ALV Grid with Popup Window

Hey @all,
I want to make a ALV Grid with a Popup Window. The idea is that there is a field for notes and when you click on this field a popup window should be opened where you can insert more text or if text already exists only the first column of the text is shown in field until you click on the field.
Is there any possibility to do it this way? Do I have to make a second Grid for this Popup Window? Do anybody have an example how to solve this problem?
Thank you in advance for your answers!
Greetings,
Alexander

*& Report  Z_VISHVAS_ALV1
report  z_vishvas_alv1.
type-pools: slis.
data: begin of i_outtab occurs 0.
        include structure sflight.
data:   w_chk type c.                  "For multiple selection
data: end of i_outtab.
      I_OUTTAB TYPE SFLIGHT OCCURS 0,
data: i_private type slis_data_caller_exit,
      i_selfield type slis_selfield,
      w_exit(1) type c.
parameters: p_title type sy-title.
start-of-selection.
  select * from sflight into table i_outtab.
  call function 'REUSE_ALV_POPUP_TO_SELECT'
       exporting
            i_title                 = p_title
            i_selection             = 'X'
            i_zebra                 = 'X'
          I_SCREEN_START_COLUMN   = 0
          I_SCREEN_START_LINE     = 0
          I_SCREEN_END_COLUMN     = 0
          I_SCREEN_END_LINE       = 0
            i_checkbox_fieldname    = 'W_CHK'
          I_LINEMARK_FIELDNAME    =
          I_SCROLL_TO_SEL_LINE    = 'X'
            i_tabname               = 'I_OUTTAB'
            i_structure_name        = 'SFLIGHT'
          IT_FIELDCAT             =
          IT_EXCLUDING            =
          I_CALLBACK_PROGRAM      =
          I_CALLBACK_USER_COMMAND =
           IS_PRIVATE             = I_PRIVATE
     importing
            es_selfield             = i_selfield
            e_exit                  = w_exit
       tables
            t_outtab                = i_outtab
       exceptions
            program_error           = 1
            others                  = 2.
  if sy-subrc <> 0.
   MESSAGE i000(0k) WITH sy-subrc.
  endif.
*****the internal table is modified with a cross sign for marking the
***rows selected
  loop at i_outtab where w_chk = 'X'.
    write: /  i_outtab-carrid, i_outtab-price.
  endloop.

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