setting condition for UI element in web dynpro

[Former Member]

Hi guys,

Is there any way to load a UI element based on a condition.

i.e., if the condition is true then that particular UI element is loaded, else nothing.

Pls don't tell me to make it invisible, even if invisible that particular UI element is loaded but not displayed.

I don't want to load that UI element.

actually my scenario is....

my web dynpro app will have only one view.

It consists of a button and an interactive form.

On clicking the button the interactive form should be loaded.

But since both botton and IF( interactive form container) are in same view, both will be loaded at same time.

the xstring attribute needed for IF will be populated only after clicking the button.

but before clicking the button IF is loading, since xstring is initial it will throw an error.

even if I kept it as invisible, still getting the same error, means it was still loading.

Is there any way to load an UI element based up on a condition in abap web dynpro  ....????

[chengalarayulu]

Vishnu,

you must create an InteractiveForm UI element dynamically. check the below thread, you may get some idea.

http://scn.sap.com/message/13235420#13235420

[Former Member]

Guys,

I know we can create UI elements dynamicaly,

But my question is whether we can disable and enable that UI element dynamically ..??

It is possible in JAVA web Dynpro...

Is that possible in ABAP Web dynpro ...??

I just want to enable or disable that UI element, not visible or invisible..

I hope there will be some way to do it.

pls correct me if I am wrong..

[Former Member]

Hi Vishnu,

Try this alternate way rather than creating UI element dynamically , we can display view dynamically.

Here what is your scenario is to display only button first time view is loaded. For that u can take  view container UI element  and button in a main view.

create two view  first should have no design at all. and another should contain your IF container.

So embed these two views in the  view continer ui element. And make the First  blank view as default view.

Create  Inbound and outbound plugs  for main view to  Second view containing FI element.

And in the action method of  button write the code to fire the outbound plug.

Hope U will get ur requirements.

Thanks

Santosh

[Former Member]

guys thanks a lot for your quick replies ..

I had already thought of applying those techniques which you mentioned ..

I know they will work pretty well.

But, i wanna know whether we can set a condition to skip loading of IF container for first time.

If yes then where we should write it...??

[Former Member]

Hi Vishnu,

I think , Phani  is right.

You can dynamically create UI elements based on the condition. But code to create UI element dymanically should be written in wddomodifyview method because it should be executed after button press. And here you can put condition If condition is true then only it will be executed otherwise not(put all code in IF...ENDIF statement).

Check the link below.

http://wiki.sdn.sap.com/wiki/display/WDABAP/Creating+UI+Elements+Dynamically+in+Abap+Webdynpro+Appli...

In that How to create table dynamically is explained. You can use this code as a guide for creating IF Container dynamically. Use  CREATE_FORM_FROM_NODE method of class

CL_WD_DYNAMIC_TOOL in place of CREATE_TABLE_FROM_NODE method.

Please let me know if it works.

Thanks

santosh

[Former Member]

Hi Vishnu,

As Phani suggested, you can dynamically create UI elements on button click.

Declare an attribute say GV_VIEW TYPE REF TO IF_WD_VIEW in the view in which you need both the button and interractive form container.

Go to method WDDOMODIFYVIEW and add the following code:

  IF FIRST_TIME = ABAP_TRUE.
       WD_THIS->GV_VIEW = VIEW.
  ENDIF.

Go to the Event Handler method for the button and add the code to dynamically add the container. Here is a small example to add another button on the button click:

  DATA:      lv_button  TYPE REF TO cl_wd_button,
                 l_root   TYPE REF TO cl_wd_uielement_container.

  DATA       lv_button_flow TYPE REF TO cl_wd_flow_data.

  l_root ?= wd_this->gv_view->get_root_element( ).

  CALL METHOD cl_wd_button=>new_button
    EXPORTING
      id        = 'BUTTON'
      on_action = 'GET_DATA'
      text      = 'Dependent'
    RECEIVING
      control   = lv_button.

  CALL METHOD cl_wd_flow_data=>new_flow_data
    EXPORTING
      element = lv_button
    RECEIVING
      control = lv_button_flow.

    l_root->add_child( the_child = lv_button ).

Note: Use flags so that once the UI element is created, this code is not triggered.

Hope the above analysis helps. Please let me know if you need any further inputs.

Regards,

Sayan

[Former Member]

You can dynamically create UI elements based on the condition.

Thanks

Phani