jQuery实现的鼠标拖动画矩形框示例【可兼容IE8】
程序员文章站
2023-08-16 09:36:27
本文实例讲述了jquery实现的鼠标拖动画矩形框。分享给大家供大家参考，具体如下：
本文实例讲述了jquery实现的鼠标拖动画矩形框。分享给大家供大家参考，具体如下：
<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en"
"http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh" lang="zh">
<head>
<title>鼠标拖动画矩形</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<style type="text/css">
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td {margin: 0;padding: 0}
html {color: #000;overflow-y: scoll;overflow: -moz-scrollbars-vertical}
#confirmingappraisal {
position: relative;
left: 0;
top: 0;
margin: 0 auto;
padding: 0;
width: 800px;
min-height: 800px;
overflow: auto;
height: 1000px;
background-color: #e9e9e9;
}
.dashed-box {position: absolute;z-index: 9997; border: 1px dashed red; width: 0px; height: 0px;left: 0px; top: 0px; overflow: hidden;}
#moving_box {background-color: #0a90db;}
.question-box {
position: absolute;
z-index: 9998;
/*background: red;*/
/* older safari/chrome browsers */
-webkit-opacity: 0.8;
/* netscape and older than firefox 0.9 */
-moz-opacity: 0.8;
/* safari 1.x (pre webkit!) 老式khtml内核的safari浏览器*/
-khtml-opacity: 0.8;
/* ie9 + etc...modern browsers */
opacity: .8;
/* ie 4-9 */
filter: alpha(opacity=80);
/*this works in ie 8 & 9 too*/
-ms-filter: "progid:dximagetransform.microsoft.alpha(opacity=80)";
/*ie4-ie9*/
filter: progid:dximagetransform.microsoft.alpha(opacity=80);
}
.question-border {z-index: 9999;border: 2px dashed red;overflow: hidden; }
.del-box {
width: 17px;
height: 17px;
float: right;
position: relative;
margin-top: 1px;
margin-right: 1px;
z-index: 99999999999;
background: url(del.png);
}
</style>
<script language="javascript">
window.onload = function() {
function stopdefault(e) {
if(e && e.preventdefault)
e.preventdefault();
else
window.event.returnvalue = false;
return false;
}
function obox() {
var wid = "w";
var index = 0;
var target = null;
var startx = 0, starty = 0;
var flag = false;
var startl = 0, startt = 0, boxheight = 0, boxwidth = 0;
var boxobj = document.getelementbyid("confirmingappraisal");
var frame = $("#confirmingappraisal");
var referencesize = {
"pos": frame.offset(),
"width": frame.outerwidth(),
"height": frame.outerheight()
}
var newmarkpos = {
"left": startl,////按下时鼠标距离的左边的距离
"top": startt////按下时鼠标距离的上边的距离
}
//鼠标点击
boxobj.onmousedown = function(e) {
flag = true;
var e = window.event || e;
target = e.target || e.srcelement; //获取document 对象的引用
//e.pagey，e.pagex兼容
if(target.src) {
stopdefault(e)
}
var scrolltop = boxobj.scrolltop;
var scrollleft = boxobj.scrollleft;
var epagex = e.clientx + scrollleft;
var epagey = e.clienty + scrolltop;
//按下时鼠标距离页面的距离
startx = epagex;
starty = epagey;
//按下时鼠标距离的左边和上边的距离
startl = startx - referencesize.pos.left;
startt = starty - referencesize.pos.top;
index++;
// 如果鼠标在 box 上被按下
if(target.classname.match(/del-box/i)) {
// 允许拖动
flag = false;
// 设置当前 box 的 id 为 moving_box
var movingbox = document.getelementbyid("moving_box")
if(movingbox !== null) {
movingbox.removeattribute("id");
}
target.id = "moving_box";
removebox(target);
} else {
var div = document.createelement("div");
div.id = wid + index;
div.classname = "dashed-box";
boxobj.appendchild(div);
div = null;
}
}
//鼠标离开
boxobj.onmouseup = function(e) {
var e = window.event || e;
if(boxwidth >= 1 || boxheight >= 1) {
boxobj.removechild(dragbox(wid + index));
index++;
var div = document.createelement("div");
var spanobj = document.createelement("span");
spanobj.classname = 'del-box';
div.appendchild(spanobj);
div.classname = "question-box question-border";
div.style.left = newmarkpos.left + "px";
div.style.top = newmarkpos.top + "px";
div.style.width = boxwidth + "px";
div.style.height = boxheight + "px";
boxobj.appendchild(div);
div = null;
boxwidth = 0;
boxheight = 0;
} else {
if(flag) {
boxobj.removechild(dragbox(wid + index));
}
}
flag = false;
}
//鼠标移动
boxobj.onmousemove = function(e) {
var e = window.event || e;
stopdefault(e)
if(flag) {
var scrolltop = boxobj.scrolltop;
var scrollleft = boxobj.scrollleft;
var epx = e.clientx + scrollleft;
var epy = e.clienty + scrolltop;
var disw = epx - startx;
var dish = epy - starty;
var l = startl + disw;
var t = startt + dish;
if(disw > 0) {
if(l >= 0) {
boxwidth = disw
}
newmarkpos.left = startl;
} else {
if(l <= 0) {
l = 0;
boxwidth = startl;
}
boxwidth = (startl - l);
newmarkpos.left = l;
}
if(dish > 0) {
if(t >= 0) {
boxheight = dish
}
newmarkpos.top = startt;
} else {
if(t <= 0) {
t = 0;
boxheight = startt;
}
boxheight = (startt - t)
newmarkpos.top = t;
}
dragbox(wid + index).style.left = newmarkpos.left + "px";
dragbox(wid + index).style.top = newmarkpos.top + "px";
dragbox(wid + index).style.width = math.abs(boxwidth) + "px";
dragbox(wid + index).style.height = math.abs(boxheight) + "px";
stopdefault(e)
}
}
var dragbox = function(id) {
return document.getelementbyid(id);
}
};
obox();
function removebox(obj) {
if(obj) {
var confirmingappraisal = document.getelementbyid('confirmingappraisal');
if(obj.classname == 'del-box') {
var objid = document.getelementbyid(obj.id);
confirmingappraisal.removechild(objid.parentnode);
} else {
alert(123)
}
}
};
}
</script>
</head>
<body style="overflow: hidden">
<div class="confirming-appraisal">
<div id="confirmingappraisal">
<img src="1.jpg" style="position: absolute;width: 1000px;height: 1600px;">
</div>
</div>
</body>
</html>
感兴趣的朋友可以使用如下工具测试上述代码运行效果：
在线html/css/javascript代码运行工具：
http://tools.jb51.net/code/htmljsrun
在线html/css/javascript前端代码调试运行工具：
http://tools.jb51.net/code/webcoderun
更多关于jquery相关内容还可查看本站专题：《jquery动画与特效用法总结》、《jquery切换特效与技巧总结》、《jquery扩展技巧总结》、《jquery常用插件及用法总结》、《jquery拖拽特效与技巧总结》、《jquery表格(table)操作技巧汇总》、《jquery常见经典特效汇总》及《jquery选择器用法总结》
希望本文所述对大家jquery程序设计有所帮助。
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