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js solves movebox movement problem_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:07:491441browse

This article shares with you the js solution to the movebox movement problem and the related operations of canceling the default drag event of the image for your reference. The specific content is as follows

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>

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"; 
};

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; 
}

The above is the entire content of this article, I hope it will be helpful to everyone’s study.

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