NAME

image_inherit_order - Changes the specific object order value to be expressed as relative to its parent.

SYNOPSIS

nil
image_inherit_order( vid, bool_state )

DESCRIPTION

Normally, order is expressed as an independent property. For some applications e.g. user-interfaces, it might be more useful and intuitive to express it relative to a linked object to cut down on the amount of tracking and reordering calles needed to reorder an anchor point used for something like a window. By default, order inheritance is disabled, but can be explicitly enabled by calling this function.

NOTES

1

For long hierarchies, this can be an expensive operation as changes to order implies a detach/attach operation and is implemented recursively.

EXAMPLE

function image_inherit_order0()


      a = fill_surface(32, 32, 255, 0, 0);


      b = fill_surface(16, 16, 0, 255, 0);


      order_image(a, 2);


      order_image(b, 1);


      image_inherit_order(b, true);


      link_image(b, a);


      show_image({a, b});
end

MISUSE

function image_inherit_order0()


      a = fill_surface(32, 32, 255, 0, 0);


      order_image(BADID);
end

MISUSE

function image_inherit_order1()


      a = fill_surface(32, 32, 255, 0, 0);


      order_image(a, "not a number");
end