Tree Chart

Installation

Examples

Props

Schema

Type aliases from this item's source — use them to shape the data you pass in.

interface TreeChartNode {
  name: string
  value?: number
  children?: TreeChartNode[]
  /** Collapse this branch on initial render. */
  collapsed?: boolean
}

Used by

Files installed (3)

• src/app/components/ui/charts/tree-chart/tree-chart.component.ts5.6 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,
  } from '../use-chart-theme'
  
  export interface TreeChartNode {
    name: string
    value?: number
    children?: TreeChartNode[]
    /** Collapse this branch on initial render. */
    collapsed?: boolean
  }
  
  /**
   * Angular port of the UIPKGE TreeChart — orthogonal/radial hierarchies. Standalone, theme-aware. Same inputs as the Vue `TreeChart` (`data`, `layout`, `orient`, `roam`, `height`, `option`).
   */
  @Component({
    changeDetection: ChangeDetectionStrategy.Eager,
    selector: 'ui-tree-chart, [ui-tree-chart]',
    standalone: true,
    host: {
      '[attr.data-slot]': '"tree-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 UiTreeChartComponent implements AfterViewInit, OnChanges, OnDestroy {
    /** Single root node (React/Vue `data`). Optional so the chart renders empty before data arrives. */
    @Input() data?: TreeChartNode
    /** orthogonal | radial. Default orthogonal. */
    @Input() layout: 'orthogonal' | 'radial' = 'orthogonal'
    /** LR | TB | RL | BT, or radial (React/Vue alias for `layout="radial"`). Default LR. */
    @Input() orient: 'LR' | 'TB' | 'RL' | 'BT' | 'radial' = 'LR'
    @Input() roam = false
    @Input() height: number | string = 380
    @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)
    }
  
    /** Build the merged ECharts option (pure — no DOM needed, unit-testable). */
    getOption(): Record<string, unknown> {
      const colors = getChartColors()
      const layout = this.layout === 'radial' || this.orient === 'radial' ? 'radial' : 'orthogonal'
      const series = [
        {
          type: 'tree',
          data: this.data ? [this.data] : [],
          layout,
          orient: layout === 'orthogonal' ? this.orient : undefined,
          roam: this.roam,
          symbol: 'circle',
          symbolSize: 10,
          initialTreeDepth: -1,
          top: 16,
          bottom: 16,
          left: layout === 'radial' ? '5%' : 16,
          right: layout === 'radial' ? '5%' : 60,
          label: {
            fontSize: 11,
            color: getChartTextColor(),
            position: layout === 'radial' ? 'inside' : 'right',
            verticalAlign: 'middle',
            align: layout === 'radial' ? 'center' : 'left',
            distance: 6,
          },
          leaves: {
            label: { position: layout === 'radial' ? 'inside' : 'right' },
          },
          lineStyle: { color: getChartAxisColor(), width: 1.5, curveness: 0.5 },
          emphasis: { focus: 'descendant' },
          expandAndCollapse: true,
          itemStyle: { color: colors[0], borderColor: colors[0] },
        },
      ]
      const userOption: Record<string, any> = this.option ?? {}
      const { series: userSeries, tooltip: userTooltip, ...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 },
          ...(typeof userTooltip === 'object' && userTooltip !== null ? userTooltip : {}),
        },
        // ECharts' tree series needs a root node; with no data yet (e.g. still loading) it throws.
        series: this.data ? mergedSeries : [],
        ...userRest,
      }
    }
  
    async ngAfterViewInit(): Promise<void> {
      if (typeof window === 'undefined' || !this.chartEl?.nativeElement) return
      const [{ use }, { CanvasRenderer }, { TreeChart: EChartsTreeChart }, comps] = await Promise.all([
        import('echarts/core'),
        import('echarts/renderers'),
        import('echarts/charts'),
        import('echarts/components'),
      ])
      use([CanvasRenderer, EChartsTreeChart, comps.TooltipComponent])
      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['layout'] || changes['orient'])) {
        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/tree-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/tree-chart.json

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