Blinking background cell in a model

Question

Hello cjhuitt

Iám confused about the setData en data methods for my custom role (IsBlinkingRole).
I try different options but every option failled.

bool CustomSqlModel::setData( const QModelIndex& index, const QVariant& value, int role)
{
if (role == IsBlinkingRole && index.column() == 0 && index.isValid()) {
      //What to put here ?

  emit dataChanged(index, index);
 return true;
}
return false;



QVariant CustomSqlModel::data(const QModelIndex& index, int role) const
 {
QVariant value = QSqlTableModel::data(index, role);
if (role == Qt::BackgroundRole && index.column() == 0) {
 QModelIndex testIndex = index.model()->index(index.row(), 0, index.parent());
 if ( index.model()->data(testIndex, Qt::DisplayRole).toInt() == 5)
  return QVariant(QColor(Qt::red));
 else
  return QVariant();
}
return value;

}

 void CustomSqlModel::timerEvent(QTimerEvent *)
      { 
   static bool blinkon = true;
   blinkon = !blinkon;
   int topRow = rowCount();
   int bottomRow = -1;
   for(int i = 0; i < rowCount(); i++) {
 for(int j = 0; j < columnCount(); j++) {
  if(data(index(i, j), IsBlinkingRole).toBool()){
   if(blinkon)
    setData(index(i, j), Qt::red, Qt::BackgroundRole);
   else
    setData(index(i, j), QVariant(), Qt::BackgroundRole);
   if(i < topRow) topRow = i; if(i > bottomRow) bottomRow = i;
  }
 }
}
 if(bottomRow >= 0)
  emit dataChanged(index(topRow, 0), index(bottomRow, columnCount()-1));

}

Thanks cjhuitt for your time and advice.
If i can't solved this then i let the blinking cell for what it is.

First of all my apology for asking three times the same question.
Iám new in stackoverflow.

The problem i have with the setData method wat kind of code i need to put here.
Must i first create a container for storage data ?

Thank in advance.