Return a QPushButton from a QButtonGroup by id?

[lansing]

I have a group of QPushButton and I added them to a QButtonGroup with id. I want to programatically setcheck one of the button. In order to do that, I need to get that button first, but how do I get it by id?

[Bonnie]

How about reading the doc first :)
QAbstractButton *QButtonGroup::button(int id) const
Or do you just not know how to cast a QAbstractButton * to QPushButton *?

[lansing]

@Bonnie

I did look over the doc for 10 minutes, I just missed it

[qwasder85]

@lansing Set the topic as solved, please.

[lansing]

For some reason I couldn't check the button. I have four buttons in the group with value -2, 0, 1, 2. The target button was returned but setCheck(true) didn't do anything. I checked the checkedId of the buttonGroup, it always returns -1 when this event was triggered.

    qDebug() << "checked id is: " << ui->buttonGroup->checkedId();

    QAbstractButton * targetBtn= ui->buttonGroup->button(2);

    if (targetBtn!= nullptr) {       
        blockSignals(true);
        targetBtn->setChecked(true);
        blockSignals(false);
    }

[Bonnie]

@lansing Are they checkable? Have you called setCheckable(true)?

[lansing]

@Bonnie

Thank you that fixed it. I also have all the buttons set to "autoDefault" which compound the problem. Now I turned off all autoDefault and make them all checkable and they're working properly.