Just out of curiosity. While your pen is down and moving, is it
possible for a low battery alert dialog box to pop up (or even some
other dialog box pops up due to a timer events)? If it is possible,
what would happen to your code below?
On 23 Oct 2002 at 9:49, Dave Parker wrote:
> In my opinion, for most uses, the most effective and reliable way to
> track the pen on the Palm (unlike Windows, and more like the original
> Mas OS) is to poll the pen position modally in response to a penDown,
> until the pen goes up, and ignore the penMove and penUp events. You
> will "hang" the device while the pen is down, but the alternative of
> trying to let other events through while you are tracking causes all
> sorts of problems that are very difficult to get right. And if you
> think about it, the consequences of delaying other events until the
> pen goes up is almost always a good thing for the user anyway. Thus,
> you want something like:
>
> case penDownEvent:
> if (FrmGetWindowHandle(FrmGetActiveForm()) ==
> WinGetActiveWindow())
> {
> EvtGetPen(&x, &y, &penDown);
> if (hit test at x, y)
> {
> while (penDown)
> {
> // process (x, y);
> EvtGetPen(&x, &y, &penDown);
> }
> handled = true;
> }
> }
> break;
>
> Anybody disagree?
>
> Dave Parker
> TapPoint www.tappoint.com
>
>
>
> "Nick Amato" <[EMAIL PROTECTED]> wrote in message
> news:99027@;palm-dev-forum...
> >
> > I've created a simple drawing program that stores the last position
> > of the pen then draws a straight line to the current position. The
> > program works fine on the emulator but when I run it on my
> > handspring I have a little grudge. When I click on the application
> > to run it, I click on the icon
> and
> > it loads my program and draws a line from the top corner to the
> > position where I touched the icon.
> >
> > Is there anyway to remove events in the frmOpenEvent without
> > screwing anything else up? Does someone have a different suggestion
> > on how to sidestep this problem?
> >
> > Thanks
> >
> > Nick
> >
> > case penDownEvent:
> > if(eventP->screenY <148) //make sure the drawing doesn't
> > affect
> the
> > buttons on bottom
> > {
> > old_x = eventP->screenX; //old_x and y are the
> > "previous"
> > coordinates and are global
> > old_y = eventP->screenY; //to this form.
> > handled = true;
> > }
> > break;
> >
> > case penUpEvent:
> > case penMoveEvent:
> > if(eventP->screenY <148)
> > {
> > setdot(eventP->screenX, eventP->screenY); //calls
> > WinPaintLine
> and
> > changes the "old" values
> > handled = true;
> > }
> > break;
> >
> >
> >
> >
> >
>
>
>
> --
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>
>
John Leung
[EMAIL PROTECTED]
http://persweb.direct.ca/jleung
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