Setting check box (in detail block) as (non) updatable...

Question

Hi,
I have a master-detail form. The form does execute a query when it opens. Now, according to a condition i want to do the check box(in detail block) as non- updatable.
I have tried to write the appropriate code in:
WHEN-NEW-RECORD-INSTANCE(in the master block level)
WHEN-NEW-ITEM-INSTANCE (in the detail block level)
POST-QUERY(in the detail block level)
but it does not work 'perfectly'. I mean that in most cases even one of the above triggers does not execute (for example the 'WHEN-NEW-RECORD-INSTANCE' but only after i click on this new record instance. I mean that after this on this new record the condition is estimated....)
or
it does execute but after i click on the checkbox (for example the 'WHEN-NEW-ITEM-INSTANCE').
The code i tried looks like the following:
if :block.item=<condition>
then
  set_item_property ('detail_block.chk_box',updatable,property_false);
else
set_item_property ('detail_block.chk_box',updatable,property_true);
end if;I consider to use the WHEN-CHECKBOX-CHANGED trigger and code which looks like:
if <condition>=true
then
    /*i set the value of the checkbox as the opposite of what it is just after the click on it...*/
  if :detail_block.chk_box=0
   then
     :detail_block.chk_box=1;
  else
    :detail_block.chk_box=0;
  end if;
  set_record_property(currect_record,status,query_status);
  set_item_property ('detail_block.chk_box',updatable,property_false);
end if;The truth is that i do not like very much this code, but is there any alternative...???
Note: I use Dev6i with patch 12
Thank you,
Sim

Answer 1

I build a little testform based on HR-schema-table DEMO_USERS and switch each second record to be not updateable, works without problems (code from POST-QUERY-trigger):
DEFAULT_VALUE('1', 'GLOBAL.SWITCH');
:GLOBAL.SWITCH:=3-:GLOBAL.SWITCH;
IF :GLOBAL.SWITCH=2 THEN
  SET_ITEM_INSTANCE_PROPERTY('DEMO_USERS.ADMIN_USER', TO_NUMBER(:SYSTEM.TRIGGER_RECORD), UPDATE_ALLOWED, PROPERTY_TRUE);
ELSE     
  SET_ITEM_INSTANCE_PROPERTY('DEMO_USERS.ADMIN_USER', TO_NUMBER(:SYSTEM.TRIGGER_RECORD), UPDATE_ALLOWED, PROPERTY_FALSE);
END IF;     Edited by: Andreas Weiden on 31.03.2009 21:24