private void RefreshGC()
{
if (text_window == null)
{
return;
}
text_gc = new Gdk.GC(text_window);
text_gc.Copy(Style.TextGC(StateType.Normal));
Gdk.Color color_a = parent.Style.Foreground(StateType.Normal);
Gdk.Color color_b = parent.Style.Background(StateType.Normal);
text_gc.RgbFgColor = DrawingUtilities.ColorBlend(color_a, color_b, 0.5);
}