unable to focus either on pushBUtton or tableview in same .ui file

[Jayachandra Reddy Kalukurthi]

Hi...In my code i have diff dialogs, while moving from one dialog to another using remote for RDK set top box am facing issue,code is
(in dialog1)
void dialog1::iRkeypressevent(int key)
{
if(key==some key integer)
{
dialog2=new dialog();//calls constructor
dialog1->hide();
dialog2->showNormal();
}
}
(in dilaog2)
in constructor i put

ui->pushButton->setFocus();

void dialog2::iRkeypressevent(int key)
{
if(key==some int key)
{
QModelIndex index = ui->tableView->model()->index(int,int);
ui->tableView->setCurrentIndex(index);
}
}
when entering from dailog1 to dialog2, screen is getting stuck and no operation is appearing on screen i donno is it timer issue or thread issue.

in dialog2.ui i have pushbuttons as well as table view so using above code i can able to focus on either one of them only for remote key mapping. but based on condition i need to focus on different widgets like table view or pushbuttons. focus is happenig but using stylesheet hover i can able to identify which item is selected, that hover is not updating for remote key mapping.

Thanks......!