Hi, On 04 Dec 2013, at 20:18, joao morgado <joaodeusmorg...@yahoo.com<mailto:joaodeusmorg...@yahoo.com>> wrote: @: Wim de Vries. I share your frustation about OpenGL with QWindow, and I'm also frustated with Qt widgets. I have a very nice app in OVI, symbian, with QWidgets and OpenGL, I'll have to do a complete redesign, since widgets are black listed.
The reason for the blacklist is twofold: 1) we do not (and have not) done any work on QWidget-using applications on Sailfish, either in terms of working at all/working correctly, let alone working performantly - and as we don’t have infinite resources, we have to choose where to focus, and that isn’t on widget-using applications 2) they will not work performantly at all, due to being stuck with the software rendering stack (we’re talking something well under the display refresh rate on an un-loaded device) Separately from the problem of actually working, and working well, any use of QtWidgets also imposes some pretty nasty resource penalties on your application (mostly in terms of startup, but also resource usage) as it’s a pretty massive library. Generally speaking - they just aren’t very mobile-friendly. That example of QWindow with OpenGL, to me, it's an over complicated mess, luckly I managed to port my opengl code to QWindow but took me quite a while to do it. To me, there is a better example here https://github.com/advancingu/Qt5OpenGL An example rather depends on what you want to do. Either you’re: 1) using QML writing C++ items to integrate into the scene graph (see http://qt-project.org/doc/qt-5.0/qtquick/qquickitem.html for the base class) - this also means you’ll be able to use Silica in your application 2) using C++, instantiating a QWindow, and doing all your rendering by yourself (ideally using OpenGL ES) - something like http://qt-project.org/doc/qt-5.0/qtgui/openglwindow.html 3) other, as-yet-to-be-finalised routes like doing *everything* yourself, using SDL, etc. So it seems that only QML apps are supported, but I have no clue how to add a QWindow in a QML app. There's an example in QtCreator "Scene Graph - OpenGL under QML" but they use QQuickItem, for OpenGL, so I still don't have a clue how to use OpenGL in a QML app. Your QML application has a C++ entry point (though if you’re using something like qmlscene… you’ll need to create such an entry point yourself) with your ‘main’ function. You can create a QWindow in there, and show it. You can hook into QML using Q_INVOKABLE methods to show it based on a clicked action on a Silica button, etc, etc, etc. I’d need more information to be able to really provide useful help here :) Regards João de Deus BR, Robin
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