Adding QComboBox to QTableWidget very slow

[munna]

Hi,

I read a text (csv) file to populate a QTableWidget. The first row contains QComboBox in all the columns. I see that when I do not add any combo box, the table is populated very quickly whereas when I add combo box, it takes a very long time for the table to get populated.

Is there a solution to this?

Here is the code:

void TextFileImporter::importData(const QStringList &lineList)
{
	dataTable->setRowCount(lineList.count()+1);
 
	for(int i = 0; i < lineList.count(); ++i){
		QStringList columnList = lineList.at(i).split(",");
		for(int j = 0; j < columnList.count(); ++j){
			if(dataTable->columnCount() == 0){
				dataTable->setColumnCount(columnList.count());
			}
			if(i == 0){
				dataTable->addFieldCombo(j);//If comment this line then things are very fast
			}
			QString cellString = columnList.at(j);
			cellString.remove("\"");
			dataTable->insertItemAt(i+1,j,cellString);
		}
	}
}
 
void DataTable::addFieldCombo(const int column)
{
	QComboBox *fieldCombo = new QComboBox(this);
        populateFieldCombo(fieldCombo);//This line is not making much a difference
 
	setCellWidget(0,column,fieldCombo);
}

void TextFileImporter::importData(const QStringList &lineList)
{
	dataTable->setRowCount(lineList.count()+1);

	for(int i = 0; i < lineList.count(); ++i){
		QStringList columnList = lineList.at(i).split(",");
		for(int j = 0; j < columnList.count(); ++j){
			if(dataTable->columnCount() == 0){
				dataTable->setColumnCount(columnList.count());
			}
			if(i == 0){
				dataTable->addFieldCombo(j);//If comment this line then things are very fast
			}
			QString cellString = columnList.at(j);
			cellString.remove("\"");
			dataTable->insertItemAt(i+1,j,cellString);
		}
	}
}

void DataTable::addFieldCombo(const int column)
{
	QComboBox *fieldCombo = new QComboBox(this);
        populateFieldCombo(fieldCombo);//This line is not making much a difference

	setCellWidget(0,column,fieldCombo);
}

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In the debug window I get the following message (lots of time)

QComboBox::setProperty("text", value) failed: property invalid, read-only or does not exist

Any Idea?