Stacked Bar Chart

Installation

Examples

Props

Used by

Files installed (3)

• src/app/components/ui/charts/stacked-bar-chart/stacked-bar-chart.component.ts7.7 kB

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  import {
    AfterViewInit,
    Component,
    ElementRef,
    Input,
    OnChanges,
    OnDestroy,
    SimpleChanges,
    ViewChild,
    ChangeDetectionStrategy,
  } from '@angular/core'
  import type * as echarts from 'echarts/core'
  import { cn } from '@/lib/utils'
  import {
    getChartBgColor,
    getChartColors,
    getChartTextColor,
    getChartAxisColor,
    getChartSplitLineColor,
    getChartTooltipBg,
    getChartTooltipBorder,
    getChartTooltipText,
    mergeOptionBlock,
  } from '../use-chart-theme'
  
  /**
   * Angular port of the UIPKGE StackedBarChart — absolute or 100% share stacking. Standalone, theme-aware. Inputs mirror React/Vue except `yField`: the Angular chart-family convention is a `string | string[]` superset of their required `yFields: string[]`.
   */
  @Component({
    changeDetection: ChangeDetectionStrategy.Eager,
    selector: 'ui-stacked-bar-chart, [ui-stacked-bar-chart]',
    standalone: true,
    host: {
      '[attr.data-slot]': '"stacked-bar-chart"',
      '[attr.data-uipkge]': '""',
      '[class]': 'hostClass',
      '[attr.role]': '"img"',
      '[attr.aria-label]': 'ariaLabel || "Chart"',
      '[attr.tabindex]': '0',
      '[style.height]': 'heightStyle',
    },
    template: `<div #chartEl class="size-full"></div>`,
  })
  export class UiStackedBarChartComponent implements AfterViewInit, OnChanges, OnDestroy {
    @Input() data: Record<string, unknown>[] = []
    @Input() xField = 'x'
    @Input() yField: string | string[] = 'y'
    /** Normalize each x to 100% shares. Default false. */
    @Input() percent = false
    /** Corner rounding in px. Default 6. */
    @Input() radius = 6
    /** Gap in px between stacked bar segments. Default 1. Set to 0 to disable. */
    @Input() stackGap = 1
    /** Color of the gap between stacked bar segments. Defaults to card background. */
    @Input() stackGapColor?: string
    @Input() height: number | string = 320
    @Input() option?: Record<string, unknown>
    /** Accessible name announced for the chart image. Defaults to "Chart". */
    @Input() ariaLabel?: string
    @Input('class') className?: string
  
    @ViewChild('chartEl', { static: false }) chartEl?: ElementRef<HTMLDivElement>
  
    private chart: echarts.ECharts | null = null
    private unsubscribeTheme: (() => void) | null = null
  
    get hostClass(): string {
      return cn('block focus-visible:ring-ring w-full focus-visible:ring-2 focus-visible:outline-none', this.className)
    }
  
    get heightStyle(): string {
      return /^\d+$/.test(String(this.height)) ? `${this.height}px` : String(this.height)
    }
    fields(): string[] {
      return Array.isArray(this.yField) ? this.yField : [this.yField]
    }
  
    /** Build the merged ECharts option (pure — no DOM needed, unit-testable). */
    getOption(): Record<string, unknown> {
      const fields = this.fields()
      const colors = getChartColors()
      const xData = this.data.map((d) => d[this.xField])
      const totals = this.data.map((d) => fields.reduce((s, f) => s + Math.abs(+d[f]! || 0), 0) || 1)
      const gapColor = this.stackGapColor ?? getChartBgColor()
      const series = fields.map((field, i) => ({
        name: field,
        type: 'bar',
        stack: 'bars',
        barMaxWidth: 34,
        itemStyle: {
          color: colors[i % colors.length],
          borderRadius: [this.radius, this.radius, this.radius, this.radius],
          ...(this.stackGap > 0 ? { borderColor: gapColor, borderWidth: this.stackGap } : {}),
        },
        label: this.percent
          ? { show: true, color: '#fff', fontSize: 10, formatter: (p: any) => `${Math.round(p.value)}%` }
          : undefined,
        data: this.data.map((d, k) => (this.percent ? (+d[field]! / totals[k]!) * 100 : +d[field]! || 0)),
      }))
      const userOption: Record<string, any> = this.option ?? {}
      const {
        series: userSeries,
        xAxis: userXAxis,
        yAxis: userYAxis,
        grid: userGrid,
        tooltip: userTooltip,
        legend: userLegend,
        ...userRest
      } = userOption
      // Re-apply radius/gap onto user-supplied series too (Vue parity), letting an
      // explicit user itemStyle win.
      const count = Math.max(fields.length, Array.isArray(userSeries) ? userSeries.length : 0)
      const mergedSeries = Array.isArray(userSeries)
        ? Array.from({ length: count }, (_, i) => {
            const s: Record<string, any> = series[i] ?? {
              name: `series-${i}`,
              type: 'bar',
              stack: 'bars',
              barMaxWidth: 34,
              itemStyle: { color: colors[i % colors.length] },
            }
            const u: Record<string, any> = userSeries[i] ?? {}
            return {
              ...s,
              ...u,
              itemStyle: {
                ...s.itemStyle,
                borderRadius: [this.radius, this.radius, this.radius, this.radius],
                ...(this.stackGap > 0 ? { borderColor: gapColor, borderWidth: this.stackGap } : {}),
                ...(u.itemStyle ?? {}),
              },
            }
          })
        : series
      return {
        color: colors,
        grid: mergeOptionBlock(
          { left: 16, right: 16, top: 24, bottom: 32, outerBoundsMode: 'same', outerBoundsContain: 'axisLabel' },
          userGrid,
        ),
        tooltip: mergeOptionBlock(
          {
            trigger: 'axis',
            axisPointer: { type: 'shadow' },
            backgroundColor: getChartTooltipBg(),
            borderColor: getChartTooltipBorder(),
            textStyle: { color: getChartTooltipText(), fontSize: 12 },
            valueFormatter: (v: any) => (this.percent ? `${(+v).toFixed(1)}%` : v),
          },
          userTooltip,
        ),
        legend: mergeOptionBlock(
          {
            bottom: 0,
            icon: 'circle',
            itemWidth: 8,
            itemHeight: 8,
            textStyle: { fontSize: 11, color: getChartTextColor() },
          },
          userLegend,
        ),
        xAxis: mergeOptionBlock(
          {
            type: 'category',
            data: xData,
            axisLine: { lineStyle: { color: getChartAxisColor() } },
            axisLabel: { color: getChartTextColor(), fontSize: 11 },
            axisTick: { show: false },
          },
          userXAxis,
        ),
        yAxis: mergeOptionBlock(
          {
            type: 'value',
            max: this.percent ? 100 : undefined,
            splitLine: { lineStyle: { color: getChartSplitLineColor() } },
            axisLabel: { color: getChartTextColor(), fontSize: 11, formatter: this.percent ? '{value}%' : '{value}' },
          },
          userYAxis,
        ),
        series: mergedSeries,
        ...userRest,
      }
    }
  
    async ngAfterViewInit(): Promise<void> {
      if (typeof window === 'undefined' || !this.chartEl?.nativeElement) return
      const [{ use }, { CanvasRenderer }, { BarChart: EChartsBarChart }, comps] = await Promise.all([
        import('echarts/core'),
        import('echarts/renderers'),
        import('echarts/charts'),
        import('echarts/components'),
      ])
      use([CanvasRenderer, EChartsBarChart, comps.GridComponent, comps.TooltipComponent, comps.LegendComponent])
      const { init } = await import('echarts/core')
      this.chart = init(this.chartEl.nativeElement)
      this.chart.setOption(this.getOption())
      const { onChartThemeChange } = await import('../use-chart-theme')
      this.unsubscribeTheme = onChartThemeChange(() => this.chart?.setOption(this.getOption()))
      if (typeof ResizeObserver !== 'undefined') {
        new ResizeObserver(() => this.chart?.resize()).observe(this.chartEl.nativeElement)
      }
    }
  
    ngOnChanges(changes: SimpleChanges): void {
      if (
        this.chart &&
        (changes['data'] ||
          changes['option'] ||
          changes['percent'] ||
          changes['radius'] ||
          changes['stackGap'] ||
          changes['stackGapColor'])
      ) {
        this.chart.setOption(this.getOption())
      }
    }
  
    ngOnDestroy(): void {
      this.unsubscribeTheme?.()
      this.unsubscribeTheme = null
      try {
        this.chart?.dispose()
      } catch {
        /* already disposed */
      }
      this.chart = null
    }
  }
  

• src/app/components/ui/charts/stacked-bar-chart/index.ts0.1 kB

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• src/app/components/ui/charts/use-chart-theme.ts7.4 kB

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Raw manifest:https://uipkge.dev/r/angular/stacked-bar-chart.json

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