How to use Hierarchy isExpanded and how to delete the child nodes

[Former Member]

Hi Friends,

Currently am working on a Table Hierarchy(TreeByKeyTableColumn)....here when the user clicks on root node I wil call the FM/Class for the backend call and I will generate(fill) the child nodes.For the time being did with some dummy data..please see the below code

INIT():

    DATA lo_nd_table_data_source TYPE REF TO if_wd_context_node.

    DATA lo_el_table_data_source TYPE REF TO if_wd_context_element.
    DATA ls_table_data_source TYPE wd_this->Element_table_data_source.

*   navigate from <CONTEXT> to <TABLE_DATA_SOURCE> via lead selection
    lo_nd_table_data_source = wd_context->get_child_node( name = wd_this->wdctx_table_data_source ).

*   get element via lead selection
    lo_el_table_data_source = lo_nd_table_data_source->get_element( ).

data:
    lt_rows type if_main=>elements_table_data_source,
    row     like line of lt_rows,
    IT_Asset TYPE ZAssetView .

IT_ASSET-ROW_KEY = 'WWU'.
    IT_ASSET-PARENT_ROW_KEY = ''.
    IT_ASSET-TREE_COLUMN_TEXT = 'WWU'.
    IT_ASSET-TABLE_COLUMN_1_T = ''.
    IT_ASSET-IS_LEAF = abap_false .

    APPEND IT_ASSET TO IT_Asset1 .

    IT_ASSET-ROW_KEY = 'WS'.
    IT_ASSET-PARENT_ROW_KEY = 'WWU'.
    IT_ASSET-TREE_COLUMN_TEXT = 'WS'.
    IT_ASSET-TABLE_COLUMN_1_T = 'Wales South'.
    IT_ASSET-IS_LEAF = abap_false .

    APPEND IT_ASSET TO IT_Asset1 .

*
   lo_nd_table_data_source->bind_table( new_items = IT_Asset1 ).

    lo_el_table_data_source = lo_nd_table_data_source->get_element( ).

The above code will generate a static hierarchy when they click on the above generated nodes,am generating a child nodes based on the clicked parent node 3 times....please see the below code in OnLoadChildren()

do 3 times.
*   save the index so that we can use it in deeper levels
    lvl1_index = var1.
    lvl2_index = sy-index.
    condense lvl2_index.

    concatenate lvl1_index `.` lvl2_index into LS_ASSETIT-row_key.
    LS_ASSETIT-PARENT_ROW_KEY = lvl1_index.
    LS_ASSETIT-TABLE_COLUMN_1_T = 'RAJESHlv_id'.
    concatenate lvl1_index `.` lvl2_index into LS_ASSETIT-TREE_COLUMN_TEXT .
    LS_ASSETIT-IS_LEAF = ABAP_FALSE .
    insert ls_AssetIT into table it .

    ENDDO.
    ENDIF.

    lo_nd_your_node->bind_table( new_items = it SET_INITIAL_ELEMENTS = ABAP_FALSE ).
    CLEAR IT.

   lo_nd_your_node->SET_LEAD_SELECTION_INDEX( -1 ).

    .
ENDIF.

* Note : Please go through the attachment with screeen shots will give a better idea

Upto here its absolutely fine, but the issue am facing is .. when I open a node its generating 3child node as per the logic above... and when I close and reopen its generating again (getting 6nodes , with duplicate nodes)..so how can I know when I open  a node is already opened ?....

And please let me know is there any way that I can delete a child nodes which generated on based of a particular parent-key.

Your suggestions and toughts a really helps to me.

Regards

Rajesh

[former_member213957 · Accepted solution]

Hi Raj,

yaa.. its a silly mistake is you forgot to clear the internal table and indexes in the onloadchildren method.Do it.

I thought its works fine!!

Regards,

Kishorekumar

[Former Member · Accepted solution]

I cleared and refered my IT and WA even though its not working, Filling the nodes code I placed in a separate method and am calling that method in onLoadChildren ...so its automatically IT is getting refreshed.

I just done it by puting a flag like WDY_BOOLEAN and i checked before calling the Fillnodes () methods is its not open than am filling the data and making the flag 'Y'

Thanks for the replies.

Regards

Rajesh

[Former Member]

You have to refresh your internal table.

REFRESH IT . " Refresh your ITAB before starting the loop
do 3 times.
*   save the index so that we can use it in deeper levels
    lvl1_index = var1.
    lvl2_index = sy-index.
    condense lvl2_index.
    concatenate lvl1_index `.` lvl2_index into LS_ASSETIT-row_key.
    LS_ASSETIT-PARENT_ROW_KEY = lvl1_index.
    LS_ASSETIT-TABLE_COLUMN_1_T = 'RAJESHlv_id'.
    concatenate lvl1_index `.` lvl2_index into LS_ASSETIT-TREE_COLUMN_TEXT .
    LS_ASSETIT-IS_LEAF = ABAP_FALSE .
    insert ls_AssetIT into table it .
    ENDDO.
    ENDIF.
    lo_nd_your_node->bind_table( new_items = it SET_INITIAL_ELEMENTS = ABAP_FALSE ).
    CLEAR IT.
   lo_nd_your_node->SET_LEAD_SELECTION_INDEX( -1 ).
    .
ENDIF

[Former Member]

Hi Updendra ,

I need a help to add the child node to the parent node in Hierarchy from the table event, when I select some parent(WS.2.2) node from hierarchy it will open a pop up window with table , when user select the record from the table and click on OK button ,that selected record from the table should add like a child node to the selected parent node(WS.2.2) in the hierarchy.

I created a action action event and wrote the code in that ,if I call the 

ONACTIONTREEONLODCHID() (this is the one I created for Onloadchildren)...will that helps me ..if not please share your suggestions.

Regards

Rajesh