Making Table cell as a combobox?

Hi,

I was facing an issue in designing one screen where in I need to display a table and each table cell is a combo and the values in them need to be populated from a Modal view.
Approach that I had followed is … Creating a QTableView widget and displaying values from a Modal.
But I am struck – ‘how to make each cell of table as a comb box and the populate each combo with a values from Modal’?

help me out.

Hi,
you need to use a custom delegate. In its createEditor()-method, return a new QCombobox.
Possibly you will need persistend editors in your table, otherwise the combobox will only show up if the users edits the cell.

Ginsengelf

i have written my custom delegate but it just works wwith QTableWidget and not with
QTableView. I need to use QTableView because i want to show data from my Modal.

That's weird since QTableWidget inherits QTableView...
Could you show some code?

That is ok. Got the combobox in table cell using delegate.

But there is a problem when i use my custom model. My custom model is derived from
QAbstract item Model...
When i use this model then only the data is displayed but no combo box is there...
but when i use QStandardItemModel there is combobox as well as data.

help!

How did you implement flags() and data()? Did you return Qt::ItemIsEditable together with other flags in former and did you handle Qt::EditRole in latter?

I have implemented data as

Code:

---

QVariant className::data(const QModelIndex & index, int role) const
{
	if( index.isValid() == false )
		return QVariant();
 
	if( role == Qt::EditRole )
	{
		if( index.internalPointer() )
		{
			int parentRow = ipToRow(index.internalPointer());
			return QString("Cell %3.%1.%2").arg(index.row()).arg(index.column())
				.arg(parentRow);
		}
 
		return QString("Cell %1.%2").arg(index.row()).arg(index.column());
	}

---

and Flags() as

Code:

---

Qt::ItemFlags className::flags( const QModelIndex& idx ) const
{
 
	return Qt::ItemIsEditable;
}

---

but it did not work.

did i do something wrong...?

Quote:

---

Originally Posted by kaushal_gaurav

Code:

---

Qt::ItemFlags className::flags( const QModelIndex& idx ) const
{
 
	return Qt::ItemIsEditable;
}

---

---

This would mean that all items are disabled, thus non-editable. Try something like:

Code:

---

Qt::ItemFlags className::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return 0;
 
    return Qt::ItemIsSelectable|Qt::ItemIsEnabled|Qt::ItemIsEditable;
}

---

yipeee....it works...
thanks buddy..

but how can make it persistent....i have to click the table cell to make it show.

Hi,
use QAbstractItemView::openPersistentEditor.

Ginsengelf