Angular2 递归树展开所有 [英] Angular2 recursive tree expand all

问题描述

我有递归树组件，我想在从父组件单击时展开所有节点，我该怎么做?plunker 中的更多详细信息.

I have recursive tree component and I would like to expand all nodes on click from parent component, how can I do this? More details in plunker.

Plunker

我说的是这个方法:

   expandAll(){
    console.log("expanded all");
  }

推荐答案

过了一会儿我想我明白了.我刚刚在 TreeComponent 中添加了一个 @Input() :

After a while I guess I figure it out. I just added one more @Input() in TreeComponent:

@Input() expandAll: boolean;

并将*ngIf递归条件替换为:

[hidden]="(!expanded[i] && !expandAll) || (expanded[i] && expandedAll)"

它需要做更多的工作(折叠所有内容并没有按照它应该的方式工作)，但它可以按照我想要的方式工作.

Its need a bit more work (collapsing all doesnt work that how it should), but it works that how I wanted.

Plnker

这篇关于Angular2 递归树展开所有的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！