Greetings, everybody,
Date: Wed, 29 Nov 2023 17:03:04 -0800
From: Michael Jackson <mike.jack...@bluequartz.net>
To: Shawn Rutledge <shawn.rutle...@qt.io>
Cc: Yauheni Pervenenka via Interest <interest@qt-project.org>
Subject: Re: [Interest] QGraphicsView and OpenGL in Qt6
<hot take>
I’d like to chime in with a real world application that we have been
developing. It has a VTK based 3D rendering engine inside a Qt application
that is widget based. It did not start out great. We burnt 10 months with
3~4 engineers trying to develop this application as a QML desktop
application and it was just one thing after another in QML that just would
stop us in our tracks. QML on Desktop just isn’t as mature as Widgets on
the Desktop and suggesting for someone to rewrite a generally well working
desktop application to QML is not just a huge disservice but would be a
huge mistake. We ended up taking the last 2 months of the contract and spun
up a widgets based application and got more features completed for the
client in those 2 months than we did with 10 months of QML development. I
know things change but after that little exercise I am not sure anyone
would ever convince me to try QML on the desktop again. Period. If QWidgets
goes away we would probably just move to another language all together
rather than try QML. QML on Phones and tablets? Sure. Go for it. Desktop,
stay away. Far Far away.
</hot take>
And ironically enough, our application will also be trying to render large
tiled mosaics through VTK. Our tiled images are 2K x 2K each and our data
sets are upwards of 500 to 700 tiles at this point. The QTable idea sounds
interesting. I would have to research how to render the table inside an
OpenGL scene.
[...]
Thank you so much for your insightful message. It is indeed months (years?) that
I am pondering if time has come for a switch. Then I would look for Qml elements
available that would somehow replicate widgets like tree views and such. I would
systematically feel like "no, we are not there yet".
But the real reason I comment on your message is this:
I know things change but after that little exercise I am not sure anyone
would ever convince me to try QML on the desktop again. Period. If QWidgets
goes away we would probably just move to another language all together
rather than try QML. QML on Phones and tablets? Sure. Go for it. Desktop,
stay away. Far Far away.
+1000
It is some time now that I feel like Qt going the Qml route in a preferred
manner with respect to the QWidget route (more revenues, I guess). I hope I am
wrong with this feeling. I would be terribly sorry to have to adopt a new
library set for widgetry...
Sincerely,
Filippo
--
⢀⣴⠾⠻⢶⣦⠀ Filippo Rusconi, PhD
⣾⠁⢠⠒⠀⣿⡁ Research scientist at CNRS
⢿⡄⠘⠷⠚⠋⠀ Debian Developer
⠈⠳⣄⠀⠀⠀⠀ http://msxpertsuite.org
http://www.debian.org
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