Ext.js 拖放
拖放功能是为简化开发人员的任务而添加的强大功能之一。拖动操作，本质上是在某个 UI 元素上的单击手势，同时按住鼠标按钮并移动鼠标。拖拽操作后释放鼠标按钮时发生放置操作。
语法
向可拖动目标添加拖放类。
var dd = Ext.create('Ext.dd.DD', el, 'imagesDDGroup', {
isTarget: false
});
将拖放目标类添加到可拖动目标。
var mainTarget = Ext.create('Ext.dd.DDTarget', 'mainRoom', 'imagesDDGroup', {
ignoreSelf: false
});
示例
以下是一个简单的例子。
<!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，我们可以将数据从网格移动到网格，从网格移动到表单。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-网格到表单
