Event handling using htmlb

Question

Hi,
I am creating a small bsp application where I have Test.htm and error.htm pages. Test.htm page contains a button which when clicked should traverse to the second page which does not occur. Then code I have for the event handling is given below.
CLASS cl_htmlb_manager DEFINITION LOAD.
IF event_id = cl_htmlb_manager=>event_id.
  DATA: event TYPE REF TO cl_htmlb_event.
  event = cl_htmlb_manager=>get_event( runtime->server->request ).
  IF event->name = 'button' AND event->event_type = 'click'.
<b>    DATA: button_event TYPE REF TO cl_htmlb_event_button.
    button_event ?= event.
</b>
  ENDIF.
    CASE event->id.
      WHEN 'mybutton'.
        navigation->next_page( 'ERROR' ).
      WHEN OTHERS.
    ENDCASE.
ENDIF.
Also please explain me the lines of code given in bold fonts.
Regards
Noufal

Answer 1

hi Noufal,
The difference is that :
When you are not using HTMLB library but using simple HTML buttons ussing <INPUT TYPE = BUTTON > then
to capture that event you should use
onclick = OnInputProcessing(button_id)  ,
where "button_id" is the value in "event_id" variable in "OnInputProcessing" Event.
But if you are using HTMLB then no need for this .
Just use :
onClick = "button_id"
where "button_id" is the value you can capture in event_id attribue of an object that belongs to CL_HTMLB_EVENT class.
For ex :
data event type ref to CL_HTMLB_EVENT.
event->event_id = "id of the element that has generated  
                   the event, and in this case button_id".
I hope this will solve all your issues.
Regards,
Ankur