<!DOCTYPE html >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
.newStyle1
{
background-color: #C0C0C0;
border: 1px solid #00FFFF;
position: absolute;
top: 308px;
left: 17px;
}
</style>
<script type="text/javascript" src="https://img.jb51.net/jslib/jquery/jquery.js" > </script>
<script type="text/javascript">
function toBreakWord(intLen, obj)//断词换行的函数
{
var strContent=obj.innerHTML;
var strTemp="";
while(strContent.length>intLen){
strTemp+=strContent.substr(0,intLen)+"<br>";
strContent=strContent.substr(intLen,strContent.length);
}
strTemp+= strContent;
obj.innerHTML=strTemp;
}
</script>
<script type="text/javascript" >
(function($){
$.fn.polaTip=function(){
var tips={};//tip
var tip= $("<canvas></canvas>") //text-align:center;vertical-align:maddle;
var div=$("<div>").append(tip);
div.appendTo("body");
var cxt = tip[0].getContext("2d");
this.each(function(){
var $that=$(this);
var offset= $that.offset();
var setleft=offset.left;
var settop=offset.top;
var theTip={};
var title= $("<p></p>");
theTip.title=title;
var fontSize=16;
//var fontSize=parseInt(theTip.title.css("fontSize"));
title.css("opacity",0);
div.append(theTip.title);
titleString=$that.attr("title");
var titleStringLength=titleString.length;
$that.attr("title","");
theTip.title.text(titleString);
theTip.titleWidth= theTip.title.width();
theTip.that=$that;
if(this.id) {tips[this.id]=theTip;}
else{$that.addClass(Math.random()+"");tips[$that.attr("class")]=theTip;}
if(theTip.titleWidth>250||titleStringLength>(250/fontSize)){
var rowLength=Math.sqrt(titleStringLength*(5/1))*fontSize;
toBreakWord( (rowLength*1.3)/fontSize,theTip.title[0]);
theTip.title.css("width",rowLength);
}
else{theTip.title.css({"width":titleStringLength*fontSize+10});}//,whiteSpace:"nowrap"
$that.hover(
function(){
var theTip=null;
if(this.id){theTip=tips[this.id];}
else{theTip=tips[this.className];}
var title=theTip.title;
var height=title.height()*1.1+20;
var width=title.width()*1.1+20;
title.css({top:title.height()*0.1*0.5+10+"px",left:width*0.1+2+"px"});
tip.css({height:height+"px",width:width+"px"});
var lingrad = cxt.createLinearGradient(0,0,0,150);
lingrad.addColorStop(0, '#00ABEB');
lingrad.addColorStop(0.5, 'rgba(10, 150, 255, 0.9)');
cxt.strokeStyle=lingrad;
var radgrad = cxt.createRadialGradient(150,75,10,150,75,150);
radgrad.addColorStop(0, 'rgba(10, 150, 255, 0.3)');
radgrad.addColorStop(0.5, 'rgba(10, 150, 255, 0.3)');
radgrad.addColorStop(1, 'rgba(256,256,256,0.5)');
cxt.fillStyle=radgrad ;
cxt.lineJoin="round";
cxt.lineWidth=2;
cxt.clearRect(0,0,300,150);
cxt.beginPath();
cxt.moveTo(30.5,5.5);
cxt.lineTo(285.5,5.5);
cxt.lineTo(285.5,135.5);
cxt.lineTo(75.5,135.5);
cxt.lineTo(2.5,148.5);
cxt.lineTo(30.5,125.5);
cxt.lineTo(30.5,5.5);
cxt.stroke();
cxt.fillStyle="#fff";
cxt.fill();
cxt.fillStyle=radgrad ;
cxt.fill();
for(var flagtip in tips)
{ flagtip=tips[flagtip];
if(flagtip==theTip){flagtip.title.css("opacity",1);}
else{
if(flagtip.title.css){flagtip.title.css("opacity",0);}
}
}
div.css({left:setleft+$that.width()+"px",top:settop-2*tip.height()+"px",opacity:0,height:height,width:width});
div.stop();
div.animate({top:settop-tip.height()+"px",opacity:1},500)
},
function(){
div.stop();
div.animate({top:settop-2*tip.height()+"px",opacity:0},1000)
})//hover
})//each
}
})(jQuery)
$(function(){
$("div p").children().add("#Button1").polaTip();
})
</script>
</head>
<body>
<div>
<h2>Pola的实验室</h2>
<ul>
<li>作为实验，"W3C"，"麻省理工学院"，"万维网"，"HTML","CSS","XML",和那个诡异的按钮都是有tip的，内容保存在title里</li>
<li>添加功能的语句：$("div p").children().add("#Button1").polaTip();</li>
<li>此插件只能运行于支持canvas标签的浏览器上</li>
<li>注：没用excanvas.js来支持IE下的canvas是因为这个文件太大，单单用来画提示框就太浪费了</li>
</ul>
</div>
<div> <p>W3C是英文 World Wide Web Consortium 的缩写，中文意思是<abbr title="World Wide Web Consortium"> W3C</abbr>理事会或万维网联盟。W3C于1994年10月在<a href="#" title="麻省理工学院（Massachusetts Institute of Technology，缩写：MIT）是美国一所综合性私立大学"> 麻省理工学院</a> 计算机科学实验室成立。创建者是<abbr title="World Wide Web"> 万维网</abbr> 的发明者Tim Berners-Lee。 W3C组织是对网络标准制定的一个非赢利组织，像<abbr title="HyperText Mark-up Language"> HTML</abbr> 、XHTML 、<abbr title="Cascading Style Sheet"> CSS</abbr> 、<abbr title="Extensible Markup Language"> XML</abbr> 的标准就是由W3C来定制。W3C会员（大约500名会员）包括生产技术产品及服务的厂商、内容供应商、团体用户、研究实验室、标准制定机构和政府部门，一起协同工作，致力在万维网发展方向上达成共识。</p>
<input type="button" value="按钮" title="点击我你就杯具啦" /></div>
</body>
</html>
突发奇想的一个jquery插件(2)
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