>I have a question here. I built an application for downloading data from
>another device. In the application, I created an infinite loop for getting
>data all the time unless the user push "done" button in order to terminate
>the loop and finish downloading. I did the following steps for making
"done"
>button work. However, when I tested it, it didn't do anything. The infinite
>loop was still running.
>
>static Boolean ldu_handler(EventPtr event)
>{
> .....
> case ctlSelectEvent:
> if (event->data.ctlEnter.controlID == buttonID_ldu_done)
> {
> runLoop = 0;
> FrmGotoForm(formID_main);
> handled = 1;
> }
> break;
> .....
> return handled;
>}
>
>static void do_channel()
>{
> runLoop = 1;
> while (runLoop)
>
> .....
> }
>}
PalmOS is (essentially) a single-threaded system. Your form handler cannot
be called while you are in an infinite loop, since your loop has exclusive
control. You have a couple of choices:
1. Don't use infinite loops.
2. Check for events within your infinite loop.
Doing #2 goes something like this:
while (runLoop)
{
if (EvtEventAvail())
{
EventType event;
EvtGetEvent(&event, 0);
if (event.type == ctlSelectEvent)
{
if (event.data.ctlEnter.controlID == buttonID_ldu_done)
runLoop = 0;
}
}
}
FrmGotoForm(formID_main); // loop done; goto main form
---- --- -- -
Matthew D Moss
[EMAIL PROTECTED]
