RubyQt.rb

signals 'hit()', 'missed()', 'angleChanged(int)', 'forceChanged(int)',
  'canShoot(bool)'

slots   'setAngle(int)', 'setForce(int)', 'shoot()', 'moveShot()', 
  'newTarget()', 'setGameOver()', 'restartGame()'

#...

def restartGame()
  if isShooting()
    @autoShootTimer.stop()
  end
  
  @gameEnded = false

  update()
  emit canShoot( true )
end