Pelajari kemahiran JavaScript respons tetikus events

Pelajari kemahiran JavaScript respons tetikus events_javascript

WBOY

Lepaskan： 2016-05-16 15:23:41

asal

1397 orang telah melayarinya

Artikel ini berkongsi kes simulasi tetikus ringkas untuk rujukan anda Kandungan pelaksanaan khusus adalah seperti berikut
Cara melaksanakan acara tetikus tangkapan Apabila tetikus meluncur, dapatkan koordinat tetikus semasa, dan kemudian ikat anjakan tangkapan dalam kawasan lutsinar, supaya model gelongsor tetikus boleh dilaksanakan dalam kawasan lutsinar yang disimulasikan.

Rendering:

Kod HTML:

<!DOCTYPE html>
<html >
 <head>
 <meta charset="UTF-8">
 <title> the mouse </title>
 <link rel="stylesheet" href="css/new.css">
 </head>
 <body>
 <div class="main">
 <div class="content">
 <div class="content-nav-top">
  <span onclick = 'koringz.createclick1(0)'>默认</span>
  <span onclick = 'koringz.createclick1(50)'>圆</span>
 </div>
 <div class="content-nav-left">
  <span onclick = 'koringz.createclick2 (0.25) '>0.25</span>
  <span onclick = 'koringz.createclick2 (0.5) '>0.5</span>
  <span onclick = 'koringz.createclick2 (0.75)'>0.75</span>
  <span onclick = 'koringz.createclick2 (1) '>1</span>
 </div>
 <div class="box">鼠标感应器(the mouse sensor)</div>
 <div class="block">
  <div class='block_case'></div>
 </div>
 </div>
 </div>
 <script type="text/javascript" src="js/demo.min/demo.min.js"></script>
 </body>
</html>

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Kod CSS:

* {
 margin: 0;
 padding: 0;
 box-sizing: border-box;
}
body {
 position: absolute;
 text-align: center;
 height: 100%;
 width: 100%;
}
.main{
 position: relative;
 margin: 0 auto;
 height: 100%;
 background-color: rgb(48, 70, 82)
}
.main .content{
 position:absolute;
 display: inline-block;
 top:50%;
 left:50%;
 margin-left: -300px;
 margin-top: -150px;
 width: 600px;
 height: 300px;
 line-height: 300px;
 /*overflow: hidden;*/
 background: radial-gradient(ellipse farthest-corner, rgb(115, 176, 198) 0%, #888 100%);
 background: -webkit-radial-gradient(ellipse farthest-corner, rgb(115, 176, 198) 0%, #888 100%);
 box-shadow: 2px 3px 8px rgba(67, 50, 124 ,.6),0px 0px 8px rgba(67, 50, 124 ,.6);
}
.main .content .content-nav-top{
 display: none;
 position: absolute;
 margin-top: -50px;
 height: 50px;
 width: 300px; 
}
.main .content .content-nav-top >span{
 display: block;
 float: left;
 font-size: 16px;
 font-weight: normal;
 margin-right:1px;
 width: 50px;
 height: 50px; 
 line-height: 50px; 
 background-color: rgba(251, 214, 146,.3); 
 box-shadow: 0px 4px 13px rgb(222,222,222,1);
 cursor: pointer;
}
.main .content .content-nav-top >span:nth-child(1){
 border-radius:0 ; 
}
.main .content .content-nav-top >span:nth-child(2){
 border-radius:50% ; 
}
.main .content .content-nav-top >span:nth-child(3){
 border-radius:0; 
}
.main .content .content-nav-top >span:nth-child(4){
 border-radius: 50% ; 
}
.main .content .content-nav-left{
 display: none;
 position: absolute;
 margin-left: -50px;
 width: 50px;
 height: 300px; 
}
.main .content .content-nav-left >span{
 display: block;
 font-size: 16px;
 font-weight: normal;
 margin-bottom:1px;
 width: 50px;
 height: 50px; 
 line-height: 50px; 
 background-color: rgb(85, 145, 140); 
 box-shadow: 0px 4px 13px rgb(222,222,222,1);
 border-radius:50% 0 0 50% ; 
 cursor: pointer;
}
.box{
 position: relative;
 float: left;
 width: 49.9%;
 height: 100%;
 border-right-style: solid;
 border-right-width: 1px;
 border-right-color: rgba(211,211,211,.5);
 color:rgb(99, 84, 168);
 text-shadow: 0px 1px 0px #888,1px 0px 0px #888,0px 0px 1px #888;
 }
.block{
 float: right;
 width: 50%;
 height: 100%;
}

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Kod JS:

var koringz = (function(){ 
 var x,
 y,
 getmain,
 getcontent,
 getbox,
 getblock,
 getblock_case,
 getnav_top,
 block_case_margin_top,
 block_case_margin_left,
 block_casetostring1,
 block_casetostring2,
 block_casesubstring1,
 block_casesubstring2,
 istouch;
 getmain = document.querySelector('.main');
 getcontent = getmain.querySelector('.content');
 getbox = getcontent.querySelector('.box');
 getblock = getcontent.querySelector('.block');
 getblock_case = getblock.querySelector('.block_case');
 getnav_top = getcontent.querySelector('.content-nav-top');
 getnav_left = getcontent.querySelector('.content-nav-left');
 function get_box() {
 w_getbox_distance = getbox.offsetWidth;
 h_getbox_distance = getbox.offsetHeight;
 istouch = 'ontouchstart' in window;
 getbox.addEventListener(istouch&#63;'touchmove':'mousemove',mouseevent,false);
 getbox.addEventListener(istouch&#63;'touchmove':'mousemove',nav,false)
 }
 function nav () {
 return new_nav();
 }
 var new_nav = function () {
 getnav_top.style.display = 'block';
 getnav_left.style.display = 'block';
 }
 function move_box() {
 getblock_case.style.width = '0px';
 getblock_case.style.height = '0px';
 block_case_margin_left = getblock_case.style.marginLeft = getblock.offsetWidth/2 + 'px';//子节点
 block_case_margin_top = getblock_case.style.marginTop = getblock.offsetHeight/2 + 'px';
 block_casetostring1 = block_case_margin_left.toString();//值转化为字符串
 block_casetostring2 = block_case_margin_top.toString();
 block_casesubstring1 = block_casetostring1.substring(0,3);
 block_casesubstring2 = block_casetostring2.substring(0,3); 
 }
 var mouseevent = function () {
 mouseEvent(event);
 }
 function mouseEvent(e){
 var zore = 0,
  val = 1;
 if(istouch){
  x = e.touches[zore].pageX;
  y = e.touches[zore].pageY;
  e.preventDefault();
 }
 else if(!istouch){
  x = w_getbox_distance/2 != undefined &#63; e.offsetX:e.layerX;
  y = h_getbox_distance/2 != undefined &#63; e.offsetY:e.layerY;
 } 
 if(val = true){
  getblock_case.style.width = x + 'px';//获得了mouse划过的位置
  getblock_case.style.height = y + 'px';
  getblock_case.style.marginLeft = (block_casesubstring1-x/2) +'px';
  getblock_case.style.marginTop = (block_casesubstring2-y/2) +'px';
  getblock_case.style.backgroundColor = "rgba(147, 106, 77,1)";
 }
 }
 (function (){
  window.onload = function(){
  move_box();
  get_box()
  }
 })()
 var click =function () {
 this.borderradius = function(num) {
  if(typeof num == 'number'){
  if(num == 0){
   getblock_case.style.borderRadius = num;
  }
  else if(num > 0){
   getblock_case.style.borderRadius = num +'%';
  }
  else{
   return false;
  }
  }
 }
 this.opacitas = function (num) {
  if(typeof num == 'number'){
  getblock_case.style.opacity = num;
  }
  else{
  return false;
  }
 }
 }
 var Click = new click();
 return {
 createclick1 :Click.borderradius,
 createclick2 :Click.opacitas
 }
})()

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Anak panah tetikus di sini juga boleh digantikan dengan ikon kegemaran anda Warna kawasan tetikus yang disimulasikan juga boleh ditukar secara bebas Kesan kawasan simulasi juga boleh dititik, linear, animasi, dll. Kebebasan ini .
Di atas ialah pengenalan terperinci kepada acara respons tetikus JavaScript Saya harap ia akan membantu pembelajaran semua orang.