zz-chart
Version:
Alauda Chart components by Alauda Frontend Team
331 lines • 13 kB
JavaScript
import { select } from 'd3';
import * as d3 from 'd3';
import { get, isFunction } from 'lodash-es';
import { measureText } from '../../strategy/utils.js';
import { createSvg, getChartColor, PolarShapeType, template, } from '../../utils/index.js';
import { getRadius } from './pie.js';
import { PolarShape } from './index.js';
const START_ANGLE = -(Math.PI / 1.5);
const END_ANGLE = Math.PI / 1.5;
/**
* Gauge
*/
export default class Gauge extends PolarShape {
constructor() {
super(...arguments);
this.type = PolarShapeType.Gauge;
this.data = this.getData();
this.startAngle = -(Math.PI / 1.5);
this.endAngle = Math.PI / 1.5;
}
get nullData() {
return this.data.every(d => !d.value);
}
get colorVar() {
return this.ctrl.getTheme().colorVar;
}
get total() {
return this.getData().reduce((pre, cur) => (cur.value || 0) + pre, 0);
}
get max() {
return Math.max(this.option?.max || 100, this.total);
}
init() {
// do nothing.
}
render() {
this.option = get(this.ctrl.getOption(), this.type);
this.svgEl = this.svgEl || createSvg(select(this.ctrl.container));
this.container = this.container || this.svgEl.append('g');
this.renderPie();
requestAnimationFrame(() => {
this.renderText();
this.renderLabel();
});
}
renderText() {
if (this.option?.text?.show !== false && this.option?.text) {
const { color, size = 12 } = this.option?.text;
const majorTicks = 5;
const scale = d3.scaleLinear().range([0, 1]).domain([0, 100]);
const labelInset = 0;
const ticks = scale.ticks(majorTicks);
const { clientHeight } = this.svgEl.node();
const minAngle = (this.startAngle * 180) / Math.PI;
const maxAngle = (this.endAngle * 360) / Math.PI;
const spacing = 2;
const r = clientHeight / 2 + spacing;
const lg = this.container
.append('g')
.attr('class', 'label')
.attr('transform', `translate(${0},${0})`);
lg.selectAll('text')
.data(ticks)
.enter()
.append('text')
.attr('font-size', size)
.attr('transform', function (d, i, v) {
const ratio = scale(d);
const { width } = measureText(String(d));
const newAngle = minAngle + ratio * maxAngle;
const angle = v.length - 1 === i ? newAngle - (width - 4) : newAngle;
return 'rotate(' + angle + ') translate(0,' + (labelInset - r) + ')';
})
.attr('fill', (value) => {
if (isFunction(color)) {
return color(value);
}
return color || this.colorVar['n-4'];
})
.text(v => v);
}
}
renderPie() {
const { clientWidth, clientHeight } = this.svgEl.node();
const radius = Math.min(clientWidth, clientHeight) / 2;
if (!clientWidth && !clientHeight) {
return;
}
const colors = this?.option?.colors
?.sort((a, b) => b[0] - a[0])
?.reduce((pre, cur) => {
const value = Math.max(this.max - cur[0], 0) - pre.reduce((p, c) => p + c[0], 0);
return [...pre, [parseFloat(value.toFixed(2)), cur[1]]];
}, []);
const data = colors?.reverse()?.map(([value, color]) => ({
name: color,
color,
value,
})) || [];
const colorPaths = data.length
? calculatePaths(data, {
...this.option,
startAngle: this.startAngle,
endAngle: this.endAngle,
itemStyle: {
borderRadius: 0,
borderWidth: 0,
},
innerRadius: 0.95,
outerRadius: this.option?.outerRadius ?? radius,
backgroundColor: this.colorVar['n-8'],
}, this.colorVar['n-8'])
: [];
const outerRadius = this.option?.outerRadius ?? radius;
const innerRadius = this.option?.innerRadius || 0.85;
// const r = (END_ANGLE * 180) / Math.PI;
// const padding = 8;
// const padding = (clientHeight - r) / 2;
const values = this.ctrl.getData().map(item => ({
...item,
color: this.handlePieColor(item.value, this?.option?.colors?.sort((a, b) => b[0] - a[0]) || []) || item.color,
}));
const valuePaths = calculatePaths(values, {
...this.option,
total: this.option?.max || 100,
startAngle: START_ANGLE,
endAngle: END_ANGLE,
itemStyle: {
borderRadius: 0,
borderWidth: 0,
},
innerRadius,
outerRadius: outerRadius - radius * 0.08,
backgroundColor: this.colorVar['n-8'],
}, this.colorVar['n-8'], 0.01);
this.container
.attr('transform', `translate(${clientWidth / 2},${0})`)
.selectAll('path')
.data([...colorPaths, ...valuePaths])
.join('path')
.attr('fill', e => e.config.color)
.attr('d', e => e.path);
requestAnimationFrame(() => {
const { height } = this.container.node().getBBox();
const ww = Math.min(clientWidth, clientHeight);
const cH = ww < height ? 0 : (ww - height) / 2;
this.container.attr('transform', `translate(${clientWidth / 2},${height - cH})`);
});
}
handlePieColor(value, colors) {
for (const item of colors) {
if (value >= item[0] && item[0] !== null) {
return item[1];
}
}
return '';
}
// eslint-disable-next-line sonarjs/cognitive-complexity
renderLabel() {
if (this.option?.label) {
const { colors } = this.option;
const { text, description, position, textStyle, descriptionStyle } = this.option?.label;
const isColors = !!colors?.length;
if (!this.pieGuide) {
this.pieGuide = this.svgEl.append('text');
}
if (!this.pieDescription) {
this.pieDescription = this.svgEl.append('text');
}
const { clientWidth, clientHeight } = this.svgEl.node();
const { height } = this.container.node().getBBox();
const ww = Math.min(clientWidth, clientHeight);
const cH = ww < height ? 0 : (ww - height) / 2;
const textColor = textStyle?.color || this.ctrl.getTheme().gauge.textColor;
const descriptionColor = descriptionStyle?.color || this.ctrl.getTheme().gauge.descriptionColor;
if (description) {
const centerDesc = this.pieDescription
.attr('class', 'centerText')
.attr('text-anchor', 'middle')
.attr('x', clientWidth / 2 + (position?.x || 0))
.attr('y', ww - cH + (position?.y || 0) + cH / (isColors ? 1.2 : 5))
.attr('stroke', descriptionColor)
.attr('fill', descriptionColor);
const fontSize = Math.min(clientWidth, clientHeight) / 15;
const data = this.getData();
const str = isFunction(description)
? description(data)
: template(description, { data });
centerDesc.style('font-size', fontSize + 'px')
.text(this.truncateText(str, fontSize, clientWidth * 0.8));
}
if (text) {
const centerText = this.pieGuide
.attr('class', 'centerText')
.attr('text-anchor', 'middle')
.attr('x', clientWidth / 2 + (position?.x || 0))
.attr('y', ww - cH + (position?.y || 0) + (isColors ? 0 : -(cH / 2)))
.attr('stroke', textColor)
.attr('fill', textColor);
const fontSize = Math.min(clientWidth, clientHeight) / 8;
const data = this.getData();
const str = isFunction(text)
? text(data, this.total)
: template(text, { value: this.total, data }) || text;
centerText.style('font-size', fontSize + 'px')
.text(this.truncateText(str, fontSize, clientWidth * 0.8));
}
}
}
/**
* 截断文本并添加省略号
* @param text 原始文本
* @param fontSize 字体大小
* @param maxWidth 最大宽度
* @returns 处理后的文本
*/
truncateText(text, fontSize, maxWidth) {
if (!text)
return '';
const { width } = measureText(text, fontSize);
if (width <= maxWidth)
return text;
// 如果文本宽度超过最大宽度，则进行截断
const ellipsis = '...';
const ellipsisWidth = measureText(ellipsis, fontSize).width;
let truncatedText = text;
let truncatedWidth = width;
// 逐个字符截断直到文本宽度小于最大宽度
while (truncatedWidth > maxWidth - ellipsisWidth && truncatedText.length > 0) {
truncatedText = truncatedText.slice(0, -1);
truncatedWidth = measureText(truncatedText, fontSize).width;
}
return truncatedText + ellipsis;
}
redraw() {
const { textStyle, descriptionStyle } = this.option?.label || {};
if (this.pieDescription) {
const descriptionColor = descriptionStyle?.color || this.ctrl.getTheme().gauge.descriptionColor;
this.pieDescription
.attr('stroke', descriptionColor)
.attr('fill', descriptionColor);
}
if (this.pieGuide) {
const textColor = textStyle?.color || this.ctrl.getTheme().gauge.textColor;
this.pieGuide.attr('stroke', textColor).attr('fill', textColor);
}
}
}
function calculatePaths(data, option, color, angleMin) {
const sum = data.reduce((acc, curr) => acc + curr.value, 0);
const total = Math.max(option.total ?? sum, sum);
const startAngle = (option.startAngle || 0) % (2 * Math.PI);
const endAngle = (option.endAngle || 0) % (2 * Math.PI) || 2 * Math.PI;
const diffAngle = endAngle < startAngle
? ((endAngle - startAngle) % (2 * Math.PI)) + 2 * Math.PI
: endAngle - startAngle;
const angles = data.map(data => Math.max((data.value / total) * diffAngle, data.value === 0 ? 0 : angleMin || 0), 5);
const { outerRadius, innerRadius } = getRadius(option);
const { borderRadius = 2, borderWidth = 0 } = option?.itemStyle || {};
const arc = d3
.arc()
.cornerRadius(borderRadius)
.padAngle((borderWidth * Math.PI) / 180);
let accumulate = startAngle;
const baseConifg = {
innerRadius,
outerRadius,
borderRadius,
borderWidth,
};
const innerDisc = option.innerDisc
? [
{
path: arc({
innerRadius,
outerRadius: innerRadius - 4,
startAngle,
endAngle,
}),
config: {
color,
startAngle,
endAngle,
...baseConifg,
},
},
]
: [];
return angles.reduce((acc, curr, ind) => {
const startAngle = accumulate;
const endAngle = accumulate + angles[ind];
const result = [
...acc,
{
path: arc({
innerRadius,
outerRadius,
startAngle,
endAngle,
}),
config: {
color: data[ind].color || getChartColor(ind),
startAngle,
endAngle,
...baseConifg,
},
data: data[ind],
},
];
accumulate += curr;
return result;
}, [
{
path: arc({
innerRadius,
outerRadius,
startAngle: option.startAngle || startAngle,
endAngle: option.endAngle || endAngle,
}),
config: {
color: option.backgroundColor || 'transparent',
...baseConifg,
startAngle: option.startAngle || startAngle,
endAngle: option.endAngle || endAngle,
},
data: null,
},
...innerDisc,
]);
}
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