For some time I've been considering what to do about Jovie which was previously known as ktts (KDE Text To Speech). Since before the first KDE Frameworks release actually, since kdelibs used to host a dbus interface definition for the KSpeech dbus interface that ktts and then Jovie implemented. I have a qt5 frameworks branch of Jovie, but it didn't make much sense to port it, since a lot of it is or could become part of the upcoming QtSpeech module. So Jovie has no official qt5 port and wont be getting one either.
Most of the window decorations available for KWin are not native decorations but themes for a native theme engine, such as deKorator, Smaragd, QtCurve or my own Aurorae. Themes are much easier to design and to distribute than a native decoration which has to be implemented in C++ and be distributed by the Linux distribution. Thus themes are an important part of the decoration system.
But we did a very bad job of integrating the themes into our configuration system. The configuration system only knows about native decorations and doesn’t know that the native decoration is in fact a theme engine. This makes selecting a theme difficult, because a user has to first select the theme engine and then configure this to select the theme. Downloading new themes through GHNS is also difficult as again it requires to go through the configuration of the theme engine. We can do better.
I started working on that port back in the last KDE Telepathy sprint in Barcelona last April. Back then, I started to work on it because I have been doing heavy usage of the KTp plasmoids back when using the KDE 4 Plasma series and I didn’t want to live without them. Back then, I only ported the minimum parts of ktp-common-internals so it would work with KF5, as well as the plasmoids. It was quite some work, but definitely worth it since I’ve been using them ever since, and it’s worked wonderfully.
When the first CSD “what if” was made in the KDE community forums it became the catalyst that got me in touch with some of the fine developers who really do make KDE happen, from them and members of the VDG I was educated on a new method of decorating windows with clean yet powerful widgets, and I have the privilege of presenting the idea we have worked and iterated on for some weeks now today...
KDE contributor and graphics designer Ken Vermette has penned an interesting series of KDE "What if..." articles where he talks about (and has some visual mock-ups) about what KDE might look like with client-side decorations along and separately if KDE were to use Windows 10 design components.