Add_node method

Question

Hi Expert!!
I need you help i am creating column tree with using my local class with reference to cl_gui_column_tree the method add_node is not in this class .As this method is present in cl_column_tree_model class.Please advice which method i can use as similarly add_node in cl_gui_column_tree.
Thanks in advance.
Ankur Garg

Answer 1

Hello Ankur
Sample report SAPCOLUMN_TREE_CONTROL_DEMO shows how to build a tree using class cl_gui_column_tree.
Below you see part of the coding where the tree nodes are created:
* add some nodes to the tree control
* NOTE: the tree control does not store data at the backend. If an
* application wants to access tree data later, it must store the
* tree data itself.
  PERFORM BUILD_NODE_AND_ITEM_TABLE USING NODE_TABLE ITEM_TABLE.
  CALL METHOD G_TREE->ADD_NODES_AND_ITEMS
    EXPORTING
      NODE_TABLE = NODE_TABLE
      ITEM_TABLE = ITEM_TABLE
      ITEM_TABLE_STRUCTURE_NAME = 'MTREEITM'
    EXCEPTIONS
      FAILED = 1
      CNTL_SYSTEM_ERROR = 3
      ERROR_IN_TABLES = 4
      DP_ERROR = 5
      TABLE_STRUCTURE_NAME_NOT_FOUND = 6.
  IF SY-SUBRC <> 0.
    MESSAGE A000.
  ENDIF.
* expand the node with key 'Root'
  CALL METHOD G_TREE->EXPAND_NODE
    EXPORTING
      node_key            = c_nodekey-Root
    EXCEPTIONS
      FAILED              = 1
      ILLEGAL_LEVEL_COUNT = 2
      CNTL_SYSTEM_ERROR   = 3
      NODE_NOT_FOUND      = 4
      CANNOT_EXPAND_LEAF  = 5.
  IF SY-SUBRC <> 0.
    MESSAGE A000.
  ENDIF.
ENDFORM.                    " CREATE_AND_INIT_TREE
It seems that this class does not have a method for adding a single node. Thus, use method ADD_NODES_AND_ITEMS with a single entry in the node and item itabs.
Regards
  Uwe