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
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## 多层下拉列表的下拉框
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{% method %}
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[source](https://jsfiddle.net/fineui/p0hykqo9/)
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{% common %}
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```javascript
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BI.createWidget({
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type: 'bi.down_list_combo',
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element: '#wrapper',
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width: 300,
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items: [
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[{
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el: {
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text: "column 1111",
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iconCls1: "check-mark-e-font",
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value: 11
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},
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children: [{
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text: "column 1.1",
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value: 21,
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cls: "dot-e-font",
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selected: true
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}, {
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text: "column 1.222222222222222222222222222222222222",
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cls: "dot-e-font",
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value: 22,
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}]
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}],
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[{
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el: {
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type: "bi.icon_text_icon_item",
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text: "column 2",
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iconCls1: "chart-type-e-font",
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cls: "dot-e-font",
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value: 12
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},
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disabled: true,
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children: [{
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type: "bi.icon_text_item",
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cls: "dot-e-font",
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height: 25,
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text: "column 2.1",
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value: 11
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}, {
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text: "column 2.2",
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value: 12,
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cls: "dot-e-font"
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}]
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}]
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]
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});
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```
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{% endmethod %}
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##参数
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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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| 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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| adjustLength | 弹出列表和trigger的距离 | number | | 0 |
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##事件
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| 事件 | 说明 |
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| :------ |:------------- |
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|BI.DownListCombo.EVENT_CHANGE| 点击一级节点触发 |
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|BI.DownListCombo.EVENT_SON_VALUE_CHANGE| 点击二级节点触发 |
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|BI.DownListCombo.EVENT_BEFORE_POPUPVIEW| 下拉列表弹出前触发 |
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##具体配置方法见[Combo](../core/combination/bi.combo.md)
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---
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