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概述

旭日图( sunburst )作为一种强大且直观的数据可视化手段,在多种领域中的应用及其优势与局限。通过环形布局,旭日图有效地展现了数据间的层次关系和比例分配,尤其适用于那些具有明确父子关系的数据集。尽管存在一些限制,但其独特的设计使其成为商业分析、地理学研究等领域不可或缺的工具之一。融合了饼图和树状图的优点,采用圆形分割的方式来展示多层嵌套的信息结构。这种图表不仅能够清晰地反映出不同组别之间的相对大小,还能保持良好的视觉效果。比起树图,具备节省空间、整体情况更加直观等优点。

sunburst 通过 g2ExtensionPlot 中以 rect 为基础实现,内部实现下钻事件、极坐标、数据转化、样式优化等。

import { plotlib } from '@antv/g2-extension-plot';
import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...plotlib() });
const chart = new Chart({
container: 'container',
autoFit: true,
});
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: {
value: 'sum',
},
labels: [
{
text: 'name',
transform: [
{
type: 'overflowHide',
},
],
},
],
});
chart.render();

更多的案例,可以查看图表示例 - 旭日图 页面。

配置项

属性描述类型默认值必选
encode配置 sunburst 标记的视觉通道,包括 value 等,用于指定视觉元素属性和数据之间的关系encode-✓
coordinate配置 sunburst 标记的坐标系,坐标系会执行一系列点转换,从而改变标记的空间展示形式coordinate{type: 'polar' }
interaction配置 sunburst 标记的交互配置,内置了 drillDown 下钻配置interaction{ drillDown: true }
style配置 sunburst 标记的图形样式style-

encode

配置 sunburst 标记的视觉通道。

属性描述类型默认值必选
value绑定 sunburst 标记的 value 属性通道,用于数据 data 中的数值字段encode-✓
color绑定 sunburst 标记的 color 属性通道,如果将数据字段映射到颜色通道,会对数据进行分组,将数据拆分成多个不同颜色的图形,一般用来配置堆叠柱状图等。内置配置为 ancestor-node, 用于区分不同的路径分组encodeancestor-node

value

sunburst 标记的位置视觉通道需要 value 字段的值,在 data 中,会通过字段计算每一个分组中的数值。内部会把树形结构数据,转化为平铺的 rect 需要的数据。

{
type: 'sunburst',
data: {
value: {
name: 'root',
children: [
{
name: '分组1', // 自动计算 value 为 220
children: [
{ name: '分组1-1', count: 100 },
{ name: '分组1-2', count: '120' },
],
},
{
name: '分组2', // 自动计算 value 为 190
count: 220, // 为了映射合理,不会采用自身的 value
children: [
{ name: '分组2-1', count: 'aaa' }, // 不符合数值的参数
{ name: '分组2-2', count: '190' },
],
},
],
},
},
encode: { value: 'count' },
}

树形结构数据内部转化为平铺数据:

{
data: [
{ 'ancestor-node': '分组1', path: '分组1', value: 220, x: [0, 0.536...], y: [0.333.., 0.666...], depth: 1, ... },
{ 'ancestor-node': '分组2', path: '分组2', value: 190, x: [0.536..., 1], y: [0.333.., 0.666...], depth: 1, ... },
{ 'ancestor-node': '分组1', path: '分组1 / 分组1-2', value: 120, x: [0, 0.292...],y: [0.666..., 1], depth: 2, ... },
{ 'ancestor-node': '分组1', path: '分组1 / 分组1-1', value: 100, ... },
{ 'ancestor-node': '分组2', path: '分组2 / 分组2-2', value: 190, ... },
{ 'ancestor-node': '分组2', path: '分组2 / 分组2-1', value: 0, ... }, // 不符合数值默认为 0
],
}

color

color 视觉通道影响 sunburst 图形标记的填充颜色。在区间图上应用时一般映射分类字段,对数据进行分组,默认为内置 ancestor-node 路径分组。

import { plotlib } from '@antv/g2-extension-plot';
import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...plotlib() });
const chart = new Chart({
container: 'container',
autoFit: true,
});
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: {
value: 'sum',
color: 'name',
},
});
chart.render();

尝试使用回调进行分组:

import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...g2ExtensionPlot.plotlib() });
const chart = new Chart();
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: {
value: 'sum',
color: (data) => {
const paths = data.path.split(' / ');
return [paths[0], paths[1]].join('/');
},
},
});
chart.render();

coordinate

sunburst 默认配置了极坐标:

{
coordinate: {
type: 'polar',
innerRadius: 0.2,
}
}

可外部配置极坐标坐标 polar :

import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...g2ExtensionPlot.plotlib() });
const chart = new Chart();
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: { value: 'sum' },
coordinate: {
type: 'polar',
innerRadius: 0.3,
outerRadius: 0.9,
},
});
chart.render();

还原为直角坐标系 cartesian :

import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...g2ExtensionPlot.plotlib() });
const chart = new Chart();
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: { value: 'sum' },
coordinate: { type: 'cartesian' },
});
chart.render();

interaction

sunburst 默认配置内置了 drillDown 交互事件,

import { Runtime, corelib, extend } from '@antv/g2';
const Chart = extend(Runtime, { ...corelib(), ...g2ExtensionPlot.plotlib() });
const chart = new Chart();
chart.options({
type: 'sunburst',
data: {
type: 'fetch',
value: 'https://gw.alipayobjects.com/os/antvdemo/assets/data/sunburst.json',
},
encode: { value: 'sum' },
interaction: {
drillDown: {
// 面包屑样式
breadCrumb: {
rootText: '总名称',
style: {
fontSize: '18px',
fill: '#333',
},
active: {
fill: 'red',
},
},
// 用于下钻后是否维持原来颜色
isFixedColor: true,
},
},
});
chart.render();

style

style 用于设置图表元素的外观样式,包括填充颜色、边框样式、阴影效果等。

属性描述类型默认值
radius矩形的四个圆角大小number | (datum, index, data, column) => number0
radiusTopLeft左上角的圆角number | (datum, index, data, column) => number0
radiusTopRight右上角的圆角number | (datum, index, data, column) => number0
radiusBottomRight右下角的圆角number | (datum, index, data, column) => number0
radiusBottomLeft左下角的圆角number | (datum, index, data, column) => number0
inset矩形四个方向的内边距number | (datum, index, data, column) => number0
insetLeft左边的内间距number | (datum, index, data, column) => number0
insetRight右边的内间距number | (datum, index, data, column) => number0
insetBottom下面的内间距number | (datum, index, data, column) => number0
insetTop上面的内间距number | (datum, index, data, column) => number0
fill图形的填充色number | (datum, index, data, column) => string-
fillOpacity图形的填充透明度number | (datum, index, data, column) => number-
stroke图形的描边number | (datum, index, data, column) => string-
strokeOpacity描边透明度number | (datum, index, data, column) => number-
lineWidth图形描边的宽度number | (datum, index, data, column) => number-
lineDash描边的虚线配置,第一个值为虚线每个分段的长度,第二个值为分段间隔的距离。lineDash 设为[0, 0]的效果为没有描边。[number,number] |(datum, index, data, column) => [number, number]-
opacity图形的整体透明度number | (datum, index, data, column) => number-
shadowColor图形阴影颜色number | (datum, index, data, column) => string-
shadowBlur图形阴影的高斯模糊系数number | (datum, index, data, column) => number-
shadowOffsetX设置阴影距图形的水平距离number | (datum, index, data, column) => number-
shadowOffsetY设置阴影距图形的垂直距离number | (datum, index, data, column) => number-
cursor鼠标样式。同 css 的鼠标样式,默认 'default'。number | (datum, index, data, column) => string'default'

尝试一下

更多的style配置,可以查看 style 介绍页面。