jQuery chili Picture Remote Amplification Plugin _jquery

In order to allow local pictures, remote pictures, too small pictures are adapted to this plug-in, there are many details to deal with.

First, define the structure:

 
<div class="imgMagnifierWrap"> 
<div class="overlay"><!--覆盖层，鼠标的感应区域，位于小图上最方--></div> 
<div class="tipboxHover"><!--小图上方的悬停提示方框--></div> 
<div class="imgOriginal"><!--装载大图的容器，绝对定位<!--前景大图，绝对定位--></div> 
</div> 
 

 
<!--样式--> 
<style type="text/css"> 
.imgMagnifierWrap *{position:absolute;background:#fff;} 
.imgMagnifierWrap .tipboxHover{width:80px; height:60px; filter:alpha(opacity=30);opacity:.3;display:none;} 
.imgMagnifierWrap .imgOriginal{display:none;z-index:9999;overflow:hidden; width:400px; height:400px; 
    background-color:#cdf; background-repeat:no-repeat; text-align:center;border:1px solid #555; } 
.imgMagnifierWrap .overlay{cursor:crosshair;filter:alpha(opacity=0);opacity:0;} 
<style> 

Then consider the picture preload:

 
$.imgPreloader=function(url,eventLists){ 
var img=new Image(); 
var $img=$(img); 
img.src=url; 
$.each(eventLists,function(type,fn){ 
$img.bind(type,fn); 
}); 
$img.trigger(img.complete?'load':'begin'); 
return $img; 
}; 

Re-compute the sensing area:

The small image is in the sensing area of the four

edges minus the rectangle indicating the 1/2 size of the four sides of the box, and the area outside is shown to the larger chart boundary:

 
var borderLeft =thumbInfo.left+tipboxInfo.width/2; 
var ratioX=(mouseInfo.x-borderLeft)/(thumbInfo.width-tipboxInfo.width); 

The problem with using large graphs for background pictures:

with hidden foreground picture preload, load event judgment time, Ie,chrome Normal, FF request two times picture, picture is not cached;

in another way, do not preload a large image. To directly in the large map position with the overlay to do "loading", chrome under the performance of progressive loading pictures, non-chrome is directly displayed, slightly regret.

The final result is to make the big picture a foreground picture:

The

advantage is that the load and error events for large graphs can work correctly:

  $.imgpreloader ($anchor. attr (' href '), {load:function () {IsI 
Mageready=true; 
$o. Empty (). append (this); 
SetTimeout (autofitpicture,0); 
}, Begin:function () {$o. Text (' Loading ... '); 
}, Error:function () {isimageready=true; 
$o. Text (' invalid picture! '); 
} 
}); 

Large image preload load events and small map MouseMove event synchronization Solution: Real-time storage of mouse coordinates, the prompt box positioning and large map positioning method separation.

 
  //鼠标位置存储 
var mouseInfo={x:0,y:0}; 
//指示框定位 
var setTipboxPosition=function(e){ 
mouseInfo.x=e.pageX; 
mouseInfo.y=e.pageY; 
$tipbox.css({ 
top:mouseInfo.y<thumbInfo.width/2+thumbInfo.top 
?Math.max(mouseInfo.y-tipboxInfo.height/2,thumbInfo.top) 
:Math.min(mouseInfo.y-tipboxInfo.height/2,thumbInfo.top+thumbInfo.height-tipboxInfo.height), 
left:mouseInfo.x<thumbInfo.width/2+thumbInfo.left 
?Math.max(mouseInfo.x-tipboxInfo.width/2,thumbInfo.left) 
:Math.min(mouseInfo.x-tipboxInfo.width/2,thumbInfo.left+thumbInfo.width-tipboxInfo.width) 
});   
setImgPosition(); 
}; 

Incidentally, if you have a browser, you might be lucky.
Demo Code
Package Download http://www.jb51.net/jiaoben/22866.html