Compare values in list box

Question

Hi,
I need to compare initial and current value in the list box. I' am trying to do the comparison in onSelect event.
Here how can I get the initial value. I guess we will get the current value here. Or let me know if you have
some better suggestions.
Thanks,
Aravind

Answer 1

In your approach of temp variable, you will have to keep refreshing your variable with the new value in the OnSelect Method.
For eg: l_temp is initially set in WDDOINIT, now you compare this with the new selected value in the OnSelect method and after displaying the appropriate message you will again have to reset l_temp with the newly selected value.
" note: I hope l_temp is declared in the attributes tab of the View
If you wish to implement Context Change log, follow these steps;
1. Place the following code in the WDDOINIT method of the Component Controller
* enable context change log
    data: context type ref to if_wd_context.
    context = wd_context->get_context( ).
    context->enable_context_change_log( ).
2. Create a new method 'GET_CHANGE_LOG' in the Component Controller's Methods Tab
" Create a Returning Parameter 'CHANGES'  type WDR_CONTEXT_CHANGE_LIST
method get_change_log .
    data: context type ref to if_wd_context.
    context = wd_context->get_context( ).
    changes = context->get_context_change_log( ).
endmethod.
3. When you want to track the changes call his this method as follows,
DATA: l_ref_componentcontroller TYPE REF TO ig_componentcontroller .
    DATA: l_changes TYPE wdr_context_change_list.
    l_ref_componentcontroller =   wd_this->get_componentcontroller_ctr( ).
    l_changes = l_ref_componentcontroller->get_change_log( ).
"  l_changes will contain all the details of the changes made.
For more details refer component DEMO_CONTEXT_CHANGES.
Regards,
Radhika.