How to disable the option to deselect a row on TurboTable component?

Question

So I have a table with data that gets populated throughout the use of the application. When a user clicks on a row, the row is highlighted and that row's data is populated beneath the table. I just want to disable the option of the user to deselect a row (this is done by clicking on the row again).

The code:

<p-table #purchaseOrdersList
         [value]="purchaseOrders"
         selectionMode="single"
         [(selection)]="selectedPurchaseOrder"
         (onRowSelect)="onRowSelect($event)"
          >

<ng-template pTemplate="header">
    <tr>
      <th class="supplier-number-col">Supplier Number</th>
      <th class="supplier-name-col">Supplier Name</th>
      <th class="supplier-phone-col">Supplier Phone</th>
    </tr>
  </ng-template>

  <ng-template pTemplate="body" let-purchaseOrder>
    <tr [pSelectableRow]="selectedRow">
      <td>{{purchaseOrder.supplierNumber}}</td>
      <td>{{purchaseOrder.supplierName}}</td>
      <td>{{purchaseOrder.supplierPhoneNumber}}</td>
    </tr>
  </ng-template>

</p-table>

Answer 1

I was having the exact same question, and came up with two solutions: a very simple one, and a slightly more complex solution:

Simple solution:

tr.ui-state-highlight {
    pointer-events: none;
}

This will prevent any selected row from being clicked again, thereby preventing deselection.

However, this will also prevent double-clicking the row. So if you need double-clicking, use the following solution:

Slighty more complex solution:

Add the following attribute to the p-table: (onRowUnselect)="cancelUnselect($event)", and then in your component do:

private _selectedPurchaseOrder: any;

get selectedPurchaseOrder() {
    return this._selectedPurchaseOrder;
}

set selectedPurchaseOrder(value: any) {
    if (value) {
        this._selectedPurchaseOrder = value;
    } else {
        this.purchaseOrdersList.selection = this._selectedPurchaseOrder;
    }
}

cancelUnselect(event) {
        this.purchaseOrdersList.selection = event.data;
}

This will prevent deselection of a row in all cases, and double-clicking is still possible.