Tuesday, 22 September 2015

Dynamic creation of UI element and Context attribute in Web Dynpro ABAP-2

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In this post UI elements like a Label and an input field is created dynamically and the input field is bound a context attribute created dynamically.



Create a web dynpro component.




 Layout set is flow layout.



 Go to the WDDOINIT method to create a context attribute dynamically.


Put the below code to create context attribute dynamically.


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METHOD wddoinit .
  DATA :
     lr_node_info TYPE REF TO if_wd_context_node_info,
     ls_attr_info TYPE        wdr_context_attribute_info.

  CALL METHOD wd_context->get_node_info
    RECEIVING
      node_info lr_node_info.

  ls_attr_info-name 'CARRID'.
  ls_attr_info-type_name 'S_CARR_ID'.
* CREATE A CONTEXT ATTRIBUTE
  CALL METHOD lr_node_info->add_attribute
    EXPORTING
      attribute_info ls_attr_info.

ENDMETHOD.
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To create dynamic UI element put the below code in WDDOMODIFYVIEW.



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METHOD wddomodifyview .
  DATA : lr_root_element TYPE REF TO if_wd_view_element,
         lr_container    TYPE REF TO cl_wd_uielement_container,
         lr_label        TYPE REF TO cl_wd_label,
         lr_input        TYPE REF TO cl_wd_input_field,
         lr_flow_data    TYPE REF TO cl_wd_flow_data.

  IF first_time = abap_true.

    CALL METHOD view->get_element
      EXPORTING
        id      = 'ROOTUIELEMENTCONTAINER'
      RECEIVING
        element = lr_root_element.

    lr_container ?= lr_root_element.

    CALL METHOD cl_wd_label=>new_label
      EXPORTING
        id        = 'L_FLIGHT_CODE'
        label_for = 'FLIGHT_CODE'
      RECEIVING
        control   = lr_label.

    CALL METHOD cl_wd_flow_data=>new_flow_data
      EXPORTING
        element = lr_label
      RECEIVING
        control = lr_flow_data.

    CALL METHOD lr_label->set_layout_data
      EXPORTING
        the_layout_data = lr_flow_data.

    CALL METHOD lr_container->add_child
      EXPORTING
       " index     = 1
        the_child = lr_label.

    CALL METHOD cl_wd_input_field=>new_input_field
      EXPORTING
        bind_value = 'CARRID'
        id         = 'FLIGHT_CODE'
      RECEIVING
        control    = lr_input.

    CALL METHOD cl_wd_flow_data=>new_flow_data
      EXPORTING
        element = lr_input
      RECEIVING
        control = lr_flow_data.

    CALL METHOD lr_input->set_layout_data
      EXPORTING
        the_layout_data = lr_flow_data.

    CALL METHOD lr_container->add_child
      EXPORTING
     "   index     = 2
        the_child = lr_input.

  ENDIF.
ENDMETHOD.
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Create an application and test.







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