Complete example analysis of jQuery controlling Div drag and drop effect

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Complete example analysis of jQuery controlling Div drag and drop effect_jquery

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May 16, 2016 pm 04:04 PM

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The example in this article describes how jQuery controls the drag-and-drop effect of Div. Share it with everyone for your reference. The details are as follows:

<!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>
<style>
#Drigging {
width:200px;
background:#CCC;
border:solid 1px #666;
height:80px;
line-height:80px;
text-align:center;
position:absolute;
}
</style>
<script src="jquery-1.8.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){ 
var bool=false; //标识是否移动元素
var offsetX=0; //声明DIV在当前窗口的Left值
var offsetY=0; //声明DIV在当前窗口的Top值
$("#Drigging").mouseover(function(){
$(this).css('cursor','move');
//当鼠标移动到拖拽的DIV上的时候，将鼠标的样式设置为移动(move)
})
$("#Drigging").mousedown(function(){ 
 bool=true;
 //当鼠标在移动元素按下的时候将bool设定为true
 offsetX = event.offsetX;
 //获取鼠标在当前窗口的相对偏移位置的Left值并赋值给offsetX
  offsetY = event.offsetY;
  //获取鼠在当前窗口的相对偏移位置的Top值并赋值给offsetY
 $(this).css('cursor','move');
 }).mouseup(function(){
bool=false;
//当鼠标在移动元素起来的时候将bool设定为false
})
$(document).mousemove(function(){
if(!bool)//如果bool为false则返回
return;
//当bool为true的时候执行下面的代码
var x = event.clientX-offsetX;
//event.clientX得到鼠标相对于客户端正文区域的偏移
//然后减去offsetX即得到当前推拽元素相对于当前窗口的X值
//（减去鼠标刚开始拖动的时候在当前窗口的偏移X）
var y = event.clientY-offsetY;
//event.clientY得到鼠标相对于客户端正文区域的偏移
//然后减去offsetX即得到当前推拽元素相对于当前窗口的Y值
//（减去鼠标刚开始拖动的时候在当前窗口的偏移Y）
$("#Drigging").css("left", x);
$("#Drigging").css("top", y);
$("#Drigging").css('cursor','move');
})
})
</script>
  </head>
  <body>
    <div id="Drigging" style="float:left">
      拖拽层
    </div>
  </body>
</html>

I hope this article will be helpful to everyone’s jQuery programming.

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