javascript实现行拖动的方法

2019-11-20 12:24:09

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本文实例讲述了javascript实现行拖动的方法。分享给大家供大家参考。具体如下：

<!doctype html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>行拖动</title><script> window.onload = function(){ //绑定事件 var addEvent = document.addEventListener ? function(el,type,callback){  el.addEventListener( type, callback, !1 ); } : function(el,type,callback){  el.attachEvent( "on" + type, callback ); } //判定对样式的支持 var getStyleName= (function(){  var prefixes = ['', '-ms-','-moz-', '-webkit-', '-khtml-', '-o-'];  var reg_cap = /-([a-z])/g;  function getStyleName(css, el) {  el = el || document.documentElement;  var style = el.style,test;  for (var i=0, l=prefixes.length; i < l; i++) {  test = (prefixes[i] + css).replace(reg_cap,function($0,$1){  return $1.toUpperCase();  });  if(test in style){  return test;  }  }  return null;  }  return getStyleName; })(); var userSelect = getStyleName("user-select"); //精确获取样式 var getStyle = document.defaultView ? function(el,style){  return document.defaultView.getComputedStyle(el, null).getPropertyValue(style) } : function(el,style){  style = style.replace(//-(/w)/g, function($, $1){  return $1.toUpperCase();  });  return el.currentStyle[style]; } var dragManager = {  y:0,  dragStart:function(e){  e = e || event;  var handler = e.target || e.srcElement;  if(handler.nodeName === "TD"){  handler = handler.parentNode;  dragManager.handler = handler;  if(!handler.getAttribute("data-background")){  handler.setAttribute("data-background",getStyle(handler,"background-color"))  }  //显示为可移动的状态  handler.style.backgroundColor = "#ccc";  handler.style.cursor = "move";  dragManager.y = e.clientY;  if(typeof userSelect === "string"){  return document.documentElement.style[userSelect] = "none";  }  document.unselectable = "on";  document.onselectstart = function(){  return false;  }  }  },  draging:function(e){//mousemove时拖动行  var handler = dragManager.handler;  if(handler){  e = e || event;  var y = e.clientY;  var down = y > dragManager.y;//是否向下移动  var tr = document.elementFromPoint(e.clientX,e.clientY);  if(tr && tr.nodeName == "TD"){  tr = tr.parentNode  dragManager.y = y;  if( handler !== tr){   tr.parentNode.insertBefore(handler, (down ? tr.nextSibling : tr));  }  };  }  },  dragEnd:function(){  var handler = dragManager.handler  if (handler) {  handler.style.backgroundColor = handler.getAttribute("data-background");  handler.style.cursor = "default";  dragManager.handler = null;  }  if(typeof userSelect === "string"){  return document.documentElement.style[userSelect] = "text";  }  document.unselectable = "off";  document.onselectstart = null;  },  main:function(el){  addEvent(el,"mousedown",dragManager.dragStart);  addEvent(document,"mousemove",dragManager.draging);  addEvent(document,"mouseup",dragManager.dragEnd);  } } var el = document.getElementById("table"); dragManager.main(el); }</script><style>.table{width:60%;border: 1px solid red;border-collapse: collapse;}.table td{border: 1px solid red;height: 20px;}</style></head><body><h1>行拖动</h1><table id="table" class="table"><tbody><tr><td>1</td><td>One</td><td>dom.require</td></tr><tr id="2" ><td class="2">2</td><td>Two</td><td>ControlJS </td></tr><tr id="3" ><td class="3">3</td><td>Three</td><td>HeadJS</td></tr><tr id="4" ><td class="4">4</td><td>Four</td><td>LAB.js</td></tr><tr id="5" ><td class="5">5</td><td>Five</td><td>$script.js</td></tr><tr id="6" ><td class="6">6</td><td>Six</td><td>NBL.js</td></tr></tbody></table></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

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