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javascript - html javascript css 放大镜

转载 作者:太空宇宙 更新时间:2023-11-03 23:09:27 28 4
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$(document).ready(function(){

var native_width = 0;
var native_height = 0;

//Now the mousemove function
$(".magnify").mousemove(function(e){
//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)
{
//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.src = $(".small").attr("src");

//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;
}
else
{
//x/y coordinates of the mouse
//This is the position of .magnify with respect to the document.
var magnify_offset = $(this).offset();
//We will deduct the positions of .magnify from the mouse positions with
//respect to the document to get the mouse positions with respect to the
//container(.magnify)
var mx = e.pageX - magnify_offset.left;
var my = e.pageY - magnify_offset.top;

//Finally the code to fade out the glass if the mouse is outside the container
if(mx < $(this).width() && my < $(this).height() && mx > 0 && my > 0)
{
$(".large").fadeIn(100);
}
else
{
$(".large").fadeOut(100);
}
if($(".large").is(":visible"))
{
//The background position of .large will be changed according to the position
//of the mouse over the .small image. So we will get the ratio of the pixel
//under the mouse pointer with respect to the image and use that to position the
//large image inside the magnifying glass
var rx = Math.round(mx/$(".small").width()*native_width - $(".large").width()/2)*-1;
var ry = Math.round(my/$(".small").height()*native_height - $(".large").height()/2)*-1;
var bgp = rx + "px " + ry + "px";

//Time to move the magnifying glass with the mouse
var px = mx - $(".large").width()/2;
var py = my - $(".large").height()/2;
//Now the glass moves with the mouse
//The logic is to deduct half of the glass's width and height from the
//mouse coordinates to place it with its center at the mouse coordinates

//If you hover on the image now, you should see the magnifying glass in action
$(".large").css({left: px, top: py, backgroundPosition: bgp});
}
}
})
})
/*Some CSS*/
* {margin: 0; padding: 0;}
.magnify {width: 200px; margin: 50px auto; position: relative;}

/*Lets create the magnifying glass*/
.large {
width: 175px; height: 175px;
position: absolute;
border-radius: 100%;

/*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);

/*Lets load up the large image first*/
background: url('http://thecodeplayer.com/uploads/media/iphone.jpg') no-repeat;

/*hide the glass by default*/
display: none;
}

/*To solve overlap bug at the edges during magnification*/
.small { display: block; }
<!-- Lets make a simple image magnifier -->
<div class="magnify">
<div>I want to magnify whole page Including text image and everything</div>
<!-- This is the magnifying glass which will contain the original/large version -->
<div class="large"></div>

<!-- This is the small image -->
<img class="small" src="http://thecodeplayer.com/uploads/media/iphone.jpg" width="200"/>

</div>

<!-- Lets load up prefixfree to handle CSS3 vendor prefixes -->
<script src="http://thecodeplayer.com/uploads/js/prefixfree.js" type="text/javascript"></script>
<!-- You can download it from http://leaverou.github.com/prefixfree/ -->

<!-- Time for jquery action -->
<script src="http://thecodeplayer.com/uploads/js/jquery-1.7.1.min.js" type="text/javascript"></script>

我想要放大镜放大整个网页,而不仅仅是图像。放大镜放大页面图像文本视频上的所有内容。并且在 div 或网页上没有任何内容时不会消失。

这是 jsfiddle...

JsFiddle

最佳答案

我正在使用 anythingzoomer 来完成您的需要。它能够放大文本和图像。需要有重复的html元素才能完成放大。

在这里您可以了解更多信息及其文档 AnythingZoomer

HTML

<p><strong>Image with Text Demo</strong></p>

<div id="zoom">

<div class="small">
<p>hello</p>
<img src="http://thecodeplayer.com/uploads/media/iphone.jpg" />
</div>

<div class="large">
<p>hello</p>
<img src="http://thecodeplayer.com/uploads/media/iphone.jpg" />
</div>

</div>

CSS

/* This is where to style the magnification to a circle*/
.az-windowed {
overflow: hidden;
position: absolute;
border-radius:100%;
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);
}

The Code in Action - Updated

关于javascript - html javascript css 放大镜,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33322239/

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