JavaScript实现鼠标拖拽效果
2015-11-24 00:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">
<html>
<head>
<title> 弹出层 </title>
<style type="text/css">
#container div {
margin-top: 6px;
}#select_city h3 {
float: left;
}#main_city, #all_province {
clear: both;
}#main_city div, #all_province div {
width: 588px;
clear: left;
}#main_city h4, #all_province h4 {
float: left;
display: inline;
font-size: 16px;
}#main_city div span, #all_province div span {
margin: 0 9px;
cursor: pointer;
font-size: 14px;
}#float_lay {
width: 220px;
height: 122px;
border: 1px #787878 solid;
position: absolute;
background: #fff;
z-index: 999;
display: none;
}
</style>
<script type="text/javascript">
//弹出层
function openLayer(objId, conId) {
var arrayPageSize = getPageSize();//调用getPageSize()函数
var arrayPageScroll = getPageScroll();//调用getPageScroll()函数
if (!document.getElementById("popupAddr")) {
//创建弹出内容层
var popupDiv = document.createElement("div");
//给这个元素设置属性与样式
popupDiv.setAttribute("id", "popupAddr")
popupDiv.style.position = "absolute";
popupDiv.style.border = "1px solid #ccc";
popupDiv.style.background = "#fff";
popupDiv.style.zIndex = 99;
//创建弹出背景层
var bodyBack = document.createElement("div");
bodyBack.setAttribute("id", "bodybg")
bodyBack.style.position = "absolute";
bodyBack.style.width = "100%";
bodyBack.style.height = document.documentElement.scrollHeight + "px";
bodyBack.style.zIndex = 98;
bodyBack.style.top = 0;
bodyBack.style.left = 0;
bodyBack.style.filter = "alpha(opacity=50)";
bodyBack.style.opacity = 0.5;
bodyBack.style.background = "#ddf";
//实现弹出(插入到目标元素之后)
var mybody = document.getElementById(objId);
insertAfter(popupDiv, mybody);//执行函数insertAfter()
insertAfter(bodyBack, mybody);//执行函数insertAfter()
}
//显示背景层
document.getElementById("bodybg").style.display = "";
//显示内容层
var popObj = document.getElementById("popupAddr")
popObj.innerHTML = document.getElementById(conId).innerHTML;
popObj.style.display = "";
//让弹出层在页面中垂直左右居中(统一)
// popObj.style.width = "600px";
// popObj.style.height = "400px";
// popObj.style.top = arrayPageScroll[1] + (arrayPageSize[3] - 35 - 400) / 2 + 'px';
// popObj.style.left = (arrayPageSize[0] - 20 - 600) / 2 + 'px';
//让弹出层在页面中垂直左右居中(个性)
var arrayConSize = getConSize(conId);
popObj.style.top = arrayPageScroll[1] + (arrayPageSize[3] - arrayConSize[1]) / 2 - 50 + 'px';
popObj.style.left = (arrayPageSize[0] - arrayConSize[0]) / 2 - 30 + 'px';
}
//获取内容层内容原始尺寸
function getConSize(conId) {
var conObj = document.getElementById(conId)
conObj.style.position = "absolute";
conObj.style.left = -1000 + "px";
conObj.style.display = "";
var arrayConSize = [conObj.offsetWidth, conObj.offsetHeight]
conObj.style.display = "none";
return arrayConSize;
}
function insertAfter(newElement, targetElement) {//插入
var parent = targetElement.parentNode;
if (parent.lastChild == targetElement) {
parent.appendChild(newElement);
} else {
parent.insertBefore(newElement, targetElement.nextSibling);
}
}
//获取滚动条的高度
function getPageScroll() {
var yScroll;
if (self.pageYOffset) {
yScroll = self.pageYOffset;
} else if (document.documentElement && document.documentElement.scrollTop) {
yScroll = document.documentElement.scrollTop;
} else if (document.body) {
yScroll = document.body.scrollTop;
}
arrayPageScroll = new Array('', yScroll)
return arrayPageScroll;
}
//获取页面实际大小
function getPageSize() {
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight) {
sScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else {
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight) {
windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) {
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) {
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
var pageWidth, pageHeight
if (yScroll < windowHeight) {
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
if (xScroll < windowWidth) {
pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight)
return arrayPageSize;
}
//关闭弹出层
function closeLayer() {
document.getElementById("popupAddr").style.display = "none";
document.getElementById("bodybg").style.display = "none";
return false;
}
</script>
<script type="text/javascript">
//对“拖动点”定义：onMousedown="StartDrag(this)" onMouseup="StopDrag(this)" onMousemove="Drag(this)"即可
var move = false, oldcolor, _X, _Y;
function StartDrag(obj) { //定义准备拖拽的函数
obj.setCapture(); //对当前对象的鼠标动作进行跟踪
oldcolor = obj.style.backgroundColor;
obj.style.background = "#999";
obj.style.cursor = "move";
move = true;
//获取鼠标相对内容层坐标
var parentwin = document.getElementById("popupAddr");
_X = parentwin.offsetLeft - event.clientX;
_Y = parentwin.offsetTop - event.clientY;
}
function Drag(obj) { //定义拖拽函数
if (move) {
var parentwin = document.getElementById("popupAddr");
parentwin.style.left = event.clientX + _X + "px";
parentwin.style.top = event.clientY + _Y + "px";
}
}
function StopDrag(obj) { //定义停止拖拽函数
obj.style.cursor = "default";
obj.style.background = oldcolor;
obj.releaseCapture(); //停止对当前对象的鼠标跟踪
move = false;
}
</script>
</head><body>
<input name="Input" id="openBtn" value="可拖动层" type="button" onclick="openLayer('openBtn','contentContainer')"/><div id="contentContainer" style="display:none">
<div id="tab3" style="width:360px;height:200px;background:#fee;">
<div id="tabtop3">
<div id="tabtop-L3" style="cursor:default;background:#DBDEDE" onMousedown="StartDrag(this);"
onMouseup="StopDrag(this);" onMousemove="Drag(this);">
<center><strong style="color:red;font-size:20px">填写内容</strong></center>
</div>
</div>
<div id="tabcontent3" style="padding:8px">
<center><br/><br/>
内容：<textarea name='_content' id='_content' cols='20' rows='10'
style='width:200px;height:70px;border:1px solid #CDCDCD;color:blue;'
onpropertychange='if(this.value.length>100){this.value=this.value.slice(0,100)}'></textarea>
</center>
</div>
<div id="tabtop-R" style="bottom:5px;">
<center><input type="button" value="确定" onclick="alert(document.getElementById('_content').value);"/>
<input type="button" value="取消" onclick="closeLayer();"/></center>
</div>
</div>
</div>
</body>
</html>
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