Web Dynpro, Tree

Hi all,
I implemented a recursive tree using the UI Element Tree. My customer wants to see this tree expanded up to the second level on the start of the view.
Is there a possibility to manage it (expand 2 levels of the tree) in my ABAP program or somehow else?
Kind regards,
Oleksandr

Hi,
Refer this online help: http://help.sap.com/saphelp_nw70ehp1/helpdata/en/21/ad884118aa1709e10000000a155106/content.htm
Also refer this standard component: WDR_TEST_EVENTS. Look for the tree views.
I hope it helps.
Regards
Arjun

Similar Messages

  • Problems with tutorial: "Creating a Web Dynpro Tree"

    Hi!
    I'm a rookie and therefore I'm practicing on compleating some tutorials like "Creating a Web Dynpro Tree" (https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f0ec6622-8da5-2a10-349b-868b6a553efa)
    I did just as the tutorial told me to (I think) but still I get a java.lang.NullPointerException when I deploy and run my application.
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        //@@begin wdDoModifyView
           if (firstTime) {
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                /* parameter mapping from parameter "path" to
    parameter "selectedElement"
                treeNode._mappingOfOnAction()._addSourceMapping("path", "selectedElement");
                /* parameter mapping from parameter "path" to
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                treeNode._mappingOfOnLoadChildren()._addSourceMapping("path","element");
        //@@end
    What I don't understand is what the function/meaning of the parameter path is. The parameters selectedElement and element I do recognize and have written. And I don't understand why there is a difference between the two underscored line of code (see above) even though the comments claim that it does the same kind of mapping.
    Best regards
    /Johan

    I tried to get "addSourceMapping()." underscored so people would better understand what I was referring to but it didn't work and that's why it looked weired.
    Thanks for your help Armin, now it works fine.
    It was as you said.
    if (firstTime) {
    IWDTreeNodeType treeNode = (IWDTreeNodeType) view.getElement("TreeNodeType");
    When I changed "TreeNodeType" to it's real ID, "TheNode" I didn't get a nullPointerException. I think it must be wrong in the tutorial because I followed the instructions which said to name it "TheNode" but then the author mus have forgot to change it from the default ID ("TreeNodeType").
    Best Regards!
    /Johan

  • Web Dynpro Tree expanding

    Hi there!
    I am using the tree element in web dynpro.
    Not the tree in the table.
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    Hi,
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    This expansion can be perfomed automatically by a recursive method which is called when a user pushes a button called "Expand all"....
    I don't have much time to explain the details, but I will provided the source code..., hope it helps!
    Darko
    Source Code -
    Import to the Method:
    i_node_ref type IF_WD_CONTEXT_NODE = Reference to the context node
    METHOD nav_tree_expand_all.
    Data declaration
      DATA node_elements TYPE wdr_context_element_set.
      DATA node_element  LIKE LINE OF node_elements.
      DATA child_node    TYPE REF TO if_wd_context_node.
      DATA ls_tree_attr  TYPE zlm_str_tree_gen.
      DATA lt_tree       TYPE zlm_tty_tree_gen.
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      node_elements = i_node_ref->get_elements( ).
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      LOOP AT node_elements INTO node_element.
        " Get Static attributes
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        " Check if data has already been loaded
        IF ls_tree_attr-children_loaded = abap_true.
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          ls_tree_attr-is_expanded = abap_true.
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          child_node = node_element->get_child_node( 'SUBTREE' ).
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                                             i_component_id  = i_component_id ).
        ELSE.
          " data has not been loaded yet...
          " First load the nodes...
         clear lt_tree.
          me->get_nav_tree_nodes( .....importing lt_tree.). Custom specific data retrieval
          IF lt_tree IS NOT INITIAL.
            child_node = node_element->get_child_node( 'SUBTREE' ).
            child_node->bind_table( lt_tree ).
            " Update Attributes of the node
            ls_tree_attr-is_expanded     = abap_true.
            ls_tree_attr-children_loaded = abap_true.
            node_element->set_static_attributes( EXPORTING static_attributes = ls_tree_attr ).
            " Call the method again recursively...
            me->nav_tree_expand_all( EXPORTING i_node_ref      = child_node
                                               i_screen_id     = i_screen_id
                                               i_component_id  = i_component_id ).
          ENDIF.
          " ... then load the items
          CLEAR lt_tree.
          me->get_nav_tree_items( .....importing lt_tree.).  Custom specific data retrieval
          IF lt_tree IS NOT INITIAL.
            " Update Attributes of the node
            ls_tree_attr-is_expanded     = abap_true.
            ls_tree_attr-children_loaded = abap_true.
            node_element->set_static_attributes( EXPORTING static_attributes = ls_tree_attr ).
            child_node = node_element->get_child_node( 'ITEM' ).
            child_node->bind_table( lt_tree ).
          ENDIF.
        ENDIF.
      ENDLOOP.
      RETURN.
    Edited by: Darko Mocelj on May 7, 2008 8:57 PM

  • Web Dynpro Tree in the Component Controller

    Hi!!!
    I made a tree in the view. But to separating the view and the model I would like to create the tree in the component controller. Therefor I copy the code from the view to the controller and adapt them, but it doesn`t work. I get the first node and that`s it. I can`t add children, although I called the responsible method.
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    Greets
    Roman

    Check your mapping between view & controller (actually, view controller & custom / interface / component controller) -- it seems that you have mapped only top-level node but not children.
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    Hello experts,
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    Does anybody know if this is possible?

    Hi Benjamin,
    Here you can use the concept of exit plugs. Refer this online help: http://help.sap.com/saphelp_nw70/helpdata/EN/45/1bc575ba064574e10000000a114a6b/frameset.htm
    I hope it helps.
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    Arjun

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    2. What is the standard way to retrieve the Hierarchy onto Web Dynpro?.
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    Thanks,
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    Raj,
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  • Tree in Web Dynpro Abap

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    Tranks

    Sorry in Web dynpro Java!
    And if it´s not possible. How can I Communicate two Iviews?
    how can I pass parameters from an Iview to another?
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  • Recursive Tree  using Web Dynpro java

    Hi
    I've been trying to create a recursive tree using java in Web Dynpro.
    Can you please suggest a good example to try with?

    Hi,
    Check the below links....
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webdynpro/wd%20java/wd%20tutorials/integration%20of%20a%20tree%20structure%20in%20a%20web%20dynpro%20table.pdf
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webdynpro/wd%20java/wd%20tutorials/constructing%20a%20recursive%20and%20loadable%20web%20dynpro%20tree.pdf
    http://help.sap.com/saphelp_nw70/helpdata/en/13/4cde139306304480e89d815ffcf891/frameset.htm
    http://help.sap.com/saphelp_nw70/helpdata/en/af/44ea406c9d3d43e10000000a155106/frameset.htm
    http://help.sap.com/saphelp_nw70/helpdata/en/21/ad884118aa1709e10000000a155106/frameset.htm
    Code Example,
    http://help.sap.com/saphelp_nw70/helpdata/en/16/1ec1814e566f4baf943c53ccf48552/frameset.htm
    null

  • Integration of a Tree Structure in a Web Dynpro Table

    Hi,
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    The Tree-Table os working as required, but I can not work with the OnLeadSelect Action of the table.
    The Action does not work as required, meanning, it returns all the time the first row and not the "lead select".
    As far as I read I should add some code to the wdDoModifyView method, but I did not figure out exactly what...
    Thanks in advance,
    Aviad

    check this URL:
    /people/valery.silaev/blog/2005/06/20/master-of-columns-part-ii

  • Formatting tree UI element in web dynpro

    Hi,
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    I want to format tree in web dynpro java.I mean i want to add spaces between the nodes of a tree or can i get something like hgutter functionality between the nodes.
    Regards,
    ujjwal kumar

    Hi
    No
    Only thing u can do is set Is Design to Emphasized (Bold) and add any images into Node and item both.
    depends on image size u will get some space between text of tree.
    (Applicable with CE 7.1 onwards not in 7.0)
    Tree  [help|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/de59f7c2-0401-0010-f08d-8659cef543ce]
    Best Regards
    Satish Kumar
    Edited by: satish jhariya on Mar 18, 2009 4:49 PM

  • Tree Hierarchy in Web Dynpro

    Hello All,
    I want to create a web dynpro application that implements some functionlity that I saw in the SAP backend system. In the backend, I have a transaction that allows me to drill down into nodes and add and remove them with a right click context menu. This is like a tree structure with the ability to add, remove and modify node elements. I want to present this to the front end user using web dynpro and possible in a nice table format. How can I go about doing this? Any suggestions?
    Thanks
    Marshall.

    Ok, I try to explain with a simple example.
    Say, your context has the following structure:
    WebDynproClass (node, cardinality=0:n)
    - expanded (boolean)
    - name (string)
    - SubClasses (recursive node -> Class)
    Then, you can build the following tree:
    UIElement (root)
    + AbstractCaption (e_1)
       + AbstractButton (e_1_1)
          + Button (e_1_1_1)
    + RadioButton (e_2)
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    /* helper method, put inside //@@begin others...//@@end section */
    private IWebDynproClassElement addSubClass(String name, IWebDynproClassElement parent)
      IWebDynproClassElement child = (parent == null)
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        : parent.nodeSubClasses().createAndAddWebDynproClassElement();
      child.setExpanded(true);
      child.setName(name);
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    /* builds initial tree, call from wdDoInit() */
    private void init()
      IWebDynproClassElement root = addSubClass("UIElement", null);
      IWebDynproClassElement e_1 = addSubClass("AbstractCaption", root);
      IWebDynproClassElement e_1_1 = addSubClass("AbstractButton", e_1);
      IWebDynproClassElement e_1_1_1 = addSubClass("Button", e_1_1);
      IWebDynproClassElement e_2 = addSubClass("RadioButton", root);
    Now if you want to add "Caption" as subclass of "AbstractCaption" later, you have to find the context element that represents the "AbstractCaption" class and add it as above:
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    addSubClass("Caption", parent);
    If you have to implement the find() method at all depends on your application. Maybe you want to
    - provide a context menu (available since 7.1) on the tree nodes to add child nodes, or
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    - you provide a toolbar button to add a child node to the currently selected tree node (since 6.40)
    Example for a static menu at a TextView cell editor:
    Table (dataSource = WebDynproClass)
    + TreeByNestingTableColumn (expanded = WebDynproClass.expanded)
       + TextView (text = WebDynproClass.name)
          + Menu
             + MenuItem (id = AddChildItem, onAction = AddChild, nodeElement -> AddChild.parent)
    Action "AddChild" has text "Add Child" and a parameter "parent" of type IWebDynproClassElement. Action handler is
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        //@@begin onActionAddChild(ServerEvent)
        addSubClass("Child #" + parent.nodeSubClasses().size() + " of " + parent.getName(), parent);
        //@@end
    Then you will get a menu at each tree node with an entry "Add Child" that adds a new child node with some generic text.
    Armin

  • Problem of refreshing a tree in web dynpro java

    hi all,
    I'm facing a problem for refreshing a tree in web dynpro java for SAP HR.
    I created a viewset with 2 cells( 1 view for each).
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    But when I select another unit ID, the tree is not changed and I know the context is well changed according to my selection.
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    Yimin

    May be u can write the code wdDoModify instead.
    -Ashutosh

  • Tree in web dynpro

    hi,
    I developed a web dynpro on the base of the WDT_TREE structure.
    Itu2019s important to underline that each node can contain different type of sons: ITEM and NODE as you can see in the structure below  
    For example:
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          Item 2  -> Nodeu2019s 1 son 
          Item 3  -> Nodeu2019s 1 son
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          Node2  -> Nodeu2019s 1 son
          Node3. -> Nodeu2019s 1 son
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          Node2 -> Nodeu2019s 1 son 
          Item 2 -> Nodeu2019s 1 son 
          Node3 -> Nodeu2019s 1 son 
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    hi Gunjan ,
    refer this article "ALV and Standard Table as Hierarchy in Web Dynpro ABAP" :
    http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/c060fcb4-2c62-2b10-d2b2-f32407a5cc6f&overridelayout=true
    also check the standard WD component salv_wd_demo_table_tree
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    "A) identify the table as hierarchy table:
    wd_this->go_table->if_salv_wd_table_settings~set_display_type( if_salv_wd_c_table_settings=>display_type_hierarchy).
    (wd_this->go_table is the reference to wd alv object:)
    "B) mark the columns you want to have as nodes with following statement:
    ls_col-r_column->if_salv_wd_column_hierarchy~set_hierarchy_column( value = abap_true ).
    (ls_col is reference to the column)
    regards,
    amit

  • Tree Structure in a CE Web Dynpro Table

    Hi,
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    I didn't find this TreeByNestingTableColumn, do you have any idea what i'm doing wrong?
    Thanks and Regards,
    Eduardo

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