ANY LAYOUT NONE
class interface RECTANGLE
   -- Use rectangle as widget (insert in container then position, draw
   -- and size are automatic).

creation
   make (min_w, min_h, std_w, std_h: INTEGER)

feature(s) from STATE
   state: INTEGER
      -- use values from STATE_CONSTANTS

   is_state_normal: BOOLEAN

   is_state_active: BOOLEAN

   is_state_prelight: BOOLEAN

   is_state_selected: BOOLEAN

   is_state_insensitive: BOOLEAN

feature(s) from WIDGET
   parent: CONTAINER

   pos_x: INTEGER

   pos_y: INTEGER

   x_shrink_allowed: BOOLEAN

   x_expand_allowed: BOOLEAN

   y_shrink_allowed: BOOLEAN

   y_expand_allowed: BOOLEAN

   min_width: INTEGER

   min_height: INTEGER

   std_width: INTEGER

   std_height: INTEGER

   width: INTEGER

   height: INTEGER

   valid_width (w: INTEGER): BOOLEAN

   valid_height (h: INTEGER): BOOLEAN

   area: RECT

   root_area: RECT

   computing_size: BOOLEAN

   set_x_shrink (b: BOOLEAN)

   set_x_expand (b: BOOLEAN)

   set_y_shrink (b: BOOLEAN)

   set_y_expand (b: BOOLEAN)

   set_shrink (b: BOOLEAN)
      -- change both x and y shrink state

   set_expand (b: BOOLEAN)
      -- change both x and y expand state

feature(s) from RECTANGLE
   style: DRAW_STYLE

   set_style (s: DRAW_STYLE)
      -- Change the style used to draw the rectangle.
      -- NOTE: The screen is not updated. --TODO: change this ?
      require
         s /= Void

   reset_default_style
      -- The renderer will be used to draw the line.
      -- NOTE: The screen is not updated. --TODO: change this ?


invariant

    width >= min_width or computing_size;

    height >= min_height or computing_size;

    std_width > 0;

    std_height > 0;

    (not x_shrink_allowed implies width >= std_width) or computing_size;

    (not x_expand_allowed implies width <= std_width) or computing_size;

    (not y_shrink_allowed implies height >= std_height) or computing_size;

    (not y_expand_allowed implies height <= std_height) or computing_size;

end of RECTANGLE