[Interest] Native windows with QtCore backend

Jeffrey Brendecke jeffrey.brendecke at gmail.com
Mon Oct 29 15:24:25 CET 2018

> On Sunday, 28 October 2018 08:58:57 PDT Jeffrey Brendecke wrote:
>> Is it possible to have a 100% native UI (Cocoa or UIKit) with backend QtCore
>> components (nonGUI) on a functioning event loop for signals and slots on
>> macOS and iOS?
> Sure. But you need to integrate the event loops, so one of these three things:
> 1) use the Core Foundation event dispatcher (and make sure it works)
> 2) tell your native UI event dispatcher to use QSocketNotifier and QTimer
> 3) write an event dispatcher deriving from QAbstractEventDispatcher that 
> integrates QSocketNotifier and QTimer with your native UI's dispatcher
> The event dispatcher you really want is called QCocoaEventDispatcher, but it's 
> in the Cocoa QPA plugin, which requires QtGui.
>> For example, I would like use the Qt network components to interact with a
>> network while using only native windows and native views for the
>> presentation.
> Option 4: only use Qt components outside the main thread.
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel Open Source Technology Center
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Thanks, Thiago,

Regarding: 1-3, I was afraid something like that would be the case after looking at the Qt-Mac integration code.

Option 4 looks like a possibility for me.

It looks like it means that as long as I run QCoreApplication::exec() on its own thread, that I can do all the Qt event handling/signal slot connections I want on that thread and not worry about what's going on on the main thread/Apple event loop until I need to synchronize data with the main thread. Then, it would be nothing more than what is normally involved with synchronizing data between threads.

Is this correct?

Thanks in advance,


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