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Initialize cdk-tree component datasource in the constructor #15

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Merged
merged 1 commit into from
Jun 1, 2023
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Initialize cdk-tree component datasource in the constructor #15

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13 changes: 8 additions & 5 deletions src/app/angular/cdk-tree/cdk-tree.component.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import { ArrayDataSource } from '@angular/cdk/collections';
import { ArrayDataSource, DataSource } from '@angular/cdk/collections';
import { FlatTreeControl } from '@angular/cdk/tree';
import { Component } from '@angular/core';
import { ExampleFlatNode } from './cdk-tree.model';
Expand All @@ -11,14 +11,17 @@ import { CdkTreeService } from './cdk-tree.service';
})
export class CdkTreeComponent {
static selector = 'appCdkTree';
private readonly treeData: ExampleFlatNode[] = this.cdkTreeService.getTreeData();
treeControl = new FlatTreeControl<ExampleFlatNode>(
private readonly treeData: ExampleFlatNode[];
readonly treeControl = new FlatTreeControl<ExampleFlatNode>(
node => node.level,
node => node.expandable
);
dataSource = new ArrayDataSource(this.treeData);
readonly dataSource: DataSource<ExampleFlatNode>;

constructor(private cdkTreeService: CdkTreeService) {}
constructor(private cdkTreeService: CdkTreeService) {
this.treeData = this.cdkTreeService.getTreeData();
this.dataSource = new ArrayDataSource(this.treeData);
}

hasChild = (_: number, node: ExampleFlatNode) => node.expandable;

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