拖放功能是为使开发人员的任务变得简单而添加的强大功能之一.实际上，拖动操作是某个UI元素上的单击手势，同时按住鼠标按钮并移动鼠标.在拖动操作后释放鼠标按钮时会发生放置操作.
将拖放类添加到可拖动目标.
var dd = Ext.create('Ext.dd.DD'，el，'imagesDDGroup'，{
isTarget:false
});将拖放目标类添加到可拖放目标.
var mainTarget = Ext.create('Ext.dd.DDTarget'，'mainRoom'，'imagesDDGroup'，{
ignoreSelf:false
});以下是一个简单示例.
<!DOCTYPE html>
<html>
<head>
<link href = "https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css"
rel = "stylesheet" />
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/ext-all.js"></script>
<script type = "text/javascript">
Ext.application ({
launch: function() {
var images = Ext.get('images').select('img');
Ext.each(images.elements, function(el) {
var dd = Ext.create('Ext.dd.DD', el, 'imagesDDGroup', {
isTarget: false
});
});
}
});
var mainTarget = Ext.create('Ext.dd.DDTarget', 'mainRoom', 'imagesDDGroup', {
ignoreSelf: false
});
</script>
<style>
#content {
width:600px;
height:400px;
padding:10px;
border:1px solid #000;
}
#images {
float:left;
width:40%;
height:100%;
border:1px solid Black;
background-color:rgba(222, 222, 222, 1.0);
}
#mainRoom {
float:left;
width:55%;
height:100%;
margin-left:15px;
border:1px solid Black;
background-color:rgba(222, 222, 222, 1.0);
}
.image {
width:64px;
height:64px;
margin:10px;
cursor:pointer;
border:1px solid Black;
display: inline-block;
}
</style>
</head>
<body>
<div id = "content">
<div id = "images">
<img src = "/extjs/images/1.jpg" class = "image" />
<img src = "/extjs/images/2.jpg" class = "image" />
<img src = "/extjs/images/3.jpg" class = "image" />
<img src = "/extjs/images/4.jpg" class = "image" />
<img src = "/extjs/images/5.jpg" class = "image" />
<img src = "/extjs/images/6.jpg" class = "image" />
<img src = "/extjs/images/7.jpg" class = "image" />
<img src = "/extjs/images/8.jpg" class = "image" />
</div>
<div id = "mainRoom"></div>
</div>
</body>
</html>上述程序将产生以下结果 :
借助Extjs中的拖放功能，我们可以移动数据网格到网格和网格形成.以下是在网格和表单之间移动数据的示例.
拖放 - 网格到网格
拖放 - 网格到表格
