Better understanding of the ModelView archtecture

[boudie]

Normally, you implement your own data() method that returns the value for a given ModelIndex. It could look something like this:

QVariant CalculatorTapeModel::data(const QModelIndex &index, int role) const
{
	if (!index.isValid()) return QVariant();
 
 
	if (role == Qt::TextAlignmentRole)
	{
                ...   alignment code   ...
	}
 
 
	if (role == Qt::DisplayRole)
	{
                *** This is where you should check the state of your dynamic items ***
                ...   return data for requested item   ...
	}
}

QVariant CalculatorTapeModel::data(const QModelIndex &index, int role) const
{
	if (!index.isValid()) return QVariant();


	if (role == Qt::TextAlignmentRole)
	{
                ...   alignment code   ...
	}


	if (role == Qt::DisplayRole)
	{
                *** This is where you should check the state of your dynamic items ***
                ...   return data for requested item   ...
	}
}

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