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网页版的计算器，支持键盘输入，支持删除，按键发亮

来源：互联网发布：安卓软件限速编辑：程序博客网时间：2024/06/03 00:43

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

<meta content="text/html; charset=utf-8"/>
<script type="text/javascript" src="jquery-1.8.0.min.js"></script>

<title>网页计算器</title>

<style id="jsbin-css">

body{

   text-align:center;
}
#caculator{
   width:325px;
   margin:50px auto;
   background-color:#9AD1EA;
}
.print{
   width:301px;
   background:#999;
   text-align:right;
   margin:0 5px 10px 8px;
   box-shadow:inset 0 4px 5px #333;
   min-height:40px;
   word-wrap:break-word;
   word-break:break-all;
   height:auto;
}

.add{
   height :90px;
   float:right;
   margin-right:13px;
   line-height:90px;
}
#zero{
   width:146px;
}

span{
   width:66px;
   height:40px;
   background:#eee;
   margin:0 5px 10px 8px;
   text-align:center;
   line-height:40px;
   float:left;
   box-shadow:0 5px 1px #999;
   cursor:pointer;
   border-radius:3px;
}

span:hover{
   background:#87cefa;
   box-shadow:0 5px 1px #1e90ff;
   color:#fff;
}
.hover{
   background:#87cefa;
   box-shadow:0 5px 1px #1e90ff;
   color:#fff;
}
.bottomText{
   text-align:left;
}

</style>
</head>
   <body>
       <div id="caculator">
           <span class="print"></span>
           <span class="clear">C</span> <span class="fn" id="chu">/</span> <span class="fn" id="cheng">*</span> <span class="fn" id="jian">-</span>
           <span class="number">7</span><span class="number">8</span><span class="number">9</span><span class="fn add" id="jia">+</span>
           <span class="number">4</span><span class="number">5</span><span class="number">6</span>
           <span class="number">1</span><span class="number">2</span><span class="number">3</span><span class="add" id="confirm">确定</span>
           <span class="number" id="zero">0</span><span class="number" id="point">.</span>
           <div class="bottomText">此计算器支持使用键盘输入数字以及计算符号、支持backspace删除输入的最后一个字符、回车键清除所有输入</div>
       </div>


   </body>

<script>
var lastIsFn = true;//标记，用来标记最后一个字符是否是运算符，如果是运算符则不允许往后面直接添加运算符
$(document).ready(function(){
   //号码的点击
   $(".number").click(function(){
       var content = $(".print").html();
       if($(this).attr("id") == "point"){//点号
           if(content.indexOf(".") >= 0){
               return ;
           }
           printCaculate(".",true);
           lastIsFn = true;
           return ;
       }
       $(".print").html(content+$(this).html());
       lastIsFn = false;
   });

   $(".fn").click(function(){//运算符的点击
       var content = $(".print").html();
       if(lastIsFn){//上一个是符号
           return ;
       }
       printCaculate($(this).html(),true);
       lastIsFn = true;
   });

   $("#confirm").click(function(){//等号的点击
       var content = $(".print").html();
       printCaculate(eval(content),false);
   });

   $(".clear").click(function(){
       $(".print").html("");
   });

   //添加内容，参数;1.需要添加的内容2.是否在原内容后添加
   function printCaculate(content,isAddToEnd){
       var oldcontent = $(".print").html();
       if(isAddToEnd){
           $(".print").html(oldcontent+content);
       }else{
           $(".print").html(content);
       }
   }
});

//键盘监听
   $(window).keydown(function(event){
       var number = event.keyCode - 48;
       if(0 <= number <= 9){
           $(".number:contains('"+number+"')").trigger("click");
           lightTheKey($(".number:contains('"+number+"')"));
       }
       number = event.keyCode - 96;
       if(0 <= number <= 9){
           $(".number:contains('"+number+"')").trigger("click");
           lightTheKey($(".number:contains('"+number+"')"));
       }
      switch(event.keyCode) {
       case 32:{
           $(".clear").trigger("click");
           lightTheKey($(".clear"));
           break;
       }
       case 61:{
           if(event.shiftKey){
               $("#jia").trigger("click");
               lightTheKey($("#jia"));
               break;
           }else{
               $("#jian").trigger("click");
               lightTheKey($("#jian"));
               break;
           }
       }
       case 53:{
           if(event.shiftKey){
               $("#chu").trigger("click");
               lightTheKey($("#chu"));
           }
           break;
       }
       case 173:{
           $("#jian").trigger("click");
           lightTheKey($("#jian"));
           break;
       }
       case 56:{
           if(event.shiftKey){
               $("#cheng").trigger("click");
               lightTheKey($("#cheng"));
           }
           break;
       }
       case 106 :{
           $("#cheng").trigger("click");
           lightTheKey($("#cheng"));
           break;
       }
       case 107 :{
           $("#jia").trigger("click");
           lightTheKey($("#jia"));
           break;
       }
       case 13 :{
           $("#confirm").trigger("click");
           lightTheKey($("#confirm"));
           break;
       }
       case 109 :{
           $("#jian").trigger("click");
           lightTheKey($("#jian"));
           break;
       }
       case 110 :{
           $(".number:contains('.')").trigger("click");
           lightTheKey($(".number:contains('.')"));
           break;
       }
       case 111 :{
           $("#chu").trigger("click");
           lightTheKey($("#chu"));
           break;
       }
       case 8 :{
           deleteLast();
           break;
       }
      }
   });

   //删除最后一个字符
   function deleteLast(){
       var content = $(".print").html();
       var last = content.charAt(content.length-1);
       if(last =="+" ||
           last =="-" ||
           last =="*" ||
           last =="/" ||
           last =="."
       ){
           lastIsFn = false;
       }
       $(".print").html(content.substr(0,content.length-1));
   }
   //按下按键式对应的span发亮
   function lightTheKey(e){
       $(e).addClass("hover");
       setTimeout(function(){
           $(e).removeClass("hover");
       },90);
   }
</script>

</html>

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