class interface BUTTON_SPACE
-- This class is only for layouts.
-- Use function insert_button_space in layouts.
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
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 BUTTON_SPACE