Most efficient way to implement data in QML from C++

[anda_skoa]

QUESTION: Given the platform and amount of data - what is the best method for populating model in QML that allows for the usage of delegates

A custom C++ model.

The delegate part is on the QML side, it doesn't care what kind of model you have. Even a plain number can be treated as a model.

The two ways we are currently looking at are:
a) creating a list model in QML and populating data with javascript (see code example below
This method is working but we are concerned about performance issues using javascript over c++
QUESTION: Is this the best method?

No

b) creating a QAbstractTableModel in c++
new to this concept and am concerned that I will have to create individual get / set functions for each column. We currently have over 50 columns. (I believe these are "roles" within the QAbstractmodel )
QUESTION: Does QAbstractTableModel allow for the usage of delegates in QML, If using QAbstractmodel is the best approach, then does every column need it's own get set function?

While you can use QAbstractTableModel, e.g. if you also want to show the data in a widget based QTableView, QtQuick will only treat it as a list model.
A table model can still work if the model can map the QML roles onto columns, or you just derive from QAbstractListModel.

QUESTION: Is there a third option that we are not considering?

Yes, QAbstractListModel

Cheers,
_