Hello there. I've been developing digital tabletop applications for a while now. I started back in 2008 with Qt 4.something and I clearly remember it had no support (or very limited) for multi-touch, gestures, and stuff. Besides, back then I also needed to support fiduciary markers, so I just went ahead and rolled out my own solution made of a QGLWidget for drawing, custom "widgets" that inherited from QWidget and could draw themselves on the GL viewport (so little I did know about proxies back then, but anyways), and a fairly sophisticated multi-finger gestures framework that became wonky as deadlines approached. After that, enter Qt's gestures, and I had no need for them for a while.
After this I went ahead and developed a number of what you'd call toy examples in various languages and platforms, such as Processing, Open Frameworks, and so on. Nothing really fancy, mainly demos and stuff to elicit a wow-response, and besides, the most complex gestures I needed for these toys were single-finger drags and taps: pretty easy, right? A while ago I discovered Cinder and I suddently fell in love with it. It fit my needs, it was C++, it had TUIO support for all those hardware platform that I used to work with (mainly back-projected IR tabletops like the Reactable and all that jazz) and it was something new I wanted to learn. I've developed a couple of applications so far, and I've been decently happy with it, except that there seems to be no freely available gestural framework for C++ (to the best of my knowledge, although I encourage you guys to point me at any if you know them: I love Qt but usually the more options I have, the better). Once again I had to roll out my own gestural framework. I had literally zero time to do it and it turned out far better than I expected, but still quite crappy (no priority support, no direct precedences, pinch-to-zoom works like sand in the fuel tank, and so on, for those interested). Then I remembered that Qt had gestures, and as far as I can tell, a pretty sophisticated framework at that, except that I haven't touched Qt since 4.7, and even then I did no gestures at all, mainly plain old GUI programming, so enter 5.1, I have no idea what the world looks like now, except for Daniel's excellent TUIO support (if only for fingers, but I promise I'll work on fiducials in the future :). I've been reading around for a while and I've come across all this graphics view and graphics scene business. I clearly remember, some time in 2009 I think, asking whether regular QWidgets could be painted in a GL viewport. The answer was something along the lines of "not yet but soon…" and apparently soon is now. That much I know. What I don't know is: would a combo of graphics(view|scene) work for my needs? Basically I need to replicate what I've been doing so far with big-loop-based applications (Processing's draw() anyone? Cinder follows a similar concept, fyi) and I want to do it with Qt. As far as I can tell, I just need to set up a QGraphicsView, associate it with a GraphicsScene (inheriting from QGraphicsScene) in which I'd add all my visual pizzazz and gestures, and I'm golden? I'm quite confused right now but I have some time that I can spend on it. I really want to use Qt, if only for the gestures, so any hint/pointer/head-ups is enormourly appreciated. (I'd give links to all those projects I mentioned but I'm not sure it'd be worth it. If you want to see something, there's something in my github account, like in the signature) -- Andrea Franceschini https://github.com/Morpheu5/ _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
