Link to action doesn't work in a POWL application

Question

Hi,
I have developed a web dynpro ABAP application and it is called by portal,
This WD calls standard POWL, in a POWL there is a LinkToAction field.
When I click on field the system should open a new window (shopping cart detail),
but it doesn't happen anything.
which could the problem be?
Thank you.
Best regards.
Al

Answer 1

Hi Alberto,
1. Define an Action (corresponding to your Link to action which is typically the FIELD Name of the column in POWL Table) in your POWL feeder Implementation "IF_POWL_FEEDER~GET_ACTION" .
IF_POWL_FEEDER~GET_ACTION is a standard object of custom feeder class, how can I define a new Action?
<Vineet> See the Wiki Link http://wiki.sdn.sap.com/wiki/display/WDABAP/DocumentationInformationabout+POWL
This has a document (POWL.doc) for POWL, refer page number 20. You can use parameter C_ACTION_DEFS for explicitly defining Actions.
2. Handle the defined action in another feeder implementation "IF_POWL_FEEDER~HANDLE_ACTION".
this code could be rigth?
METHOD if_powl_feeder~handle_action.
FIELD-SYMBOLS: <shopping_cart> TYPE STANDARD TABLE.
IF i_actionid = 'SELECTION'.
triggers the event
e_portal_actions-fire_wdevent = abap_true.
Pass parameters to event
ASSIGN c_result_tab TO <shopping_cart>.
i_shopping_cart = <shopping_cart>.
selected row
READ TABLE c_selected INTO ls_selected INDEX y_index.
Read selected POWL data
READ TABLE i_shopping_cart INDEX ls_selected-TABIX INTO s_shopping_cart.
CHECK sy-subrc = 0.
Pass parameters
ls_parameter-key = 'OBJECT_ID'.
ls_parameter-value = 'I_'.
APPEND ls_parameter TO e_portal_actions-parameters.
ENDIF.
ENDMETHOD.
<Vineet> Seems good provided you have defined the action name in "your class->IF_POWL_FEEDER~GET_ACTION" as 'SELECTION'.
3. Now you need to raise an portal event from the method "IF_POWL_FEEDER~HANDLE_ACTION".
where a portal event has to be raised?
<Vineet> You have alrday raised it when you used "e_portal_actions-fire_wdevent = abap_true", as above you can additionally pass parameters as you have done in pushing some data in "e_portal_actions-parameters".
4. This Portal event will be again captured in the event "POWL_FOLLOW_UP" from POWL WD component "POWL_UI_COMP"
<Vineet>Let's assume your WD component is "MY_COMP" which uses "POWL_UI_COMP". then in the component controller or View you can handle an event "POWL_FOLLOW_UP" which is a POWL Interface event. This vene has the same action "SELECTION"a nd the parameters which you have raised from "your class->IF_POWL_FEEDER~HANDLE_ACTION".
5. You can handle this event "POWL_FOLLOW_UP" in your WD which uses "POWL_UI_COMP" and throw a pop-up from your WD component.
it is not clear point 5.
<Vineet> From the event handler of "POWL_FOLLOW_UP" you can launch another webdynpro in a po-up or a new winmdow.
Please let me knwo in case you face issue.
Regards
Vineet
thanks.
Best regards.