4

I installed and imported angular tree component and tried setting it up using the basic example provided following the steps in https://angular2-tree.readme.io/

But unfortunately I only see the root node and without expand. Posting the code can someone just see off the bat if anything is wrong? Please help me understand the error I oviously am not able to see.

Module:

import { NgModule } from '@angular/core';
import { TreeModule } from 'angular-tree-component';

@NgModule({
  imports: [
    TreeModule
  ],
  declarations: [],
  providers: []
})
export class CourseCreationModule { }

Component:

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params } from '@angular/router';

@Component({
  selector: 'app-container',
  templateUrl: './container.component.html',
  styleUrls: ['./container.component.css']
})
export class ContainerComponent implements OnInit {
  tree: any;

  constructor() { }

  getCourseDetails() {
      this.createLessonTree();
  }

  createLessonTree() {
    this.tree = [
      {
        id: 1,
        name: 'root1',
        children: [
          { 
            id: 2, 
            name: 'child1'
          },
          { id: 3, 
            name: 'child2'
          }
        ]
      },
      {
        id: 4,
        name: 'root2',
        children: [
          { id: 5, name: 'child2.1' },
          {
            id: 6,
            name: 'child2.2',
            children: [
              { id: 7, name: 'subsub' }
            ]
          }
        ]
      }
    ];
  }

ngOnInit() {
this.route.params.subscribe(params => {
  this.courseId = params['id'];
  this.getCourseDetails();
});
}

HTML:

<tree-root [nodes]="tree"></tree-root>

Believe there are no sytax errors as I can see root1 and root2.

Thank you.

Benjamin Gruenbaum
  • 270,886
  • 87
  • 504
  • 504
Prateek Choudhury
  • 302
  • 3
  • 8
  • 21
  • Where are you calling `getCourseDetails()`? – ronenmiller Sep 25 '17 at 12:29
  • I found a solution to this issue in this post: https://stackoverflow.com/questions/47642137/angular-2-tree-only-shows-root-nodes?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa – Zulukas May 18 '18 at 19:09

3 Answers3

6

Added @import '~angular-tree-component/dist/angular-tree-component.css'; to the src/styles.css file and worked.

coder
  • 8,346
  • 16
  • 39
  • 53
Daniel Mariano
  • 61
  • 1
  • 2
  • or you can add this to your angular.json styles property "styles": ["./node_modules/angular-tree-component/dist/angular-tree-component.css","src/styles.css"] – G-V Oct 16 '19 at 23:05
1

I believe you need to call getCourseDetails() in your constructor or in ngOnInit() which should be implemented as the class declaration states.

ronenmiller
  • 1,117
  • 15
  • 25
  • That is not required the function gets invoked. As I had said syntax might not be a problem as the tree component is being called and I can see the root nodes being displayed. The problem is the children are not being appended. – Prateek Choudhury Sep 26 '17 at 07:20
  • Why would you see it if you do not invoke the constructing function? – ronenmiller Sep 26 '17 at 08:04
  • Sorry for the confusion have invoked the code from ngOnInit which I havn't added in the code. – Prateek Choudhury Sep 26 '17 at 09:47
  • any solution for this issue! I am facing same – NIrav Modi May 18 '18 at 08:38
  • 1
    @NIrav Modi, check out the solution on https://stackoverflow.com/questions/47642137/angular-2-tree-only-shows-root-nodes?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa I had to include `@import '~angular-tree-component/dist/angular-tree-component.css'; ` to my src/styles.css file to get it to work. – Zulukas May 18 '18 at 19:08
  • I can not see even root nodes. Do you think this will resolve? – NIrav Modi May 21 '18 at 08:14
0

If this issue occurs after migrating to @circlon/angular-tree-component, you should use @import '~@circlon/angular-tree-component/css/angular-tree-component.css' in your src/styles.css. See also: changelog

Brueni92
  • 137
  • 1
  • 9