66 lines
2.5 KiB
JavaScript
66 lines
2.5 KiB
JavaScript
/*
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http://www.dailycoding.com/
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*/
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(function ($) {
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$.fn.imageLens = function (options) {
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var defaults = {
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lensSize: 100,
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borderSize: 4,
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borderColor: "#888"
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};
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var options = $.extend(defaults, options);
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var lensStyle = "background-position: 0px 0px;width: " + String(options.lensSize) + "px;height: " + String(options.lensSize)
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+ "px;float: left;display: none;border-radius: " + String(options.lensSize / 2 + options.borderSize)
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+ "px;border: " + String(options.borderSize) + "px solid " + options.borderColor
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+ ";background-repeat: no-repeat;position: absolute;";
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return this.each(function () {
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obj = $(this);
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var offset = $(this).offset();
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// Creating lens
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var target = $("<div style='" + lensStyle + "' class='" + options.lensCss + "'> </div>").appendTo($(this).parent());
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var targetSize = target.size();
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// Calculating actual size of image
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var imageSrc = options.imageSrc ? options.imageSrc : $(this).attr("src");
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var imageTag = "<img style='display:none;' src='" + imageSrc + "' />";
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var widthRatio = 0;
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var heightRatio = 0;
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$(imageTag).load(function () {
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widthRatio = $(this).width() / obj.width();
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heightRatio = $(this).height() / obj.height();
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}).appendTo($(this).parent());
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target.css({ backgroundImage: "url('" + imageSrc + "')" });
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target.mousemove(setPosition);
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$(this).mousemove(setPosition);
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function setPosition(e) {
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var leftPos = parseInt(e.pageX - offset.left);
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var topPos = parseInt(e.pageY - offset.top);
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if (leftPos < 0 || topPos < 0 || leftPos > obj.width() || topPos > obj.height()) {
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target.hide();
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}
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else {
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target.show();
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leftPos = String(((e.pageX - offset.left) * widthRatio - target.width() / 2) * (-1));
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topPos = String(((e.pageY - offset.top) * heightRatio - target.height() / 2) * (-1));
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target.css({ backgroundPosition: leftPos + 'px ' + topPos + 'px' });
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leftPos = String(e.pageX - target.width() / 2);
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topPos = String(e.pageY - target.height() / 2);
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target.css({ left: leftPos + 'px', top: topPos + 'px' });
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}
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}
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});
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};
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})(jQuery); |