Built-in sort and tree-views
Build-in sort on tree-views can be disabled if needed.
By default, the built-in sort is enabled in a TREE container;
when the end user clicks on column headers, the runtime system
sorts the visual representation of the program array. Tree nodes
are ordered by levels; the children nodes are ordered inside a given
parent node.
This is a powerful built-in feature. However, in some cases, the tree structure must be static
(the order of the nodes must not change) and you don't want the end user to sort the rows. To
prevent the built-in sort, use the
UNSORTABLECOLUMNS attribute for the
TREE container
definition:LAYOUT
...
END
ATTRIBUTES
TREE tv: mytree, UNSORTABLECOLUMNS, ...
...