Example code for drag and drop using angular-JS Tutorial-php.cn

Example code for drag and drop using angular

零下一度

Release： 2017-07-18 17:40:49

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There are many ways to write drag and drop. Let’s take a look at the angular version of drag and drop. The code is as follows:

<!DOCTYPE html>
<html ng-app="myApp">
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			#box{
				width: 100px;
				height: 100px;
				background: black;
				/*一定要给当前元素设置绝对定位*/
				position: absolute;
				left: 0;
				top: 0;
			}
		</style>
	</head>
	<body>
		<div id="box" my-drag></div>
	</body>
		<script src="jquery-3.1.1.min.js?1.1.11" type="text/javascript" charset="utf-8"></script>
		<script src="../js/angular.min.js?1.1.11" type="text/javascript" charset="utf-8"></script>
		<script type="text/javascript">
//			自定义一个模块
			var app = angular.module("myApp",[]);
//			自定义指令  自定义指令时一定要使用驼峰命名法
			app.directive(&#39;myDrag&#39;,function(){
//				返回一个函数
				return{
					link : function(scope,element,attr){
//						scope可以接收到的数据
// 						element 当前的元素
//						attr属性

//						拖拽的三大事件mousedown,mousemove,mouseup.使用jq绑定事件的方法进行绑定
						element.on(&#39;mousedown&#39;,function(ev){
//							通过event获取到当前对象
							var This = $(this);
//							获取到鼠标离当前元素上边框的距离
							var disX = ev.clientX - $(this).offset().left;
//							获取到元素距离左边框的距离  
//							因为在拖拽的过程中不变的是鼠标距离元素边框的距离  通过不变和已知求变量
							var disY = ev.clientY - $(this).offset().top;
							$(document).on(&#39;mousemove&#39;,function(ev){
//								将所改变的值通过样式设置给当前元素
								This.css({
									left:ev.clientX - disX,
									top:ev.clientY - disY,
								});
							});
							$(document).on(&#39;mouseup&#39;,function(){
//								鼠标松开时关闭所有事件
								$(document).off();
							})
						})
					},
					restrict:&#39;A&#39;, //ECMA    	E元素  C类名 M注释 A属性
				};
			});
		</script>
</html>

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