Myujth

I'm trying to track changes made to the tree nodes data source.
Each node has a selected property which reflects the node selection status, every time I select a node, I need to emit the selection to another component, which will build another tree according to that selection.

I tried with OnChanges interface, but I read later in the doc that ngOnChanges is called only when data is set again.

This is my simple template:

 <clr-tree-node [(clrSelected)]="selected" >
 Asset
 <ng-template [clrIfExpanded]="true">
 <clr-tree-node *ngFor="let asset of assets" [(clrSelected)]="asset.selected">
 asset.type
 </clr-tree-node>
 </ng-template>
 </clr-tree-node>

Is there a tree node event I can bind I can use to emit (with EventEmitter) the changed data? For example onSelectionChange, or onChange or something else?
Or any other mechanism?

Thanks in advance,
Alex.

As far as I can see, you are already binding to that event. Just use the long form of the two way binding:

template.html

<clr-tree-node [clrSelected]="selected" (clrSelectedChange)="changeSelected($event)">
 Asset
 <ng-template [clrIfExpanded]="true">
 <clr-tree-node 
 *ngFor="let asset of assets 
 [clrSelected]="asset.selected"
 (clrSelectedChange)="changeSelectedAsset(asset, $event)"
 >asset.type</clr-tree-node>
 </ng-template>
</clr-tree-node>

component.ts

@Component(...)
export class MyComp 
 @Output public structureChange:EventEmitter<...> = new EventEmitter<...>();

 public changeSelected(data):void 
 this.selected = data;
 this.structureChange.emit(data);
 
 public changeSelectedAsset(asset, data):void 
 asset.selected = data;
 this.structureChange.emit(this.selected);
 

Something like this. Of course, add datatypes wherever possible.