js menyelesaikan pergerakan movebox problem_javascript kemahiran-tutorial js-php.cn

js menyelesaikan pergerakan movebox problem_javascript kemahiran

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Lepaskan： 2016-05-16 15:07:49

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Artikel ini berkongsi dengan anda penyelesaian js kepada masalah pergerakan kotak bergerak dan operasi yang berkaitan untuk membatalkan acara seret lalai imej untuk rujukan anda Kandungan khusus adalah seperti berikut

html:

<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 
  <link href="../Content/StyleSheet5.css" rel="stylesheet" /> 
  <script src="../Scripts/JavaScript5.js"></script> 
  <title></title> 
  <meta charset="utf-8" /> 
</head> 
<body> 
  <div id="center"> 
    <div id="black"></div> 
    <div id="movebox"> 
      <img id="moveimg" src="../Images/b.jpg"/> 
    </div> 
    <img id="bigimg" src="../Images/b.jpg" /> 
  </div> 
</body> 
</html>

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js:

var movebox; 
window.onload = function () { 
  movebox = document.getElementById("movebox"); 
  movebox.addEventListener("mousedown", function (e) { 
    if (e.button > 0) { 
      fun2(); 
      return false; 
    } 
    e.preventDefault && e.preventDefault(); //明哥：去掉图片拖动响应 狠重要 
    gen.x = e.clientX; 
    gen.y = e.clientY; 
    gen._x = movebox.offsetLeft; 
    gen._y = movebox.offsetTop; 
    gen.dx = gen.x - gen._x; 
    gen.dy = gen.y - gen._y; 
    document.addEventListener("mousemove",fun1,false); 
    document.addEventListener("mouseup", fun2, false); 
  }, false); 
}; 
var fun1 = function (e) { 
  gen.L = e.clientX - gen.dx; 
  gen.T = e.clientY - gen.dy; 
  var timefun = function () { 
    window.getSelection().removeAllRanges(); 
    if (gen.L < 100) 
      gen.L = 100; 
    else if (gen.L > 200) 
      gen.L = 200; 
    if (gen.T < 125) 
      gen.T = 125; 
    else if (gen.T > 175) 
      gen.T = 175; 
    setLT(movebox, gen.L, gen.T); 
  }; 
  setTimeout(timefun, 2); 
}; 
var fun2 = function () { 
  document.removeEventListener("mousemove", fun1, false); 
  document.removeEventListener("mouseuo", fun2, false); 
}; 
var gen = { 
  x: null, 
  y: null, 
  _x: null, 
  _y: null, 
  dx: null, 
  dy: null, 
  L: null, 
  T:null, 
}; 
var setLT = function (dom, L, T) { 
  dom.style.left = L + "px"; 
  dom.style.top = T + "px"; 
};

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css:

body { 
  position:absolute; 
  margin:0; 
  padding:0; 
} 
#center{ 
  position:absolute; 
  top:200px; 
  left:300px; 
  width:400px; 
  height:400px; 
  background-color:#808080; 
} 
#black{ 
  position:absolute; 
  width:400px; 
  height:400px; 
  z-index:80; 
  background-color:#000; 
  opacity:0.6; 
} 
#bigimg{ 
  z-index:50; 
  position:absolute; 
  left:100px; 
  top:125px; 
} 
#movebox{ 
  z-index:100; 
  position:absolute; 
  width:100px; 
  height:100px; 
  left:150px; 
  top:150px; 
  overflow:hidden; 
  cursor:move; 
  background-color:#ff6a00; 
} 
#moveimg{ 
  position:absolute; 
  left:-50px; 
  top:-25px; 
}

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