After getting some early Wayland support in place, Gräßlin has been working on KDE Frameworks 5 support in recent weeks.
In a new blog post this morning, Martin shares that KWin is now in a Qt Quick 2 world.
Porting from Qt Quick 1 to Qt Quick 2 has required adjustments to the QML files and C++ code. Martin writes, "right now all usages of QtQuick in KWin core and KWin effects have been ported to QtQuick 2. Still remaining is Aurorae – this needs some more work as the window decoration API needs adjustments anyway given that right now rendering of decorations in non-compositing is broken."