Double Click in ALV TREE doesn't get triggered

Question

Hello All,
Double click event on item in a alv tree report doesn't get triggered. I thought I was doing everything right. Please help me out.
Look at the code below and tell me what else I need to do.
<b>FORM 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.
Frontend registration:  get already registered tree events
  CALL METHOD g_alv_tree->get_registered_events
    IMPORTING
      events = lt_events.
Frontend registration: add additional event ids
  l_event-eventid = cl_gui_column_tree=>eventid_node_double_click.
  APPEND l_event TO lt_events.
Frontend registration: 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.
    MESSAGE x208(00) WITH 'ERROR'.                          "#EC NOTEXT
  ENDIF.
Register events on backend (ABAP Objects event handling)
  CREATE OBJECT l_event_receiver.
  SET HANDLER l_event_receiver->node_double_click FOR g_alv_tree.
  SET HANDLER l_event_receiver->item_double_click FOR g_alv_tree.
  SET HANDLER l_event_receiver->on_function_selected FOR g_toolbar.
ENDFORM.                    " register_events</b>
When I double click on item on the report double click event doesnt trigger. what could be the problem? Any sample programs?
Thanks,
Chandni

Answer 1

Hi,
Here is a sample code for you.
report ztree.
TABLES : vbak.
DATA: BEGIN OF mylist OCCURS 50. " Internal table hierarchy
INCLUDE STRUCTURE snodetext.
DATA: END OF mylist.
DATA: f15 TYPE c.
DATA :
BEGIN OF gt_sales OCCURS 0,
vbeln LIKE vbak-vbeln,
kunnr LIKE vbak-kunnr,
matnr LIKE vbap-matnr,
arktx LIKE vbap-arktx,
END OF gt_sales.
SELECT-OPTIONS : s_vbeln FOR vbak-vbeln.
START-OF-SELECTION.
SET PF-STATUS 'ZTREE1'.
SET TITLEBAR 'T1'.
Fill internal table with pseudo-data
PERFORM fill_itab.
Hierarchy output
PERFORM main.
*& Form FILL_ITAB
text
--> p1 text
<-- p2 text
FORM fill_itab .
*Fill the gt_sales table
SELECT vkvbeln vkkunnr vpmatnr vparktx INTO CORRESPONDING FIELDS OF
TABLE gt_sales
FROM ( vbak AS vk INNER JOIN vbap AS vp ON vkvbeln = vpvbeln )
WHERE vk~vbeln IN s_vbeln.
SORT gt_sales BY vbeln kunnr.
*Fill the root
mylist-name = 'Report Tree List'.
mylist-color = 1.
mylist-intensiv = '1'.
mylist-text = 'Report Tree List'.
mylist-tlength = 16.
mylist-tlevel = 1.
mylist-tcolor = 1.
mylist-tintensiv = '1'.
mylist-text1 = 'using "RS_TREE_CONSTRUCT" function'.
mylist-tlength1 = 50.
mylist-tcolor1 = 2.
mylist-tintensiv1 = '0'.
APPEND mylist.
LOOP AT gt_sales.
ON CHANGE OF gt_sales-vbeln.
mylist-name = 'level1'.
mylist-color = 0.
mylist-intensiv = '0'.
mylist-text = 'Sales Document no:'.
mylist-tlength = 20.
mylist-tlevel = 2.
mylist-tcolor = 7.
mylist-tintensiv = '1'.
mylist-text1 = gt_sales-vbeln.
mylist-tlength1 = 30.
mylist-tcolor1 = 2.
mylist-tintensiv1 = '0'.
APPEND mylist.
ENDON.
ON CHANGE OF gt_sales-kunnr.
mylist-name = 'level2'.
mylist-color = 0.
mylist-intensiv = '0'.
mylist-text = 'Customer no:'.
mylist-tlength = 20.
mylist-tlevel = 3.
mylist-tcolor = 5.
mylist-tintensiv = '1'.
mylist-text1 = gt_sales-kunnr.
mylist-tlength1 = 30.
mylist-tcolor1 = 3.
mylist-tintensiv1 = '0'.
APPEND mylist.
ENDON.
mylist-name = 'level3'.
mylist-color = 0.
mylist-intensiv = '0'.
mylist-text = gt_sales-matnr.
mylist-tlength = 15.
mylist-tlevel = 4.
mylist-tcolor = 4.
mylist-tintensiv = '0'.
mylist-text1 = gt_sales-arktx.
mylist-tlength1 = 30.
mylist-tcolor1 = 2.
mylist-tintensiv1 = '0'.
APPEND mylist.
ENDLOOP.
ENDFORM. " FILL_ITAB
*& Form MAIN
text
--> p1 text
<-- p2 text
FORM main .
PERFORM hierarchy. " construct & draw the tree
ENDFORM. " MAIN
*& Form HIERARCHY
text
--> p1 text
<-- p2 text
FORM hierarchy .
PERFORM build_tree.
PERFORM draw_tree.
ENDFORM. " HIERARCHY
FORM BUILD_TREE *
Builds the tree from internal table *
Uses the Function module RS_TREE_CONSTRUCT *
FORM build_tree.
CALL FUNCTION 'RS_TREE_CONSTRUCT'
TABLES
nodetab = mylist
EXCEPTIONS
tree_failure = 1.
ENDFORM. "build_tree
FORM DRAW_TREE *
Builds the tree from internal table *
Uses the Function module RS_TREE_DISPLAY *
FORM draw_tree.
sy-lsind = 0.
CALL FUNCTION 'RS_TREE_LIST_DISPLAY'
EXPORTING
callback_program = 'ZREPORT_TREE'
callback_user_command = 'NODE_SELECT'
IMPORTING
f15 = f15.
ENDFORM. "draw_tree
FORM NODE_SELECT *
Handles selection of nodes *
FORM node_select TABLES knoten STRUCTURE seucomm
USING command
CHANGING exit
list_refresh.
Processing of commands for hierarchy list
CASE command.
WHEN 'DISP'.
CASE knoten-id.
WHEN '000002'.
*Display Sales Order
SET PARAMETER ID 'AUN' FIELD knoten-text1.
CALL TRANSACTION 'VA03' AND SKIP FIRST SCREEN.
WHEN '000003'.
*Display Customer
SET PARAMETER ID 'KUN' FIELD knoten-text1.
CALL TRANSACTION 'XD03' AND SKIP FIRST SCREEN.
ENDCASE.
ENDCASE.
list_refresh = 'X'.
ENDFORM. "node_select