMax=this._img._heightMax=Math.sqrt((height)*(height) + (width) * (width));

		this._img._heightMax=Math.sqrt((height)*(height) + (width) * (width));

		

		this._vimage = this.createVMLNode('image');

		this._vimage._ref=this;

		this._vimage.style.height=height+"px";

		this._vimage.style.width=width+"px";

		this._temp.style.position="relative"; // FIXES IE PROBLEM

		this._vimage.style.position="absolute"; // FIXES IE PROBLEM - its only rendered if its on absolute position!

		

		this._temp.style.width=this._temp.style.height=this._img._heightMax+"px";

		this._vimage.src=src;

		this._temp.appendChild(this._vimage);

		//this._vimage.outerHTML = this._vimage.outerHTML;

		if (this._parameters.preservePosition){

			this._temp.style.width=width+"px";

			this._temp.style.height=height+"px";

			this._vimage.style.top = "0px";

			this._vimage.style.left = "0px";

		} else {

			this._vimage.style.top = (this._img._heightMax-height)/2;

			this._vimage.style.left = (this._img._widthMax-width)/2;

		}

		

		var self = this;

		if (this._parameters.bind) 

		{

			for (var a in this._parameters.bind) if (this._parameters.bind.hasOwnProperty(a)) 

			for (var b in this._parameters.bind[a]) if (this._parameters.bind[a].hasOwnProperty(b)) 

			jQuery(this._temp).bind(b,this._parameters.bind[a][b]);

		}

		this._rotate(this._parameters.angle);		

		

	}

	else

	return function ()

	{

		this._temp.setAttribute('id',this._parameters.id);

		this._temp.className=this._parameters.className;

		var width=this._img.width;

		var height=this._img.height;

		this._img.parentNode.removeChild(this._img);	

		this._img._widthMax=this._img._heightMax=Math.sqrt((height)*(height) + (width) * (width));



		this._canvas=document.createElement('canvas');

		this._canvas._ref=this;

		this._canvas.height=height;

		this._canvas.width=width;



		this._canvas.setAttribute('width',width);



		this._canvas.Wilq32 = this._temp.Wilq32;	

		this._temp.appendChild(this._canvas);

		if (this._parameters.preservePosition){

			this._temp.style.width=width+"px";

			this._temp.style.height=height+"px";

			this._canvas.style.position="relative";

			this._canvas.style.left = -(this._img._widthMax - width)/2 + "px";

			this._canvas.style.top = -(this._img._widthMax - height)/2 + "px";

		}



		var self = this;

		if (this._parameters.bind) 

		{

			for (var a in this._parameters.bind) if (this._parameters.bind.hasOwnProperty(a)) 

			for (var b in this._parameters.bind[a]) if (this._parameters.bind[a].hasOwnProperty(b)) 

			jQuery(this._canvas).bind(b,this._parameters.bind[a][b]);

		}

		this._cnv=this._canvas.getContext('2d');

		this._rotate(this._parameters.angle);

	}



})();



Wilq32.PhotoEffect.prototype._animateStart=function()

{	

	if (this._timer) clearTimeout(this._timer);

	this._animate();

}

Wilq32.PhotoEffect.prototype._animate=function()

{	

	if (this._canvas||this._vimage) this._angle-=(this._angle-this._parameters.animateAngle)*0.1;

	if (typeof this._parameters.minAngle!="undefined") if (this._angle<this._parameters.minAngle) this._angle=this._parameters.minAngle;

	if (typeof this._parameters.maxAngle!="undefined") if (this._angle>this._parameters.maxAngle) this._angle=this._parameters.maxAngle; 



	var checkEnd = !!Math.round(this._angle * 100 - this._parameters.animateAngle * 100) == 0 && !!this._timer;

	if (this._parameters.callback && checkEnd){

		this._parameters.callback();

	}

	

	if (checkEnd && !this._parameters.animatedGif) 

		{

			clearTimeout(this._timer);

		}

		else 

		{

			if (this._canvas||this._vimage) this._rotate(this._angle);

			var self = this;

			this._timer = setTimeout(function()

			{

				self._animate.call(self);

			}, 10);

		}

}



Wilq32.PhotoEffect.prototype._rotate = (function()

{

	if (jQuery.browser.msie)

	return function(angle)

	{

		this._vimage.style.rotation=angle;

		var radians=angle*Math.PI/180;

		//this._vimage.style.top=  (this._img._heightMax - this._img.height)/2- (this._vimage.offsetHeight-this._img.height)/2 +"px";

		//this._vimage.style.left= (this._img._widthMax - this._img.width)/2- (this._vimage.offsetWidth-this._img.width)/2 +"px";

	}

	else

	return function(angle)



	{



		if (!this._img.width) return;

		if (typeof angle!="number") return;

		angle=(angle%360)* Math.PI / 180;

		var width=this._img.width;

		var height=this._img.height;

		var widthAdd = this._img._widthMax - width;

		var heightAdd = this._img._heightMax - height;

		// clear canvas	

		this._canvas.width = width+widthAdd;

		this._canvas.height = height+heightAdd;



		//this._cnv.scale(0.8,0.8); // SCALE - if needed ;)

		

		// REMEMBER: all drawings are read from backwards.. so first function is translate, then rotate, then translate, translate..

		this._cnv.save();

		this._cnv.translate(widthAdd/2,heightAdd/2); // at least center image on screen

		this._cnv.translate(width/2,height/2);		  // we move image back to its orginal 

		this._cnv.rotate(angle);					  // rotate image

		this._cnv.translate(-width/2,-height/2);	  // move image to its center, so we can rotate around its center

		this._cnv.drawImage(this._img, 0, 0);		  // First - we draw image

		this._cnv.restore();

	}





})();

})(jQuery);