Calculating subtotal in Qtablewidget - delegates

Question

i have Qtablewidget i have implemented a delegate for that table
like so : Num(default) | item(Qcombobox) | -qty-(QdoubleSpinBox)| Price(QdoubleSpinBox)|subtotal (QdoubleSpinBox)
i want to calculate subtotal( qty * price ) for each row using delegate, but really i don't know how to emit data from delegate
i tried this from my custom delegate
QWidget *customTableSellDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
if(!index.isValid())
return QStyledItemDelegate::createEditor(parent,option,index);
int col= index.column();
if(col == 1)
{
QComboBox *comboboxEditor = new QComboBox(parent);
return comboboxEditor;
}
// col3
else if(col ==2 || col ==3 || col ==4 || col == 5 || col == 6 || col == 7)
{
QDoubleSpinBox *doubleSpinBoxEditor = new QDoubleSpinBox(parent);
doubleSpinBoxEditor->setInputMethodHints(Qt::ImhFormattedNumbersOnly);
doubleSpinBoxEditor->setRange(0.000000,999999999);
doubleSpinBoxEditor->setSuffix(" D.A");
doubleSpinBoxEditor->setDecimals(2);
doubleSpinBoxEditor->setFrame(false);
if(col == 2 || col == 3)
{
connect(doubleSpinBoxEditor,SIGNAL(valueChanged(double)),this,SLOT(testSlot(double)));
}
return doubleSpinBoxEditor;
}else{
return QStyledItemDelegate::createEditor(parent,option,index);
}
}
so , what's the best way to do this ?

Answer 1

after thinking i get the solution her is the code
Note: this is depand in my logic , you can change it as you want
QTableWidgetItem *item= NULL;
for(int row=0; row < ui->tableWidget->rowCount(); row++)
{
for (int col=0; col< ui->tableWidget->columnCount(); col++)
{
item = new QTableWidgetItem;
ui->tableWidget->setItem(row,col,item);
}
}
for(int row =0; row < ui->tableWidget->rowCount(); row++)
{
for(int col=0; col < ui->tableWidget->columnCount(); col++)
{
if(row != 0)
ui->tableWidget->item(row,col)->setFlags(Qt::NoItemFlags);
else{
if(col == 0 || col == 4 || col == 5 || col == 7 || col == 6)
ui->tableWidget->item(row,col)->setFlags(Qt::NoItemFlags);
}
}
}