angular8 - 如何以角度触发ag-grid上的firstDataRendered？

Question

我的组件有获取数据的输入我用 firstDataRendered 选择第一行。问题是当输入数据发生变化时网格不会触发事件如何根据我的输入更改触发网格事件？

 <ag-grid-angular
  #agGrid
  class="ag-theme-alpine"
  style="width: 100%; height: 500px"
  [rowData]="flights"
  [columnDefs]="columnDefs"
  [rowSelection]="'single'"
  (gridReady)="onGridReady($event)"
  (firstDataRendered)="onFirstDataRendered($event)"
>
</ag-grid-angular>

import {
  Component,
  Input,
  OnChanges,
  OnInit,
  SimpleChanges,
} from '@angular/core';
import { Flight } from './model/flight.interface';

@Component({
  selector: 'app-worker-flights-list',
  templateUrl: './worker-flights-list.component.html',
  styleUrls: ['./worker-flights-list.component.css'],
})
export class WorkerFlightsListComponent implements OnInit, OnChanges {
  @Input() flights: Flight[] = [];
  gridApi: any;
  rendered: boolean;
  columnDefs = [
    { headerName: 'Flight Number', field: 'num' },
    { headerName: 'Origin', field: 'from' },
    { headerName: 'Origin Date', field: 'from_date' },
    { headerName: 'Destination', field: 'to' },
    { headerName: 'Destination Date', field: 'to_date' },
  ];
  constructor() {}
  ngOnChanges(changes: SimpleChanges): void {
    if (changes['flights'] && this.rendered) {
      // this.gridApi.api.getDisplayedRowAtIndex(0).setSelected(true);
    }
  }

  ngOnInit(): void {}
  onGridReady(grid: any): void {
    debugger;
    this.gridApi = grid;
  }
  onFirstDataRendered(params: any): void {
    this.rendered = true;
    this.gridApi.api.getDisplayedRowAtIndex(0).setSelected(true);
  }
}

Answer 1

firstDataRendered 事件只会在第一次 呈现数据时触发，而不是每次呈现或更新数据时触发。查看事件定义 here .

一个解决方案是像这样利用 rowDataChanged 事件:

onRowDataChanged(params: any): void {
    this.rendered = true;
    params.api.getDisplayedRowAtIndex(0).setSelected(true);
  }

查看演示 here