Alternative to detailinit event in Angular 2 Kendo grid - kendo-ui-angular2

Question

In the Angular 2 Kendo grid, I need to show additional info in each cell when the user opens the detail template.
In the Kendo Grid for jQuery I could use the detailinit (http://docs.telerik.com/kendo-ui/api/javascript/ui/grid#events-detailInit) event to accomplish what I need, however, there is no such event in the Angular2 component.
<kendo-grid-column>
<template kendoCellTemplate let-dataItem let-rowIndex="rowIndex">
{{rowIndex}}
<div *ngIf="????">
Need to show this text when detail template is visible
and hide when it's hidden
</div>
</template>
</kendo-grid-column>
<template kendoDetailTemplate let-dataItem>
<section *ngIf="dataItem.Category">
<header>{{dataItem.Category?.CategoryName}}</header>
<article>{{dataItem.Category?.Description}}</article>
</section>
</template>
Here is an example what I need (please see the text in the cells).

Answer 1

At this time, the Angular 2 grid does not provide information whether the detail template is expanded or not. Feel free to suggest this as a feature request.
HACK: To hack around this limitation, you can infer the expanded state from the HTML.
See this plunkr.
private icons(): any[] {
const selector = ".k-master-row > .k-hierarchy-cell > .k-icon";
const icons = this.element.nativeElement.querySelectorAll(selector);
return Array.from(icons);
}
private saveStates(): void {
this.states = this.icons().map(
(icon) => icon.classList.contains("k-minus")
);
}
private isExpanded(index): bool {
return this.states[index] || false;
}
While this works, it is far from ideal, and goes against the Angular philosophy, and may break upon rendering changes.