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概述

brushXFilter 交互是 brushFilter 的横向限定版本,专门用于基于 X 轴维度的数据筛选。该交互限制用户只能通过水平方向的框选操作(沿 X 轴方向),对图表元素进行范围过滤,特别适用于时间序列分析、横向对比等场景。

example

核心特征:

单向操作:仅允许水平方向框选,Y 轴范围自动全选

维度聚焦:精准控制 X 轴数据范围(如时间范围、数值区间)

响应式更新:动态过滤后自动触发视图更新

import { Chart } from '@antv/g2';
const chart = new Chart({ container: 'container' });
chart.options({
type: 'line',
autoFit: true,
data: {
type: 'fetch',
value:
'https://gw.alipayobjects.com/os/antvdemo/assets/data/blockchain.json',
},
encode: {
x: (d) => new Date(d.date), // X 轴绑定时间数据
y: 'total',
},
interaction: {
brushXFilter: true, // 启用横向筛选
},
});
chart.render();

使用方式

配置 brushXFilter 交互有两种方式

快速启用模式

通过布尔值开启交互,使用默认配置:

({
type: 'interval',
interaction: { brushXFilter: true }, // 启用默认配置的X轴刷选过滤
});

自定义配置模式

通过配置项 精细化控制交互行为:

({
type: 'interval',
interaction: {
brushXFilter: {
reverse: false, // 关闭反向选择
maskFill: '#rgba(0,0,0,0.3)', // 自定义蒙版颜色
},
},
});

配置层级

交互可以配置在 Mark 层级:

({
type: 'interval',
interaction: { brushXFilter: true },
});

也可以配置在 View 层级,视图上声明的交互会传递给 children 声明的标记,如果该标记有声明对应的交互,就合并;否则不影响。

({
type: 'view',
interaction: { brushXFilter: true },
});

配置项

属性描述类型默认值必选
reversebrush 是否反转booleanfalse
mask框选区域的蒙版样式mask详见 mask

mask

配置框选区域的蒙版的样式。

属性描述类型默认值必选
maskFill蒙版的填充色string#777
maskFillOpacity蒙版的填充透明度number0.3
maskStroke蒙版的描边string#fff
maskStrokeOpacity描边透明度number
maskLineWidth蒙版描边的宽度number
maskLineDash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]
maskOpacity蒙版的整体透明度number
maskShadowColor蒙版阴影颜色string
maskShadowBlur蒙版阴影的高斯模糊系数number
maskShadowOffsetX设置阴影距蒙版的水平距离number
maskShadowOffsetY设置阴影距蒙版的垂直距离number
maskCursor鼠标样式。同 css 的鼠标样式stringdefault

在配置框选区域的蒙版样式的时候,不是以对象的形式来配置,而是以 mask前缀加属性的方式来配置。

样式配置示例:

({
interaction: {
brushXFilter: {
maskFill: '#000',
maskFillOpacity: 0.2,
maskStroke: 'red',
maskStrokeOpacity: 0.9,
maskLineWidth: 2,
maskLineDash: [4, 8],
maskOpacity: 0.2,
maskShadowColor: '#d3d3d3',
maskShadowBlur: 10,
maskShadowOffsetX: 10,
maskShadowOffsetY: 10,
maskCursor: 'pointer',
},
},
});

事件

监听事件

监听刷选过滤动作:

chart.on('brush:filter', (event) => {
const {
data, // 筛选后的数据集合
nativeEvent, // 原始 DOM 事件
} = event;
const [xStart, xEnd] = data.selection[0];
console.log(`筛选范围:${xStart} ~ ${xEnd}`);
});

触发交互

通过编程方式触发筛选:

// 设置 X 轴筛选范围(时间戳示例)
chart.emit('brush:filter', {
data: {
selection: [
[new Date('2023-01-01').getTime(), new Date('2023-06-30').getTime()],
],
},
});

案例

import { Chart } from '@antv/g2';
const data = [
{ letter: 'A', frequency: 0.08167 },
{ letter: 'B', frequency: 0.01492 },
{ letter: 'C', frequency: 0.02782 },
{ letter: 'D', frequency: 0.04253 },
{ letter: 'E', frequency: 0.12702 },
{ letter: 'F', frequency: 0.02288 },
{ letter: 'G', frequency: 0.02015 },
{ letter: 'H', frequency: 0.06094 },
{ letter: 'I', frequency: 0.06966 },
{ letter: 'J', frequency: 0.00153 },
{ letter: 'K', frequency: 0.00772 },
{ letter: 'L', frequency: 0.04025 },
{ letter: 'M', frequency: 0.02406 },
{ letter: 'N', frequency: 0.06749 },
{ letter: 'O', frequency: 0.07507 },
{ letter: 'P', frequency: 0.01929 },
{ letter: 'Q', frequency: 0.00095 },
{ letter: 'R', frequency: 0.05987 },
{ letter: 'S', frequency: 0.06327 },
{ letter: 'T', frequency: 0.09056 },
{ letter: 'U', frequency: 0.02758 },
{ letter: 'V', frequency: 0.00978 },
{ letter: 'W', frequency: 0.0236 },
{ letter: 'X', frequency: 0.0015 },
{ letter: 'Y', frequency: 0.01974 },
{ letter: 'Z', frequency: 0.00074 },
];
const chart = new Chart({
container: 'container',
});
chart.options({
autoFit: true,
interaction: {
brushXFilter: {
maskFill: '#000',
maskFillOpacity: 0.2,
maskStroke: 'red',
maskStrokeOpacity: 0.9,
maskLineWidth: 2,
maskLineDash: [4, 8],
maskOpacity: 0.2,
maskShadowColor: '#d3d3d3',
maskShadowBlur: 10,
maskShadowOffsetX: 10,
maskShadowOffsetY: 10,
maskCursor: 'pointer',
},
},
});
chart.interval().data(data).encode('x', 'letter').encode('y', 'frequency');
chart.render();