Design studio and Creator for Device creation (rPi/imx6 etc...) c++ backend issue

[deleted130]

Hello,

I'm building my ui with design studio 1.4, and then using creator 4.12 to create my backend.
I am deploying app via boot2qt.
It works fine, I followed the various webinars and documents like :

https://doc.qt.io/qt-5/qtqml-cppintegration-overview.html
and
https://doc.qt.io/qtdesignstudio/quick-converting-ui-projects.html

My problem comes after I attached the backend in creator. If i want to modify the UI again in design studio, the import in the qml file that is linked to the qmlRegisterType<> in my main.cpp is not found of course, it is only found in creator.
And thus, design studio doesn't render the qml file because of the error, so I cannot edit graphically.

So what would be the best workflow?

• completely finish the ui, then go in creator and doesn't look back or make only minor adjustements via the text editor?
• find a way to tell design studio that the backend component exists and it can use it? (I would prefer this)

Basically I have in main.cpp:

qmlRegisterType<BackEnd>("dt.backend", 1, 0, "BackEnd");

and in the qml loaded by the engine

...
import dt.backend 1.0 // QML module not found

Item {
    id: mainPage
    width: 1024
    height: 600

    BackEnd {
        id: backend
    }
...

If anyone has an idea that would be awesome.
Thank you.

Edit:
Could this be what I am looking for?
https://doc.qt.io/qt-5/qtqml-modules-qmldir.html

[Thomas Hartmann]

The simplest solution is to create a simple QML mockup for your C++ backend.
A simple example for this approach is the welcome page for Qt Design Studio: https://github.com/qt-creator/qt-creator/tree/master/src/plugins/studiowelcome/qml/welcomepage.

In your case mockdata would contain a simple QML stub for dt.backend.

[deleted130]

Hello Thomas,

Thank you for your reply. I'll try this approach.

Best Regards.