Cannot run TWO QListWidget in same function

[AnneRanch]

The attached TEST code snippet will not update TWO QListWidget in same function.

What is the reason for such behavior?

Is there a reasonable way to make it work ?

update and sleep does not work

#ifdef BYPASS
ui->list_2->insertItem(1,itemString);
ui->list_2->update();
//ui->list_2->insertItem(1,item);
ui->list_2->addItem(item);
ui->list_2->update();
#endif
//sleep(5);
// original add to bluetooth devices found list
ui->list->addItem(item);
ui->list->update();

[JonB]

@AnneRanch
The update()s won't have any visible effect. You will see the updates as & when you allow Qt to return to its event loop. If you uncomment the sleep(5) you will not see any update during the sleep. You should never use sleep() in a Qt UI application.