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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | 1x 2x 2x 2x 15x 2x 3x 3x 2x | import { BreakpointObserver, Breakpoints } from '@angular/cdk/layout';
import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
import { first, map, switchMap, timer } from 'rxjs';
import { IPieChartDataNode, IPieChartOptions } from '../../interfaces/pie-chart.interface';
/** Pie chart example. */
@Component({
selector: 'app-chart-examples-pie',
templateUrl: './chart-examples-pie.component.html',
styleUrls: ['./chart-examples-pie.component.scss'],
changeDetection: ChangeDetectionStrategy.OnPush,
standalone: false,
})
export class AppChartExamplesPieComponent {
private readonly breakpointObserver = inject(BreakpointObserver);
/** The chart data. */
private get chartData() {
return [
{ key: 'one', y: 1 },
{ key: 'two', y: 2 },
{ key: 'three', y: 3 },
{ key: 'four', y: 4 },
{ key: 'five', y: 5 },
{ key: 'six', y: 6 },
] as IPieChartDataNode[];
}
/** The chart options. */
private get chartOptions() {
const options: {
first: Partial<IPieChartOptions>;
second: Partial<IPieChartOptions>;
} = {
first: {
chartTitle: 'Example pie chart 1',
} as Partial<IPieChartOptions>,
second: {
chartTitle: 'Example pie chart 2',
innerRadius: 75,
} as Partial<IPieChartOptions>,
};
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 })),
);
}),
);
}
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