All files / components/chart-examples-gauge chart-examples-gauge.component.ts

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import { BreakpointObserver, Breakpoints } from '@angular/cdk/layout';
import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
import { first, map, switchMap, timer } from 'rxjs';
 
import { IGaugeChartDataNode, IGaugeChartOptions } from '../../interfaces/gauge-chart.interface';
 
/** Gauge chart example. */
@Component({
  selector: 'app-chart-examples-gauge',
  templateUrl: './chart-examples-gauge.component.html',
  styleUrls: ['./chart-examples-gauge.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush,
  standalone: false,
})
export class AppChartExamplesGaugeComponent {
  private readonly breakpointObserver = inject(BreakpointObserver);
 
  /** The chat values. */
  public value = {
    first: 80,
    second: 75,
    third: 65,
  };
 
  /** The chart data. */
  private get chartData() {
    const chunks = {
      first: 10,
      second: 100,
    };
    const data: {
      first: IGaugeChartDataNode[];
      second: IGaugeChartDataNode[];
    } = {
      first: Array.from(Array(chunks.first).keys()).map(item => {
        const mod = 10;
        return {
          key: 'value',
          y: (item + 1) * mod,
        } as IGaugeChartDataNode;
      }),
      second: Array.from(Array(chunks.second).keys()).map(item => {
        return {
          key: 'value',
          y: item + 1,
        } as IGaugeChartDataNode;
      }),
    };
    return data;
  }
 
  /**
   * Example gauge chart options.
   */
  private get chartOptions() {
    const options: {
      first: Partial<IGaugeChartOptions>;
      second: Partial<IGaugeChartOptions>;
      third: Partial<IGaugeChartOptions>;
      fourth: Partial<IGaugeChartOptions>;
    } = {
      first: {
        chartTitle: 'Example gauge chart 1',
      } as Partial<IGaugeChartOptions>,
      second: {
        chartTitle: 'Example gauge chart 2',
        showLabels: false,
      } as Partial<IGaugeChartOptions>,
      third: {
        chartTitle: 'Example gauge chart 3',
        showLabels: false,
        showTooltips: false,
        defaultColor: 'red',
      } as Partial<IGaugeChartOptions>,
      fourth: {
        chartTitle: 'Example gauge chart 2',
        showLabels: false,
        valueFontSize: 30,
        padRad: 0,
      } as Partial<IGaugeChartOptions>,
    };
    return options;
  }
 
  /** The breakpoint observer stream. */
  private readonly breakpoint$ = this.breakpointObserver
    .observe([Breakpoints.XSmall, Breakpoints.Small, Breakpoints.Medium, Breakpoints.Large, Breakpoints.XLarge])
    .pipe(map(result => Object.keys(result.breakpoints).find(item => result.breakpoints[item]) ?? 'unknown'));
 
  /** The chart configuration stream. */
  public readonly chartConfig$ = this.breakpoint$.pipe(
    switchMap(() => {
      const timeout = 100;
      return timer(timeout).pipe(
        first(),
        map(() => ({ data: this.chartData, options: this.chartOptions })),
      );
    }),
  );
}