ALV Tree - how to put checkbox on the node level?

Question

Hello everyone!
I have an AlvTree and I have special column named SEL. That column contains checkboxes. I want to put additional checkboxes at the node level, I need them to create select all option.
In other words I must somehow create something similar to do_sum option. DO_SUM works for numeric columns, the sum of all rows in current node appears at the top level. So I must do the same but checkbox.
Are there any ideas?
Here is my code of creating the tree.
DATA: g_tree9001 type ref to cl_gui_alv_tree_simple.
" Here I fill fieldcat...
create object g_tree9001
      EXPORTING
        i_parent                    = g_doc_cont
        i_node_selection_mode       = cl_gui_column_tree=>node_sel_mode_single
        i_item_selection            = 'X'
        i_no_html_header            = 'X'
        i_no_toolbar                = ''.
call method g_tree9001->set_table_for_first_display
      EXPORTING
        i_save              = 'A'
        is_variant          = ls_variant
      CHANGING
        it_sort             = gt_sort9001
        it_outtab           = gt_tree9001
        it_fieldcatalog     = gt_treefcat9001.
My output table gt_tree9001 has sthe following structure:
BUKRS, KTEXT, SEL, SWERK.
My sort table gt_sort9001 has 2 rows. Sorting by BUKRS and KTEXT.
My tree looks like this:
BUKRS/KTEXT  --- SEL --- SWERK
+bukrs1 ------------------------------
  -- ktext1 ---  X --- swerk1
  -- ktext2 ---  X --- swerk2
+bukrs2 ------------------------------
  -- ktext3 ---  X --- swerk3
I want to get:
BUKRS/KTEXT  --- SEL --- SWERK
+bukrs1 ----------X----------------
  -- ktext1 ---  X --- swerk1
  -- ktext2 ---  X --- swerk2
+bukrs2 ----------X----------------
  -- ktext3 ---  X --- swerk3
Appreciate any help!

Answer 1

Hi ,
Check the below threads, it may give some idea to get check box in the node .
[LINK1|Check box on left navigation of ALV tree;
[LINK2|Checkbox ALV Tree CL_GUI_ALV_TREE;
Regards,
Saravana.S