Using C++ Models with QML

So far, we have discussed how to use Models and Views in Qt Widgets and QML. But in most modern applications, you will require Models written in C++ and a frontend written in QML. Qt allows us to define Models in C++ and then access them inside QML. This is convenient for exposing existing C++ data Models or otherwise complex datasets to QML. Native C++ is always the right choice for complex logical operations. It can outperform logic written in QML with JavaScript.

There are many reasons why you should create a C++ Model. C++ is type-safe and compiled into object code. It increases the stability of your application and reduces the number of bugs. It is flexible and can offer more features than the QML types. You can integrate with your existing code or with a third-party library that is written in C++.

You can define a C++ Model using the following classes:

• QStringList
• QVariantList
• QObjectList
• QAbstractItemModel

The first...