/*
 * JQZoom Evolution 1.0.1 - Javascript Image magnifier
 *
 * Copyright (c) Engineer Renzi Marco(www.mind-projects.it)
 *
 * $Date: 12-12-2008
 *
 *	ChangeLog:
 *  
 * $License : GPL,so any change to the code you should copy and paste this section,and would be nice to report this to me(renzi.mrc@gmail.com).
 */
(function($)
{
    $.fn.jqzoom = function(options)
    {
        var settings = {
            zoomType: 'standard', //standard/reverse/innerzoom
            zoomWidth: 50,		//zoomed width default width
            zoomHeight: 50,		//zoomed div default width
            xOffset: 10,		//zoomed div default offset
            yOffset: 0,
            position: "right" ,//zoomed div default position,offset position is to the right of the image
            lens:true, //zooming lens over the image,by default is 1;
			lensReset : false,
			imageOpacity: 0.2,
			title : true,
			alwaysOn: false,
			showEffect: 'show',
			hideEffect: 'hide',
			fadeinSpeed: 'fast',
			fadeoutSpeed: 'slow',
			preloadImages :true,
			showPreload: true,
			preloadText : 'Loading zoom',
			preloadPosition : 'center',   //bycss
			cursor: 'pointer' //:ISC Change: add the cursor option, so it allows user to define a cursor style
        };

			//extending options
			options = options || {};
        	$.extend(settings, options);


		return this.each(function()
		{
		
		

			var lens = new Lens();
			var lensdata = {};
			//lensborder



			
			var scale = {}; //rapporto tra immagine grande e piccola scale.x/scale.y
			var stage = null; // quadrato che mostra l'immagine ingrandita
			var running = false; // running = true quando si verifica l'evento che mostra lo zoom(adesso mouseover).
			var mousepos = {};
			var firstime = 0;
			var preloadshow = false;
			var isMouseDown = false;
			var dragstatus = false


			//ritorna false al click dell href
			

			//se settato alwaysOn attivo lo Zoom e lo mostro.

			//attivo al mouseover


			//ALWAYS ON
		


			function activate()
			{

				if ( !running ) {

				

					running = true;

					//rimuovo il titolo al mouseover
				
					if(!largeimageloaded || $.browser.safari)
					{
				
					}else
					{
					//after preload
						if(settings.zoomType != 'innerzoom')
						{
							stage = new Stage();
							stage.activate();
						}
						lens = new Lens;
						lens.activate();
					}

			
					a[0].blur();
	
					return false;
				}




			}

			



	


		//Lens
		function Lens()
		{


			//creating element and adding class
			this.node = document.createElement("div");
			$(this.node).addClass('jqZoomPup');

			this.node.onerror = function() {
				$( lens.node ).remove();
				lens = new Lens();
				lens.activate() ;
			};




			//funzione privata per il caricamento dello zoom
			this.loadlens = function()
			{


				switch(settings.zoomType)
				{
					case 'reverse':
						this.image = new Image();
	
						this.node.appendChild( this.image );
						$( this.node ).css({'opacity' : 1});
					break;
					case 'innerzoom':

						this.image = new Image();
			
						this.node.appendChild( this.image );
						$( this.node ).css({'opacity' : 1});
					break
					default:
					break;
				}



				switch(settings.zoomType)
				{
					case 'innerzoom':

					break;
					default:
						lensdata.w = (settings.zoomWidth)/scale.x;
						lensdata.h = (settings.zoomHeight)/scale.y;
					break;
				}

			$( this.node ).css({
					width: lensdata.w + 'px',
					height: lensdata.h + 'px',
					position: 'absolute',
					/*cursor: 'crosshair',*/
					display: 'none',
					//border: '1px solid blue'
					borderWidth: 1+'px'
				});
			a.append(this.node);
			}
			return this;
		};

		Lens.prototype.activate = function()
		{
			//carico la lente
			this.loadlens();

			switch(settings.zoomType)
			{
				case 'reverse':
					img.css({'opacity' : settings.imageOpacity});

					(settings.alwaysOn) ? lens.center() : lens.setposition(null);
					//lens.center();
					//bindo ad a il mousemove della lente
					a.bind( 'mousemove', function(e)
					{
						mousepos.x = e.pageX;
						mousepos.y = e.pageY;
						lens.setposition( e );
					});
				break;
				case 'innerzoom':

					//	lens = new Lens();
					//	lens.activate();

			
					largeimage.setcenter();

				   	a.bind( 'mousemove', function(e)
				   	{
						mousepos.x = e.pageX;
						mousepos.y = e.pageY;
		

					/*if(settings.zoomType == 'innerzoom' && running)
					{
						$(a).mousemove(function(){
							if($('div.jqZoomPup').length <= 0)
							{
								lens = new Lens();
								lens.activate();
							}
						});
					}*/

						/*if($('div.jqZoomPup').length <= 0)
							{
								lens = new Lens();
								lens.activate();
							}*/

					});
				break;
				default:
					


					(settings.alwaysOn) ? lens.center() : lens.setposition(null);

					//bindo ad a il mousemove della lente
					$(a).bind( 'mousemove', function(e)
					{

						mousepos.x = e.pageX;
						mousepos.y = e.pageY;
						lens.setposition( e );
					});

				break;
			}


			return this;
		};

		Lens.prototype.setposition = function( e)
		{


		



			return this;
		};


		//mostra la lente al centro dell'immagine
		Lens.prototype.center = function()
		{
			$('div.jqZoomPup',a).css('display','none');

			this.node.style.left = lensleft + 'px';
			this.node.style.top = lenstop + 'px';
			$('div.jqZoomPup',a).css({top: lenstop,left: lensleft });

			if(settings.zoomType == 'reverse')
			{
				/*if($.browser.safari){
					alert('safari');
					alert(2*bleft);
					$('div.jqZoomPup img',a).css({'position': 'absolute','top': -( lenstop - btop +1) ,'left': -(lensleft - 2*bleft)  });
				}else
				{*/
					$('div.jqZoomPup img',a).css({'position': 'absolute','top': -(lenstop - btop + 1) ,'left': -( lensleft  - bleft +1)   });
				//}
			}

			if($.browser.msie)
			{
				$('div.jqZoomPup',a).show();
			}else
			{
				setTimeout(function(){$('div.jqZoomPup').fadeIn('fast');},10);
			}
		};


		//ritorna l'offset
		Lens.prototype.getoffset = function() {
			var o = {};
			o.left = parseInt(this.node.style.left) ;
			o.top =  parseInt(this.node.style.top) ;
			return o;
		};

		//rimuove la lente
		Lens.prototype.remove = function()
		{

			if(settings.zoomType == 'innerzoom')
			{
				$('div.jqZoomPup',a).fadeOut('fast',function(){/*$('div.jqZoomPup img').remove();*/$(this).remove();});
			}else
			{
				//$('div.jqZoomPup img').remove();
				$('div.jqZoomPup',a).remove();
			}
		};

		Lens.prototype.findborder = function()
		{
			var bordertop = '';
			bordertop = $('div.jqZoomPup').css('borderTop');
			//alert(bordertop);
			lensbtop = '';
			var borderleft = '';
			borderleft = $('div.jqZoomPup').css('borderLeft');
			lensbleft = '';
			if($.browser.msie)
			{
				var temp = bordertop.split(' ');

				bordertop = temp[1];
				var temp = borderleft.split(' ');
				borderleft = temp[1];
			}

			if(bordertop)
			{
				for(i=0;i<3;i++)
				{
					var x = [];
					x = bordertop.substr(i,1);

					if(isNaN(x) == false)
					{
						lensbtop = lensbtop +''+ bordertop.substr(i,1);
					}else
					{
						break;
					}
				}
			}

			if(borderleft)
			{
				for(i=0;i<3;i++)
				{
					if(!isNaN(borderleft.substr(i,1)))
					{
						lensbleft = lensbleft + borderleft.substr(i,1)
					}else
					{
						break;
					}
				}
			}


			lensbtop = (lensbtop.length > 0) ? eval(lensbtop) : 0;
			lensbleft = (lensbleft.length > 0) ? eval(lensbleft) : 0;
		}

		//LARGEIMAGE
	


		//STAGE
		function Stage()
		{

			
			return this;
		}


		Stage.prototype.activate = function()
		{

			if ( !this.node.firstChild )
					


			document.body.appendChild( this.node );


			switch(settings.showEffect)
			{
				case 'show':
					$(this.node).show();
				break;
				case 'fadein':
					$(this.node).fadeIn(settings.fadeinSpeed);
				break;
				default:
					$(this.node).show();
				break;
			}

			$(this.node).show();

            if ($.browser.msie && $.browser.version < 7) {
	        this.ieframe = $('<iframe class="zoom_ieframe" frameborder="0" src="#"></iframe>')
	          .css({ position: "absolute", left:this.node.style.left,top:this.node.style.top,zIndex: 99,width:settings.zoomWidth,height:settings.zoomHeight })
	          .insertBefore(this.node);
	     	 };


			
		}

		Stage.prototype.remove = function() {
			
		}



		function Loader()
		{

			this.node = document.createElement("div");
			$(this.node).addClass('preload');
			$(this.node).html(settings.preloadText);//appendo il testo

			$(this.node )
				.appendTo("body")
				.css('visibility','hidden');



			this.show = function()
			{
				switch(settings.preloadPosition)
				{
					case 'center':

					break;
					default:
					var loaderoffset = this.getoffset();

					break;
				}

				//setting position
				$(this.node).css({
							top: loadertop  ,
							left: loaderleft ,
							position: 'absolute',
							visibility:'visible'
					    	});
			}
			return this;
		}

		Loader.prototype.getoffset = function()
		{
			var o = null;
			o = $('div.preload').offset();
			return o;
		}

		});
	}
})(jQuery);