完美的js div拖拽实例代码
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了完美的js div拖拽实例代码，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含5435字，纯文字阅读大概需要8分钟。
内容图文
本文实例为大家分享了完美的js div拖拽实例代码，供大家参考，具体内容如下
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>拖拽库</title>
<style type="text/css">
div,h2,p{margin:0;padding:0;}
body{font:14px/1.5 arial;}
#box{width:100px;height:100px;background:#fef4eb;padding:5px;margin:50px;border:1px solid #f60;}
#box .title{height:25px;background:#f60;}
#tool{margin-bottom:10px;}
</style>
<script type="text/javascript">
function Drag()
{
//初始化
this.initialize.apply(this, arguments)
}
Drag.prototype = {
//初始化
initialize : function (drag, options)
{
this.drag = this.$(drag);
this._x = this._y = 0;
this._moveDrag = this.bind(this, this.moveDrag);
this._stopDrag = this.bind(this, this.stopDrag);
this.setOptions(options);
this.handle = this.$(this.options.handle);
this.maxContainer = this.$(this.options.maxContainer);
this.maxTop = Math.max(this.maxContainer.clientHeight, this.maxContainer.scrollHeight) - this.drag.offsetHeight;
this.maxLeft = Math.max(this.maxContainer.clientWidth, this.maxContainer.scrollWidth) - this.drag.offsetWidth;
this.limit = this.options.limit;
this.lockX = this.options.lockX;
this.lockY = this.options.lockY;
this.lock = this.options.lock;
this.onStart = this.options.onStart;
this.onMove = this.options.onMove;
this.onStop = this.options.onStop;
this.handle.style.cursor = "move";
this.changeLayout();
this.addHandler(this.handle, "mousedown", this.bind(this, this.startDrag))
},
changeLayout : function ()
{
this.drag.style.top = this.drag.offsetTop + "px";
this.drag.style.left = this.drag.offsetLeft + "px";
this.drag.style.position = "absolute";
this.drag.style.margin = "0"
},
startDrag : function (event)
{
var event = event || window.event;
this._x = event.clientX - this.drag.offsetLeft;
this._y = event.clientY - this.drag.offsetTop;
this.addHandler(document, "mousemove", this._moveDrag);
this.addHandler(document, "mouseup", this._stopDrag);
event.preventDefault && event.preventDefault();
this.handle.setCapture && this.handle.setCapture();
this.onStart()
},
moveDrag : function (event)
{
var event = event || window.event;
var iTop = event.clientY - this._y;
var iLeft = event.clientX - this._x;
if (this.lock) return;
this.limit && (iTop < 0 && (iTop = 0), iLeft < 0 && (iLeft = 0), iTop > this.maxTop && (iTop = this.maxTop), iLeft > this.maxLeft && (iLeft = this.maxLeft));
this.lockY || (this.drag.style.top = iTop + "px");
this.lockX || (this.drag.style.left = iLeft + "px");
event.preventDefault && event.preventDefault();
this.onMove()
},
stopDrag : function ()
{
this.removeHandler(document, "mousemove", this._moveDrag);
this.removeHandler(document, "mouseup", this._stopDrag);
this.handle.releaseCapture && this.handle.releaseCapture();
this.onStop()
},
//参数设置
setOptions : function (options)
{
this.options =
{
handle: this.drag, //事件对象
limit: true, //锁定范围
lock: false, //锁定位置
lockX: false, //锁定水平位置
lockY: false, //锁定垂直位置
maxContainer: document.documentElement || document.body, //指定限制容器
onStart: function () {}, //开始时回调函数
onMove: function () {}, //拖拽时回调函数
onStop: function () {} //停止时回调函数
};
for (var p in options) this.options[p] = options[p]
},
//获取id
$ : function (id)
{
return typeof id === "string" ? document.getElementById(id) : id
},
//添加绑定事件
addHandler : function (oElement, sEventType, fnHandler)
{
return oElement.addEventListener ? oElement.addEventListener(sEventType, fnHandler, false) : oElement.attachEvent("on" + sEventType, fnHandler)
},
//删除绑定事件
removeHandler : function (oElement, sEventType, fnHandler)
{
return oElement.removeEventListener ? oElement.removeEventListener(sEventType, fnHandler, false) : oElement.detachEvent("on" + sEventType, fnHandler)
},
//绑定事件到对象
bind : function (object, fnHandler)
{
return function ()
{
return fnHandler.apply(object, arguments)
}
}
};
//应用
window.onload = function ()
{
var oBox = document.getElementById("box");
var oTitle = oBox.getElementsByTagName("h2")[0];
var oSpan = document.getElementsByTagName("span")[0];
var oDrag = new Drag(oBox, {handle:oTitle, limit:false});
var aInput = document.getElementsByTagName("input");
//锁定范围接口
aInput[0].onclick = function ()
{
oDrag.limit = !oDrag.limit;
this.value = oDrag.limit ? "取消锁定范围" : "锁定范围"
};
//水平锁定接口
aInput[1].onclick = function ()
{
oDrag.lockX = !oDrag.lockX;
this.value = oDrag.lockX ? "取消水平锁定" : "水平锁定"
};
//垂直锁定接口
aInput[2].onclick = function ()
{
oDrag.lockY = !oDrag.lockY;
this.value = oDrag.lockY ? "取消垂直锁定" : "垂直锁定"
};
//锁定位置接口
aInput[3].onclick = function ()
{
oDrag.lock = !oDrag.lock;
this.value = oDrag.lock ? "取消锁定位置" : "锁定位置"
};
//开始拖拽时方法
oDrag.onStart = function ()
{
oSpan.innerHTML = "开始拖拽"
};
//开始拖拽时方法
oDrag.onMove = function ()
{
oSpan.innerHTML = "left:" + this.drag.offsetLeft + ", top:" + this.drag.offsetTop
};
//开始拖拽时方法
oDrag.onStop = function ()
{
oSpan.innerHTML = "结束拖拽"
};
};
</script>
</head>
<body>
<div id="tool">
<input type="button" value="锁定范围" />
<input type="button" value="水平锁定" />
<input type="button" value="垂直锁定" />
<input type="button" value="锁定位置" />
</div>
<p>拖放状态：<span>未开始</span></p>
<div id="box">
<h2 class="title"></h2>
</div>
</body>
</html>
</td>
</tr>
</table>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
内容总结
以上是互联网集市为您收集整理的完美的js div拖拽实例代码全部内容，希望文章能够帮你解决完美的js div拖拽实例代码所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。
来源：【匿名】