How to enable /disable the row in ALV?

Question

Hi Experts,
I have gone through some threads on this but I did not find useful to my requirement.
My requirement is:
Consider two columns : one is set delete column (a button) and another editable field.
When the user presses on set delete button. The editable field should be disabled and it should be enabled whenever the user presses the button again.
Kindly let me know the solution.
Thanks.

Answer 1

Hi,
As i am also new to web dynpro abap. I found it a gud thing to learn about ALV grid.
So, I tried doing it like that and found that its not at all difficult.
Here is the procedure that i followed.
1. Create a context node with two attribute from any table structure and one attribute of type wdy_boolean for controlling the
    enable property of input field.
2. i used the supply function to fill the node. Here is the code for the same.
data lt_dealer type wd_this->Elements_zdealer.             "My node name is zdealer
DATA ls_dealer LIKE LINE OF lt_dealer.
select * from zdealer into corresponding fields of table lt_dealer.
loop at lt_dealer into ls_dealer.
  ls_dealer-enable = abap_true.                             "to enable all the fields initially
  modify lt_dealer from ls_dealer.
  endloop.
node->bind_table( lt_dealer ).
3. create view container UIelment in the view and embed table view of the ALV used comp.
4.  add interface controller of SALV_WD_TABLE to the used controller in the view and also add comp controller of our
local comp to the used controller list of interface contrl of Used comp. And then map the data node to the node we have filled in
the supply function.
5. go to the wddoinit method to configure the ALV grid. means adding button and input field and binding the enable property of
input field. Here is the code for the same.
data lo_cmp_usage type ref to if_wd_component_usage.
  lo_cmp_usage =   wd_this->wd_cpuse_alv( ).
  if lo_cmp_usage->has_active_component( ) is initial.
    lo_cmp_usage->create_component( ).
  endif.
  DATA lo_INTERFACECONTROLLER TYPE REF TO IWCI_SALV_WD_TABLE .
  lo_INTERFACECONTROLLER =   wd_this->wd_cpifc_alv( ).
    DATA lo_value TYPE ref to cl_salv_wd_config_table.
    lo_value = lo_interfacecontroller->get_model(
lo_value->IF_SALV_WD_TABLE_SETTINGS~SET_CELL_ACTION_EVENT_ENABLED( abap_true ).
lo_value->IF_SALV_WD_TABLE_SETTINGS~SET_READ_ONLY( ABAP_FALSE ).
data btn type ref to cl_salv_wd_uie_button.
data inp type ref to cl_salv_wd_uie_input_field.
data col1 type ref to cl_salv_wd_column.
data col type ref to cl_salv_wd_column.
data col2 type ref to cl_salv_wd_column.
call method lo_value->IF_SALV_WD_COLUMN_SETTINGS~GET_COLUMN
exporting
  id = 'NAME'                         "col name is NAME (col with button)
  receiving
  value = col.
call method lo_value->IF_SALV_WD_COLUMN_SETTINGS~GET_COLUMN
exporting
  id = 'LOCATION'                "col name is LOCATION (col with input field)
  receiving
  value = col1.
call method lo_value->IF_SALV_WD_COLUMN_SETTINGS~GET_COLUMN
exporting
  id = 'ENABLE'                   "this col is used to control the enable property of input field and we will make it invisible.
  receiving
  value = col2.
create object btn.
CREATE OBJECT INP
EXPORTING
  VALUE_FIELDNAME = 'LOCATION'.
inp->set_enabled_fieldname( 'ENABLE' ).
COL1->SET_CELL_EDITOR( INP ).
btn->SET_TEXT_FIELDNAME( 'NAME' ).
col->set_cell_editor( btn ).
col2->set_visible( '01' ).                     " making the enable col invisible
Now you need to create one eventhanlder for the action of cell action.
for this create an eventhandler and then even col there select ON_CELL_ACTION for the inerface cntrl of ALV.
now write the code in this eventhandler for enabling or disabling the input field after checking the current value and
row number from which the button was clicked. code for the same.
DATA lo_INTERFACECONTROLLER TYPE REF TO IWCI_SALV_WD_TABLE .
  lo_INTERFACECONTROLLER =   wd_this->wd_cpifc_alv( ).
    DATA lo_value TYPE ref to cl_salv_wd_config_table.
    lo_value = lo_interfacecontroller->get_model(
data inp type ref to cl_salv_wd_uie_input_field.
data col1 type ref to cl_salv_wd_column.
data str type string.
str = R_PARAM->COLUMN.
data indx type i.
  indx = r_param->index.               " this will get the row number
  DATA lo_nd_zdealer TYPE REF TO if_wd_context_node.
  DATA lo_el_zdealer TYPE REF TO if_wd_context_element.
  DATA ls_zdealer TYPE wd_this->element_zdealer.
  DATA lv_value LIKE ls_zdealer-enable.
* navigate from <CONTEXT> to <ZDEALER> via lead selection
  lo_nd_zdealer = wd_context->get_child_node( name = wd_this->wdctx_zdealer ).    
lo_el_zdealer = lo_nd_zdealer->get_element( index = indx ).     " get the corresponding element.
lo_el_zdealer->get_attribute(
    EXPORTING
      name =  `ENABLE`
  importing
      value = lv_value ).
IF str EQ 'NAME'.
  if lv_value eq abap_true.
lo_el_zdealer->set_attribute(
    EXPORTING
      name =  `ENABLE`
      value = abap_false ).
else.
  lo_el_zdealer->set_attribute(
    EXPORTING
      name =  `ENABLE`
      value = abap_true ).
  endif.
ENDIF.
this will solve it.
Thanks and Regards,
Sarbjeet singh