Handling events in stopwatch-like dialog

[Luc Le Blanc]

I'm trying to setup a stopwatch-like dialog where I have a Start/Stop 
button, and an OK button. When the Start button is hit, I start 
displaying elapsed time until the Stop button is hit or the Datebook 
hardware button is depressed. My problem is handling the OK button (to 
leave the dialog even while the timer is running) and events like a 
vchrLaunch keyDownEvent (to leave the application). None of my many 
attempts fully succeeded. Either the vchrLaunch is ignored, or the OK 
button, or both. My latest attempts goes like this. What's wrong?

case ctlEnterEvent :

    if ( event->data.ctlEnter.controlID != StartButton )
        return false;

    // update display every 0.1 s
    UInt32 timeout = SysTicksPerSecond() / 10L;

    do
    {
        EvtGetEvent( &loopEvent, timeout );

        if ( loopEvent.eType == nilEvent )
            // update elapsed time display

        // when entering Stop button, leave loop
        else if ( loopEvent.eType == ctlEnterEvent )
        {
            if ( loopEvent.data.ctlEnter.controlID == StopButton )
                break;
        }

        // if keyDownEvent, leave loop on Datebook key tap
        else if ( loopEvent.eType == keyDownEvent )
        {
            if ( loopEvent.data.keyDown.chr == vchrHard1 )
                break;
        }

        // let form handle pen events
        else if ( ( loopEvent.eType == penDownEvent ) ||
                  ( loopEvent.eType == penMoveEvent )||
                  ( loopEvent.eType == penUpEvent )
        {
            FrmDispatch( loopEvent );
            continue;
        }

        // let OS handle other events
        return SysHandleEvent( &loopEvent );

    } while ( time < 30.0 );    // stop loop after 30s

    // display elapsed time-related data

    handle = true
break;


--
Luc Le Blanc

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