Re: Handling the contrast button on Palm V and Palm IIIx

[Gearoid Murphy]

What about doing something like the following? In your application, re-map 
the contrast button so that it launches some application (e.g. Calc) using 
PrefSetPreference.

Create a global variable that delermines whether or not you allow an exit 
from your application:

Boolean bAllowAppExit;

Then whenever you show an alert or calender etc make sure that the variable 
is set to false. In your event loop, stipulate that this variable must be 
set to true to allow an AppStop event:

  do
  {
        EvtGetEvent( &event, 2000 );
       // more code
  }while(event.eType != appStopEvent || bAllowAppExit==false);

I know its convoluted but it should work. I used it to prevent a user from 
exiting my application during a FrmCustomAlert type situation.

Regards,

Ger






From: Ralf Dietrich <[EMAIL PROTECTED]>
Reply-To: "Palm Developer Forum" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Subject: Re: Handling the contrast button on Palm V and Palm IIIx
Date: Thu, 27 Mar 2003 12:43:31 +0100
Prashant Jha wrote:
But the problem is that it works when we have a
regular form on the screen, but not when we have an
alert box or a date picker on top of the form. This is
the real issue. The application crashes when we press
the contrast adjustment button while there is an alert
box open on top of my screen.
Does anyone have any ideas?
The cause is that FrmCustomAlert() has its own event handler, and you can't 
filter on your EventLoop(). I have notice this behavior in my application 
that changes the LCD-controler of the palm, so that these message box does 
not appear on the screen. The only solution is that you switch to a 
"safe"-mode, before calling these routines...

Ralf Dietrich

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