How to remove widget added in runtime?

[jiveaxe]

Hi,
i'm working on a database application; i would like to add the possibility for the user to perform custom query with AND/OR clauses. So i thought to add to my program 2 button, one for adding and one for removing clauses; each clause is a custom widget; the list of clause/widget is stored in a QList. The remove function should delete the last added clause from QList and from gui. My problem is I can't remove widgets from the gui after adding them. Here is some code of a sample application i made for the thread (no database handling):

MainDialog::MainDialog(QWidget *parent)
	:QDialog(parent)
{
	...
	groupBox = new QGroupBox("Clauses");
	...
	groupBoxLayout = new QVBoxLayout(groupBox);
	...
	removeConditionButton->setEnabled(false);
	...
	connect(addConditionButton, SIGNAL(clicked()), this, SLOT(addCondition()));
	connect(removeConditionButton, SIGNAL(clicked()), this, SLOT(removeCondition()));
}
 
void MainDialog::addCondition()
{
	QComboBox *comboBox = new QComboBox;
	groupBoxLayout->addWidget(comboBox);
	list.append(comboBox);
	removeConditionButton->setEnabled(true);
}
 
void MainDialog::removeCondition()
{
	list.removeLast();
	if(list.size() == 0)
		removeConditionButton->setEnabled(false);
}

MainDialog::MainDialog(QWidget *parent)
	:QDialog(parent)
{
	...
	groupBox = new QGroupBox("Clauses");
	...
	groupBoxLayout = new QVBoxLayout(groupBox);
	...
	removeConditionButton->setEnabled(false);
	...
	connect(addConditionButton, SIGNAL(clicked()), this, SLOT(addCondition()));
	connect(removeConditionButton, SIGNAL(clicked()), this, SLOT(removeCondition()));
}

void MainDialog::addCondition()
{
	QComboBox *comboBox = new QComboBox;
	groupBoxLayout->addWidget(comboBox);
	list.append(comboBox);
	removeConditionButton->setEnabled(true);
}

void MainDialog::removeCondition()
{
	list.removeLast();
	if(list.size() == 0)
		removeConditionButton->setEnabled(false);
}

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What have I to add to removeCondition()? Or is there a better solution?

Thanks