There is a QTreeView::setFirstColumnSpanned() method that will do what you want, I think.
Guru
Re: Groups inside QTreeView (using QAbstractItemModel)
There is a QTreeView::setFirstColumnSpanned() method that will do what you want, I think.
<=== The Great Pumpkin says ===>
Please use CODE tags when posting source code so it is more readable. Click "Go Advanced" and then the "#" icon to insert the tags. Paste your code between them.
gabo (11th December 2020)
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