//**************************************************************
// jQZoom allows you to realize a small magnifier window,close
// to the image or images on your web page easily.
//
// jqZoom version 2.1
// Author Doc. Ing. Renzi Marco(www.mind-projects.it)
// First Release on Dec 05 2007
// i'm searching for a job,pick me up!!!
// mail: renzi.mrc@gmail.com
//**************************************************************

(function($){
	$.fn.jqueryzoom = function(options){

		var settings = {
			xzoom: 200,		//zoomed width default width
			yzoom: 200,		//zoomed div default width
			offset: 10,		//zoomed div default offset
			offsetTop: 0,		//zoomed div default top offset
			position: "right" ,//zoomed div default position,offset position is to the right of the image
			lens:1, //zooming lens over the image,by default is 1;
			preload: 1
		};

		if(options) {
			$.extend(settings, options);
		}

	    var noalt='';

	    $(this).hover(function() {
		    var imageLeft = this.offsetLeft;
		    var imageRight = this.offsetRight;
		    var imageTop =  $(this).get(0).offsetTop;
		    var imageWidth = $(this).children('img').get(0).offsetWidth;
		    var imageHeight = $(this).children('img').get(0).offsetHeight;
////		    var imageLeft = this.getBoundingClientRect().left;
////		    var imageRight = this.getBoundingClientRect().right;
			var image = $(this).children('img').get(0);
//		    var imageLeft = image.getBoundingClientRect().left;
//		    var imageRight = image.getBoundingClientRect().right;
//		    var imageTop =  image.getBoundingClientRect().top;
//		    var imageWidth = image.offsetWidth;
//		    var imageHeight = image.offsetHeight;

            noalt= $(this).children("img").attr("alt");

		    var bigimage = $(this).children("img").attr("jqimg");

            $(this).children("img").attr("alt",'');

		    if($("div.zoomdiv").get().length == 0){
			    $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");
			    $(this).append("<div class='jqZoomPup'>&nbsp;</div>");
		    }

		    if(settings.position == "right"){
	            if (imageLeft + imageWidth + settings.offset + settings.xzoom > screen.width) {
	            	leftpos = imageLeft  - settings.offset - settings.xzoom;
	            } else {
			    	leftpos = imageLeft + imageWidth + settings.offset;
	            }
		    }else{
			    leftpos = imageLeft - settings.xzoom - settings.offset;
			    if (leftpos < 0){
		            leftpos = imageLeft + imageWidth  + settings.offset;
			    }
		    }

	    	imageTop += settings.offsetTop;
		    
		    $("div.zoomdiv").css({ top: imageTop,left: leftpos });
		    $("div.zoomdiv").width(settings.xzoom);
		    $("div.zoomdiv").height(settings.yzoom);
            $("div.zoomdiv").show();

            if(!settings.lens){
              $(this).css('cursor','crosshair');
			}

			$(document.body).mousemove(function(e){
				mouse = new MouseEvent(e);
	
			    var bigwidth = $(".bigimg").get(0).offsetWidth;
			    var bigheight = $(".bigimg").get(0).offsetHeight;
			    var scaley ='x';
			    var scalex= 'y';
	
			    if (isNaN(scalex)|isNaN(scaley)){
				    var scalex = (bigwidth/imageWidth);
				    var scaley = (bigheight/imageHeight);
	
				    $("div.jqZoomPup").width((settings.xzoom)/scalex );
		    		$("div.jqZoomPup").height((settings.yzoom)/scaley);
	
					if (settings.lens){
	                    $("div.jqZoomPup").css('visibility','visible');
					}
				}
	
				xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;
	            ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop;
	
				if(settings.lens){
					xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;
					ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;
//		            $("div.jqZoomPup").css({ top: ypos + imageTop,left: xpos + imageLeft });
		            $("div.jqZoomPup").css({ top: ypos,left: xpos });
//alert(ypos + imageTop + " " + xpos + imageLeft);	
	            }

				scrolly = ypos;
				$("div.zoomdiv").get(0).scrollTop = scrolly * scaley;
				scrollx = xpos;
				$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;
			});
		},function(){
			$(this).children("img").attr("alt",noalt);
			$(document.body).unbind("mousemove");
			if(settings.lens){
				$("div.jqZoomPup").remove();
			}
			$("div.zoomdiv").remove();
	    });
	
	    count = 0;
	
		if(settings.preload) {
			$('body').append("<div style='display:none;' class='jqPreload"+count+"'>sdsdssdsd</div>");
			
			$(this).each(function(){
				var imagetopreload= $(this).children("img").attr("jqimg");
				var content = jQuery('div.jqPreload'+count+'').html();
				jQuery('div.jqPreload'+count+'').html(content+'<img src=\"'+imagetopreload+'\">');
			});
		}
	}

})(jQuery);

function MouseEvent(e) {
	this.x = e.pageX
	this.y = e.pageY
}