fineui是帆软报表和BI产品线所使用的前端框架。
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# down_list_combo
## 多层下拉列表的下拉框
{% method %}
[source](https://jsfiddle.net/fineui/p0hykqo9/)
{% common %}
```javascript
BI.createWidget({
type: 'bi.down_list_combo',
element: '#wrapper',
width: 300,
items: [
[{
el: {
text: "column 1111",
iconCls1: "check-mark-e-font",
value: 11
},
children: [{
text: "column 1.1",
value: 21,
cls: "dot-e-font",
selected: true
}, {
text: "column 1.222222222222222222222222222222222222",
cls: "dot-e-font",
value: 22,
}]
}],
[{
el: {
type: "bi.icon_text_icon_item",
text: "column 2",
iconCls1: "chart-type-e-font",
cls: "dot-e-font",
value: 12
},
disabled: true,
children: [{
type: "bi.icon_text_item",
cls: "dot-e-font",
height: 25,
text: "column 2.1",
value: 11
}, {
text: "column 2.2",
value: 12,
cls: "dot-e-font"
}]
}]
]
});
```
{% endmethod %}
##参数
| 参数 | 说明 | 类型 | 可选值 | 默认值
| :------ |:------------- | :-----| :----|:----|
| el | 自定义下拉框trigger | object | | |
| trigger | 下拉列表的弹出方式 | string | click, hover | click |
| 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 |
| adjustLength | 弹出列表和trigger的距离 | number | | 0 |
##事件
| 事件 | 说明 |
| :------ |:------------- |
|BI.DownListCombo.EVENT_CHANGE| 点击一级节点触发 |
|BI.DownListCombo.EVENT_SON_VALUE_CHANGE| 点击二级节点触发 |
|BI.DownListCombo.EVENT_BEFORE_POPUPVIEW| 下拉列表弹出前触发 |
##具体配置方法见[Combo](../core/combination/bi.combo.md)
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