ALV Webdynrpo - issues

Question

Hi,
I have created a ALV webdynrpo and have following questions.
1- I have created a zstructure and used in my webdynpro.I don't want to display one of the column.How do we hide that?
2- How can we re-arrange columns sequence in the output view ?
3- I have 2 views(SEARCHVIEW & OUTPUTVIEW) and I was able to hide COPY/RESET buttons which comes on screen defaultly in SEARCHVIEW by using following code in   WDDOINIT method
wd_this->m_handler->set_global_options( i_display_btn_cancel  = abap_false
                                                              i_display_btn_check   = abap_false
                                                              i_display_btn_reset     = abap_false
                                                              i_display_btn_execute = abap_false ).
When I run the report it is using OUTPUTVIEW and these(COPY/RESET) are comming back again.I tried using same code in WDDOINT of OUTPUTVIEW but I am getting an error.
Access via 'NULL' object reference not possible.
4- How do we add Checkbox to the one of the output Column.Just need to enable or disable based on variable.
Rgds
Vara
Edited by: Vara K on Jan 15, 2009 6:19 PM

Answer 1

That is a lot of questions for one thread.  In general you will need to access the component usage interface of the ALV and then you can gain access to the model class of the alv. I often do this functionality in the WDDOINIT of my component controller.
data: l_ref_cmp_usage type ref to if_wd_component_usage.
  l_ref_cmp_usage =   wd_this->wd_cpuse_alv( ).
  if l_ref_cmp_usage->has_active_component( ) is initial.
    l_ref_cmp_usage->create_component( ).
  endif.
  data l_salv_wd_table type ref to iwci_salv_wd_table.
  l_salv_wd_table = wd_this->wd_cpifc_alv( ).
  data l_table type ref to cl_salv_wd_config_table.
  l_table = l_salv_wd_table->get_model( ).
Throught the model object (cl_salv_wd_config_table) you can do most everything you describe in code.  Also consider that with the settings button you can do most of these things at runtime and save the settings as views. 
1- I have created a zstructure and used in my webdynpro.I don't want to display one of the column.How do we hide that?
data l_column type ref to cl_salv_wd_column.
  l_column = l_table->if_salv_wd_column_settings~get_column( 'CLIENT' ).
  l_column->set_visible( cl_wd_uielement=>e_visible-none ).
2- How can we re-arrange columns sequence in the output view ?
l_column = l_table->if_salv_wd_column_settings~get_column( 'BUYER_GUID' ).
  l_column->set_position( 2 ).
3- I have 2 views(SEARCHVIEW & OUTPUTVIEW) and I was able to hide COPY/RESET buttons which comes on screen defaultly in SEARCHVIEW by using following code in WDDOINIT method
Are you sure you are talking about ALV here.  This code sample looks like Select-Options and not ALV.  Reset and Execute definitely sounds like Select-Options as ALV has no such standard buttons.
4- How do we add Checkbox to the one of the output Column.Just need to enable or disable based on variable
data checkbox type ref to cl_salv_wd_uie_checkbox.
  l_column = l_table->if_salv_wd_column_settings~get_column( 'ADD_PARTICIPANTS' ).
  create object checkbox.
  checkbox->set_checked_fieldname( 'ADD_PARTICIPANTS' ).
  checkbox->set_enabled_fieldname( 'ADD_PART_ENABLED' ).
  l_column->set_cell_editor( checkbox ).