;
(function ($, window, document, undefined) {
$.fn.jqueryzoom = function (options) {
var settings = {
xzoom: 110,
yzoom: 110,
offset: 10,
position: "right",
preload: 1,
clickAction: null,
hover: null,
hoverout:null,
};
if (options) {
$.extend(settings, options);
}
var noalt = '';
var self = this;
$(this).children('img').bind("mouseenter", function (ev) {
var imageLeft = $(this).offset().left;
var imageTop = $(this).offset().top;
var imageWidth = $(this).get(0).offsetWidth;
var imageHeight = $(this).get(0).offsetHeight;
var boxLeft = $(this).parent().offset().left;
var boxTop = $(this).parent().offset().top;
var boxWidth = $(this).parent().width();
var boxHeight = $(this).parent().height();
noalt = $(this).attr("alt");
var bigimage = $(this).attr("longdesc");
if ($("div.zoomDiv").get().length == 0) {
$(document.body).append("
");
if (typeof settings.hover == "function") {
settings.hover();
}
var g = this;
if (!$(this).closest("a").attr("href") || $(this).closest("a").attr("href") =="javascript:void(0)"){
if (settings.clickAction) {
if (!$("div.zoomMask").attr("onclick")) {
$("div.zoomMask").click(settings.clickAction);
}
}
} else {
$("div.zoomMask").click(function () {
var el = $(g).closest("a")[0];
var target = $(g).closest("a").attr("target");
el.target = target; //指定在新窗口打开
el.click();//触发打开事件
});
}
}
if (settings.position == "right") {
if (boxLeft + boxWidth + settings.offset + settings.xzoom > screen.width) {
leftpos = boxLeft - settings.offset - settings.xzoom;
} else {
leftpos = boxLeft + boxWidth + settings.offset;
}
} else {
leftpos = imageLeft - settings.xzoom - settings.offset;
if (leftpos < 0) {
leftpos = imageLeft + imageWidth + settings.offset;
}
}
$("div.zoomDiv").css({
top: boxTop,
left: leftpos
});
$("div.zoomDiv").width(settings.xzoom);
$("div.zoomDiv").height(settings.yzoom);
$("div.zoomDiv").show();
$(this).css('cursor', 'crosshair');
$(document.body).mousemove(function (e) {
mouse = new MouseEvent(e);
if (mouse.x < boxLeft || mouse.x > boxLeft + boxWidth || mouse.y < boxTop || mouse.y > boxTop + boxHeight) {
mouseOutImage();
return;
}
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);
var nw = (settings.xzoom) / scalex;
if (nw > imageWidth) {
nw = imageWidth;
}
var nh = (settings.yzoom) / scaley;
if (nh > imageHeight) {
nh = imageHeight;
}
$("div.zoomMask").width(80);
$("div.zoomMask").height(80);
$("div.zoomMask").css('visibility', 'visible');
}
xpos = mouse.x - $("div.zoomMask").width() / 2;
ypos = mouse.y - $("div.zoomMask").height() / 2;
xposs = mouse.x - $("div.zoomMask").width() / 2 - imageLeft;
yposs = mouse.y - $("div.zoomMask").height() / 2 - imageTop;
xpos = (mouse.x - $("div.zoomMask").width() / 2 < imageLeft) ? imageLeft : (mouse.x + $("div.zoomMask").width() / 2 > imageWidth + imageLeft) ? (imageWidth + imageLeft - $("div.zoomMask").width()) : xpos;
ypos = (mouse.y - $("div.zoomMask").height() / 2 < imageTop) ? imageTop : (mouse.y + $("div.zoomMask").height() / 2 > imageHeight + imageTop) ? (imageHeight + imageTop - $("div.zoomMask").height()) : ypos;
$("div.zoomMask").css({
top: ypos,
left: xpos
});
$("div.zoomDiv").get(0).scrollLeft = xposs * scalex;
$("div.zoomDiv").get(0).scrollTop = yposs * scaley;
});
});
function mouseOutImage() {
if (typeof settings.hoverout == "function") {
settings.hoverout();
}
$(self).attr("alt", noalt);
$(document.body).unbind("mousemove");
$("div.zoomMask").remove();
$("div.zoomDiv").remove();
}
count = 0;
if (settings.preload) {
$('body').append("");
$(this).each(function () {
var imagetopreload = $(this).find("img").attr("longdesc");
var content = jQuery('div.jqPreload' + count + '').html();
jQuery('div.jqPreload' + count + '').html(content + '');
});
}
}
})(jQuery, window, document);
function MouseEvent(e) { this.x = e.pageX; this.y = e.pageY; }