Qt 5 has a complete new interface for input methods. Instead of the old QInputContext (which is just a wrapper around the new system now) there is now QInputPanel and QPlatformInputContext (no documentation yet, see source), for the reasoning see QTBUG-20088 – Create proper input method abstraction and expose it through a public API in QTGui.

Luckily there is already a simple platform input context for the Maliit input method framework in the Qt code base available. There are some smaller bugs open, but they should be easy to fix. So it should be already possible to use Maliit with Qt 5 applications.

Additionally we would of course like to compile Maliit itself against Qt 5 too. Based on the previous work eliminating the X requirement in Maliit it was a quite easy task to compile it with Qt 5 and required just fixing some smaller bugs and updating some build system files.

After that I tried to run Maliit with the XCB platform. This showed an ugly bug, the virtual keyboard stole the focus from the application. On Qt 4 we used the WA_X11DoNotAcceptFocus Qt::WidgetAttribute which does not work for the XCB (and Xlib) platforms in Qt 5. I filed a bug about this issue and created a patch (which is sadly only visible when one has a gerrit account registered). With that patch applied to Qt 5 Maliit was basically working.