# 快速开始
# 纯展示
- 通过
options.defaultScrollInfo来设置树的根节点在画布中的初始位置 - 通过
options.defaultExpandAll来默认展开所有节点 - 通过
renderNode()来渲染节点
<template>
<div class="container">
<vis-tree
class="vis-tree"
:data-source="dataSource"
:options="options"
>
<template v-slot:node="nodeSlotProps">
<div class="node-container">
<div class="node-content">
{{nodeSlotProps.node.key}}
</div>
</div>
</template>
</vis-tree>
</div>
</template>
<script>
import VisTree from '@vis-tree/vue';
const originDataSource = {
key: 'O',
children: [
{
key: 'E',
children: [
{
key: 'A',
},
{
key: 'D',
children: [
{
key: 'B',
},
{
key: 'C',
},
],
},
],
},
{
key: 'F',
},
{
key: 'N',
children: [
{
key: 'G',
},
{
key: 'M',
children: [
{
key: 'H',
},
{
key: 'I',
},
{
key: 'J',
},
{
key: 'K',
},
{
key: 'L',
},
],
},
],
},
],
};
export default {
props: {
msg: String,
},
components: {
VisTree,
},
data() {
return {
dataSource: originDataSource,
options: {
defaultScrollInfo: {
key: originDataSource.key,
top: 20,
},
defaultExpandAll: true,
}
};
}
};
</script>
<style scoped>
.container {
position: relative;
background-color: #fff;
border: 1px solid #ebedf1;
border-radius: 1px;
}
.vis-tree {
width: 100%;
height: 400px;
}
.node-container {
height: 100%;
box-sizing: border-box;
background: #fff;
border: 1px solid black;
}
.node-content {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
</style>
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# 可交互
- 通过
renderNode({ node, expanded, parentNode })中的expanded的值来判断节点的状态（展开/收起） - 通过在
<vis-tree />上绑定ref，获得组件实例上的方法，此处使用toggleNodeExpanded()方法来切换一个节点的状态
<template>
<div class="container">
<vis-tree
class="vis-tree"
ref="visTree"
:data-source="dataSource"
:options="options"
>
<template v-slot:node="nodeSlotProps">
<div class="node-container">
<div class="node-content">
{{nodeSlotProps.node.key}}
</div>
<i
v-if="nodeSlotProps.node.children && nodeSlotProps.node.children.length > 0"
class="node-switcher"
:class="nodeSlotProps.expanded ? 'el-icon-circle-plus-outline' : 'el-icon-remove-outline'"
:style="{ color: `${nodeSlotProps.expanded ? 'green' : 'red'}` }"
@click="() => toggleNodeExpanded(nodeSlotProps.node.key)"
/>
</div>
</template>
</vis-tree>
</div>
</template>
<script>
import VisTree from '@vis-tree/vue';
import 'element-plus/lib/theme-chalk/index.css';
const originDataSource = {
key: 'O',
children: [
{
key: 'E',
children: [
{
key: 'A',
},
{
key: 'D',
children: [
{
key: 'B',
},
{
key: 'C',
},
],
},
],
},
{
key: 'F',
},
{
key: 'N',
children: [
{
key: 'G',
},
{
key: 'M',
children: [
{
key: 'H',
},
{
key: 'I',
},
{
key: 'J',
},
{
key: 'K',
},
{
key: 'L',
},
],
},
],
},
],
};
export default {
props: {
msg: String,
},
components: {
VisTree,
},
data() {
return {
scaleRatio: 1,
dataSource: originDataSource,
options: {
defaultScrollInfo: {
key: originDataSource.key,
}
}
};
},
methods: {
toggleNodeExpanded(key) {
this.$refs.visTree.toggleNodeExpanded(key);
},
}
};
</script>
<style scoped>
.container {
position: relative;
background-color: #fff;
border: 1px solid #ebedf1;
border-radius: 1px;
}
.vis-tree {
width: 100%;
height: 400px;
}
.node-container {
height: 100%;
box-sizing: border-box;
background: #fff;
border: 1px solid black;
}
.node-content {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.node-switcher {
width: 14px;
height: 14px;
position: absolute;
top: 100%;
left: 50%;
transform: translate(-50%, -50%);
cursor: pointer;
background: #fff;
}
</style>
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# 可缩放
通过 scaleRatio 控制画布的缩放
<template>
<div class="container">
<input
class="scale-handler"
type="range"
:min="0.1"
:max="2"
:step="0.01"
v-model="scaleRatio"
/>
<vis-tree
class="vis-tree"
ref="visTree"
:data-source="dataSource"
:scale-ratio="scaleRatio"
:options="options"
>
<template v-slot:node="nodeSlotProps">
<div class="node-container">
<div class="node-content">
{{nodeSlotProps.node.key}}
</div>
<i
v-if="nodeSlotProps.node.children && nodeSlotProps.node.children.length > 0"
class="node-switcher"
:class="nodeSlotProps.expanded ? 'el-icon-circle-plus-outline' : 'el-icon-remove-outline'"
:style="{ color: `${nodeSlotProps.expanded ? 'green' : 'red'}` }"
@click="() => toggleNodeExpanded(nodeSlotProps.node.key)"
/>
</div>
</template>
</vis-tree>
</div>
</template>
<script>
import VisTree from '@vis-tree/vue';
import 'element-plus/lib/theme-chalk/index.css';
const originDataSource = {
key: 'O',
children: [
{
key: 'E',
children: [
{
key: 'A',
},
{
key: 'D',
children: [
{
key: 'B',
},
{
key: 'C',
},
],
},
],
},
{
key: 'F',
},
{
key: 'N',
children: [
{
key: 'G',
},
{
key: 'M',
children: [
{
key: 'H',
},
{
key: 'I',
},
{
key: 'J',
},
{
key: 'K',
},
{
key: 'L',
},
],
},
],
},
],
};
export default {
props: {
msg: String,
},
components: {
VisTree,
},
data() {
return {
scaleRatio: 1,
dataSource: originDataSource,
options: {
defaultScrollInfo: {
key: originDataSource.key,
}
}
};
},
methods: {
toggleNodeExpanded(key) {
this.$refs.visTree.toggleNodeExpanded(key);
},
}
};
</script>
<style scoped>
.container {
position: relative;
background-color: #fff;
border: 1px solid #ebedf1;
border-radius: 1px;
}
.scale-handler {
position: absolute;
top: 20px;
right: 20px;
z-index: 1;
}
.vis-tree {
width: 100%;
height: 400px;
}
.node-container {
height: 100%;
box-sizing: border-box;
background: #fff;
border: 1px solid black;
}
.node-content {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.node-switcher {
width: 14px;
height: 14px;
position: absolute;
top: 100%;
left: 50%;
transform: translate(-50%, -50%);
cursor: pointer;
background: #fff;
}
</style>
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# 动态改变数据源
通过改变 dataSource 来刷新树，刷新前后根节点相对画布的位置不变
<template>
<div class="container">
<input
class="scale-handler"
type="range"
:min="0.1"
:max="2"
:step="0.01"
v-model="scaleRatio"
/>
<vis-tree
class="vis-tree"
ref="visTree"
:data-source="dataSource"
:scale-ratio="scaleRatio"
:options="options"
>
<template v-slot:node="nodeSlotProps">
<div class="node-container">
<div class="node-content">
{{nodeSlotProps.node.key}}
</div>
<div class="node-dynamic-btns">
<i
v-if="nodeSlotProps.parentNode"
class="delete-btn el-icon-delete"
@click="() => handleDelete(nodeSlotProps.parentNode, nodeSlotProps.node.key)"
/>
<i
class="add-btn el-icon-plus"
@click="() => handleAdd(nodeSlotProps.node, nodeSlotProps.expanded)"
/>
</div>
<i
v-if="nodeSlotProps.node.children && nodeSlotProps.node.children.length > 0"
class="node-switcher"
:class="nodeSlotProps.expanded ? 'el-icon-circle-plus-outline' : 'el-icon-remove-outline'"
:style="{ color: `${nodeSlotProps.expanded ? 'green' : 'red'}` }"
@click="() => toggleNodeExpanded(nodeSlotProps.node.key)"
/>
</div>
</template>
</vis-tree>
</div>
</template>
<script>
import VisTree from '@vis-tree/vue';
import 'element-plus/lib/theme-chalk/index.css';
const originDataSource = {
key: 'O',
children: [
{
key: 'E',
children: [
{
key: 'A',
},
{
key: 'D',
children: [
{
key: 'B',
},
{
key: 'C',
},
],
},
],
},
{
key: 'F',
},
{
key: 'N',
children: [
{
key: 'G',
},
{
key: 'M',
children: [
{
key: 'H',
},
{
key: 'I',
},
{
key: 'J',
},
{
key: 'K',
},
{
key: 'L',
},
],
},
],
},
],
};
export default {
props: {
msg: String,
},
components: {
VisTree,
},
data() {
return {
scaleRatio: 1,
dataSource: originDataSource,
options: {
defaultScrollInfo: {
key: originDataSource.key,
top: 20,
},
defaultExpandAll: true,
nodeWidth: 100,
nodeHeight: 50,
},
count: 1,
shouldExpandNodeKey: undefined
};
},
updated() {
if (this.shouldExpandNodeKey) {
this.$refs.visTree.toggleNodeExpanded(this.shouldExpandNodeKey);
this.shouldExpandNodeKey = undefined;
}
},
methods: {
toggleNodeExpanded(key) {
this.$refs.visTree.toggleNodeExpanded(key);
},
handleDelete(parentNode, deleteKey) {
parentNode.children = parentNode.children.filter(
(item) => item.key !== deleteKey
);
this.dataSource = { ...this.dataSource };
},
handleAdd(node, expanded) {
if (node.children) {
node.children.push({ key: this.count });
} else {
node.children = [{ key: this.count }];
}
this.count += 1;
if (!expanded) {
this.shouldExpandNodeKey = node.key;
}
this.dataSource = { ...this.dataSource };
}
}
};
</script>
<style scoped>
.container {
position: relative;
background-color: #fff;
border: 1px solid #ebedf1;
border-radius: 1px;
}
.scale-handler {
position: absolute;
top: 20px;
right: 20px;
z-index: 1;
}
.vis-tree {
width: 100%;
height: 400px;
}
.node-container {
height: 100%;
box-sizing: border-box;
background: #fff;
border: 1px solid black;
}
.node-content {
margin-top: 3px;
text-align: center;
}
.node-dynamic-btns {
display: flex;
justify-content: space-around;
}
.delete-btn {
color: #ff4d4f
}
.add-btn {
color: #1890ff
}
.node-switcher {
width: 14px;
height: 14px;
position: absolute;
top: 100%;
left: 50%;
transform: translate(-50%, -50%);
cursor: pointer;
background: #fff;
}
</style>
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