背景:近期项目中需要实现弹出浮层增加数据,并且浮动层可以拖拽
解决步骤:1、浮动层实现 2、拖拽实现
多方查资料,基本实现功能,现做demo,便于以后使用
先上图片大体展示实现效果:
再上代码,展示我的实现思路:
DragAndDrop.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>浮动层拖拽</title>
<script src="DragDiv.js" type="text/javascript" language="javascript"
charset="UTF-8"></script>
<link href="UploadFile.css" rel="stylesheet" type="text/css" /> <script type="text/javascript">
function openFuCeng() {
document.getElementById("moveFile").style.display = "block";
document.getElementById("shadow2").style.display = "block"; }
function closeDiv() {
document.getElementById("moveFile").style.display = "none";
document.getElementById("shadow2").style.display = "none"; }
</script>
</head>
<body>
<div id="dragAndDrop">
<!-- 浮层开始 -->
<div id="moveFile" class="moveFile">
<div class="toolbarHeight" onmousedown="down('moveFile')">
<label>鼠标拖拽可移动</label>
</div>
<div style="width:100%;height:85px; ">
<p>浮动层</p>
</div>
<div class="fucengDiv" >
<input class="toobarBtn" type="button" value="关闭" onclick="javascript:closeDiv()"/>
</div>
</div>
<div id="shadow2"></div>
<!-- 浮层结束 -->
<div></div>
<input type="button" value="点击展示浮层" onclick="javascript:openFuCeng()" style="margin-top: 20px;">
<p>底层页面</p>
</div>
</body>
</html>
DragDiv.js
/**
* 浮层拖拽
*/
var px = 0;
var py = 0;
var begin = false;
//是否要开启透明效果
var enableOpacity = false; // 默认不允许
var myDragDiv;
/**
* 浮层拖拽
* @param divid 待拖拽对象id
*/
function down(divid) {
myDragDiv=document.getElementById(divid);//获得被拖拽对象
begin = true;
myDragDiv.style.cursor = "hand";
event.srcElement.setCapture();
px = myDragDiv.style.pixelLeft - event.x;//pixelLeft
py = myDragDiv.style.pixelTop - event.y;
} document.onmousemove=function() {
if (myDragDiv != null && typeof (myDragDiv) != "undefined") {
if (begin&&(px + event.x)>10) {
if (enableOpacity) { myDragDiv.style.filter = "Alpha(opacity=30)"; } // 滤镜
myDragDiv.style.pixelLeft = px + event.x;
myDragDiv.style.pixelTop = py + event.y;
}
}
} document.onmouseup=function() {
if (myDragDiv != null && typeof (myDragDiv) != "undefined") {
begin = false;
if (enableOpacity) { myDragDiv.style.filter = "Alpha(opacity=100)"; } // 滤镜
myDragDiv.style.cursor = "default";
event.srcElement.releaseCapture();
myDragDiv = null;
}
}
UploadFile.css
@CHARSET "UTF-8";
#dragAndDrop{
margin: 0 auto;
width: 300px;
height: 200px;
margin-top:200px;
text-align:center;
background:#98fb98 ;
border: 2px solid black;
}
/*文件整体大小*/
#shadow2{
display: none;
background:white;
opacity:0.2;
filter:alpha(opacity=20);
position:absolute;
left:0px;
top:0px;
width:100%;
height:100%;
z-index:996;/*z-index position display 共同实现层的浮动 */
margin: 0 auto;
}
/*移动浮层*/
.moveFile{
display: none;
width: 150px;
height: 160px;
position: absolute;
z-index:997;
border: 2px solid black;
background:#FFF;
top:50%;
margin-top:-50px;
left:50%;
margin-left:-50px;
}
.toolbarHeight{
height: 25px;
width: 100%;
border-bottom:#b7e3f2 1px solid;
background:#98fb98 ;
}
.toobarBtn{
float: right;
margin-right: 10px;
} .fucengDiv{
width:100%;
height: 30px;
padding-top: 5px;
border-top:#b7e3f2 1px solid;
}
注:拖拽的实现是在网上查资料找到的,做了一些小的改动,大意了忘记留下学习地址了
以上使用到的代码,看着还是比较简单的,但是你理解吗?至少我还是有问题的
问题:
首次拖拽总是不灵活,需要多晃动几次鼠标才有效,为什么呢?待解决