[Solved] Qt - How to get parent of QTreeWidgetItem

[needhelp_gh]

Hi,

Does anyone know how to get parent of a QTreeWidgetItem child?

Thanks!!

[lgeyer]

What's wrong with the existing QTreeWidgetItem::parent() method?

[needhelp_gh]

Yes...I suppose I worded my question incorrectly, but thank you.

I meant how can I return the string of the parent in C++ as that method returns a QTreeWidgetItem.

[DerManu]

treeWidgetItem->parent()->text() ?

[needhelp_gh]

:) Thanks, DerManu again!

I tried:

treeWidgetItem->parent()->text(column)

Works!!

[andre]

When dereferencing a pointer, it is wise to check that the pointer is valid first. In your case, the result of parent() may be 0, and then the ->text(column) call would cause a crash.

[needhelp_gh]

Thank you, Andre. I also noticed that it would crash if the item was the uppermost item & had no parent.

I added this check to my c++ code (might be useful for anyone who comes across this in the future):

@    QString cur = item->text(column);
int root = ui->treeWidget->indexOfTopLevelItem(item);

if ( root.parent() != None ) { // not top most
    QString parent = item->parent()->text(column);
}@

[DerManu]

Are you sure this case isn't covered by what Andre said? I would expect parent() to simply return 0 on top level items (but I haven't checked that).