Change focus/selection color for single cell in QTableView

[jmalicke]

I have a table that renders a cell background green or red depending on its value. Here's a picture:

Capture.png

When I select/focus the table row, the green color is lost:

Capture2.png

I would like to keep a greenish color only for the single cell on focus/selection. Perhaps I would make it a slightly darker green color. How would I go about doing this?

Here is my code that renders the cell green or red:

QVariant ExternalDataSourcesTableModel::data(const QModelIndex & index, int32_t role) const
{
  ...
 
  if (role == Qt::BackgroundRole)
  {
    if (index.column() == static_cast<int>(Column::STATUS)) {
      if (externalDataSource.getStatus(reason) == "OK") {
        return QColor(Qt::green);
      }
      else {
        return QColor(Qt::red);
      }
    }
  }
 
  ...
}

QVariant ExternalDataSourcesTableModel::data(const QModelIndex & index, int32_t role) const
{
  ...

  if (role == Qt::BackgroundRole)
  {
    if (index.column() == static_cast<int>(Column::STATUS)) {
      if (externalDataSource.getStatus(reason) == "OK") {
        return QColor(Qt::green);
      }
      else {
        return QColor(Qt::red);
      }
    }
  }

  ...
}

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[ChrisW67]

You create a QStyledItemDelegate subclass that implements paint() the way you want and then attach it to the column of the view with QAbstractItemView::setItemDelegateForColumn()