ALV OOP- Catching the event when the user clicks a cell

Question

Hi Experts,
i have 2 alvs to display using custom containers, now the problem is that i need to make some lines uneditable and some lines editable. On making this i find that ALV does not offer this functionality of selective editable rows, right? I offered a workaround by just popping an error message if a user clicks a row which suppose to be disabled/uneditable. My problem is that how can i catch the single click event in ALV using OOP?
Thanks to replies and points will be given...

Answer 1

hi,
hope this helps.
creating Editable Cells in ALV
Making a column editable in ALV:
IT_FIELDCAT is an internal table which has the structure of the data to be displayed. Each row in this internal table creates a column in ALV. The fieldcat structure has an optional field u2018EDITu2019 which is not required to be passed all the time. By default the column is non-editable. If the value of the field EDIT is u2018Xu2019, that column becomes editable in the display.
Example:
  wa_fieldcat-fieldname = 'CHECK'.
  wa_fieldcat-edit      = 'X'.
  wa_fieldcat-coltext   = 'Delete'.
  APPEND wa_fieldcat TO it_fieldcat.
  CLEAR wa_fieldcat.
The column DELETE in the ALV display is editable. The corresponding output internal table field name is CHECK.
Making individual cells editable or non-editable:
1.     Include an internal table of type lvc_t_styl in the output internal table (as a field) of the ALV. This inner table is like other output fields of the internal table.
Example:
TYPES: BEGIN OF tt_project,
            check TYPE c,
            status(132) TYPE c,
            it_styletab TYPE lvc_t_styl.       
TYPES: END OF tt_project.
2.     This inner internal table controls the style of each cell in the row of the output internal table.
3.     Same like other fields of the output internal table, this style table (inner internal table) should be filled for each row of the table.
4.     The structure of the output internal table.
CHECK     STATUS     IT_STYLETAB
X     ABC     Fieldname     Style
CHECK     Non-editable(MC_STYLE_DISABLED)
STATUS     editable(MC_STYLE_ENABLED)
     CDF     Fieldname     Style
     Non-editable(MC_STYLE_DISABLED)
      wa_stylerow-fieldname = u2018CHECKu2019. -
> Optional
      wa_stylerow-style =  cl_gui_alv_grid=>mc_style_disabled. (Non-editable)
      or
      wa_stylerow-style =  cl_gui_alv_grid=>mc_style_enabled.  (Editable)
      Append wa_stylerow to wa_project-it_styletab.
     Wa_stylerow is a work area for IT_STYLETAB.
       Wa_project is work area for output internal table.
5.     Refresh the inner internal table for each row in outer internal table.
6.     If the fieldname is not provided for the style internal table, the entire row becomes editable or non-editable.
7.     This provides the ability to enable input for a cell dynamically.
8.     The layout of the ALV Grid should also be changed in order to achieve this. The layout has a parameter, u2018STYLENAMEu2019. The name of the style internal table should be given as the value for this field. The layout should be passed in SET_TABLE_FOR_FIRST_DISPLAY.
     Example:
     wa_layout-stylefname = 'IT_STYLETAB'.
reward if useful.
regards
srishti