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# bi.bubble_combo
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## 表示一个可以展开的节点, 不仅有选中状态而且有展开状态, 基类[BI.Widget](/core/widget.md)
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{% method %}
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[source](https://jsfiddle.net/fineui/urvt04so/)
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{% common %}
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```javascript
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BI.createWidget({
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type: "bi.bubble_combo",
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element:"#wrapper",
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el: {
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type: "bi.button",
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text: "测试",
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height: 25
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},
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popup: {
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el: {
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type: "bi.button_group",
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items: BI.makeArray(100, {
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type: "bi.text_item",
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height: 25,
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text: "item"
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}),
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layouts: [{
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type: "bi.vertical"
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}]
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},
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maxHeight: 200
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}
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})
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```
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{% endmethod %}
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## API
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##### 基础属性
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| 参数 | 说明 | 类型 | 可选值 | 默认值
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| :------ |:------------- | :-----| :----|:----
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| text | | string | | "" |
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| value | 组件value值 | string | |""|
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| stopEvent | 阻止事件 |boolean | true,false | false |
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| stopPropagation | 阻止冒泡 | boolean | true,false| false |
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| selected | button的选中状态 | boolean | true,false |false |
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| once | 点击一次选中有效,再点无效 | boolean | true,false | false|
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| forceSelected | 点击即选中, 选中了就不会被取消,与once的区别是forceSelected不影响事件的触发| boolean | true,false| false|
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| forceNotSelected | 无论怎么点击都不会被选中 | boolean| true,false | false|
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| disableSelected | 使能选中| boolean | true,false| false|
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| shadow | 是否显示阴影 | boolean| true,false| false|
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| isShadowShowingOnSelected| 选中状态下是否显示阴影|boolean| true,false | false|
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| trigger | 被选元素要触发的事件 | string | mousedown, mouseup, click, dblclick, lclick | null|
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| handler | 点击事件回调 | function | | BI.emptyFn |
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## 对外方法
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| 名称 | 说明 | 回调参数
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| :------ |:------------- | :-----
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| bindEvent | 绑定事件| —|
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| beforeClick | 点击事件之前 | —|
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| doClick | 点击事件 | — |
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| handle | 返回该对象 | —|
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| hover | hover事件| —|
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| dishover | 取消hover事件| —|
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|setSelected | 设置选中的文本| b|
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| isSelected | 是否被选中| —|
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| isOnce | 是否只允许点击一次| —|
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| isForceSelected| 判断是否点击即选中| —|
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| isForceNotSelected| 判断是否怎么点击都不会被选中|—|
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| isDisableSelected| 判断是否让选中|—|
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| setText| 设置文本值|—|
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| getText| 获取文本值|—|
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| empty| 清空组件|—|
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| destroy| 销毁组件|—|
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---
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