ABAP_to_the_Future

Editing Data 10.4
SAP class CL_SALV_MODEL_LIST, but the problem is that the grid instance is private
and thus cannot be read.
To get around this, create a new class: ZCL_SALV_MODEL, inheriting from CL_SALV_
MODEL_LIST. Then give this new class a private attribute, MO_MODEL, which is typed
as an instance of CL_SALV_MODEL. This attribute is populated during construction,
as shown in Listing 10.28. The actual value coming in will be a model object that
knows all about the SALV report object.
METHOD constructor.
super->constructor( ).
mo_model = io_model.
ENDMETHOD.
Listing 10.28 Adding the Standard SALV Model to a Custom Class
10.4.2 Changing the Initialization Method of
ZCL_BC_VIEW_SALV_TABLE
Section 10.4.1 explained the process of adding an attribute, MO_SALV_MODEL, to the
custom SALV view class. Now change the end of the INITIALIZE method in order
to link the CL_SALV_TABLE instance with the CL_SALV_MODEL instance object (Listing
10.29).
set_handlers( ).
DATA: lo_salv_model TYPE REF TO cl_salv_model.
"Narrow casting
"CL_SALV_MODEL is a superclass of CL_SALV_TABLE
"Target = LO_SALV_MODEL = CL_SALV_MODEL
"Source = MO_ALV_GRID = CL_SALV_TABLE
lo_salv_model ?= mo_alv_grid.
"Object to access underlying CL_GUI_ALV_GRID
CREATE OBJECT mo_salv_model
EXPORTING io_model = lo_salv_model.
Listing 10.29 Changing the INITIALIZE Method to Store an ALV Grid Object
10.4.3 Adding a Method to Retrieve the Underlying Grid Object
In the class ZCL_SALV_MODEL, add a method called GET_ALV_GRID, which returns an
instance of CL_GUI_ALV_GRID. In Listing 10.30, the instance MO_MODEL is linked to
the SALV report object. You now have a lovely MVC construct. The view in this
449