in src/draft-components/tree-actions/tree-actions.tsx [280:306]
private onItemKeyDown(event: KeyboardEvent, item: TreeItem, itemID: string) {
const isExpanded = this.expandedItems.get(item);
const action = getTreeActionFromKey(event, item, isExpanded, itemID.length);
switch (action) {
case TreeActions.First:
case TreeActions.Last:
case TreeActions.Next:
case TreeActions.Previous:
case TreeActions.UpLevel:
const newID = this.getUpdatedID(itemID, action);
if (typeof newID === 'string') {
this.onItemChange(newID);
this.callFocus = true;
}
break;
case TreeActions.Close:
this.collapseChildren(item, itemID);
break;
case TreeActions.Open:
this.expandChildren(item, itemID);
break;
case TreeActions.Select:
item.onClick && item.onClick(item);
break;
}
}