How to integrate C++ and QML

In this video we explore the basics of integrating QML and C++. We start with a pre-written QML application and will focus on how to write a C++ class which can be exposed to QML.

This example was written using the following...
Qt 6.5.2 MinGw 64 Bit
Qt Creator 11.0.1 (Enterprise)

[Roberto-kdjg]

Show! Este vídeo está me ajundo muito! Continue postando mais vídeos incríveis assim... Thank you!

[MikeTrahearn]

Maybe raise a support ticket or post on the forum with a cut down example.

[theintjengineer]

What if my "C++ Backend" is a C++20 Module, created as an Extension Plugin?

I couldn't just add my *.cppm* files as the values for SOURCE and that's it, right?!, since the C++ Module/Plugin itself has its own "qt_add_module..." characteristics (you can see how it is defined by following the Qt Creator Wizard for a Qt Quick 2 Extension Plugin).

I mean, my Module doesn't know of a Main.qml file "yet", as in your case, where you directly pass the QML File to the QML FILES Variable.
It's when I create the QML Quick App that I'll want to import my Library of Modules, so I can use them inside the QML Files. They're all inside a folder called import. I need to make sure they're are visible to the Project and that I can statically link them.

So, yeah, I'm sort of lost bringing in my C++ Modules (Data Models/Sources, Controllers) to use with a QML View 😅

This is the only problem we're having - we would like to use QML for our GUIs/Views, but have everything as C++20 Modules (we ain't going back to raw headers, #includes, etc. 😂)

Thanks in advance.

[paradox_]

the C++ class used in this demo is named "Backend". I got lost in 6:53 when the Button.onclicked() uses an unknown class named "myBackend"...???

[MikeTrahearn]

QtQml is not always the best include for your type registration macros - depends on whether you want to link to QtQml or not. If you've not had that argument with your boss yet - you will do, so be prepared 😔

[marektengler]

I have followed you steps, but when i added "import <myURIName>" it seems that qml file dont see Backend at all, i have red underline and yellow message saying "QML module contains C++ plugins, currently reading type information...".

Anybody have idea what does it mean?

[shuxiang]

bruh, import CppIntegration QML module not found, what's wrong?

[DanetteKshlerin]

Lewis Karen Thompson Paul Johnson Richard

[JackMaxwell-yt]

Hernandez Jessica Garcia Carol Lee Jessica

[and_then_I_whispered]

WE KNOW HOW TO CREATE A CLASS. SHOW US THE DAMN WAY TO CREATE THE PLUGIN, I'M TIRED OF THE DOCS.