Theme River

Installation

Examples

Props

Used by

Files installed (3)

• src/app/components/ui/charts/theme-river/theme-river.component.ts5.1 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 {
    getChartAxisColor,
    getChartColors,
    getChartTextColor,
    getChartTooltipBg,
    getChartTooltipBorder,
    getChartTooltipText,
    mergeOptionBlock,
  } from '../use-chart-theme'
  
  /**
   * Angular port of the UIPKGE ThemeRiver — streamgraph centred on a baseline. Standalone, theme-aware. Same inputs as the Vue `ThemeRiver` (`data`, `height`, `option`).
   */
  @Component({
    changeDetection: ChangeDetectionStrategy.Eager,
    selector: 'ui-theme-river, [ui-theme-river]',
    standalone: true,
    host: {
      '[attr.data-slot]': '"theme-river"',
      '[attr.data-uipkge]': '""',
      '[class]': 'hostClass',
      '[attr.role]': '"img"',
      '[attr.aria-label]': 'ariaLabel || "Chart"',
      '[style.height]': 'heightStyle',
    },
    template: `<div #chartEl class="size-full"></div>`,
  })
  export class UiThemeRiverComponent implements AfterViewInit, OnChanges, OnDestroy {
    /** `[time, value, category]` event tuples. */
    @Input() data: [string | number, number, 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 {
      // Bare `w-full` frame like React's ChartFrame with focusable={false}: role + label, no tab stop.
      return cn('block w-full', 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 series = [
        {
          type: 'themeRiver',
          data: this.data,
          label: { show: false },
          emphasis: { itemStyle: { shadowBlur: 12, shadowColor: 'rgba(0,0,0,0.2)' } },
        },
      ]
      const userOption: Record<string, any> = this.option ?? {}
      const {
        series: userSeries,
        tooltip: userTooltip,
        legend: userLegend,
        singleAxis: userAxis,
        ...userRest
      } = userOption
      const mergedSeries = Array.isArray(userSeries) ? series.map((s, i) => ({ ...s, ...(userSeries[i] ?? {}) })) : series
      return {
        color: colors,
        tooltip: mergeOptionBlock(
          {
            trigger: 'axis',
            axisPointer: { type: 'line', lineStyle: { color: getChartAxisColor(), opacity: 0.8 } },
            backgroundColor: getChartTooltipBg(),
            borderColor: getChartTooltipBorder(),
            textStyle: { color: getChartTooltipText(), fontSize: 12 },
          },
          userTooltip,
        ),
        legend:
          userLegend?.show === false
            ? undefined
            : mergeOptionBlock(
                {
                  bottom: 0,
                  icon: 'circle',
                  itemWidth: 8,
                  itemHeight: 8,
                  data: [...new Set(this.data.map((d) => d[2]))],
                  textStyle: { fontSize: 11, color: getChartTextColor() },
                },
                userLegend,
              ),
        singleAxis: mergeOptionBlock(
          {
            top: 12,
            bottom: 40,
            type: 'time',
            axisTick: { show: false },
            axisLabel: { color: getChartTextColor(), fontSize: 11 },
            axisLine: { lineStyle: { color: getChartAxisColor() } },
          },
          userAxis,
        ),
        series: mergedSeries,
        ...userRest,
      }
    }
  
    async ngAfterViewInit(): Promise<void> {
      if (typeof window === 'undefined' || !this.chartEl?.nativeElement) return
      const [{ use }, { CanvasRenderer }, { ThemeRiverChart: EChartsThemeRiverChart }, comps] = await Promise.all([
        import('echarts/core'),
        import('echarts/renderers'),
        import('echarts/charts'),
        import('echarts/components'),
      ])
      use([
        CanvasRenderer,
        EChartsThemeRiverChart,
        comps.SingleAxisComponent,
        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'])) {
        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/theme-river/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/theme-river.json

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