ALV tree

[Former Member]

Hi ,

I am using CL_GUI_LIST_TREE to display my tree, here i've a problem in the left pane we have option to expand /collapse .i'm able to capture the event for expansion, but i'm unable to find the event for collapse.

(left side <| click for expand/collapse).what is the event for collapse? if any one have any idea please let me know..

Regards

Vijay

[Former Member]

Hi Vijay,

The super class of CL_GUI_LIST_TREE ,

CL_ITEM_TREE_CONTROL has some methods for collapse

I hope this will help.

Regards,

GSR.

[Former Member]

Hi Srinivas,

i'know that, in cl_gui_list_tree it self i have a mthod for collapse. but the problem here is i want te event which fires after you click on collapse.

i hope it is clear...

Regards

vijay

[Former Member]

Hi kulkarni,

yea for expansion i've used the same event, but that is not triggering for collapse,

are you able to make it tirgger for both.please let me know..

Regards

vijay

[Former Member]

Hello,

set handler me->handle_expand_nc
set handler me->handle_node_double_click
set handler me->handle_node_context_menu_rq
set handler me->handle_node_context_menu_sel
set handler me->handle_item_double_click
set handler me->handle_item_context_menu_rq
set handler me->handle_item_context_menu_sel
<b>set handler me->handle_selection_changed</b>
set handler me->handle_button_click
set handler me->handle_link_click
set handler me->handle_header_click
set handler me->handle_checkbox_change
set handler me->handle_item_keypress
set handler me->handle_node_keypress
set handler me->handle_on_drag
set handler me->handle_on_drop
set handler me->handle_on_drag_multiple
set handler me->handle_on_drop_complete
set handler me->handle_on_drop_complete_mult
set handler me->handle_on_drop_get_flavor

These are the handlers events that you can use in tree i do not see one for collapse however there exists a method

COLLAPSE_SUBTREE will try to use it and see if by this if is possible in some way to do something when the subtree collapses.

Regards,

Shekhar Kulkarni

[Former Member]

Hi,

i used all of the above events for different things, i could not able to find it for collapse, yes i know collapse_subtree method,but

when can i call this method..., where can i call this method if there no event related.

any way thanks for your response.

Regards

vijay

Message was edited by: Vijay Babu Dudla

[Former Member]

sorry for my english. try this... it works but the EXPAND method is not the best one

CLASS cl_tree_event_receiver DEFINITION.

PUBLIC SECTION.

• double click item

METHODS handle_double_click

FOR EVENT node_double_click OF cl_gui_alv_tree

IMPORTING node_key.

• Drag

METHODS handle_on_drag

FOR EVENT on_drag OF cl_gui_alv_tree

IMPORTING drag_drop_object

fieldname

node_key.

METHODS on_before_user_command

FOR EVENT before_user_command OF cl_gui_alv_tree

IMPORTING ucomm.

METHODS on_after_user_command

FOR EVENT after_user_command OF cl_gui_alv_tree

IMPORTING ucomm.

PRIVATE SECTION.

ENDCLASS. "CL_TREE_EVENT_RECEIVER DEFINITION

----

---

• CLASS CL_TREE_EVENT_RECEIVER IMPLEMENTATION

----

---

CLASS cl_tree_event_receiver IMPLEMENTATION.

• handle double_click

METHOD handle_double_click.

CHECK NOT node_key IS INITIAL.

• PERFORM display_ss_log USING node_key.

PERFORM display_bkpf_infos USING node_key.

ENDMETHOD. "HANDLE_DOUBLE_CLICK

• Drag & Drop

METHOD handle_on_drag.

CHECK NOT node_key IS INITIAL.

PERFORM display_ss_log USING node_key.

CALL METHOD cl_gui_cfw=>set_new_ok_code

EXPORTING

new_code = fcode_entr.

ENDMETHOD. "HANDLE_ON_DRAG

METHOD on_before_user_command.

DATA: l_selected_parent TYPE lvc_nkey.

DATA: l_selected_node TYPE lvc_nkey.

DATA: l_selected_nodes TYPE lvc_t_nkey.

DATA: w_lines TYPE i.

DATA: l_key type lvc_nkey.

• MESSAGE i000(0k) WITH text-e18 ucomm.

CASE ucomm.

WHEN '&COLLAPSE'.

CALL METHOD tree1->collapse_all_nodes.

WHEN '&EXPAND'.

CALL METHOD tree1->get_selected_item

IMPORTING

e_selected_node = l_selected_node

EXCEPTIONS

no_item_selection = 1

cntl_system_error = 2

failed = 3

OTHERS = 4.

IF sy-subrc <> 0.

CALL METHOD tree1->get_top_node

IMPORTING

e_node_key = l_selected_node.

ENDIF.

APPEND l_selected_node TO l_selected_nodes.

CALL METHOD tree1->expand_nodes

EXPORTING

it_node_key = l_selected_nodes.

WHEN OTHERS.

ENDCASE.

ENDMETHOD. "on_before_user_command

METHOD on_after_user_command.

• MESSAGE i000(0k) WITH text-e20 ucomm.

• CASE ucomm.

• WHEN '&COLLAPSE'.

• CALL METHOD tree1->collapse_all_nodes.

• WHEN '&EXPAND'.

• WHEN OTHERS.

• ENDCASE.

ENDMETHOD. "on_after_user_command

ENDCLASS. "CL_TREE_EVENT_RECEIVER IMPLEMENTATION

*

DATA: tree_event_receiver TYPE REF TO cl_tree_event_receiver.

[Former Member]

Hi,

Look at the link may be you will find some thing.

http://www.sapdevelopment.co.uk/reporting/alv/alvtree.htm

Thanks.

If this helps you reward with points.

[Former Member]

Hello,

lv_tree
      exporting
          parent              = g_custom_container
          node_selection_mode = cl_gui_column_tree=>node_sel_mode_single
          item_selection      = 'X'
          no_html_header      = ''
          no_toolbar          = ''
      exceptions
          cntl_error                   = 1
          cntl_system_error            = 2
          create_error                 = 3
          lifetime_error               = 4
          illegal_node_selection_mode  = 5
          failed                       = 6
          illegal_column_name          = 7.



    perform build_hierarchy_header changing l_hierarchy_header.

    p_logo = 'Your Logo'.

    perform f_build_comment changing is_header
                                     it_header.

    is_variant-report = sy-repid.
    is_variant-log_group = 'LIST'.


    call method g_alv_tree->set_table_for_first_display
       exporting
                  i_structure_name     = 'Y1MM_IMAC010_ALV'
                  is_variant           = is_variant
                  i_save               = 'A'
                  is_hierarchy_header  = l_hierarchy_header
                  it_list_commentary   = it_header
                  i_logo               = p_logo
                  i_background_id      = 'ALV_BACKGROUND'
       changing
                  it_outtab            = i_out_tree.

* §4. Create hierarchy (nodes and leaves)
    perform create_hierarchy.

* §5. Send data to frontend.
    call method g_alv_tree->frontend_update.

* Events registering for double click event
    perform f_register_events.


form f_register_events.
* Event registration: tell ALV Tree which events shall be passed
* from frontend to backend.
  data: lt_events type cntl_simple_events,
        l_event type cntl_simple_event,
        l_event_receiver type ref to lcl_tree_event_receiver.
*        l_tb_event_receiver type ref to toolbar_event_receiver.
*        l_dnd_event_receiver TYPE REF TO lcl_dnd_event_receiver.

* Register additional events for your own purposes:
* §Remark: you do not need to register dnd events on frontend

* Note 648983: Register double click event in any case!
* If parameter NO_CALL_TA is set 'X' (e.g. when called from
* batch information cockpit) double click on an BWU elemet results
* in calling the respective transaction starting a new task.
* If parameter NO_CALL_TA is initial, transactions will be displayed
* in the same mode as the batch-where-used list.
  call method g_alv_tree->get_registered_events
        importing events = lt_events.

* Frontend registration(ii): add additional event ids
  l_event-eventid = cl_gui_column_tree=>eventid_item_double_click.
  append l_event to lt_events.

* Frontend registration(iii):provide new event table to alv tree
  call method g_alv_tree->set_registered_events
    exporting
      events = lt_events
    exceptions
      cntl_error                = 1
      cntl_system_error         = 2
      illegal_event_combination = 3.
  if sy-subrc <> 0.
* Fehler in der Control-Verarbeitung! (&)
    message s300(12) with 'ERROR'.
  endif.



* Register events on backend (ABAP Objects event handling)
  create object l_event_receiver.
  set handler l_event_receiver->handle_item_double_click
              for g_alv_tree.

endform.                    " f_register_events.


In the data declaration 
CLASS lcl_tree_event_receiver DEFINITION.

  PUBLIC SECTION.
* Define an event handler method for each event you want to react to.
    METHODS handle_item_double_click
      FOR EVENT item_double_click OF cl_gui_alv_tree
      IMPORTING node_key fieldname sender.
* 'sender' is an implicit event parameter that is provided by
* ABAP Objects runtime system. It contains a reference to the
* object that fired the event. You may directly use it to
* call methods of this instance.
ENDCLASS.
*******************************************************************
CLASS lcl_tree_event_receiver IMPLEMENTATION.
* Implement your event handler methods.

  METHOD handle_item_double_click.
    PERFORM f_show_dclick USING node_key fieldname.
  ENDMETHOD.
ENDCLASS.

here i have defined for double click you need to define for expand/collapse that.. is

METHOD HANDLE_EXPAND_NC.

this should solve your problem.

Regards,

Shekhar Kulkarni

[Former Member]

I solved it on my own

[Former Member]

Hi Vijay,

how did you solve the problem. I have the same problem an I don't know how to work around.

Thank you.