Object Model - cl_salv_hierseq_table Check box hide and Display

Question

I am making use of Object model for creating the hierseq ALV.
I have added a checkbox to my ALV by making use of
gr_selections = gr_table->get_selections( level = 1 ).
gr_selections->set_selection_mode(cl_salv_selections=>if_salv_c_selection_mode~multiple ).
As u can make out by the Value Level = 1 the checkbox is at the header level.
1.) My query is that i want to Enable the checkbox for some header level records and and Disable some header level records based on a condition.
2.) Second query is that I want to read records from the alv in which the checkbox is checked..
Kindly answer.
Thanks,
Nikhil Juneja

Answer 1

Hi aRs.  You need to use the class CL_SALV_SELECTIONS for this.  See here,  
DATA: gt_parent TYPE TABLE OF scarr.
DATA: gt_child TYPE TABLE OF sflight.
DATA: gr_table  TYPE REF TO cl_salv_hierseq_table.
DATA: gr_selections TYPE REF TO cl_salv_selections.
DATA: lt_binding TYPE salv_t_hierseq_binding.
DATA: ls_binding TYPE salv_s_hierseq_binding.
SELECT * FROM scarr INTO CORRESPONDING FIELDS OF TABLE gt_parent.
SELECT * FROM sflight INTO CORRESPONDING FIELDS OF TABLE gt_child.
ls_binding-master = 'CARRID'.
ls_binding-slave  = 'CARRID'.
APPEND ls_binding TO lt_binding.
CALL METHOD cl_salv_hierseq_table=>factory
  EXPORTING
    t_binding_level1_level2 = lt_binding
  IMPORTING
    r_hierseq               = gr_table
  CHANGING
    t_table_level1          = gt_parent
    t_table_level2          = gt_child.
gr_selections = gr_table->get_selections( level = 1 ).
gr_selections->set_selection_mode( cl_salv_selections=>if_salv_c_selection_mode~multiple ).
gr_table->display( ).
This will give you the checkboxes in the parent level, you still need to write the code to get the selected rows.
Regards.
Rich Heilman