for this in <b>oops ALV</b> you have to use EVENTS.
the <b>fallowing EVENTS and there usage is given.</b>
<b>button_click</b>
Query a click on a pushbutton in the ALV Grid Control
<b>double_click</b>
Query a double-click on a cell of the ALV Grid control
<b>hotspot_click</b>
Query a hotspot click on columns defined for this purpose in advance
<b>onDrag</b>
Collect information when elements of the ALV Grid Control are dragged
<b>toolbar</b>
Change, delete or add GUI elements in the toolbar
General Scheme for the Event Handler Class
Here is a sample code to illustrate a general scheme for local class.
<b>CLASS lcl_event_handler DEFINITION .</b>
PUBLIC SECTION .
METHODS:
*--To add new functional buttons to the ALV toolbar
handle_toolbar FOR EVENT toolbar OF cl_gui_alv_grid
IMPORTING e_object e_interactive ,
*--To implement user commands
handle_user_command
FOR EVENT user_command OF cl_gui_alv_grid
IMPORTING e_ucomm ,
*--Hotspot click control
handle_hotspot_click
FOR EVENT hotspot_click OF cl_gui_alv_grid
IMPORTING e_row_id e_column_id es_row_no ,
*--Double-click control
handle_double_click
FOR EVENT double_click OF cl_gui_alv_grid
IMPORTING e_row e_column ,
*--To be triggered before user commands
handle_before_user_command
FOR EVENT before_user_command OF cl_gui_alv_grid
IMPORTING e_ucomm ,
*--To be triggered after user commands
handle_after_user_command
FOR EVENT context_menu_request OF cl_gui_alv_grid
IMPORTING e_object
*--Controlling data changes when ALV Grid is editable
handle_data_changed
FOR EVENT data_changed OF cl_gui_alv_grid
IMPORTING er_data_changed ,
*--To be triggered after data changing is finished
handle_data_changed_finished
FOR EVENT data_changed_finished OF cl_gui_alv_grid
IMPORTING e_modified ,
*--To control menu buttons
handle_menu_button
FOR EVENT menu_button OF cl_gui_alv_grid
IMPORTING e_oject e_ucomm ,
*--To control button clicks
handle_button_click
FOR EVENT button_click OF cl_gui_alv_grid
IMPORTING e_oject e_ucomm .
PRIVATE SECTION.
ENDCLASS.
<b>CLASS lcl_event_handler IMPLEMENTATION .</b>
*--Handle Toolbar
METHOD handle_toolbar.
PERFORM handle_toolbar USING e_object e_interactive .
ENDMETHOD .
*--Handle Hotspot Click
METHOD handle_hotspot_click .
PERFORM handle_hotspot_click USING e_row_id e_column_id es_row_no .
ENDMETHOD .
*--Handle Double Click
METHOD handle_double_click .
PERFORM handle_double_click USING e_row e_column es_row_no .
ENDMETHOD .
*--Handle User Command
METHOD handle_user_command .
PERFORM handle_user_command USING e_ucomm .
ENDMETHOD.
*--Handle After User Command
METHOD handle_context_menu_request .
PERFORM handle_context_menu_request USING e_object .
ENDMETHOD.
*--Handle Before User Command
METHOD handle_before_user_command .
PERFORM handle_before_user_command USING e_ucomm .
ENDMETHOD .
*--Handle Data Changed
METHOD handle_data_changed .
PERFORM handle_data_changed USING er_data_changed .
ENDMETHOD.
*--Handle Data Changed Finished
METHOD handle_data_changed_finished .
PERFORM handle_data_changed_finished USING e_modified .
ENDMETHOD .
*--Handle Menu Buttons
METHOD handle_menu_button .
PERFORM handle_menu_button USING e_object e_ucomm .
ENDMETHOD .
*--Handle Button Click
METHOD handle_button_click .
PERFORM handle_button_click USING e_object e_ucomm .
ENDMETHOD .
ENDCLASS .
<b>Creating event handler instance and registering handler methods</b>
DATA gr_event_handler TYPE REF TO lcl_event_handler .
.. ..
*--Creating an instance for the event handler
CREATE OBJECT gr_event_handler .
*--Registering handler methods to handle ALV Grid events
SET HANDLER gr_event_handler->handle_user_command FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_toolbar FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_menu_button FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_double_click FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_hotspot_click FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_button_click FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_before_user_command
FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_context_menu_request
FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_data_changed FOR gr_alvgrid .
SET HANDLER gr_event_handler->handle_data_changed_finished
FOR gr_alvgrid .
<b>
Hotspot Clicking</b>
From field catalog field definitions, we know that we can make some columns to respond to single clicks as hotspots by setting the value for the field “HOTSPOT” to ‘X’ while generating the field catalog. After clicking, the event “hotspot_click” is triggered. This event has three parameters in its interface. The parameter “e_row_id” is obsolete. Other two parameters are “es_row_no” which is of type “LVC_S_ROID” and passes information about the row index at “es_row_no-row_id”, and “e_column_id” of type “LVC_S_COL” which returns the column fieldname at “e_column_id-fieldname”. Utilizing these parameters you know where the user clicked and trigger your action.
FORM handle_hotspot_click USING i_row_id TYPE lvc_s_row
i_column_id TYPE lvc_s_col
is_row_no TYPE lvc_s_roid.
READ TABLE gt_list INDEX is_row_no-row_id .
IF sy-subrc = 0 AND i_column_id-fieldname = 'SEATSOCC' .
CALL SCREEN 200 . "Details about passenger-seat matching
ENDIF .
ENDFORM .
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