Po najechaniu kursorem na grafikę, pojawia się lupa. Sporadycznie spotykany efekt, wyglądający bardzo estetycznie.
Źródło:
http://cssdeck.com/labs/magnifying-glass-plugin-with-jquery-and-css3
HTML
<![CDATA[<link href="//fonts.googleapis.com/css?family=Ubuntu" rel="stylesheet" type="text/css">
<div id="wrap">
<h1>Super Cool Magnifying Glass For Image Zoom</h1>
<h2>Demo</h2>
<div class="product"><img class="magniflier" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vd2qM0V67rHDpOEPyyGb-ZxK6Dluns-FDfz2cp67oTgyg9gZr8eh7Fg5a2EA6v-WiO93_kFFGy5VHpuvEiRqXWDIG5dvUBEF0pBwwnVJewbIcvF7gR=s0-d" width="300"></div>
<div class="product"><img class="magniflier" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uvQgzSMf0cmmEkz00TvK20DfEM5aBK3jWRYo6TPBXfJMyeOhtagBfQVrhnHUz4Co-CVPhb_SFdnVNqb8MsRRe0wT1p_6VKYqePoG1-pBUgviK6QOA=s0-d" width="300"></div>
<div class="product"><img class="magniflier" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uTjElvpTgfAujnQ1oVdLNhIE9Fdp2Zyo3Vsa6rAm4LJCbHSXr4Nu12TGNlFtH9fcA9TtBHaG-8iAG-VJwKmE4VZ5HCbYq2Fz2wSiImAQHR0GlSt-wf=s0-d" width="300"></div>
<h2>Usage</h2>
<p><a href="http://codetheory.in/image-zoom-magnifying-glass-effect-with-css3-and-jquery/">Read this Article</a></p>
</div>
<!-- Time for jquery action -->
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
]]>
CSS
<![CDATA[.glass {
width: 175px;
height: 175px;
position: absolute;
border-radius: 50%;
cursor: crosshair;
/* Multiple box shadows to achieve the glass effect */
box-shadow:
0 0 0 7px rgba(255, 255, 255, 0.85),
0 0 7px 7px rgba(0, 0, 0, 0.25),
inset 0 0 40px 2px rgba(0, 0, 0, 0.25);
/* hide the glass by default */
display: none;
}
/*********
*** Styles just for DEMO purpose
*********/
body{
background: black url(http://subtlepatterns.subtlepatterns.netdna-cdn.com/patterns/wild_oliva.png);
font-family: 'ubuntu', arial, verdana;
color: #fff;
font-size: 14px;
}
#wrap {
max-width: 700px;
margin: 20px auto;
}
.product {
margin: 20px auto;
text-align: center;
padding: 20px;
}
h1, h2, h3 {
text-align: center;
margin: 50px 0;
font-size: 30px;
color: #fff;
text-shadow: 0 1px 5px rgba(0, 0, 0, 0.75);
}
h2 {
font-size: 26px;
margin: 25px 0;
}
a {
color: white;
}
]]>
JS
<![CDATA[$(function() {
var native_width = 0;
var native_height = 0;
var mouse = {x: 0, y: 0};
var magnify;
var cur_img;
var ui = {
magniflier: $('.magniflier')
};
// Add the magnifying glass
if (ui.magniflier.length) {
var div = document.createElement('div');
div.setAttribute('class', 'glass');
ui.glass = $(div);
$('body').append(div);
}
// All the magnifying will happen on "mousemove"
var mouseMove = function(e) {
var $el = $(this);
// Container offset relative to document
var magnify_offset = cur_img.offset();
// Mouse position relative to container
// pageX/pageY - container's offsetLeft/offetTop
mouse.x = e.pageX - magnify_offset.left;
mouse.y = e.pageY - magnify_offset.top;
// The Magnifying glass should only show up when the mouse is inside
// It is important to note that attaching mouseout and then hiding
// the glass wont work cuz mouse will never be out due to the glass
// being inside the parent and having a higher z-index (positioned above)
if (
mouse.x < cur_img.width() &&
mouse.y < cur_img.height() &&
mouse.x > 0 &&
mouse.y > 0
) {
magnify(e);
}
else {
ui.glass.fadeOut(100);
}
return;
};
var magnify = function(e) {
// The background position of div.glass will be
// changed according to the position
// of the mouse over the img.magniflier
//
// So we will get the ratio of the pixel
// under the mouse with respect
// to the image and use that to position the
// large image inside the magnifying glass
var rx = Math.round(mouse.x/cur_img.width()*native_width - ui.glass.width()/2)*-1;
var ry = Math.round(mouse.y/cur_img.height()*native_height - ui.glass.height()/2)*-1;
var bg_pos = rx + "px " + ry + "px";
// Calculate pos for magnifying glass
//
// Easy Logic: Deduct half of width/height
// from mouse pos.
// var glass_left = mouse.x - ui.glass.width() / 2;
// var glass_top = mouse.y - ui.glass.height() / 2;
var glass_left = e.pageX - ui.glass.width() / 2;
var glass_top = e.pageY - ui.glass.height() / 2;
//console.log(glass_left, glass_top, bg_pos)
// Now, if you hover on the image, you should
// see the magnifying glass in action
ui.glass.css({
left: glass_left,
top: glass_top,
backgroundPosition: bg_pos
});
return;
};
$('.magniflier').on('mousemove', function() {
ui.glass.fadeIn(100);
cur_img = $(this);
var large_img_loaded = cur_img.data('large-img-loaded');
var src = cur_img.data('large') || cur_img.attr('src');
// Set large-img-loaded to true
// cur_img.data('large-img-loaded', true)
if (src) {
ui.glass.css({
'background-image': 'url(' + src + ')',
'background-repeat': 'no-repeat'
});
}
// When the user hovers on the image, the script will first calculate
// the native dimensions if they don't exist. Only after the native dimensions
// are available, the script will show the zoomed version.
//if(!native_width && !native_height) {
if (!cur_img.data('native_width')) {
// This will create a new image object with the same image as that in .small
// We cannot directly get the dimensions from .small because of the
// width specified to 200px in the html. To get the actual dimensions we have
// created this image object.
var image_object = new Image();
image_object.onload = function() {
// This code is wrapped in the .load function which is important.
// width and height of the object would return 0 if accessed before
// the image gets loaded.
native_width = image_object.width;
native_height = image_object.height;
cur_img.data('native_width', native_width);
cur_img.data('native_height', native_height);
//console.log(native_width, native_height);
mouseMove.apply(this, arguments);
ui.glass.on('mousemove', mouseMove);
};
image_object.src = src;
return;
} else {
native_width = cur_img.data('native_width');
native_height = cur_img.data('native_height');
}
//}
//console.log(native_width, native_height);
mouseMove.apply(this, arguments);
ui.glass.on('mousemove', mouseMove);
});
ui.glass.on('mouseout', function() {
ui.glass.off('mousemove', mouseMove);
});
});
]]>
