OpenEuphoria

Re: wxEuphoria: get_next_tree_child() Returning 0 For All Child Items

• Posted by ghaberek (admin) Jul 17, 2018
• 1149 views

These first/next functions are basically iterators. That is, the "next" function gives elements until the list is exhausted, then it returns NULL. The consumer (you) doesn't need to know how many elements are in the list.

Do it like this:

-- user has selected a category; uninstall all forms in list 
atom indx = get_tree_selection( tree_Templates ) 
 
atom item, cookie 
sequence list = {} 
 
-- Euphoria 4.1 supports multiple assignments 
{item,cookie} = get_first_tree_child( tree_Templates, indx ) 
 
while item do 
    list = append( list, item ) 
    item = get_next_tree_child( tree_Templates, indx, cookie ) 
end while 

-Greg