How can IWD_VALUE_HELP return multiple values, instead of one

Hello expert,
I have requirement to use F4 help to return multiple values to the using WD component. Basically in my main WD component, I have a View where I have a list box, this list box has a F4 assigned to it, clicking on the F4 brings up hte F4 help, in the F4 help, user can select multiple values which should be returned to my main component / view to be displayed in the list box.
I'd implement IWD_VALUE_HELP to create my own F4 help component. However I have difficulty to return multiple values. As I understand there is only way to return data from F4 help to the calling Main WD component / view:
Item_LISTENER->F4_CONTEXT_ELEMENT->set_attribute( name = 'MYATTRName' value = myvalue).
Do you guys know how to archive what is required here?
Thanks
Jayson

Hello Jayson,
the element reference that is passed into the IWD_VALUE_HELP implementing component is the element of the calling application's context.
Therefore you can use methods like
IF_WD_CONTEXT_ELEMENT->GET_NODE
(to get the parent node of the element) and
IF_WD_CONTEXT_ELEMENT->GET_CHILD_NODE
to get access to other parts of the context.
say for example your value help should populate a pop-in table with multiple entries.
your application allows you to choose a type of ice-cream cone and then to choose the flavour of ice-cream (multi selection)has a structure like:
Context_root
--> List_of_ice_creams (0..n)
>Ice_cream_flavours(1..n)
In the element of list_of_ice_creams you have an attribute "flavour" which links to your value help.
Choosing this value-help should allow you to select multiple flavours, return these and populate them into the sub-node Ice_cream_flavours.
Within your custom value help you can get a reference to the node Ice_cream_flavours by calling the method
lo_flavour_node = IItem_LISTENER->F4_CONTEXT_ELEMENT->GET_CHILD_NODE("ICE_CREAM_FLAVOURS"). You could then populate this in you value help component.
As I mentioned - this isn't great as it means the value help cannot really be used elsewhere as it has a dependency on the structure of the calling context. But that may not be an issue for you.
Hope that helps,
Chris

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