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概述

image 图片标记通常不会单独出现,主要在其他的标记基础上进行添加使用,可以增强数据的可视化效果,帮助更直观地传达信息。和point 标记很类似都是以 x,y 数据通道作为位置居中定位,区别在于 image 提供一个特殊的 src 数据通道,来指定图片的远程地址或者 base64。

import { Chart } from '@antv/g2';
const chart = new Chart({
container: 'container',
});
chart.options({
width: 200,
height: 60,
type: 'image',
data: [
{
x: '1',
y: 1,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*TRZHTaTeWfEAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '2',
y: 1,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*TRZHTaTeWfEAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '3',
y: 1,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*TRZHTaTeWfEAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '4',
y: 1,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*qCegRabhuUIAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '5',
y: 1,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*GNP1RLFfQV0AAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '1',
y: 2,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*TRZHTaTeWfEAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '2',
y: 2,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*TRZHTaTeWfEAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '3',
y: 2,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*qCegRabhuUIAAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '4',
y: 2,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*GNP1RLFfQV0AAAAAAAAAAAAAemJ7AQ/original',
},
{
x: '5',
y: 2,
url: 'https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*GNP1RLFfQV0AAAAAAAAAAAAAemJ7AQ/original',
},
],
// 配置视觉通道
encode: {
x: 'x', // 配置x通道
y: 'y', // 配置y通道
src: 'url', // 配置 图片src 通道
},
axis: { x: false, y: false },
});
chart.render();

更多的案例,可以查看图表示例 - 图片页面。

配置项

属性描述类型默认值必选
encode配置 image 标记的视觉通道,包括x、y、src、size等,用于指定视觉元素属性和数据之间的关系encode-✓
style配置 image 标记的图形样式style-

encode

配置 image 标记的视觉通道。

属性描述类型默认值必选
x绑定 image 标记的 x 属性通道,一般是 data 中的数值或字符,用于确定图片的 x 位置encode-✓
y绑定 image 标记的 y 属性通道,一般是 data 中的数值或字符,用于确定图片的 y 位置encode-✓
size绑定 image 标记的 size 大小通道,用于控制图片展示的大小,一般图片中所存储的信息越多,越需要放大encode-
src绑定 image 标记的 src 图片通道 ,会更具对应的数据显示图片-✓

src

最终的绘制都是调用 G 去渲染,所以支持的数据类型和 G 的原子 Image 图形保持一致,支持:

  1. 远程地址:网络地址
  2. file:本地图片地址
  3. base64:图表 base64 格式字符串
  4. blob:图片请求返回的 Blob 对象

style

属性描述类型默认值必选
width图形的宽度, 如果没有配置 图片按照 自宽高 和 size 大小 默认显示number | Function<number>-
height图形的高度, 如果没有配置 图片按照 自宽高 和 size 大小 默认显示number | Function<number>-
opacity图形的整体透明度number | Function<number>-
shadowColor图形阴影颜色string | Function<string>-
shadowBlur图形阴影的高斯模糊系数number | Function<number>-
shadowOffsetX设置阴影距图形的水平距离number | Function<number>-
shadowOffsetY设置阴影距图形的垂直距离number | Function<number>-
cursor鼠标样式。同 css 的鼠标样式,默认 'default'。string | Function<string>default

尝试一下: