Pie Chart

Installation

Examples

Props

Used by

Files installed (3)

• src/app/components/ui/charts/pie-chart/pie-chart.component.ts4.9 kB

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  import {
    AfterViewInit,
    Component,
    ElementRef,
    Input,
    OnChanges,
    OnDestroy,
    SimpleChanges,
    ViewChild,
    booleanAttribute,
    ChangeDetectionStrategy,
  } from '@angular/core'
  import type * as echarts from 'echarts/core'
  import { cn } from '@/lib/utils'
  import { getChartColors, getChartTooltipBg, getChartTooltipBorder, getChartTooltipText } from '../use-chart-theme'
  
  /**
   * Angular port of the UIPKGE PieChart — category share with a bottom legend and
   * item tooltips. Standalone, theme-aware. Same inputs as the Vue `PieChart`
   * (`data`, `nameField`, `valueField`, `height`, `donut`, `option`).
   */
  @Component({
    changeDetection: ChangeDetectionStrategy.Eager,
    selector: 'ui-pie-chart, [ui-pie-chart]',
    standalone: true,
    host: {
      '[attr.data-slot]': '"pie-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 UiPieChartComponent implements AfterViewInit, OnChanges, OnDestroy {
    @Input() data: Record<string, unknown>[] = []
    @Input() nameField = 'name'
    @Input() valueField = 'value'
    /** Hollow center. Default false. */
    @Input({ transform: booleanAttribute }) donut = false
    @Input() height: number | string = 300
    @Input() option?: Record<string, unknown>
    /** Accessible name announced for the chart image. Defaults to "Chart". */
    @Input() ariaLabel?: string
    @Input('class') className?: string
  
    total(): number {
      return this.data.reduce((sum, d) => sum + (Number(d[this.valueField]) || 0), 0)
    }
    @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)
    }
  
    /** Build the merged ECharts option (pure — no DOM needed, unit-testable). */
    getOption(): Record<string, unknown> {
      const colors = getChartColors()
      const seriesData = this.data.map((d) => ({
        name: d[this.nameField],
        value: d[this.valueField],
      }))
  
      const series = {
        type: 'pie',
        radius: this.donut ? ['45%', '70%'] : '65%',
        center: ['50%', '45%'],
        itemStyle: { borderWidth: 0 },
        label: { show: false },
        data: seriesData,
      }
  
      // Per-index series merge — partial overrides keep computed `type`/`data`.
      const userOption: Record<string, any> = this.option ?? {}
      const { series: userSeries, ...userRest } = userOption
      const mergedSeries = Array.isArray(userSeries) ? [series].map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) })) : [series]
  
      return {
        color: colors,
        tooltip: {
          trigger: 'item',
          backgroundColor: getChartTooltipBg(),
          borderColor: getChartTooltipBorder(),
          textStyle: { color: getChartTooltipText(), fontSize: 12 },
          formatter: '{b}: {c} ({d}%)',
        },
        legend: {
          bottom: 0,
          icon: 'circle',
          itemWidth: 8,
          itemHeight: 8,
          textStyle: { fontSize: 11 },
        },
        series: mergedSeries,
        ...userRest,
      }
    }
  
    /** ECharts chart + component modules, resolved lazily so SSR never loads canvas code. */
    private chartModules(charts: Record<string, unknown>, comps: Record<string, unknown>): unknown[] {
      return [charts['PieChart'], comps['TooltipComponent'], comps['LegendComponent'], comps['TitleComponent']]
    }
  
    async ngAfterViewInit(): Promise<void> {
      if (typeof window === 'undefined' || !this.chartEl?.nativeElement) return
      const [{ use }, { CanvasRenderer }, charts, comps] = await Promise.all([
        import('echarts/core'),
        import('echarts/renderers'),
        import('echarts/charts'),
        import('echarts/components'),
      ])
      use([CanvasRenderer, ...(this.chartModules(charts, comps) as never[])])
      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 && Object.keys(changes).length) {
        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/pie-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/pie-chart.json

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