QAbstractTableModel DisplayRole stop working

[Lior]

hi,

I implemented a simple QAbstractTableModel with my own roles.
when I started implementing the view I tried to use the display role and it didn't work.

i override the function

QHash<int, QByteArray> CRowModel::roleNames() const

when I disabled the function the display is working.

1. if I override this function I can't use all the other roles that came with the QAbstractTableModel?
2. can I explicitly add them to my hash table?

[JonB]

@Lior
I would guess that you need to add your extra names to the existing, default ones, not just replace them? Maybe your override needs something like:

QHash<int, QByteArray> myRoleNames(QAbstractItemModel::roleNames());  // however you add all base role names
myRoleNames[Qt::UserRole + 1] = "MyRole1";
return myRoleNames;

?

BTW, although I have never used QML, I don't think you have to bother to expand a model's rolenames with this override unless you are using QML where they have names. For plain QAbstractTableModel code you can deal with additional roles in data() & setData() methods without doing this name stuff.

[Lior]

After some searching on Google I understood that when overriding the

QHash<int, QByteArray> CRowModel::roleNames() const

it declares a new hash table,
and it overrides the QAbstractItemModel hash table.

your @JonB solution is the way to keep QAbstractItemModel with all the QT roles.