View source for Languages/Ruby/Ruby-Qt/KDE Book/First Steps/Hello World

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After all you should have a working ruby installation with KDE 4 bindings.

So lets try the a very minimalistic KDE 4 application to get a first impression.

= Interactive Hello Ruby =

== Implementation Using Qt 4 ==

<code ruby>
require 'Qt4'

a = Qt::Application.new ARGV
w = Qt::PushButton.new( "Click me to quit" ) do
  connect( SIGNAL :clicked ) do
    puts "Do something else"
    Qt::Application.instance.quit
  end
end
w.show
a.exec
</code>

<code ruby>
require 'Qt4'

a = Qt::Application.new ARGV
w = Qt::PushButton.new( "Click me to quit" )
w.connect( SIGNAL :clicked ) do
    puts "Do something else"
    Qt::Application.instance.quit
end
w.show
a.exec
</code>

<code ruby>
require 'Qt4'

class Qt::Application

  slots :doSomething

  def doSomething
    puts "Do something else"
    Qt::Application.instance.quit    
  end
  
end

a = Qt::Application.new ARGV
w = Qt::PushButton.new( "Click me to quit" )
w.connect( SIGNAL :clicked,  a, SLOT :doSomething)
w.show
a.exec
</code>