How to add a parameter to a slot

Hello,

This is the first time I use Qt and I need an advice to perform the following task.
With this loop, I display a combobox on each column of the first row of my QTableWidget.

Code:

---

for (int col=0 ; col <= colonnes ; ++col)
        {
        	QComboBox *moncombo = new QComboBox;
        	moncombo->addItems(PL_variables);
        	TableW->setCellWidget(0, col, moncombo);	
        	connect(moncombo, SIGNAL(activated(int)),this, SLOT(associate(int)));
        }

---

With connect(moncombo, SIGNAL(activated(int)),this, SLOT(associate(int))); I can transmet the index of the combo to the slot.

My problem is that I also have to transmet the number of the column on which the signal had been sent.
I guess I should to use the horizontalHeader function or something like that, but I don't really know how to do this.

Thanks

You could use QSignalMapper for this.

Thanks for your quick answer Marcel. I didn"t know this class yet, I read the documentation right now...

It would probably be wiser to use a custom delegate instead of cell widgets. It'll get awfully slow if you have more than 10 of them.

Thank you for your advise Wysota. I'm currently learning Qt and custom delegates is the next chapter for me :o Normaly, they are only 8 of them, so it's not to slow to execute.

I could finaly manage to retrieve the number of column as follow :

Code:

---

for (int col=0 ; col <= colonnes ; ++col)
        {
            QComboBox *moncombo = new QComboBox;
            moncombo->addItems(PL_variables);
            moncombo->setObjectName(QString::number(col));   // the name of my combo is the number of my column
            TableW->setCellWidget(0, col, moncombo);    
            connect(moncombo, SIGNAL(activated(int)),this, SLOT(associate(int)));
        }

---

The slot

Code:

---

void MainWindow::associate(int index)
{...
int c = sender()->objectName().toInt();      
...}

---

Regarding to the documentation, it's not a very correct way to do this... That's why I try to implement another solution using QSignalMapper.

Thanks for your advices...