Expert
Re: QTableWidgetItem --> Subclassing/Extanding the item informations
To start with data() will be sufficient for read-only table, if editing is required then setData() has to be implemented. Role here is Qt::ItemDataRole, all the item specific data that is hidden from the table can be stored in Qt::UserRole + 1, 2, 3.. etc.
When you know how to do it then you may do it wrong.
When you don't know how to do it then it is not that you may do it wrong but you may not do it right.
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