You will need to filter the event yourself. It has been my finding that there is
about two to three pixels of noise from the LCD's
digitizer. On a penDown, you can save the coordinates of where you are. On a penMove
or penUp event, compare the coordinates there
to the one from last saved coordinates.
If the difference in either the x or y is greater than your threshold (I suggest two
to four pixels) draw a line between the two
coordinates and update the saved coordinates from what you got in penMove. It does
make you drawing less precise, but it is the
best I have found so far due to the inherent noise of the digitizer.
Steve
Jose Rodriguez Ruibal wrote:
> Hello Palm Forum,
>
> I would like to draw a single point when I do a "penDown" event
> on a gadget. Here is the code I used on my gadget event
> handler...
>
> case penDownEvent:
> GetObjectBounds(PGadget, &bounds);
> if (RctPtInRectangle(eventP->screenX, eventP->screenY, &bounds)) {
> WinDrawLine(eventP->screenX, eventP->screenY, eventP->screenX +1,
>eventP->screenY+1);
> handled = true;
> }
> break;
>
> I draw a single point, OK, but the precision I get don't please
> me a lot... How can I use also the "penMove" event to
> make an "action radius" getting the penDown event? Is there
> another kind of making my pendown event less sensible?
>
> Thank you a lot!
>
> --
> Best regards,
> Jose Rodriguez Ruibal
>
> NIT (Nomad Information Tech)
> e-mail: mailto:[EMAIL PROTECTED]
>
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