2020-02-04 20:45:34 +08:00
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# 树 Tree
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2020-02-25 23:03:38 +08:00
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老实说我生物不好，认不出几种树来。
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以及，不光是生物不好，平衡树也是看了就忘。
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2020-02-25 18:48:29 +08:00
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## 演示
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```demo
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basic
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2020-02-25 23:03:38 +08:00
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drag-drop
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2020-02-25 18:48:29 +08:00
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async
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2020-02-25 23:03:38 +08:00
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multiple
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filter
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2020-02-25 18:48:29 +08:00
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```
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2020-02-25 23:03:38 +08:00
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## V-model
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|Prop|Event|
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|-|-|
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|selected-keys|`selected-keys-change`|
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## Props
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|名称|类型|默认值|说明|
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|expand-on-dragenter|`boolean`|`true`|是否在拖入后展开节点|
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|block-node|`boolean`|`false`||
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|data|`Array<TreeNode>`|`[]`|树的节点数据。重新设置 data 会将一些非受控状态清空，如果你需要在使用中改动 data，最好以受控的方式控制树|
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|draggable|`boolean`|`false`||
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|checkable|`boolean`|`false`||
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|multiple|`boolean`|`false`||
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|selectable|`boolean`|`true`||
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|default-expand-all|`boolean`|`false`||
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|cancelable|`boolean`|`false`|选中之后是否允许取消|
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|remote|`boolean`|`false`|是否异步获取选项，和 onLoad 配合|
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|on-load|`(node: TreeNode) => Promise<any>`|`null`||
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|default-expanded-keys|`Array<string \| number>`|`[]`||
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|expanded-keys|`Array<string \| number>`|`null`|如果设定则展开受控|
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|selected-keys|`Array<string \| number>`|`null`|如果设定则 selected 状态受控|
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|default-selected-keys|`Array<string \| number>`|`[]`||
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|checked-keys|`Array<string \| number>`|`null`|如果设定则 checked 状态受控|
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|default-checked-keys|`Array<string \| number>`|`[]`||
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|pattern|`string`|`''`||
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|filter|`(node: TreeNode) => boolean`|一个简单的字符串过滤算法||
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## Events
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|名称|参数|说明|
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2020-02-29 14:55:52 +08:00
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|selected-keys-change|`(Array<string \| number>)`||
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|expanded-keys-change|`(Array<string \| number>)`||
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|checked-keys-change|`(Array<string \| number>)`||
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2020-02-25 23:03:38 +08:00
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|dragstart|`({ node: TreeNode, event: DragEvent })`||
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|dragend|`({ node: TreeNode, event: DragEvent })`||
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|dragenter|`({ node: TreeNode, event: DragEvent })`||
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|dragleave|`({ node: TreeNode, event: DragEvent })`||
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|drop|`({ node: TreeNode, dragNode: TreeNode, dropPosition: 'top' \| 'center' \| 'bottom', event: DragEvent })`||
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