write new text in container while the old one on read only

[aboooood]

Hello Experts,

so i have a container where i can write i text in it and now if i save like 4 lines.

if someone want to write new line he can see the old one (4 lines) but cant edit it.

if i use cl_gui_textedit it will edit all the text.

is there anyway to solve this?

  IF gc_container IS NOT INITIAL.
    CALL METHOD gc_container->free.
    FREE: gc_container.
  ENDIF.

  IF gc_text_edit IS NOT INITIAL.
    CALL METHOD gc_text_edit->free.
    FREE: gc_text_edit.
  ENDIF.

  CREATE OBJECT gc_container
    EXPORTING
      container_name = 'LC_CUST_TEXT'.

  CREATE OBJECT gc_text_edit
    EXPORTING
      parent                     = gc_container
      wordwrap_mode              = cl_gui_textedit=>wordwrap_at_fixed_position
*     wordwrap_to_linebreak_mode = cl_gui_textedit=>false
      wordwrap_to_linebreak_mode = cl_gui_textedit=>true "INS THHE
      wordwrap_position          = g_line_length
    EXCEPTIONS
      OTHERS                     = 1.

  IF gv_display = 'X'.
    CALL METHOD gc_text_edit->set_readonly_mode.
  ENDIF.

  CALL METHOD gc_text_edit->set_toolbar_mode
    EXPORTING
      toolbar_mode           = 0
    EXCEPTIONS
      error_cntl_call_method = 1
      invalid_parameter      = 2
      OTHERS                 = 3.

  CALL METHOD gc_text_edit->set_statusbar_mode
    EXPORTING
      statusbar_mode         = cl_gui_textedit=>false
    EXCEPTIONS
      error_cntl_call_method = 1
      invalid_parameter      = 2
      OTHERS                 = 3.

  CLEAR: lt_lines[], ls_lines, gt_table[].

  CALL FUNCTION 'ZWF1_NM1_TEXT_READ'
    EXPORTING
      iv_vbeln = gv_vbeln
      iv_chano = gv_chgno
      iv_all   = ' '
    TABLES
      lines    = lt_lines.

  LOOP AT lt_lines INTO ls_lines.
    APPEND ls_lines-tdline TO gt_table.
  ENDLOOP.

  CALL METHOD gc_text_edit->set_text_as_r3table
    EXPORTING
      table           = gt_table
    EXCEPTIONS
      error_dp        = 1
      error_dp_create = 2
      OTHERS          = 3.

[raymond_giuseppi]

You could 'protect' the already existing lines, check method PROTECT_LINES (online help)