/* Simple Image Panner and Zoomer (March 11th, 10)
* This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

// v1.1 (March 25th, 10): Updated with ability to zoom in/out of image

jQuery.noConflict();


var ddimagepanner = {

    magnifyicons: ['../images/mega/plus.gif', '../images/mega/minus.gif', '../images/mega/reset.gif', 29, 28], //set path to zoom in/out images, plus their dimensions
    maxzoom: 2, //set maximum zoom level (from 1x)

    init: function($, $img, options) {

        var s = options;
        s.imagesize = [$img.width(), $img.height()];
        s.oimagesize = [$img.width(), $img.height()]; //always remember image's original size
        s.pos = (s.pos == "center") ? [-(s.imagesize[0] / 2 - s.wrappersize[0] / 2), -(s.imagesize[1] / 2 - s.wrappersize[1] / 2)] : [0, 0]; //initial coords of image
        s.pos = [Math.floor(s.pos[0]), Math.floor(s.pos[1])];
        $img.css({ 'position': 'absolute', 'left': s.pos[0], 'top': s.pos[1] });
        if (s.canzoom == "yes") { //enable image zooming?
            s.dragcheck = { h: (s.wrappersize[0] > s.imagesize[0]) ? false : true, v: (s.wrappersize[1] > s.imagesize[1]) ? false : true }; //check if image should be draggable horizon and vertically
            s.$statusdiv = $('<div style="position:absolute;color:white;background:#353535;padding:2px 10px;font-size:12px;visibility:hidden">1x Magnify</div>').appendTo(s.$pancontainer); //create DIV to show current magnify level
            s.$statusdiv.css({ left: 0, top: s.wrappersize[1] - s.$statusdiv.outerHeight(), display: 'none', visibility: 'visible' });
            
			
			//this.zoomfunct($, $img, s);


        }
        this.dragimage($, $img, s);
    },

    dragimage: function($, $img, s) {

        $img.mousedown(function(e) {
            s.pos = [parseInt($img.css('left')), parseInt($img.css('top'))];
            var xypos = [e.clientX, e.clientY];
            $img.bind('mousemove.dragstart', function(e) {
                var pos = s.pos, imagesize = s.imagesize, wrappersize = s.wrappersize;
                var dx = e.clientX - xypos[0]; //distance to move horizontally
                var dy = e.clientY - xypos[1]; //vertically
                s.dragcheck = { h: (wrappersize[0] > imagesize[0]) ? false : true, v: (wrappersize[1] > imagesize[1]) ? false : true };
                if (s.dragcheck.h == true) //allow dragging horizontally?
                    var newx = (dx > 0) ? Math.min(0, pos[0] + dx) : Math.max(-imagesize[0] + wrappersize[0], pos[0] + dx); //Set horizonal bonds. dx>0 indicates drag right versus left
                if (s.dragcheck.v == true) //allow dragging vertically?
                    var newy = (dy > 0) ? Math.min(0, s.pos[1] + dy) : Math.max(-imagesize[1] + wrappersize[1], pos[1] + dy); //Set vertical bonds. dy>0 indicates drag downwards versus up
                $img.css({ left: (typeof newx != "undefined") ? newx : pos[0], top: (typeof newy != "undefined") ? newy : pos[1] });
                return false; //cancel default drag action
            });
            return false; //cancel default drag action
        })
        $(document).bind('mouseup', function(e) {
            $img.unbind('mousemove.dragstart');
        })
    },

    zoomfunct: function($, $img, s) {

        var magnifyicons = this.magnifyicons;


        var $zoomimages = $('<img id="imgZO" src="' + magnifyicons[0] + '" title="Zoom In"/>&nbsp;&nbsp;<img id="imgZI" src="' + magnifyicons[1] + '"  title="Zoom Out"/>&nbsp;&nbsp;<img id="imgreset" src="' + magnifyicons[2] + '"  title="Reset"/>')
        			.css({ 'width': magnifyicons[3], 'height': magnifyicons[4], 'cursor': 'pointer', 'zIndex': 1000, 'opacity': 0.7 });



        $zoomimages.eq(0).css({ 'opacity': 1 }); //position "zoom in" image

        $zoomimages.eq(1).css({ 'opacity': 0.7 }); //position "zoom out" image

        $zoomimages.click(function(e) { //assign click behavior to zoom images
            var $zimg = $(this); //reference image clicked on
            var curzoom = s.curzoom; //get current zoom level
            var zoomtype;
            if ($zimg.attr("title").indexOf("In") != -1) {
                zoomtype = 'in';
            }
            else if ($zimg.attr("title").indexOf("Out") != -1) {
                zoomtype = 'out';
            } else {
                zoomtype = 'reset';
                //$zoomimages.eq(2).css("opacity", 0.7);
            }

            if ((zoomtype == "in" && s.curzoom == ddimagepanner.maxzoom) || (zoomtype == "out" && s.curzoom == 1) || (zoomtype == "reset" && s.curzoom == 1)) //exit if user at either ends of magnify levels
                return;
            var basepos = [s.pos[0] / curzoom, s.pos[1] / curzoom];
            var newzoom;
            if (zoomtype == "out") {
                newzoom = Math.max(1, curzoom - 1);
            } else if (zoomtype == "in") {
                newzoom = Math.min(ddimagepanner.maxzoom, curzoom + 1);
            } else {
                newzoom = 1;
            }
            //= (zoomtype == "out") ? Math.max(1, curzoom - 1) : Math.min(ddimagepanner.maxzoom, curzoom + 1); //get new zoom level
            //if (newzoom == "reset") newzoom = Math.max(1, 1);
            $zoomimages.css("opacity", 1);
            if (newzoom == 1) { //if zoom level is 1x, dim "zoom out" image
                //$zoomimages.eq(1).css("opacity", 0.7);
                //$zoomimages.eq(2).css("opacity", 0.7);
            }
            else if (newzoom == ddimagepanner.maxzoom) //if zoom level is max level, dim "zoom in" image
                //$zoomimages.eq(0).css("opacity", 0.7);
            clearTimeout(s.statustimer);
            s.$statusdiv.html(newzoom + "x Magnify").show(); //show current zoom status/level
			//alert($img.width());
			//alert($img.height());
            var nd = [s.oimagesize[0] * newzoom, s.oimagesize[1] * newzoom];
            var newpos = [basepos[0] * newzoom, basepos[1] * newzoom];
            newpos = [((zoomtype == "in" && s.wrappersize[0] > s.imagesize[0]) || (zoomtype == "out" && s.wrappersize[0] > nd[0])) ? s.wrappersize[0] / 2 - nd[0] / 2 : Math.max(-nd[0] + s.wrappersize[0], newpos[0]),
				((zoomtype == "in" && s.wrappersize[1] > s.imagesize[1]) || (zoomtype == "out" && s.wrappersize[1] > nd[1])) ? s.wrappersize[1] / 2 - nd[1] / 2 : Math.max(-nd[1] + s.wrappersize[1], newpos[1])];
            $img.animate({ 'width': nd[0], 'height': nd[1], 'left': newpos[0], 'top': newpos[1] }, function() {
                s.statustimer = setTimeout(function() { s.$statusdiv.hide() }, 100);
            });

            s.imagesize = nd;
            s.curzoom = newzoom;
            s.pos = [newpos[0], newpos[1]];
        })
		if($('.imgBtn').html()=="" )
	        $('.imgBtn').append($zoomimages);

    }


}


jQuery.fn.imgmover = function(options) {

    var $ = jQuery;
    return this.each(function() { //return jQuery obj
        if (this.tagName != "IMG")
            return true; //skip to next matched element 
        var $imgref = $(this);
        if (parseInt(this.style.width) > 0 && parseInt(this.style.height) > 0) //if image has explicit CSS width/height defined
            ddimagepanner.init($, $imgref, options);
        else if (this.complete) { //account for IE not firing image.onload
            ddimagepanner.init($, $imgref, options);
        }
        else {
            $imgref.bind('load', function() {
                ddimagepanner.init($, $imgref, options);
            });
        }
    })
}