QtableWidget VerticalHeader colour depending on row content

[f222]

Hello,

The example shown are anonymized but the logic is the one I used.
I currently have a QTableWidget with 2 columns (first one is the name of a book and the second one its price) and a header whose colour depends on the books price. It is populated as follows:

    int row {};
    for (Book const *book : qAsConst(booksList))
    {
        table->insertRow(row);

        table->setVerticalHeaderItem(
            row,
            getColorizedCell(row, book->price)
        );

        table->setItem(row, 0, getNewCell<QString>(book->name));
        table->setItem(row, 1, getNewCell<double>(book->price));

        row++;
    }

• getColorizedCell creates a QTableWidgetItem containing first param as text and sets its textColor depending on the second param.
• getNewCell creates a QTableWidgetItem and sets its DisplayRole Data to the param sent.

This works well until I enabled sorting (setSortingEnabled(true)) on the table: when I sort my table the rows are sorted but the vertical header colour doesn't follow the sorting.

Is there anyway to make this work natively with the QTableWidget or should I try to find a way to do this using a QTableView/Model ?

[Axel Spoerl]

QTableWidget is a convenience class, providing an easy way to implement a table with basic features. The implementation above will apply the right colors once, when the QTableWidget is populated. It won't change if the data is shuffled around.

For that purpose, I recommend to implement a QTableView with a custom model, inheriting from QAbstractTableModel. The model's data() override has to return a QVariant for different roles. The minimum requirement is DisplayRole, which has to contain the data to be displayed in the cell.
The DecorationRole is what you're looking for to color a cell according to its content.