Re: Help... How to get low-level system event

[krollin]

>From the release notes for 3.0a5:

*    "Pen" events are essentially created as needed and inserted into
     the Palm OS on demand from mouse events by way of a patch on the
     SysEventGet function.  However, until now, there was no
     corresponding patch to EvtSysEventAvail to make that function return
     true if the host mouse was down.  Now there is.  [Michael Nordstrom]

-- Keith Rollin
-- Palm OS Emulator engineer






Feng Wang <[EMAIL PROTECTED]> on 03/15/2000 02:20:18 PM

Please respond to "Palm Developer Forum" <[EMAIL PROTECTED]>

Sent by:  Feng Wang <[EMAIL PROTECTED]>


To:   "Palm Developer Forum" <[EMAIL PROTECTED]>
cc:    (Keith Rollin/HQ/3Com)
Subject:  Help... How to get low-level system event




Hello,

I run my application with serial communication on the emulator, in
which a do-while loop is used to read  and write data by the serial port. It
looks like working. However, all the icons and the command button on the
screen are disabled, that is, when I click the icons and the command button,
nothing happens. The following is my code,

do{
     if(err == serErrLineErr)
     {
          SerReceiveFlush(eSerialRefNum, 1);
          continue;
     }

     err = SerReceiveCheck(eSerialRefNum, &numBytesPending);
     if(err == serErrLineErr)
     {
          SerReceiveFlush(eSerialRefNum, 1);
          continue;
     }

     ErrFatalDisplayIf(err != 0, "SerReceiveCheckFail");

     if(numBytesPending > 12)
     {
          numBytes = SerReceive(eSerialRefNum, theData,
numBytesPending, 0, &err);
          if(err == serErrLineErr)
          {
               SerReceiveFlush(eSerialRefNum, 1);
               continue;

          }

          //processing the data
          correctReading = true;
     }

}while(!correctReading && !EvtSysEventAvail(false));

and I tried to use EvtSysEventAvail() to get the icon or command button
event, but it does not work.
If I comment this do-while loop, the icon and button work.
I use Code Warrior R6, the Palm OS v3.1 that is uploaded from my Palm IIIe
and the Emulator 3.0a4 Win.

Could you give me your idea to resolve the problem?

Feng Wang
Email:  [EMAIL PROTECTED]


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