Hello Planet KDE, hello RubyCorner

Earlier this year I started writing a KDE application using the Ruby programming language. Coming from the web development, I am no expert at all in C++. So I decided to give KDE development a try using the Ruby bindings for KDE 4 called korundum4.

It wasn’t as easy as expected. Unfortunatly the korundum4 project didn’t got very popular by now, so I found a lot of bugs on the way. Now, three months later, all the bugfixes are included in the last stable KDE. The idea, of just copying the project folder and starting the app without the need of any further setup1, becomes finally true.

Announcing Kubeplayer

I started a kind of clone of the well known Qt-based Youtube player Minitube. When starting the development, I had in mind to support Vimeo and maybe some other online video platforms, too. The app should integrate itself better into the KDE workspace, and lately I had the idea of turning it into a mobile app, too. It was possible to get a much cleaner and shorter code, not only because of the nice KDE KIO classes, but also by using Ruby.

Let’s Try It Out In Less Than 1 Minute!

Ok, to be fair, I have to admit, this is only possible using a recent Linux OS2 with korundum4 and Ruby 1.9.x preinstalled.

To give Kubeplayer a try, you just have to checkout the repository, and start the application.

git clone git://git.kde.org/kubeplayer
ruby kubeplayer/kubeplayer


That’s it. You can also install kubeplayer using CMake. Installation works like you would it expect it from a CMake based C++ application.

If you get an error related to json, you are probably using an Ruby version prior to 1.9.x. In this case you have to install rubygems via you distribution package manager. Then you can use Ruby’s own package manager to install the missing dependency.

gem install json


Get Involved!

Not everything is done by now. Youtube works in the most a lot of cases. The GUI needs a lot of small improvements. I even thought about a maemo/meego port, paid for an N900 on eBay, but unfortunately got duped :(. So the mobile development has to wait.

After all, the project is still quite young, the code is very short, nice and clear. If you ever felt like trying to develop for/with KDE, the barrier is now quite low.

• You don’t have to deal with a KDE development environment. Just clone the repo and you are done. Since yesterday, you can find the project in playground.
git clone git://git.kde.org/kubeplayer
• You don’t need to know C++.
• You don’t have to compile anything at all!
• You can use the shiny new git infrastructure of KDE.

Take a look at the code base. There are not many files at all. Summed up, there are less then 1000 lines of code (including rare comments). For an already functional multimedia application, this is really few.

kubeplayer
├── CMakeLists.txt
├── kubeplayer
├── lib
│   ├── CMakeLists.txt
│   ├── kubeplayer.desktop
│   ├── kubeplayer.rb
│   ├── List.rb
│   ├── MainWindow.rb
│   ├── provider
│   └── Video.rb
├── main.rb


How does the future of Kubeplayer look like? I have already a lof of ideas, what could be done. Maybe you have also many, but different ones. What about:

• allowing the use to login and comment on all supported video platforms
• make flash needless on netbooks by providing an optimized app
• create a scripted KPart to fetch youtube pages and open the video using kubeplayer