How to change the cell text color in a QTableView?

[vRltwE]

I've tried this (without success):


ui->tableView->model()->setData(ui->tableView->model()->index(5, 5, QModelIndex()), QVariant(QColor(Qt::red)), Qt::DecorationRole);

Thanks in advance.

[norm b]

How to change the cell text color in a QTableView

Use: Qt::ForegroundRole - http://qt-project.org/doc/qt-5.0/qtcore/qt.html#ItemDataRole-enum

[vRltwE]

Qt::ForegroundRole also doesn't work, even Qt::BackgroundColorRole doesn't work. There is anything else to be done? May be some kind of update?

The model is a QSqlTableModel.

[norm b]

The model is a QSqlTableModel.

In that case you'll either have to subclass or use a delegate.

From the Qt5 source code:

QVariant QSqlTableModel::data(const QModelIndex &index, int role) const
{
    Q_D(const QSqlTableModel);
    if (!index.isValid() || (role != Qt::DisplayRole && role != Qt::EditRole))
        return QVariant();
. . .

http://qt.gitorious.org/qt/qtbase/blobs/stable/src/sql/models/qsqltablemodel.cpp#line470

[vRltwE]

Ok, something is working now. Here is what it becomes

QVariant MySqlTableModel::data(const QModelIndex &index, int role) const
{
    QVariant value = QSqlTableModel::data(index, role);
    if (role == Qt::TextColorRole && index.column() == 1)
    {
//        double d = value.toDouble();
//        if(d > 0)
            return QVariant::fromValue(QColor(Qt::blue));
    }
    return value;
}

Next step is to check the value, like in the commented lines. Which approach could be taken for that?

Thanks in advance.

[vRltwE]

It seems that the value could be retrieved with

double d = this->record(index.row()).value(index.column()).toDouble();

[norm b]

try this:

QVariant MyTableModel::data(const QModelIndex &index, int role) const {
    if (role == Qt::ForegroundRole && index.column() == 1)   {  // notice that Qt::TextColorRole is deprecated
        QVariant value = QSqlTableModel::data(index, Qt::DisplayRole);
        QVariant value = index.data(); // the data is in DisplayRole
        double d = value.toDouble();
        if(d > 0)
            return Qt::blue; //QVariant::fromValue(QColor(Qt::blue));
    }
    return QSqlTableModel::data(index, role); // forward everthing else to the base class
}

Edit: Changed line 3 above. Haven't used Qt in a while. The old code does work.