This file is intended to keep notes about general coding stuff, code
conventions or how to best interact with certain parts of Qt.



Regarding QSortFilterProxyModel:
========================================
When subclassing QSortFilterProxyModel avoid the use of the following
calls on QModelIndex and use their equivalents of QAbstractItemModel:

inline QModelIndex QModelIndex::parent() const
inline QModelIndex QModelIndex::sibling(int arow, int acolumn) const
inline QModelIndex QModelIndex::child(int arow, int acolumn) const
inline QVariant QModelIndex::data(int arole) const
inline Qt::ItemFlags QModelIndex::flags() const

For Example when reimplementing QSortFilterProxyModel::data(const
QModelIndex &idx, int role):

Avoid:
 idx.data(role); 

Instead:
 QModelIndex source_index = mapToSource(idx);
 sourceModel()->data(idx, role);

