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# bi.combo
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## combo,基类[BI.Widget](/core/widget.md)
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{% method %}
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[source](https://jsfiddle.net/fineui/wxykkjou/)
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{% common %}
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```javascript
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BI.createWidget({
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type: "bi.combo",
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element: "body",
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adjustLength: 2,
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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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});
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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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| el | 自定义下拉框trigger | object | — |{ }|
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| trigger | 下拉列表的弹出方式 | string | click,hover | "click" |
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| adjustLength | 弹出列表和trigger的距离 | number | — | 0 |
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| toggle | 切换状态 | boolean | true,false | true |
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| direction | 弹出列表和trigger的位置关系 | string | top | bottom | left | right | top,left | top,right | bottom,left | bottom,right | "bottom"|
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| isDefaultInit | 是否默认初始化子节点 |boolean | true,false | false |
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| destroyWhenHide | 隐藏弹窗层是否销毁 | boolean | true,false | false |
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| isNeedAdjustHeight | 是否需要高度调整 | boolean | true,false | true |
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| isNeedAdjustWidth | 是否需要宽度调整 | boolean | true,false | true |
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| stopEvent | 是否阻止事件 | boolean | true,false | false |
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| stopPropagation | 阻止事件冒泡 | boolean | true,false | false |
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| adjustXOffset | 调整横向偏移 | number | — | 0 |
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| adjustYOffset |调整纵向偏移 | number | — | 0 |
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| hideChecker | | function | — | —|
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| offsetStyle | 弹出层显示位置 | string | left,right,center | "left,right,center"|
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| popup | 弹出层 | object | — | { }|
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| comboClass | combo类 | string | — | "bi-combo-popup" |
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| hoverClass | hover类 | string | — | "bi-combo-hover" |
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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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| adjustWidth | 调整宽度 | —|
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| adjustHeight | 调整高度 | —|
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| resetListHeight | 重置列表高度 | height |
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| resetListWidth | 重置列表宽度 | width |
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| populate | 刷新列表 | items |
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| setValue |设置combo value值| v |
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| getValue | 获取combo value值 | —|
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| isViewVisible | 弹窗层是否可见 | —|
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| showView | 显示弹出层 | —|
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| hideView | 隐藏弹出层 |—|
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| getView | 获取弹出层 | —|
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| getPopupPosition | 获取弹出层的位置 | —|
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| toggle | 开启或者隐藏弹出层 | —|
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| destroy | 销毁组件 | —|
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## 事件
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| 名称 | 说明 |
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| :------ |:------------- |
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|BI.Combo.EVENT_TRIGGER_CHANGE | trigger发生改变触发 |
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|BI.Combo.EVENT_CHANGE | 弹出层点击触发 |
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|BI.Combo.EVENT_EXPAND | 下拉框展开触发 |
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|BI.Combo.EVENT_COLLAPSE | 下拉框收起触发
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|BI.Combo.EVENT_AFTER_INIT | 下拉框初始化后触发 |
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|BI.Combo.EVENT_BEFORE_POPUPVIEW | 下拉列表弹出前触发 |
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|BI.Combo.EVENT_AFTER_POPUPVIEW | 下拉列表弹出后触发 |
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|BI.Combo.EVENT_BEFORE_HIDEVIEW | 下拉列表收起前触发 |
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|BI.Combo.EVENT_AFTER_HIDEVIEW | 下拉列表收起后触发 |
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---
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