Treeview and custom model

[jpn]

Remove DACanTreeModel::index(). It's incorrect and makes the model to not work properly. There should be no need to reimplement it.

Edit: Sorry, forget what I just said. For some reason I read it as QAbstractTableModel. Some other thread must have confused me. For QAbstractItemModel you naturally need to implement index() since it's pure virtual. But do you really need a QAbstractItemModel? In some other thread your data looked flat to me, so maybe you should consider using QAbstractTableModel which makes things easier for you.

[spud]

At the moment your model is flat and you can access any item with (row, column), thus your createIndex function can be very simple. If you're intending to make a truly hierarchical model, that won't be enough, though and you will have to store more information in the QModelIndex::internalPointer(). For example you could store a pointer to the parent item.
If you really need a hierarchical model I suggest you take look at the Simple Tree Model Example. Otherwise it will be a lot easier to go with the QAbstractTableModel as jpn suggested.

[steg90]

Hi JPN,

Don't think the data is flat, well, not 2d, as the first column will show message nodes with their corresponding signal nodes. Unless I'm mistaken, QAbstractTableModel doesn't allow this?

Please see attachment of what I'm trying to do.

Regards,
Steve

[jpn]

Don't think the data is flat, well, not 2d, as the first column will show message nodes with their corresponding signal nodes. Unless I'm mistaken, QAbstractTableModel doesn't allow this?

Please see attachment of what I'm trying to do.

Yes, you're right. The model needs to handle parent-child relationships. Well, good luck with implementing a tree model then! Model Test might be handy for checking out the most common mistakes.

[steg90]

Thanks JPN,

I've decided to go for the table model as I don't really need to display the message name and data as the messages are chosen from a previous dialog, this will be the easier option for me as I'm totally confused about the modelIndex and the internalPointer() function?!

Kind regards,
Steve