myview.h

#ifndef __MY_VIEW__
#define __MY_VIEW__

#include <QAbstractItemModel>
#include <QFileSystemModel>
#include <QPersistentModelIndex>
#include <QMap>

//#define USE_PERSISTENT

class MyFileSystemView : public QFileSystemModel
{
    Q_OBJECT

    MyFileSystemView();
    virtual int columnCount(const QModelIndex& parent = QModelIndex()) const;
    virtual QVariant data(const QModelIndex& index, int role) const;
    virtual Qt::ItemFlags flags(const QModelIndex& index) const;
    virtual bool setData(const QModelIndex& index, const QVariant& value, int role);

private:
    void propagateCheckState(const QModelIndex& index, Qt::CheckState state, bool down);
#ifdef USE_PERSISTENT
    /* FIXME using QPersistentModelIndex breaks QFileSystemModel: see QTBUG-12413
     * for some reason it prevents the view for hidings items thus the hidden
     * filter doesn't work */
    mutable QMap<QPersistentModelIndex, Qt::CheckState> m_checkstate;
#else
    /* BUG HACK this is an ugly hack which rely on QModelIndex.internalPointer()
     * to never change */
    mutable QMap<void*, Qt::CheckState> m_checkstate;
#endif
    Qt::CheckState getState(const QModelIndex& index) const;
    void setState(const QModelIndex& index, Qt::CheckState state);
};

#endif /* __MY_VIEW__ */