#!/usr/bin/env ruby

require 'Qt4'

class MyWidget < Qt::Widget
  def initialize(parent = nil)
    super()
    quit = Qt::PushButton.new('Quit')
    quit.setFont(Qt::Font.new('Times', 18, Qt::Font::Bold))
    
    lcd = Qt::LCDNumber.new(2)

    slider = Qt::Slider.new(Qt::Horizontal)
    slider.setRange(0, 99)
    slider.setValue(0)

    connect(quit, SIGNAL('clicked()'), $qApp, SLOT('quit()'))
    connect(slider, SIGNAL('valueChanged(int)'), lcd, SLOT('display(int)'))

    layout = Qt::VBoxLayout.new()
    layout.addWidget(quit)
    layout.addWidget(lcd)
    layout.addWidget(slider)
    setLayout(layout)
  end

end

app = Qt::Application.new(ARGV)

widget = MyWidget.new()
widget.show()

app.exec()