$Date$
$Revision$
-- Install style on scrollbar.
-- Set up all default values for background, border, font and colors.
-- (From EM_WIDGET_DELEGATE)
-- Install style on widgets surface
-- This will be called for every resize of the widget.
-- (From EM_WIDGET_DELEGATE)
-- Does widget contain a_x a_y.
-- (From EM_WIDGET_DELEGATE)
-- Optimal height of scrollbar
-- (From EM_WIDGET_DELEGATE)
-- Optimal width of scrollbar
-- (From EM_WIDGET_DELEGATE)
-- Scrollbar value at position a_x a_y
-- (From EM_SLIDER_DELEGATE)
Delegate of an EM_SCROLLBAR.