EasyUI系列学习(四)-Droppable(放置)_html/css_WEB-ITnose

一、创建组件

1.使用标签创建一个放置区

<div id="pox" class="easyui-droppable" style="width: 200px; height: 100px; left: 100px; background:cyan"></div>

2.使用JavaScript创建一个放置区

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan"></div><script>    $(function () {        $("#pox").droppable();    })</script>

二、属性

1.accept：哪些元素会对放置区有影响

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box1" style="width:100px;height:50px;left:100px;background:lightcoral">物品1</div><div id="box2" style="width:100px;height:50px;left:100px;background:darkseagreen">物品2</div><script>    $(function() {        $("#box1").draggable();        $("#box2").draggable();        $("#pox").droppable({            accept: "#box1,#box2",            onDragEnter: function(e, source) {                //source分别放入的物体，即box1对象，box2对象                alert($(source).html());            },        });    });</script>

2.disabled：如果为true，则禁止放置，即放置没有效果

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box1" style="width:100px;height:50px;left:100px;background:lightcoral">物品1</div><div id="box2" style="width:100px;height:50px;left:100px;background:darkseagreen">物品2</div><script>    $(function () {        $("#box1").draggable();        $("#box2").draggable();        $("#pox").droppable({            accept: "#box1,#box2",            disabled: true,            onDragEnter: function (e, source) {                //不会弹出任何东西                alert($(source).html());            },        });    });</script>

三、事件

1.onDragEnter：在被拖拽元素到放置区内的时候触发，source参数表示被拖拽的DOM元素

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },        });    });</script>

2.onDragLeave：在被拖拽元素离开放置区的时候触发，source参数表示被拖拽的DOM元素

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },            onDragLeave: function (e, source) {                $(this).css("background", "yellow");            }        });    });</script>

3.onDrop：在被拖拽元素放入到放置区的时候触发，source参数表示被拖拽的DOM元素

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },            onDragLeave: function (e, source) {                $(this).css("background", "yellow");            },            onDrop: function (e, source) {                $(this).css("background", "green");            }        });    });</script>

4.onDragOver：在被拖拽元素经过放置区的时候触发，source参数表示被拖拽的DOM元素

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },            onDragLeave: function (e, source) {                $(this).css("background", "yellow");            },            onDrop: function (e, source) {                $(this).css("background", "green");            },            onDragOver: function (e, source) {                $(this).css("background", "orange");            }        });    });</script>

四、方法

1.options：返回属性对象

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#pox").droppable({            accept: "#box"        });        console.log($("#pox").droppable("options"));    });</script>

2.disable：禁用放置功能

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },        });        //放置物品不会变色        $("#pox").droppable("disable");    });</script>

3.enable：启用放置功能

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },        });        $("#pox").droppable("disable");        //放置区会变色        $("#pox").droppable("enable");    });</script>

五、重写默认对象

1.使用$.fn.droppable.defaults重写默认值对象

<div id="pox" style="width: 200px; height: 100px; left: 100px; background:cyan">放置区</div><div id="box" style="width:100px;height:50px;left:100px;background:lightcoral">物品</div><script>    $(function () {        $.droppable.defaults.disabled = true;        $("#box").draggable();        $("#pox").droppable({            accept: "#box",            onDragEnter: function (e, source) {                $(this).css("background", "red");;            },        });    });</script>