How can I resize QMessageBox?

Question

I have a QMessageBox which I\'d like it to be bigger. It\'s a simple QMessageBox with two standard buttons, Ok and Cancel. The problem is that it i

Answer 1

Inspired by the "inspect the Qt source code and adapt" approach, this worked for me with Qt 5.12:

if (auto grid = dynamic_cast(msgBox.layout())) {
    if (auto text = grid->itemAtPosition(0, grid->columnCount() - 1); text && text->widget()) {
        text->widget()->setFixedWidth(500);
    }
}

Keep in mind, of course, that this will break if ever they change the way they do layouts of QMessageBox.