old_contents: import gtk
  
  import _sugar
  
  def points_to_pixels(points):
      screen_factor = gtk.gdk.screen_width() / 1200.0
      return points * _sugar.get_screen_dpi() / 72.0 * screen_factor
  
  def grid_to_pixels(units):
      return units * gtk.gdk.screen_width() / 16
  
  def microgrid_to_pixels(units):
      return units * gtk.gdk.screen_width() / 80
  
new_contents: import gtk
  
  import _sugar
  
  _screen_factor = gtk.gdk.screen_width() / 1200.0
  
  STANDARD_ICON_SCALE = 1.0 * _screen_factor
  SMALL_ICON_SCALE    = 0.5 * _screen_factor
  MEDIUM_ICON_SCALE   = 1.5 * _screen_factor
  LARGE_ICON_SCALE    = 2.0 * _screen_factor
  XLARGE_ICON_SCALE   = 3.0 * _screen_factor
  
  def points_to_pixels(points):
      return points * _sugar.get_screen_dpi() / 72.0 * _screen_factor
  
  def grid_to_pixels(units):
      return units * gtk.gdk.screen_width() / 16
  
  def microgrid_to_pixels(units):
      return units * gtk.gdk.screen_width() / 80
  
subject: Add icon sizes