index.vue
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<template>
<PageWrapper title="Tree基础示例">
<Row :gutter="[16, 16]">
<Col :span="8">
<BasicTree title="基础示例，默认展开第一层" :treeData="treeData" defaultExpandLevel="1" />
</Col>
<Col :span="8">
<BasicTree
title="可勾选，默认全部展开"
:treeData="treeData"
:checkable="true"
defaultExpandAll
@check="handleCheck"
/>
</Col>
<Col :span="8">
<BasicTree
title="指定默认展开/勾选示例"
:treeData="treeData"
:checkable="true"
:expandedKeys="['0-0']"
:checkedKeys="['0-0']"
/>
</Col>
<Col :span="8">
<BasicTree
title="懒加载异步树"
ref="asyncTreeRef"
:treeData="tree"
:load-data="onLoadData"
/>
</Col>
<Col :span="16">
<Card title="异步数据，默认展开">
<template #extra>
<a-button @click="loadTreeData" :loading="treeLoading">加载数据</a-button>
</template>
<Spin :spinning="treeLoading">
<BasicTree ref="asyncExpandTreeRef" :treeData="tree2" />
</Spin>
</Card>
</Col>
</Row>
</PageWrapper>
</template>
<script lang="ts">
import { defineComponent, nextTick, ref, unref } from 'vue';
import { BasicTree, TreeActionType, TreeItem } from '/@/components/Tree/index';
import { treeData } from './data';
import { PageWrapper } from '/@/components/Page';
import { Card, Row, Col, Spin } from 'ant-design-vue';
import { cloneDeep } from 'lodash-es';
export default defineComponent({
components: { BasicTree, PageWrapper, Card, Row, Col, Spin },
setup() {
const asyncTreeRef = ref<Nullable<TreeActionType>>(null);
const asyncExpandTreeRef = ref<Nullable<TreeActionType>>(null);
const tree2 = ref<TreeItem[]>([]);
const treeLoading = ref(false);
function handleCheck(checkedKeys, e) {
console.log('onChecked', checkedKeys, e);
}
function loadTreeData() {
treeLoading.value = true;
// 以下是模拟异步获取数据
setTimeout(() => {
// 设置数据源
tree2.value = cloneDeep(treeData);
treeLoading.value = false;
// 展开全部
nextTick(() => {
console.log(unref(asyncExpandTreeRef));
unref(asyncExpandTreeRef)?.expandAll(true);
});
}, 2000);
}
const tree = ref([
{
title: 'parent ',
key: '0-0',
},
]);
function onLoadData(treeNode) {
return new Promise((resolve: (value?: unknown) => void) => {
if (!treeNode.children) {
resolve();
return;
}
setTimeout(() => {
const asyncTreeAction: TreeActionType | null = unref(asyncTreeRef);
if (asyncTreeAction) {
const nodeChildren = [
{ title: `Child Node ${treeNode.eventKey}-0`, key: `${treeNode.eventKey}-0` },
{ title: `Child Node ${treeNode.eventKey}-1`, key: `${treeNode.eventKey}-1` },
];
asyncTreeAction.updateNodeByKey(treeNode.eventKey, { children: nodeChildren });
asyncTreeAction.setExpandedKeys([
treeNode.eventKey,
...asyncTreeAction.getExpandedKeys(),
]);
}
resolve();
return;
}, 1000);
});
}
return {
treeData,
handleCheck,
tree,
onLoadData,
asyncTreeRef,
asyncExpandTreeRef,
tree2,
loadTreeData,
treeLoading,
};
},
});
</script>