Finding a layout when knowing its name in Qt

Question

In this post, @cgmb mentioned that :

The parent of a `QWidget` must be a `QWidget`. `QLayout` is not a `QWidget`.

Layouts exist to move and resize the children of a `QWidget`. 
Though you may add child widgets by making calls on the layout, ultimately, 
    their parent will be the `QWidget` that the layout resides on.

For example, using findChild() like this to find a QLayout will return a nullptr:

QVBoxLayout *keyLayout = inputFieldGroupBox->findChild<QVBoxLayout*>("keyBoxLayoutCea", Qt::FindChildrenRecursively);

As such, I've been forced to use itemAt() to manually search for the layout:

QVBoxLayout *keyLayout = dynamic_cast<QVBoxLayout*>(firstHoriField->itemAt(3)->layout());

(firstHoriField is a layout in which keyLayout locates in, and inputFieldGroupBox is a QGroupBox which firstHoriField locates in)

Is there any efficient/less prone to bug method which can be used to find a layout (knowing its name), because from the code above, it could be seen that the itemAt() method is rather bruteforce-y, and if for some reason I change the indexes (for instance from 3->2), the program wouldn't run.

Check [this reply](https://stackoverflow.com/a/3077307/1559401). — rbaleksandar, May 21 '21 at 11:55
@rbaleksandar Hmm, from that I can deduce that `itemAt()` is the most feasible way of find layouts currently? — , May 21 '21 at 12:02

Finding a layout when knowing its name in Qt

0 Answers0