jQuery动态添加可拖动元素完整实例(附demo源码下载)

本文实例讲述了jQuery动态添加可拖动元素的方法。分享给大家供大家参考，具体如下：

运行效果截图如下：

具体代码如下：

index.html：

rush:xhtml;"> <Meta http-equiv="Content-Type" content="text/html; charset=utf-8">

添加节点" hidefocus = "true" id = "addItem"/>

ProcessDesigner.css:

rush: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:

rush: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("

") } 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; }; }

完整实例代码点击此处。

更多关于jQuery相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》、《》、《》、《》及《用法总结》

希望本文所述对大家jQuery程序设计有所帮助。