ABAPblog.com - Characteristic's own input screen - Part 1

Welcome back :-)
Some time ago I presented how I get data from classifications to reference data variable ( or table). If you feel comfortable with my method then we can go further. I had a task to update some characteristic values from ALV grid, this would be not a problem at all if the characteristics would be defined from the begriming, but they weren't. In that case I couldn't just add needed fields to fieldcatalog and call FM to update characteristics when save button was pressed. I realized I need dynamic structure for ALV which will call standard screen for characteristic update. If this could be done then I could omit carrying about type of characteristics (date, number, char ) and if it is single o multiple type. So I started to dig in SAP, debug standard functions and I was finally able to prepare all needed functions.

So firstly what was needed (additionally to previously presented methods):

- method to show standard characteristics update screen with possibility to put there own values at call
- method to copy data from my reference data structure to screen values

- method to copy data from screen (after input) to my reference data structure

- method to copy data from my reference data structure to bapi tables (in order to save it)

- method to save characteristic value

- method to convert values from standard type (date, char, number, currency) to characteristic value (in float)

- method to clear initial line which was appearing when standard screen was called without reference to database values.

In this and following parts of this tutorial you'll see all mentioned methods and example of their usage. You can also find the code in attached NUGG file for easier import to your system.

Ok so let's start with simple method to convert values from standard type to characteristic value. This method is needed because if you look into characteristic values table you'll see it's stored in floating point type.

Importing:

I_ATNAM Type API_VALUE-ATNAM -> Characteristic Name
I_VALUE_NEW Type ANY -> Characteristic Value

Returning:

R_VALUE_FLOAT Type -> Internal floating point from

Implementation:

  method convert_char_value.
    data: m_value_new type atwtb.

    write i_value_new to m_value_new.

    call function 'CHAR_VALUE_CHANGE2'
      exporting
*       atinn                  = ft_values-atinn
        atnam                  = i_atnam
        new_value              = m_value_new
*       FLAG_NO_DIALOG         = FLAG_NO_DIALOG
      importing
*       atwrt                  = r_value_float
        atflv                  = r_value_float
      exceptions
        characteristic_unknown = 1
        conversion_error       = 2
        value_set_error        = 3
        others                 = 4.
    if sy-subrc eq 0.
      return.
    endif.

  endmethod.                    "convert_char_value

Ok, so we have one simple method ready, in next part one old trick will be needed.

Characteristic's own input screen - Part 1 - Convert Values To Float

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