Remove_column( ) of cl_wd_table not returning back the column reference

Question

Am using the remove_column( ) of cl_wd_table to remove a particular table column & also get the reference of a the same for inserting at a different position. But the system doesn't return back any value. I tried doing a get_column( ) before doing the remove_column( ) but even that wasn't able to get the reference to that column. I debugged & observed that the system was internally reading an internal table ME->ch_COLUMNS to get the list of columns but this table was empty and so the READ was failing.
method GET_COLUMN.
  CLEAR the_COLUMN.
  IF index > 0.
   READ TABLE ME->ch_COLUMNS INDEX index INTO the_COLUMN.
  ELSE.
   READ TABLE ME->CH_COLUMNS WITH KEY TABLE_LINE->ID = ID INTO
   THE_COLUMN.
  ENDIF.
endmethod.
I had bound the TABLE to a context node based on dictionary structure SCARR & 3 fields CARRNAME, CARRCODE & URL.  Please advise as to why the column references aren't available.
Uday

Answer 1

Hi Suman,
Thanks for the reply.
In WDDOMODIFYVIEW I have put the below coding:
method WDDOMODIFYVIEW .
  check first_time = abap_true.
  wd_this->gr_table ?= view->get_element( id = 'TABLE' ).
endmethod.
I need to change the table column position when the user clicks on a pushbutton. The attribute context_element is an importing parameter of type if_wd_context_element and have declared gr_table in view attributes as of type CL_WD_TABLE.  The coding is as below:
method ONACTIONMOVE_DOWN .
  data: old_index type i,
        new_index type i,
        lr_column type ref to cl_wd_table_column.
  old_index = context_element->get_index( ).
  check old_index < 3.
  lr_column = wd_this->gr_table->get_column( index = old_index ).
  wd_this->gr_table->remove_column( index = old_index ).
  new_index = old_index + 1.
  wd_this->gr_table->add_column( the_column  = lr_column
                                 index       = new_index ).
endmethod.
By the way I have noticed something else while debugging inside the standard code for get_column( ). The ME->CH_COLUMNS is empty but there is another attribute ME->CH_GROUPED_COLUMNS which has the type ref info for the 3 columns which am displaying in the TABLE. I haven't set anything specific properties for the table either. Any inputs from your side would be very useful.
Edited by: Uday on Aug 29, 2008 11:09 AM