QtRuby is a binding of the application framework Qt for Ruby. Korundum is an additional set of bindings for KDE which extend QtRuby.

Stable release
2.2.0 / December 16, 2011 (2011-12-16)
Written inRuby
Operating systemCross-platform
LicenseLGPL 2.1

QtRuby is cross-platform, as all the underlying technologies are platform agnostic.

QtRuby hello world

require 'Qt4'

app = Qt::Application.new(ARGV)

hello = Qt::PushButton.new('Hello World!')
hello.resize(200, 30)


The Korundum documentation[1] proposes a more "rubyish" version of this program.

Notable applications that use QtRuby

  • Kubeplayer, a video player dedicated to play online videos.[2]
  • Kaya, a Qt/KDE-based application to play chess, shogi and variants thereof.[3]
  • Yast 2, [OpenSUSE] control center

Status and maintenance

Currently, QtRuby is maintained (if at all) as part of Korundum.

A third-party implementation, named "qtbindings" in the Rubygems repository, has been made due to the lack of active development.[4] Stated goals of the project include keeping an up-to-date version of the Qt framework for Ruby, as well as improving compatibility with non-Linux systems.[5] As of December 2013, it supports Ruby 2.0 and 1.9, but not 1.8.


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