<!doctype html>
<html>
<head>
<title>行拖动 by 司徒正美</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 by 司徒正美</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>
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