CL_WD_TABSTRIP instance assignment problem?

Question

hi,
   i have taken tabstrip control (TABSTRIP1) on view name called (DATEVIEW1) , now on click on perticular button i m having one method , where i want selected tab from tabstrip....
   in that method i have written code ,
DATA CLWDTBSTRP TYPE REF TO CL_WD_TABSTRIP.
CALL METHOD CLWDTBSTRP->GET_SELECTED_TAB
EXPORTING
   CONTEXT_ELEMENT        =
   CONTEXT_NODE_PATH_NAME =
  RECEIVING
    VALUE                  = VAL .
So in VAL i will be getting name of selected tab..
but i am not getting reference in CLWDTBSTRP , so how to assign my tabstirp TABSTIP to instance CLWDTBSTRP.. i am getting null pointer exception error...
Thanks,
Saurin Shah

Answer 1

Hi Saurin,
When you say get_selected_tab you should be calling this method using the reference of the tabstrip that you have placed on your view. So first of all you should obtain the tabstrip reference in your WDDOMODIFYVIEW and then save it into a view level attribute so that you can use it within other methods of your view.
So try declare a reference variable say lr_tabstrip of type ref to cl_wd_tabstrip in the "Attributes" tab of your view.
Now within the WDDOMODIFYVIEW obtain the reference of your tabstrip and save it inside this variable.
method WDDOMODIFYVIEW .
  check first_time = abap_true.
" Pass the id of the tabstrip that you have assigned within your layout to get its reference
    wd_this->lr_tabstrip ?= view->get_element( id = 'TABSTRIP' ).
endmethod.
Next use this reference to get the ID of the tab selected by the user in this tabstrip:
method ONACTIONGET_SELECTED_TAB .
  data lv_name type string.
" Now the id of the tab selected by the user would get saved in the string variable lv_name
  lv_name = wd_this->lr_tabstrip->get_selected_tab( ).
endmethod.
Regards,
Uday