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拖拽多个对象到盒子内

2016-05-19 00:00 211 查看

<!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=utf-8" />
<title>无标题文档</title>
<script src="js/jquery-1.8.3.js" type="text/javascript"></script>

<script type="text/javascript">
$(document).ready(function(){

//////first点下时
objdrag($(".first"))

//////second点下时
objdrag($(".second"))

//////thirdly点下时
objdrag($(".thirdly"))

//////over///
})

//碰撞检测
function lengthn(obj_one,obj_place){

var objone = obj_one.offset();
var objone_l = objone.left;
var objone_t = objone.top;
var objone_r = objone_l + obj_one.width()
var objone_b = objone_t + obj_one.height()

var objtwo = obj_place.offset();
var objtwo_l = objtwo.left;
var objtwo_t = objtwo.top;
var objtwo_r = objtwo_l + obj_place.width()
var objtwo_b = objtwo_t + obj_place.height()
//console.log(objone_r +"|"+ objtwo_l)
if( objone_r-objtwo_l > 0 && objone_t-objtwo_b<0 && objone_l-objtwo_r<0 && objone_b-objtwo_t>0){
return true;
}
}

/*
$(".first").css("top",o_top)

$(".second").css("top",o_top)

$(".thirdly").css("top",o_top)
*/

function objdrag(objdrag){
//
//////first点下时
objdrag.mousedown(function(ev){

objdrag.css("position","absolute")

ev = ev || window.event;

var objall = $(".divall").offset();
var objall_l = objall.left - ev.pageX;
var objall_t = objall.top - ev.pageY;
var obj = objdrag.offset();
var obj_l = ev.pageX -obj.left;
var obj_t = ev.pageY -obj.top;

//console.log(objall.left)
$(document).mousemove(function(e){

objdrag.css("left", e.pageX - objall.left - obj_l)
objdrag.css("top", e.pageY - objall.top - obj_t)
//console.log(e.pageX +"|"+ objall.left +"|"+ (e.pageX - objall.left))
//碰撞对象
if(lengthn(objdrag,$(".divall"))){
objdrag.css("opacity","0.5")
$(".divall").addClass("divb")
}else{
objdrag.css("opacity","1")
$(".divall").removeClass("divb")
}

})

})
//////first抬起时
objdrag.mouseup(function(){
$(document).unbind();

//碰撞对象
//在范围对象碰撞了
if(lengthn(objdrag,$(".divall"))){

objdrag.css("position","")
objdrag.css("top","auto").css("left",0).css("opacity","1");
$(".divall").removeClass("divb")

}else{

objdrag.css("position","absolute")

}

})

//
}

</script>
<style type="text/css">
body{margin:0;padding:0;}
ul,li{margin:0;padding:0;list-style-type:none;}
.divall{width:200px;height:500px;background:#eee;position:absolute;right:10px;top:10px;}
.divb{border:3px solid #1bd566;background:#FFF;right:7px;top:7px;}
.first{width:200px;height:120px;background:red;z-index:2;top:0;cursor:pointer;}
.second{width:200px;height:150px;background:green;}
.thirdly{width:200px;height:180px;background:#1b88d5;}
</style>
</head>

<body>

<div class="divall">
<div class="drag first"></div>
<div class="drag second"></div>
<div class="drag thirdly"></div>

</div>

</body>
</html>

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