How to throw and handle event defined in component interface

Question

Hi folks,
I have defined a component interface with an event 'open_info'
I have some sub components which are implementing that component interface. I also get the two events generated (the interface check box is not marked)
I use those sub components and try to handle the event. but unfortunately the event is not handled.
I'm not sure if I do everything right. I checked the interface checkbox at the events tab of the controller of the sub component. I then may handle the event in the embedding main component. but it appears to be a different event.
probably I eed to access the interface controller and throw the event there, but I don't know how.
I couldn't fnd documentation or wdr* components which deal with that issue. do you have any suggestions?
regards
stefan

Answer 1

Hi Stefan,
Do the following in the component being used:
say component name is ZCMP_01
go to COMPONENTCONTROLLER
Create an Event with necessary parameters if needed, say Event name is EVNT_01 and has an importing parameter, say PARAM_01 type char10,
Make sure you have set the interface check box. Now this event is available in the INTERFACECONTROLLER.
Say ZCMP_01 has a view with a button, on click of the button, call a method in the COMPONENTCONTROLLER.
Perform all the required operations, At the required point, fire EVNT_01
wd_this->fire_EVNT_01_evt(
      PARAM_01 = 'sample' ).
Now the other component that has to use ZCMP_01, say ZCMP_02
In the component properties od ZCMP_02, add usage for ZCMP_01, say USG_CMP_01
Go to the view in ZCMP_02 where you wish to handle the event EVNT_01 of ZCMP_01,
Go to Methods tab, create an event hadler, say EVNT_01_HNDLR ... method type = Event Handler,
Event = EVNT_01, Controller = INTERFACECONTROLLER, Component Use, USG_CMP_01.
Now your event handler will have foll parametrs: WDEVENT .. type ref to CL_WD_CUSTOM_EVENT,
PARAM_01 type CHAR10
Handle the event as required.
Regards,
Reema.