how to avoid switch statements in item delegates

[GrahamLabdon]

Hi
I am implementing a Item Delegate for my tree based model.
I need to create a different editor depending upon the item being edited.
At the moment I am using switch statements to decide which editor to supply, but as my model grows so do the switch statements.

QWidget* editor;
 
	QModelIndex parentIndex = index.model()->parent(index);
 
	switch (index.model()->parent(index).row())
	{
		case 0:
		{
			switch (index.row())
			{
				case 0:
				case 1:
				{
					editor = new QLineEdit(parent);
				}
				break;
 
				case 2:
				{
					QStringList list;
					Common::Enumerations::surveyUnits().getDisplayStrings(list);
					editor = new QComboBox(parent);
					((QComboBox*)editor)->addItems(list);
				}
				break;
			}
		}
		break;
 
		case 1:
		{
			editor = new QLineEdit(parent);
			((QLineEdit*)editor)->setValidator(new QIntValidator());
		}
		break;
	}
	return editor;

QWidget* editor;

	QModelIndex parentIndex = index.model()->parent(index);

	switch (index.model()->parent(index).row())
	{
		case 0:
		{
			switch (index.row())
			{
				case 0:
				case 1:
				{
					editor = new QLineEdit(parent);
				}
				break;

				case 2:
				{
					QStringList list;
					Common::Enumerations::surveyUnits().getDisplayStrings(list);
					editor = new QComboBox(parent);
					((QComboBox*)editor)->addItems(list);
				}
				break;
			}
		}
		break;

		case 1:
		{
			editor = new QLineEdit(parent);
			((QLineEdit*)editor)->setValidator(new QIntValidator());
		}
		break;
	}
	return editor;

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Is there a better way to achieve this?

TIA

[ChiliPalmer]

How do you put the data into the model?
If it's a derivative of QAbstractItemModel you could use setData with your own DataRole to save a value from an enum, something like

enum EditorType {
    LineEditEditor,
    ComboBoxEditor,
    ...
}

enum EditorType {
    LineEditEditor,
    ComboBoxEditor,
    ...
}

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Then you only need one switch