The windows causing the problem are my graphs redrawn frequently and are sufficient in my application. Is there any safer approach to handle such graph windows?
----- Original Message ----- From: "Ben Combee" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Sunday, December 15, 2002 2:45 PM Subject: Re: Windows cannot be under forms > At 11:20 2002-12-15 +0300, you wrote: > >I'm having the "Windows cannot be under forms because they can't be redrawn" > >SysFatalAlert from POSE 3.5. The error occurs as one launches Find and then > >hits any button on the Find dialog box. It is clear that the windows have to > >be closed first but what is the Find launch event to handle the windows > >properly, and how to resume the application interrupted after Find finished? > > First, it isn't POSE that's complaining, its the debug build of Palm OS. > > The reason for this error is due to how forms redraw themselves. In > release versions of the OS, the system tries to save a copy of the screen > under the Find dialog, and will restore from that when its dismissed. If > memory is low, the system won't save the image, but will ask the forms > under the find dialog to redraw themselves when the dialog is > dismissed. To help you debug this situation, the debug builds of the OS > always use the redraw events. > > For this redraw to work, your stack of windows must all be forms, since > only forms have event handlers. In general, Palm OS doesn't really handle > independent windows that aren't also forms, except for special cases, like > list popups and menus. So, since you're using a non-form window, the OS > can't redraw things correctly when the find dialog goes away. > > Since find is always launched by a virtual character keyDown event, you > could trap that and dismiss your window first before allowing it, or you > could consider why you're using a non-form window in the first place, and > maybe reorganize your application. > > -- > Ben Combee <[EMAIL PROTECTED]> > CodeWarrior for Palm OS technical lead > Palm OS programming help @ www.palmoswerks.com > > > -- > For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
