Dumbbell Chart
dumbbell-chartuiDumbbell chart around Apache ECharts custom series. Before/after dots joined per category for change comparison. Theme-aware via registry tokens.
Installation
$pnpm dlx shadcn-vue@latest add https://uipkge.dev/r/vue/dumbbell-chart.json$npx shadcn-vue@latest add https://uipkge.dev/r/vue/dumbbell-chart.json$yarn dlx shadcn-vue@latest add https://uipkge.dev/r/vue/dumbbell-chart.json$bunx shadcn-vue@latest add https://uipkge.dev/r/vue/dumbbell-chart.jsonNamed registry:
npx shadcn-vue@latest add @uipkge/dumbbell-chartInstalls to:app/components/ui/charts/dumbbell-chart/Examples
Loading interactive previews…
Loading interactive previews…
Props
| Name | Type / Values | Default | Required |
|---|---|---|---|
dataOne row per category: compare `a` vs `b`. | { label: string; a: number; b: number }[] | — | required |
namesSeries names for [a, b]. Default ['Before', 'After']. | [string, string] | () => ['Before' | optional |
height | number | string | — | optional |
option | any | — | optional |
class | string | — | optional |
ariaLabelAccessible name announced for the chart image. Defaults to "Chart". | string | — | optional |
npm dependencies
Used by
Files installed (3)
app/components/ui/charts/dumbbell-chart/DumbbellChart.vue4.1 kB
<script setup lang="ts"> import { computed } from 'vue' import { use } from 'echarts/core' import { CanvasRenderer } from 'echarts/renderers' import { CustomChart as EChartsCustomChart } from 'echarts/charts' import { GridComponent, TooltipComponent, LegendComponent } from 'echarts/components' import VChart from 'vue-echarts' import { cn } from '@/lib/utils' import { chartColors, chartTextColor, chartAxisColor, chartSplitLineColor, chartTooltipBg, chartTooltipBorder, chartTooltipText, mergeOptionBlock, } from '../useChartTheme' use([CanvasRenderer, EChartsCustomChart, GridComponent, TooltipComponent, LegendComponent]) interface Props { /** One row per category: compare `a` vs `b`. */ data: { label: string; a: number; b: number }[] /** Series names for [a, b]. Default ['Before', 'After']. */ names?: [string, string] height?: number | string option?: any class?: string /** Accessible name announced for the chart image. Defaults to "Chart". */ ariaLabel?: string } const props = withDefaults(defineProps<Props>(), { names: () => ['Before', 'After'], height: 300, }) const mergedOption = computed(() => { const colorA = chartColors.value[2] const colorB = chartColors.value[0] const series = [ { type: 'custom', renderItem: (params: any, api: any) => { const y = api.coord([0, params.dataIndex])[1] const a = api.coord([api.value(0), params.dataIndex]) const b = api.coord([api.value(1), params.dataIndex]) return { type: 'group', children: [ { type: 'line', shape: { x1: a[0], y1: y, x2: b[0], y2: y }, style: { stroke: chartAxisColor.value, lineWidth: 2 }, }, { type: 'circle', shape: { cx: a[0], cy: y, r: 6 }, style: { fill: colorA } }, { type: 'circle', shape: { cx: b[0], cy: y, r: 6 }, style: { fill: colorB } }, ], } }, data: props.data.map((d) => [d.a, d.b]), }, ] const userOption: any = props.option ?? {} const { series: userSeries, xAxis: userXAxis, yAxis: userYAxis, grid: userGrid, tooltip: userTooltip, ...userRest } = userOption const mergedSeries = Array.isArray(userSeries) ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) })) : series return { color: chartColors.value, grid: mergeOptionBlock({ left: 16, right: 16, top: 32, bottom: 24, containLabel: true }, userGrid), tooltip: mergeOptionBlock( { trigger: 'item', backgroundColor: chartTooltipBg.value, borderColor: chartTooltipBorder.value, textStyle: { color: chartTooltipText.value, fontSize: 12 }, formatter: (p: any) => `${props.data[p.dataIndex]?.label}<br/>${props.names[0]}: ${p.value[0]}<br/>${props.names[1]}: ${p.value[1]}`, }, userTooltip, ), legend: { bottom: 0, icon: 'circle', itemWidth: 8, itemHeight: 8, textStyle: { fontSize: 11, color: chartTextColor.value }, data: [ { name: props.names[0], itemStyle: { color: colorA } }, { name: props.names[1], itemStyle: { color: colorB } }, ], }, xAxis: mergeOptionBlock( { type: 'value', splitLine: { lineStyle: { color: chartSplitLineColor.value } }, axisLabel: { color: chartTextColor.value, fontSize: 11 }, }, userXAxis, ), yAxis: mergeOptionBlock( { type: 'category', inverse: true, data: props.data.map((d) => d.label), axisLine: { lineStyle: { color: chartAxisColor.value } }, axisLabel: { color: chartTextColor.value, fontSize: 11 }, axisTick: { show: false }, }, userYAxis, ), series: mergedSeries, ...userRest, } }) </script> <template> <div role="img" tabindex="0" :aria-label="ariaLabel || 'Chart'" :style="{ height: /^\d+$/.test(String(height)) ? `${height}px` : String(height) }" :class="cn('focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', props.class)" > <VChart :option="mergedOption" :autoresize="true" class="size-full" /> </div> </template>app/components/ui/charts/dumbbell-chart/index.ts0.1 kB
export { default as DumbbellChart } from './DumbbellChart.vue'app/components/ui/charts/useChartTheme.ts8.2 kB
import { computed, ref, type ComputedRef } from 'vue' // Chart palette is driven by Tailwind v4 CSS variables (`--chart-1`..`--chart-5`, // `--muted-foreground`, `--border`, `--popover`, etc.) so dark/light flips // happen automatically when the consumer toggles their theme class. The // values resolve at runtime via `getComputedStyle`, so they pick up whatever // the consumer set in their own `tailwind.css` -- no fork required. // // We bump `themeKey` whenever `<html>` class/style changes (the typical // shadcn dark-mode pivot) so every consuming `computed` re-resolves and // downstream ECharts options re-paint. const themeKey = ref(0) if (typeof window !== 'undefined') { // Bump once on the first paint so post-hydration getComputedStyle reads // the *resolved* CSS values (during SSR-built bundles the very first // computed pass returns the fallbacks below). requestAnimationFrame(() => themeKey.value++) new MutationObserver(() => themeKey.value++).observe(document.documentElement, { attributes: true, attributeFilter: ['class', 'style', 'data-theme'], }) } // ECharts' canvas renderer does not accept OKLCH in every browser. Assigning // one of our Tailwind tokens to `fillStyle` can silently leave the sentinel // colour in place, turning a whole chart black. Convert OKLCH ourselves and // let the canvas normalize older CSS colour formats. let _hexCanvas: CanvasRenderingContext2D | null = null export function toCanvasColor(cssColor: string): string { const value = cssColor.trim() const match = value.match( /^oklch\(\s*([+-]?(?:\d+\.?\d*|\.\d+))(%?)\s+([+-]?(?:\d+\.?\d*|\.\d+))\s+([+-]?(?:\d+\.?\d*|\.\d+))(?:deg)?(?:\s*\/\s*([+-]?(?:\d+\.?\d*|\.\d+))(%?))?\s*\)$/i, ) if (match) { const lightness = Number(match[1]) / (match[2] === '%' ? 100 : 1) const chroma = Number(match[3]) const hue = (Number(match[4]) * Math.PI) / 180 const alpha = match[5] == null ? 1 : Number(match[5]) / (match[6] === '%' ? 100 : 1) const a = chroma * Math.cos(hue) const b = chroma * Math.sin(hue) const l = Math.pow(lightness + 0.3963377774 * a + 0.2158037573 * b, 3) const m = Math.pow(lightness - 0.1055613458 * a - 0.0638541728 * b, 3) const s = Math.pow(lightness - 0.0894841775 * a - 1.291485548 * b, 3) const linear = [ 4.0767416621 * l - 3.3077115913 * m + 0.2309699292 * s, -1.2684380046 * l + 2.6097574011 * m - 0.3413193965 * s, -0.0041960863 * l - 0.7034186147 * m + 1.707614701 * s, ] const rgb = linear.map((channel) => { const encoded = channel <= 0.0031308 ? 12.92 * channel : 1.055 * Math.pow(channel, 1 / 2.4) - 0.055 return Math.round(Math.min(1, Math.max(0, encoded)) * 255) }) return alpha < 1 ? `rgba(${rgb.join(', ')}, ${alpha})` : `rgb(${rgb.join(', ')})` } if (typeof document === 'undefined') return cssColor if (!_hexCanvas) { _hexCanvas = document.createElement('canvas').getContext('2d') } if (!_hexCanvas) return cssColor _hexCanvas.fillStyle = '#010203' _hexCanvas.fillStyle = value const normalized = _hexCanvas.fillStyle as string return normalized === '#010203' && value.toLowerCase() !== '#010203' ? value : normalized } // Convert any CSS color (hex, rgb, oklch, color()) + alpha 0..1 to a // canvas-safe rgba(r,g,b,a). `colorString + '40'` (8-digit hex alpha) // only works when `colorString` is `#rrggbb`; once tokens resolve to // oklch() post-hydration the gradient stops break and the canvas paint // throws every frame. Stay defensive and always return rgba. export function toRgba(cssColor: string, alpha: number): string { const normalized = toCanvasColor(cssColor) if (normalized.startsWith('#') && normalized.length === 7) { const r = parseInt(normalized.slice(1, 3), 16) const g = parseInt(normalized.slice(3, 5), 16) const b = parseInt(normalized.slice(5, 7), 16) return `rgba(${r},${g},${b},${alpha})` } if (normalized.startsWith('rgba(')) { return normalized.replace(/,\s*[\d.]+\s*\)$/, `,${alpha})`) } if (normalized.startsWith('rgb(')) { return normalized.replace(/^rgb\(/, 'rgba(').replace(/\)$/, `,${alpha})`) } // Canvas refused to parse this color -- ship the original string and // let ECharts complain (better than crashing the paint loop). return cssColor } function resolveVar(name: string, fallback: string): string { if (typeof window === 'undefined') return fallback const v = getComputedStyle(document.documentElement).getPropertyValue(name).trim() if (!v) return fallback return toCanvasColor(v) } // SSR / pre-hydration fallback palette. Hex values picked to roughly // match the shadcn Neutral defaults in `tailwind.css` so the first paint // doesn't flicker. const CHART_FALLBACK = ['#f59e0b', '#14b8a6', '#3b82f6', '#f97316', '#eab308'] export const chartColors: ComputedRef<string[]> = computed(() => { themeKey.value return Array.from({ length: 5 }, (_, i) => resolveVar(`--chart-${i + 1}`, CHART_FALLBACK[i]!)) }) export const chartTextColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--muted-foreground', '#888888') }) export const chartAxisColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--border', '#e5e5e5') }) export const chartSplitLineColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--border', '#f0f0f0') }) export const chartTooltipBg: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--popover', 'rgba(255,255,255,0.96)') }) export const chartTooltipBorder: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--border', '#e5e5e5') }) export const chartTooltipText: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--popover-foreground', '#333333') }) export const chartBgColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--card', resolveVar('--background', '#ffffff')) }) // The app's accent, for the one highlighted element on a chart or map — a // selected route, a focused bar. Category series keep using chartColors. export const chartAccentColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--primary', '#38bdf8') }) // Out-of-bounds / failure colour for charts that encode good vs bad rather // than a category — control limits, error series. CSS-level marks can use // `var(--destructive)` directly; this exists because ECharts needs a resolved // colour string on the canvas. export const chartDangerColor: ComputedRef<string> = computed(() => { themeKey.value return resolveVar('--destructive', '#dc2626') }) // Two-level deep merge for ECharts option blocks (xAxis, yAxis, grid, // tooltip, legend, singleAxis, parallel, etc.). The top-level keys merge // shallowly, but one nested level (axisLabel, axisLine, splitLine, etc.) // merges shallowly too so a consumer passing `xAxis: { axisLabel: { fontSize: 9 } }` // doesn't blow away the wrapper's `color` + base font defaults on the same // axisLabel block. Arrays + primitives replace outright. // // This is the merge strategy the chart wrappers use to fold `props.option` // onto their computed base option without forcing consumers to spell out // every default they want to preserve. export function mergeOptionBlock<T extends Record<string, any>>(base: T, user: Partial<T> | undefined): T { if (!user) return base const out: any = { ...base } for (const k of Object.keys(user)) { const bv = (base as any)[k] const uv = (user as any)[k] if ( bv != null && uv != null && typeof bv === 'object' && typeof uv === 'object' && !Array.isArray(bv) && !Array.isArray(uv) ) { out[k] = { ...bv, ...uv } } else { out[k] = uv } } return out } // Default gauge stoplight: teal (safe) -> amber (warning) -> red (danger). // Pulled off saturated green and onto teal so the gauge ties back to the // dashboard palette; red is kept as the universal "limit reached" cue. // GaugeChart consumes this via its `thresholds` prop default; consumers // pass their own array to override. Static because gauges have semantic // meaning (green safe / red danger) that we deliberately don't theme-flip. export const gaugeThresholds: [number, string][] = [ [0.6, '#14b8a6'], [0.85, '#f59e0b'], [1, '#dc2626'], ]
Raw manifest:https://uipkge.dev/r/vue/dumbbell-chart.json