topic Dynamic Method Call in Application Development and Automation Discussions

Dynamic Method Call

Former Member — Tue, 03 Oct 2006 12:10:44 GMT

I have a procedure that frees GUI controls. I have a lot of controls, and rather than have many procedures, I'd like to have 1 procedure that I call, passing an object reference.

It doesn't appear that through dynamic method call, I can do this with an instance method.

Can someone suggest a way to do this, without having a procedure for each control?


<b>* I want to pass g_r_editor as a parameter</b>
IF NOT g_r_editor IS INITIAL.
    CALL METHOD g_r_editor->free
      EXCEPTIONS
        cntl_error        = 1
        cntl_system_error = 2
        OTHERS            = 3.
    IF sy-subrc NE 0.
      CALL FUNCTION 'POPUP_TO_INFORM'
        EXPORTING
          titel = text-011
          txt2  = space
          txt1  = text-005.
    ENDIF.
    FREE g_r_editor.
  ENDIF.

<b>Dynamic Method Call doc</b>

<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm">http://help.sap.com/saphelp_nw2004s/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm</a>

Re: Dynamic Method Call

uwe_schieferstein — Tue, 03 Oct 2006 13:20:05 GMT

Hello Bjorn

I would suggest the following approach:

(1) Collect all your GUI control instances in an itab whose line type is TYPE REF TO cl_gui_control.

(2) Define your "free" method:

LOOP AT mt_gui_controls INTO lo_gui_control.
* See if gui control was text editor
  TRY.
    lo_textedit ?= lo_gui_control.
  CATCH cx_sy_move_cast_error INTO lo_error.
  ENDTRY.

  IF ( lo_error IS NOT BOUND ).
    lo_textedit->free.
*   ... your coding
    CONTINUE.
  ENDIF.


* See if gui control was tree
  TRY.
    lo_tree ?= lo_gui_control.
  CATCH cx_sy_move_cast_error INTO lo_error.
  ENDTRY.
* ...
ENDLOOP.

The FREE methods are redefined in the subclasses. However, you could try to call lo_gui_control->free directly because I am not sure if the coding of the superclass or subclass is called (I cannot test this at the moment).

Regards

Uwe

Re: Dynamic Method Call

Former Member — Tue, 03 Oct 2006 13:23:23 GMT

Thanks. I ended up doing something similar. Since all the objects are subclasses, I don't think I need to worry about casting errors.


...
  l_r_control = g_r_editor.
  PERFORM free_controls
    USING
      l_r_control.
...

FORM free_controls
  USING
     p_r_control TYPE REF TO cl_gui_control.

  IF NOT p_r_control IS INITIAL.
    CALL METHOD p_r_control->free
      EXCEPTIONS
        cntl_error        = 1
        cntl_system_error = 2
        OTHERS            = 3.
    IF sy-subrc NE 0.
      CALL FUNCTION 'POPUP_TO_INFORM'
        EXPORTING
          titel = text-011
          txt2  = space
          txt1  = text-002.
    ENDIF.
  ENDIF.
ENDFORM.                    "free_controls