Hi Peter,
Before using the FrmCustomAlert, at least one form should be
active otherwise you will get this error. If it is not the case send me your
appstop code so that i can try my best.
thnx
nag
----- Original Message -----
From: Peter Laakmann <[EMAIL PROTECTED]>
To: Palm Developer Forum <[EMAIL PROTECTED]>
Sent: Friday, October 19, 2001 6:02 AM
Subject: Error AFTER ignoring AppStopEvent in eventloop while an Alert
dialog is being shown...
> Hello all,
>
> I'm having a curious problem. My application needs to trap appStopEvents
> in all but a few enumerated forms (I have a good reason to do so). When
> the user tries to exit the application, it will instruct them to go back
to
> the Main Menu and exit from there, with an Alert Dialog (e.g.,
> FrmCustomAlert). This works beautifully in all the forms, however my
> application will crash with a memory error (not in my own code--at least
> not according to debug) when:
>
> A) I have an Alert Dialog (e.g., FrmCustomAlert) on the screen.
>
> B) The user generates an appStopEvent.
>
> C) I ignore the appStopEvent in the eventloop
>
> D) I popup ANOTHER Alert Dialog in response- (tells the user why they
can't
> exit and how to do so). When I don't do this, as in merely comment out
> that line, none of this happens!!!!!
>
> After this:
>
> A) The screen gets messed up. Form objects from the prior form (the one
> that was partially visible during the appStopEvent) are visible on the new
> one (as in the Main Screen).
>
> B) When I move to other forms in my application, POSE crashes with a
> memory error, saying that the application just read from an unallocated
> chunk of memory. Also while this happens, I see part of the form where I
> called the Alert dialog from (and maybe a field selected). Now I know
this
> particular memory error is not in my own code per se, it seems to be the
> form or field manager or something to that effect that is trying to read
> from the original form, even though it no longer exists (or does it?)
>
>
>
> In any event, does anyone have any idea what the problem could be? How I
> could work around it or fix the problem? Is there a better way to achieve
> the same thing?
>
> Any help will be greatly appreciated.
>
> Thanks
>
>
> Although I'm quit sure the problem isn't in my event loop (besides the
> stated issue). This is my event loop:
>
>
> static void AppEventLoop(void)
> {
> UInt16 error;
> EventType event;
>
> do {
> EvtGetEvent(&event, evtWaitForever);
>
> if (! SysHandleEvent(&event))
> if (! MenuHandleEvent(0, &event, &error))
> if (! AppHandleEvent(&event))
> FrmDispatchEvent(&event);
> } while (!QuitApplication &&
> (event.eType!=appStopEvent||!ChooseToQuit(event.eType)));
> }
>
>
> static Boolean ChooseToQuit(eventsEnum eType)
> {
>
> switch(FrmGetActiveFormID()) {
> case MainForm:
> return true;
> break;
> case RegistrationForm:
> return true;
> break;
> default:
> // when this isn't commented out, everything crashes
> // when it is, I have no problems
> AlertUserWithString("You must return to Main Menu, then press the
> button, to exit!");
> return false;
> break;
> }
>
> }
>
>
>
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