Textview with totals based on dynamic ALV selections

Question

Hi all, it´s me again, suffering like a mother with my first WDA serious application
I have this ALV with a prices column, with an editable checkbox field, and what my client wants is a field on the screen (I think it must be a Textview) that displays the total sum of all selected rows in the ALV. Of course, this sum must be dynamic, according with the actual selection.
Could anyone tell what should I do?
Thanks a lot, best regards.
Federico Alvarez

Answer 1

Hi Fedrico,
Seeing your problem, You hv to write the logic on the ON_DATA_CHECK event of the alv grid.
I am giving you a sample code that might helps you.
METHOD on_data_check .
Data declaration for assigning the contract,total and balance(remaining) amount
  DATA : lo_nd_contract_payment TYPE REF TO if_wd_context_node,
         lo_el_contract_payment TYPE REF TO if_wd_context_element,
         ls_contract_payment    TYPE wd_this->element_contract_payment,
         lv_contract_amount     LIKE ls_contract_payment-contract_amount,
         lv_value_date          LIKE ls_contract_payment-value_date.
   Data Declaration
  DATA : lo_nd_payment_table    TYPE REF TO if_wd_context_node,
         lo_el_payment_table    TYPE REF TO if_wd_context_element,
         ls_payment_table       TYPE wd_this->element_payment_table,
         lt_payment_table       LIKE TABLE OF ls_payment_table,
         lv_total_amount        LIKE ls_payment_table-amount,
         lv_balance_amount      LIKE ls_payment_table-amount,
         lv_paymeth             LIKE ls_payment_table-payment_method,
         lt_paycreate           TYPE TABLE OF /dmpui/db_str_paycreate,
         ls_paycreate           TYPE /dmpui/db_str_paycreate.
  Data declartion for message manager
  DATA : lo_api_controller     TYPE REF TO if_wd_controller,
         lo_message_manager    TYPE REF TO if_wd_message_manager.
  get message manager
  lo_api_controller ?= wd_this->wd_get_api( ).
  CALL METHOD lo_api_controller->get_message_manager
    RECEIVING
      message_manager = lo_message_manager.
  navigate from <CONTEXT> to <PAYMENT_TABLE> via lead selection
  lo_nd_payment_table = wd_context->get_child_node( name = wd_this->wdctx_payment_table ).
check for data error in the grid
  CHECK r_param->t_error_cells IS INITIAL.
  IF lo_nd_payment_table IS NOT INITIAL.
  get all declared attrigbutes
    lo_nd_payment_table->get_static_attributes_table(
      IMPORTING
        table = lt_payment_table ).
  ENDIF.
  lo_el_payment_table = lo_nd_payment_table->get_element( ).
  lo_el_payment_table->get_attribute(
  EXPORTING
      name =  `PAYMENT_METHOD`
   IMPORTING
      value = lv_paymeth ).
  lv_total_amount = 0.
  wd_assist->gc_total_amount = 0.
  IF lt_payment_table[] IS NOT INITIAL.
Looping at the payment internal table*
    LOOP AT lt_payment_table INTO ls_payment_table.
        lv_total_amount = lv_total_amount + ls_payment_table-amount.
      ENDIF.
      CLEAR ls_payment_table.
    ENDLOOP.
  ENDIF.
Passing the Total Amount Value to the Assistance class variable
  wd_assist->gc_total_amount = lv_total_amount.
navigate from <CONTEXT> to <CONTRACT_PAYMENT> via lead selection
  lo_nd_contract_payment = wd_context->get_child_node( name = wd_this->wdctx_contract_payment ).
get element via lead selection
  lo_el_contract_payment = lo_nd_contract_payment->get_element(  ).
  lo_el_contract_payment->get_attribute(
    EXPORTING
      name =  `CONTRACT_AMOUNT`
   IMPORTING
      value = lv_contract_amount ).
Calculating the balance amount
  lv_balance_amount = lv_contract_amount -  wd_assist->gc_total_amount.
get single attribute
  lo_el_contract_payment->set_attribute(
    EXPORTING
      name =  `TOTAL_AMOUNT`
      value = wd_assist->gc_total_amount ).
  lo_el_contract_payment->set_attribute(
      EXPORTING
        name =  `BALANCE_AMOUNT`
        value = lv_balance_amount ).
Binding the data to the context node
  lo_nd_payment_table->bind_table(
    EXPORTING
      new_items            = lt_payment_table   " List of Elements or Model Data
      set_initial_elements = abap_true          " If TRUE, Set Initial Elements Otherwise Add
ENDMETHOD.
Regards
Manoj Kumar
Edited by: Manoj Kumar on Feb 27, 2009 10:25 AM