Combo app with quit button

require 'Qt4'

class Window < Qt::Widget

  def initialize(values)
    super(nil) # no parent

    @combo = Qt::ComboBox.new
    @combo.addItems(values)

    @btn = Qt::PushButton.new('Quit')
    @btn.connect(SIGNAL(:clicked)) { self.close() }

    @layout = Qt::VBoxLayout.new
    @layout.addWidget(@combo)
    @layout.addWidget(@btn)

    self.windowTitle = "Combo App"
    self.resize(300, 50)
    self.layout = @layout
  end

  def closeEvent(event)
    puts @combo.currentText
  end

end

if $0 == __FILE__
  app = Qt::Application.new(ARGV) # you may use the QApplication lastWindowClosed
  win = Window.new(('A'..'Z').to_a)
  win.show
  app.exec
end