Re: Processing of WHEN-NEW-ITEM-INSTANCE FORMS4.5

try using the debugger and step through it to clarify your questions

In article <4909lc$8kr_at_dub-news-svc-4.compuserve.com>, 100704.1155_at_compuserve.com says...
>
>FORMS 4.5.6.0.7
>
>I am struggling to understand the precise circumstances under
>which the WHEN-NEW-ITEM-INSTANCE trigger fires.
>
>My interpretation of the reference manual and the processing
>flow-charts indicate that it should fire when BOTH the the
>following conditions are true:-
>
>a) The trigger process is 'Returning for Input' AND
>
>b) the value of cursor item differs from the value it
> held on the last occasion that the 'Return for Input'
> process executed.
>
>
>
>However, I find this interpretation at odds with the observed
>behavior. I would expect the following trigger to fire just once
>whenever the user navigates ordinarily to block1.item1.
>
>
>WHEN-NEW-ITEM-INSTANCE (attached to block1.item1)
>
>
>begin
>
> go_item('block2.item1');
>
> go_item('block1.item1');
>
>end;
>
>
>However, I find that what actually happens is that the
>form fires the WHEN-NEW-INSTANCE-TRIGGER ad infinitum
> - presumably because the go_item('block1.item1) is
>(unexpectedly) causing the trigger to re-fire!
>
>
>The same code as a WHEN-NEW-BLOCK-INSTANCE trigger,
>fires only once (as I would expect).
>
>
>Questions
>
> a) Am I mis-understanding the trigger processing
> here, or is this a bug.
>
> b) The processing flow-charts indicate that the
> 'Return for Input' process executes as part of
> the 'Put Cursor At' process which itself is invoked
> by many of Built-ins.
>
> Am I right in assuming that the 'Return for Input'
> process does NOT execute when invoked from a built-in
> operating as part of a sequence of statements in
> a trigger?
>
>c) Does any-one know of a more up-to-date/accurate
> description of the Forms trigger processing model
> than the ORACLE reference?
>
>
>
>Thanks.
Received on Sun Nov 26 1995 - 00:00:00 CET