topic Re: Getting the objects for a class in Application Development and Automation Discussions

Getting the objects for a class

Former Member — Wed, 09 May 2007 12:04:01 GMT

I am able to get all live classes of a dynpro by using method cl_gui_cfw=>get_living_dynpro_controls. (Also thanks to this forum).

The resulting table has a reference to a class like ...

How do I use this reference to:

1. Get the objects for it?

2. How can I then free the object from memory by using the "free" method.

I guess I am asking how to dynamically assign it, then make sure it has a free method and then to use the method to actually free it.

Re: Getting the objects for a class

uwe_schieferstein — Wed, 09 May 2007 12:17:22 GMT

Hello Johan

Method cl_gui_cfw=>get_living_dynpro_controls return the living control instance in a table type CNTO_CONTROL_LIST (TYPE REF TO CL_GUI_CONTROL OCCURS 0, type-pool CNTO).

Thus, simply loop over the itab because CL_GUI_CONTROL is the superclass of all other GUI controls:

DATA:
  lo_control    TYPE REF TO cl_gui_control,
  lt_controls   TYPE cnto_control_list.

" lt_controls contains the living control instances

  LOOP AT lt_controls INTO lo_control.
    lo_control->free( ).
  ENDLOOP.

Regards

Uwe

Re: Getting the objects for a class

Former Member — Wed, 09 May 2007 12:47:05 GMT

Hello Uwe

My first reaction was "NO it cannot be that easy!!". It almost was but on the second line I get a short dump. Then I realised why: the other live control in the table was a sub class of the first class and as a result it was cleared on the first call.

So I modified the call to be a recursive call (of the form) as follows...

form clear_live_controls .
DATA:
  gt_list       TYPE cnto_control_list,
  gt_wa like line of gt_list.

  REFRESH: gt_list.
  CALL METHOD cl_gui_cfw=>get_living_dynpro_controls
    IMPORTING
      control_list = gt_list.
  describe table gt_list lines tab_lines.
  if tab_lines = 0.
*    Nothing
  else.
     loop at gt_list into gt_wa.
       gt_wa->free( ).
       exit.
     endloop.
     perform clear_live_controls.
  endif.
endform.                    " clear_live_controls

This took care of it.

Many thanks for your help.

Regards