get rotation information on N950and N9 - qt Widget

[schroffi]

hi,
I developed a application with QWidget. Now i have to port it to the new device n950 (n9).
The appliation stay allways in the lanscape mode. And ist not rotating with rotation the device.
Is ist possible to activate rotating, and/or to get the information after rotate the screen?
THx paul

[achipa]

The only supported method for orientation on MeeGo 1.2 Harmattan is through QtQuick.

That said, there is a workaround in the form of embedding QWidget based UIs in QML through the QGraphicsProxyWidget class. To achieve this, you need to create a wrapper QML project with Window {} or PageStackWindow {} elements, and put your UI in it as a QML element. Note that using this workaround has known issues with layouting, performance and no system specific styling will be applied to the QWidgets used this way. For an example how to do this, see

http://doc.qt.nokia.com/4.7-snapshot...-qwidgets.html

(The example uses a QPushButton, but you could use any QWidget based class). Let me know if you need additional help with this.

[developer 123]

The only supported method for orientation on MeeGo 1.2 Harmattan is through QtQuick.

That said, there is a workaround in the form of embedding QWidget based UIs in QML through the QGraphicsProxyWidget class. To achieve this, you need to create a wrapper QML project with Window {} or PageStackWindow {} elements, and put your UI in it as a QML element. Note that using this workaround has known issues with layouting, performance and no system specific styling will be applied to the QWidgets used this way. For an example how to do this, see

http://doc.qt.nokia.com/4.7-snapshot...-qwidgets.html

(The example uses a QPushButton, but you could use any QWidget based class). Let me know if you need additional help with this.

I am facing almost the same problem. I need to launch and lock application in portrait mode regardless of phone orientation. Application is based on QWidgets.
My application is Qt C++ one without using qml stuff. How I should solve this rotation problem then?

[achipa]

As said, you don't. There is no orientation setting support for QWidgets-based UIs in MeeGo 1.2 Harmattan (you're locked to landscape and that's it). You *have* to use QtQuick components (=QML) at least as a wrapper (though if you just wrap QWidgets with a QGraphicsProxyWidget as per that link, you will still lack the styling).

EDIT: That is not to say that you cannot provide a portrait-like mode *yourself*, see http://www.developer.nokia.com/Commu...an-orientation

[developer 123]

That's weird. For me QtQuick is showstopper, bcs it is lot of Qt ui stuff to port and it is unacceptable for me. :-(

[achipa]

You have a ready example how to embed your existing QWIdgets based UI in to a QML wrapper. I'm not sure what the difficulty is. On a side note, QtQuick is the de-facto development method already on all mobile Qt platforms, and with Qt 5.0 that's going to apply to desktop, too (with widgets provided as a legacy module which may or may not be present on a platform).

[developer 123]

I have existing Symbian Qt project, based on QMainWindow and bunch of QWidget based controls and forms: the UI code is set of 30 classes and 10-20 000 lines of code. Based on your example I have to rewrite my UI code to completely different qml "syntax". Do you have more specific example How to "wrap" QMainWindow and all parent set of QWidget classes to QtQuick without touching 10 000 lines of existing Qt code?