本文實例講述了jQuery動態添加可拖動元素的方法。分享給大家供大家參考，具體如下：
運行效果截圖如下：
具體代碼如下：
index.html：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>流程設計器</title><script type = "text/javascript" src = "jquery-1.7.2.min.js"> </script><script type = "text/javascript" src="drag.js"></script><link type = "text/css" href = "ProcessDesigner.css" rel="stylesheet"></link></head><body> <div id = "console"> <div id = "menubar"> <input type = "button" value = "添加節點" hidefocus = "true" id = "addItem"/> </div> <div id = "nodesContainer"></div> </div></body></html>
ProcessDesigner.css:
body { padding:0; margin:0}#console{ width:500px; height:300px; background:#eee; margin:10px auto; border:5px solid #000;}#menubar{ width:100%; height:30px; background:#333; line-height:30px; vertical-align:middle;}#addItem{ wdith:50px; height:20px; color:#fff; background:#555; border:0; line-height:20px; margin-left:5px; border-radius:5px; _margin-top:4px;}#nodesContainer{ width:100%; height:270px; background:#eee;}drag.js:
/** * @author Administrator */$(function(){ $("#addItem").click(function(){ var obj = document.getElementById("nodesContainer"); createNode(obj); })})function createNode(parentNode){ var left = document.getElementById("nodesContainer").offsetLeft+10; var top = document.getElementById("nodesContainer").offsetTop+10; var newNode = document.createElement("div"); newNode.style.position = "absolute"; newNode.style.width = "20px"; newNode.style.height = "20px"; newNode.style.top = top+"px"; newNode.style.left = left+"px"; newNode.style.borderRadius = "50px"; newNode.style.background = "blue"; parentNode.appendChild(newNode); doDrag(newNode);}/* * @param {Object} obj: If obj is a string,convert it to an obj; * @param {number} initWidth: Initial Width of obj; * @param {number} initHeight:Initial Height of obj; * @param {number} initLeft:Initial Left of obj; * @param {number} initTop:Initial Top of obj; */function doDrag(obj, initWidth, initHeight, initLeft, initTop){ var posX; var posY; var dragable; if (typeof obj == "string") obj = document.getElementById(obj); if(initWidth)obj.style.width = initWidth + "px"; if(initHeight)obj.style.height = initHeight + "px"; if(initLeft)obj.style.left = initLeft + "px"; if(initTop)obj.style.top = initTop + "px"; obj.onmousedown = function(event){ down(event); } obj.onmouseup = function(){ up(); } function down(e){ e = e || window.event; posX = e.clientX - obj.offsetLeft; //offsetLeft is a readonly property posY = e.clientY - obj.offsetTop; dragable = true; document.onmousemove = move; //$(obj).wrap("<div style = 'position:relative;border:1px solid red;width:300px;height:50px'></div>") } function move(ev){ if (dragable) { ev = ev || window.event;//如果是IE obj.style.left = (ev.clientX - posX) + "px"; obj.style.top = (ev.clientY - posY) + "px"; } } function up(){ //$(obj).unwrap(); dragable = false; };}完整實例代碼點擊此處本站下載。
更多關于jQuery相關內容感興趣的讀者可查看本站專題：《jQuery拖拽特效與技巧總結》、《jQuery表格(table)操作技巧匯總》、《jQuery常用插件及用法總結》、《jquery中Ajax用法總結》、《jQuery擴展技巧總結》、《jQuery常見經典特效匯總》、《jQuery動畫與特效用法總結》及《jquery選擇器用法總結》
希望本文所述對大家jQuery程序設計有所幫助。
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