public void Initialize(Orientation dir)
{
if (dir == Orientation.Horizontal)
{
Widget = new Gtk.HScale(0, 1.0, 1);
}
else
{
Widget = new Gtk.VScale(0, 1.0, 1)
{
Inverted = true
}
};
Widget.DrawValue = false;
Widget.ValueChanged += HandleValueChanged;
Widget.Show();
}